technical catelogue
TRANSCRIPT
CATALOGUE/TC-101July '2003
Khatipura Road, Jaipur - 302 006
This version supersedes all previous ones. Please be informed
that the bearings mentioned in this technical catalogue are normally
manufactured in normal tolerance class, however, other class bearings
can be supplied against specific requirements.
© NEI. Ltd. Jaipur. 2003
Although care has been taken to ensure the accuracy
of the data compiled in this catalogue NEI does not assume any
liability to any company or person for errors or ommisions.
This edition of the NBC Catalogue contains all necessary information and data required for
selection of right bearing for specific applications. The data is based on International Standards laid
down for the purpose and our manufacturing experience of more than 50 years.
Also our catalogue has been revised as per the latest standards for chamfer, dimensions,
bearing accuracies, quality symbols and definitions.
is the largest manufacturer of Ball & Roller Bearings, Steel
Balls and Axle Boxes complete with Roller bearing in India, which are being produced in factories at
Jaipur & Newai. Bearings are manufactured for every possible application and requirement of
modern engineering industry and we continue to develop new sizes, keeping pace with rapid
advancement in the Indian engineering industry.
NEI's technical collaborations with world's leading conglomerates in the field of Bearing technology
viz. have given a whole new
dimension to the product range and a quality par excellence.
NEI has already implemented modern concepts of Total Quality Management and accredited
certification , has also been awarded certificate for its concern &
commitment towards a cleaner environment. has successfully implemented to re-
engineer and integrate business processes to conform to world class standards.
We are confident that all users of products will find a new presentation of this technical
catalogue useful and informative and you are welcome to consult for every assistance in
selecting right bearing for any application that you have in mind.
For improvement as well as other reasons, the contents of this catalogue are subject to
change without prior notice.
IS/ISO
National Engineering Industries Ltd.
M/s NTN Corporation of Japan, M/s BRENCO Incorporated of USA
QS-9000 NEI ISO-14001
NEI SAP-ERP
NEI
NEl
FOREWORD
MILESTONES
1946
1950
1951
1957
1967
1971
1971
1975
1976
1981
Company Established as National Bearing Company (NBC) underTechnical Collaboration with Hoffman, U.K.
Ball Bearing Production Started
Railway Bearing Production Started
Company name changed to National Engineering Industries Ltd.(Retaining NBC as Trade Mark)
Established Research & Development Division
Established Machine Building Division
Large Diameter Special Bearings Production Started
Spherical Roller Bearings Production Started with TechnicalKnow how from FAG-SRO
Separate Factory for Ball Bearings at Gunsi (Newai)
Tapered Roller Bearings Production Started under TechnicalCollaboration with Federal Mogul Corporation, U.S.A.
1982
1985
1985
1990to95
1995
1996
1997
1998
1999
2000
Cartridge Tapered Roller Bearings Production Started inTechnical Collaboration with BRENCO Incorporated, U.S.A.
Largest Bearing with Outer Diameter 1.3 Meter & Weight 4.39 Tonsproduced
Technical Collaboration with NTN Corporation of Japan forBall, Cylindrical & Spherical Roller Bearings
ISO - 9001 Certificate
Technical Collaboration with NTN Corporation of Japan for Tapered Roller Bearings and Hub Bearings
IV Phase - Modernisation Started
Implemented Ist Phase of SAP-ERP Solutions
QS-9000 & ISO-14001 Certification.
Technical Collaboration with M/s Izumi Kinzoku Kogyo Co. Ltd.,Japan for Machine Retrofitting/Remanufacturing and overhauling.
Modernization in Three Phases
CONTENTSPAGE NO.
1. ROLLING BEARING CONSTRUCTION AND CLASSIFICATION
1.1 Bearing Classification
2. BEARING DESIGNATION
3. BEARING SELECTION
4. LOAD RATING AND LIFE
4.1 Basic Dynamic Load Rating and Life
4.2 Basic Static Load Rating
4.3 Life Factors for application
5. ACCURACY AND TOLERANCES
5.1 Running Accuracy
5.2 Tolerances for Radial Bearings (Metric Series)
5.3 Tolerances for Tapered Roller Bearing (Metric Series)
5.4 Tolerances for Tapered Roller Bearing (Inch Series)
5.5 Chamfer Dimensions Limits for Roller Bearings
5.6 Basic Tapered Bore
6. BEARING INTERNAL CLEARANCE
6.1 Internal Clearance Selection
6.2 Radial Internal Clearance Value
7. LUBRICATION
7.1 Types of Lubrication
7.2 Methods of Oil Lubrication
1
5
6
7
11
21
29
1. SEATINGS LIMITS AND FITS
8.1 Seatings
8.2 Fits
8.3 Limits and Fit guidelines
9. BEARING HANDLING
9.1 Mounting
9.2 Dismounting & Replacement
9.3 Bearing Cleaning
9.4 Abutment for Bearing
10. BEARING FAILURE
10.1 Why Bearings Fail
10.2 Bearing Damage & Corrective measures
11. BEARINGS TABLES
Single Row Radial Ball Bearing ..................................... 56-60
Angular Contact Ball Bearing ..................................... 61-62
Self Aligning Ball Bearing ..................................... 63-66
Special Bearing Races ..................................... 67
Special Bearings ..................................... 68
Cylindrical Roller Bearing ..................................... 69-76
Single Row Tapered Roller Bearing (Inch Series) ..................................... 77-89
Double Row Tapered Roller Bearing ..................................... 90
Four Row Tapered Roller Bearing ..................................... 91
Thrust Bearing ..................................... 92
Spherical Roller Bearing ..................................... 93
37
43
52
56
1. ROLLING BEARING CONSTRUCTION AND CLASSIFICATION
Rolling bearings are generally composed of bearing rings, rolling elements and cages. Several rolling elements are placed between two bearing rings and cages prevent the rolling elements from contact and with such a structure, a smooth rolling action becomes possible.
Rolling bearings are divided into radial bearings and thrust bearings, mainly depending on the applicable load direction. Radial bearing mainly take radial loads. Most types of radial bearings can also take thrust loads. Thrust bearings generally take thrust loads only and not radial loads.
Rolling bearings are largely divided into ball bearings and roller bearings in accordance with the types of rolling elements, Roller bearings are further divided depending on the shape of the roller into cylindrical roller bearings tapered roller bearings, spherical roller bearings and needle roller bearings. Ball bearings are divided into several types, depending on the shape of bearing rings and the contact position between the balls and the raceway.
The cages of rolling bearings are divided into pressed and machined ones with the shapes differing according to the bearings type and conditions of use.
1.1 Bearing Classification
1.1.1 Single Row Radial Ball Bearings
The Single row radial ball bearings accommodate pure radial, pure axial or any combination of radial and axial loads within its capacity. These can operate at very high speeds. For these reasons and its economical price, it is the most widely used bearing.
Owing to high degree of conformity between balls and raceways, the self aligning capability of deep groove ball bearings is small. This fact calls for well aligned bearing mountings.
These bearings can be located endwise in both the directions.
Different variations in the type are as shown below :
Outer ring
Inner ring
Cage
Ball
1
Deep Groove single Row Ball Bearing
Z
ONE DUST SHIELD
ZZ
TWO DUST SHIELD
SHIELD TYPE
LU/LH LLU/LLH
TWO RUBBER SEALSONE RUBBER SEAL
RSSRS
SEAL TYPE
ZNR
SNAP RING &ONE DUST SHIELD
SNAP RING &TWO DUST SHIELDS
ZZNRN NR
SNAP RINGSNAP RINGGROOVE
TWO RUBBER SEALSONE RUBBER SEAL
TMB Ball Bearings
TMB ball bearings have the same boundary dimensions as standard deep groove ball bearings, but have undergone a special heat treatment that considerably extends wear life. These bearings were especially effective in countering reduced wear life due to the effects of infiltration of dust and other foreign matter.! TMB ball bearings’ special characteristics are identical to
standard ball bearings at rated loads, but with a bearing characterization factor of a = 2.22
! TMB 62 series bearings can be used in place of standard 63 series bearings enabling lighter weight, more compact designs.
For dimensional specifications and other detailed information about TMB ball bearings, contact NEI Technical Cell.
1.1.2 Single Row Radial Ball Bearing with Tapered Bore
The single row radial ball bearings with tapered bore are identical to single row radial ball bearings except that these have tapered bore which is used for easier mounting and for the adjustment of radial clearance.Dimensions of tapered bore diameter refer to small bore.
1.1.3 Single Row Angular Contact Ball Bearing
The single row angular contact ball bearings have higher axial load capacity than the single row radial ball bearings. The radial load must always be less than axial load.
The bearings can carry axial load in one direction only and should be adjusted against another bearing, if axial load is coming from both the directions.Each bearing can be located endwise in one direction only.
1.1.4 Single Row Externally Aligning Ball Bearing
The single row externally aligning ball bearings are used where accurate alignment can not be guaranteed between bearing positions. It can take radial loads. Axial loads can also be accommodated.
The shell housing must not be made an interference fit on their outside diameter. If an interference fit is used, the shell housing may contract and prevent alignment.
These bearings can be located endwise in both the directions.
1.1.5 Double Row Self Aligning BalI Bearing
The double row self aligning ball bearings have the common outer spherical race for both the rows. This feature gives the bearings self aligning properties. The bearings have the sameexternal dimensions as there equivalent single row radial ball bearings. They can take radial loads and very light axial loads. They can be located endwise in both the directions.
SINGLE ROW RADIALBALL BEARING WITH
TAPER BORE
SINGLE ROWEXTERNALY ALIGNING
BALL BEARING
SINGLE ROWANGULAR CONTACT
BALL BEARING
TAPERED BORE 1:12CYLINDRICAL BORE
2
Double Row Self Aligning BalI Bearing
1.1.6 Double Row Self-Aligning Ball Bearing with Tapered Clamping Sleeve and Nut
The double row self-aligning ball bearings with tapered clamping sleeve and nut are identical to double row self-aligning ball bearing except that these have a tapered bore, which is used for easier mounting and also a clamping sleeve and nut to clamp the bearings on the shaft. The tapered bore is also used for the adjustment of radial clearance.
1.1.7 Thrust Ball Bearing
The thrust ball bearings are used for high axial loads at low speeds. These can not operate at high speed as it will give rise to centrifugal or radial forces which can not be taken by the bearings.
They can be located endwise in one direction only.
1.1.8 Cylindrical Roller Bearing
The cylindrical roller bearings have greater radial load capacity than ball bearings of same external dimensions and are particularly suitable for arduous duties. The bearing features a modified line contact between rollers and raceways to eliminate edge stressing. These bearings have a high radial load capacity and are suitable for high speeds. Due to detachable design character they have advantage of mounting inner ring and outer ring separately.
The direction of axial load which a bearing can take depending upon the geometry of the bearing. Many variations available are shown below :
3
Double Row Self-Aligning Ball Bearing with Tapered Clamping Sleeve and Nut
Type NU Type NJ Type NFType NUP Type N
B
D d
UPPER THRUSTPLATE
CAGE
BALL
LOWER THRUSTPLATE
Thrust Ball Bearing
1.1.9 Tapered Roller Bearing
Tapered roller bearings are designed in such a way that vertices of the cone for each roller and those for the inner and outer raceways coincides on the bearing axis or extensions of the raceways and rollers converge at a common point on the axis of rotation. This results in true rolling motion of the rollers on the raceways at every point along the rollers.
The tapered roller bearings support radial loads and axial loads from one direction only. The line contact between rollers and raceways provide the bearings with a high load carrying capacity. Steep angle tapered roller bearing with exceptionally steep cone angle enables the bearings to take heavier axial load.
The bearings are of separable type, enabling separate mounting of cups and cones.
Since the tapered roller bearings can absorb thrust loads in one direction only, these bearings should generally be installed as opposed mountings. The correct amount of radial and axial clearance is obtained by adjusting the two bearings against each other.
Besides, double row and four row tapered roller bearings are also widely used for heavy loads such as rolling mills.
A single row tapered roller bearing can be located endwise in one direction only.
1.1.10 Spherical Roller Bearing
Spherical roller bearings are particularly suitable for carrying heavy loads. They are usually of the double row design, both of the rows of the rollers having common spherical raceways in the outer ring. This feature of this bearing has great practical importance in those cases where it is difficult to obtain exact parallelism between the shaft and housing both axes. So these bearings are suitable where misalignment can arise from mounting errors or from deflection of the shaft.
Outer ring
Roller
Cage
Inner ring
4
Tapered Roller Bearing
Spherical Roller Bearing
2. BEARING DESIGNATION
Rolling bearing part numbers indicate bearing type, dimensions, tolerances, internal construction & other related specifications. The first letter (digit) indicates the bearing type. The second digit indicates the width (or height) series & the third indicates the diameter series. The last two digits indicate the bore diameter by multiplying the last two digit by five for bearing having bore diameter original 40 mm & above. This method is applicable for metric series bearing only.
Example
5
6207 Z C3
0Contact angle 15
Nominal bore diameter 60mm
Diameter series 2
Angular contact ball bearing
Nominal bore diameter 20mm
Diameter series 2
Width series 0
Tapered roller bearing
Radial internal clearance C3
Nominal bore diameter 150mm
Diameter series 3
Cylindrical roller bearing
NU type
Tapered bore (1:12)
Nominal bore diameter 30mm
Diameter series 2
Self Aligning ball bearing
22328
Nominal bore diameter 140mm
Diameter series 3
Diameter series2
Spherical roller bearing
Radial internal Clearance C3
Shielded (one side)
Nominal bore diameter 35mm
Diameter series 2
Deep groove ball bearing
7212C
30204
NU330C3
1206K
The following procedure gives the steps to be followed when bearings are selected from the information contained in this catalogue. It will be found satisfactory for most applications, but to be sure, please consult the NEI Advisory Service.
1. a. Determine the speed of the bearing. b. Calculate the loads on the bearing.
2. Establish if accurate alignment can be obtained between the bearing seating. If it can not , then bearings that accommodate misalignment should be selected.
3. If the bearing is to rotate under load, decide the life required, calculate the required 'C' value, and then select suitable bearing that have comparable 'C' value.
4. Check if the bearing is suitable for the speed and decide if grease or oil is to be the lubricant.
5. Select a suitable bearing arrangement if this is not already known. Make sure that this arrangement is suitable to seating fits.
6. Finally a. decide whether 'Standard' or 'Extra Precision limit of accuracy is required.b. select the most suitable range of diametric clearance.c. choose the abutment diameters.d. choose suitable closures.e.issue mounting and handling instructions for the bearings if necessary.
Please consult NEIi) if bearings are required in corrosion-resisting or in other
special materials.ii) it two bearings are mounted close together, special
pairing of the two bearings may be necessary to ensure that they share the load.
iii) If the speed and temperature conditions are not provided for the information contained in this catalogue.
BEARING SELECTION BY NEI ADVISORY SERVICE
Our Engineers will be pleased to recommend the most suitable bearing and best method of mounting for any specified conditions. If you wish to use this service you should send all information relevant to your purpose on the following basis.
1 . Provide a drawing or sketch showing layout of the parts involved and position in which the bearings are to befitted, giving size of shaft and any dimensions limiting the space available.
2. Include a brief description of the mechanism if this is not clear from the drawing.
3. Give the speed and sufficient information, so that loadon each bearing can be calculated accurately.
4. Indicate any unusual features such as the possibility of shock or vibration, unbalanced load, high temperature, or the presence of dirt, moisture or fumes.
5. Give the bearing life requirements and indicate whetherthe duty is continuous for 24 hrs. a day , or onlyintermittent. If intermittent, give periods of running andstanding.
6. If the working conditions vary considerably, give the normal duty and also the peak conditions with the frequency and duration of peaks.
7. Say whether oil or grease lubrication is to be used.
8. Say whether the bearings can be lined up accurately or whether bearings with an aligning feature are required.
3. BEARING SELECTION
6
4. LOAD RATING AND LIFE4.1 Basic Dynamic Load Rating and Life
Even in bearings operating under normal conditions the surface of the raceways and rolling elements are constantly being subjected to repeated compressive stresses which cause flaking of these surfaces to occur. This flaking is due to material fatigue and will eventually cause the bearing to fail.
The effective life of a bearing is usually defined in terms of the total numbers of revolutions a bearing can undergo before flaking of either the raceway surface or the rolling elements surfaces occurs.
When a group of apparently identical bearings operate under identical load conditions, the life of individual bearings show a considerable dispersion. Therefore, a statistical definition of the life is applied for the calculation of the bearing life. When selecting a bearing, it is not correct to regard the average life of all bearings as the criterion of life: It is more practical to adopt the life that the majority of bearing will attain or exceed.
For this reason the basic rating life of a group of bearings is defined as the number of revolutions (or hours at some given constant speed) that 90% of the group of bearings will complete or exceed before the first evidence of fatigue develops.
The basic dynamic load is defined as the constant stationary load which a group of bearings with stationary outer ring can endure for a rating life of one million revolutions of the inner ring. It refers to pure radial load for radial bearings and to pure axial load for thrust bearings.
The relationship among the bearing basic dynamic load rating, the bearing load and the basic rating life, is given by the following formula.
pC_
L = ( )10 PWhere
L = Basic rating life in millions revolutions10
C = Basic dynamic load rating, in NewtonP = Equivalent dynamic load, in Newtonp = exponent for the life formula
p = 3 for ball bearingsp = 10/3 for roller bearings
In many cases it is convenient to express the basic rating life in terms of operating hours rather than the number of revolutions, using the following procedure:Where
L = 500 (f ) h10h
f = fh n
f = 33.3 n
nWhere L = basis rating in hours of operation10h
f = life factorh
f = speed factorn
n = operating speed, rev./minThe above formula may also be expressed as :
L = 10h
The basic rating life can also be expressed in terms of kilometers for wheel bearings as shown in formula below :
L10S = x L10
Where D = Wheel diameter in mm L10S = Basic rating life in kms.
The value of f and the rating life for ball and roller bearing ncan be found by means of the diagrams given on page no. 8.
4.1.1 Adjusted life rating factor
The basic life rating (90% reliability factor) can be calculated through the formula mentioned above. However, in some applications a bearing life factor of over 90% reliability may be required to meet these requirements, bearing life can be lengthened by the use of specially improved bearing material or special construction technique. Moreover according to elastohydrodynamic lubrication theory, it is clear that the bearing operating conditions (lubrication, temperature, speed, etc.) all exert an effect on bearing life. All these adjustment factors are taken into consideration while calculating bearing life and using the life, adjustment factor as prescribed in ISO 281 , the adjusted bearing life is arrived at.
Lna = a . a . a . 1 2 3
Where,Lna : Adjustment life rating in millions of
6revolutions (10 ) adjusted for reliabilitymaterial and operatingconditions
a : Reliability adjustment factor1
a : Material/construction adjustment factor2
a : Operating condition adjustment factor3
4.1.1.1 Life adjustment factor for reliability a1
The values for the reliability adjustment factor a ( for a 1
reliability factor higher than 90% ) can be found from table given below :-
Reliability adjustment factor values
Formula for factor a1 2/3a = 4.48[Ln(100/R)]1R = ReliabilityL = Log Factor (Base 'e')n
CP( )
p
pD1000
Reliability
90
95
96
97
98
99
Ln
L10
L5
L4
L3
L2
L1
Reliability factor a1
1.00
0.62
0.53
0.44
0.33
0.21
7
( )1/p
CP( )
p1060n
6
p
CP( )
4.1.1.2 Life adjustment factor for material construction a2
The value for the basic dynamic load rating given in the bearing dimension tables are for bearings constructed from NEI's continued efforts at improving the quality and life of its bearings.
Accordingly, a = 1 is used for the adjustment factor in the 2
formula. For bearings constructed of specially improved materials or with special manufacturing methods, the life adjustment factor a in life can have a value greater than one.2
When high carbon chromium steel bearings, which have undergone only normal heat treatment, are operated for long periods of time at temperatures in excess of 120°C considerable dimensional deformation may take place. For this reason, there are special high temperature bearings which have been heat treated for dimensional stability. This special treatment allows the bearing to operate at its maximum operational temperature without the occurrence of dimensional changes. However, these dimensionally stabilized bearings, designated with a 'TS' prefix have a reduced hardness with a consequent decrease in bearing life. The adjusted life factor values used in life formula for such heat-stabilized bearing can be found in Table given below
4.1.1.3 Life adjustment factor a for operating conditions 3
The operating conditions life adjustment factor a3 is used to adjust for conditions such as lubrication, operating temperature, and other operation factors which have an effect on bearing life.
Generally speaking when lubricating conditions are satisfactory the a factor has a value of one, and when 3
lubricating conditions are exceptionally favourable, and all other operating conditions are normal a can have a value 3
greater than one.
However, when lubricating conditions are particularly unfavorable and oil film formation on the contact surfaces of the raceway and rolling elements is insufficient, the value of a becomes less than one. This insufficient oil film formation 3
can be caused, for example, by the lubricating oil viscosity 2being too low for the operating temperature (below 13 mm /s
2for ball bearing and below 20mm /s for roller bearings); or by exceptionally low rotational speed [n (r/min) x dp (mm) less than 10,000]. For bearings used under special operating conditions, please consult NEI.
0Life adjustment value for operating temperature C As the operating temperature of the bearing increases, the hardness of the bearing material decreases. Thus, the bearing life correspondingly decreases. The operating temperature adjustment values are shown in above figure.
TS2
TS3
TS4
Code
160
200
250
Max. operating0temperature C
0.87
0.68
0.30
Adjustment factor
a2
100 150 200 250 300
Lif
e ad
just
men
t va
lue
a 3
1.0
0.8
0.6
0.4
0.2
Operating Temperature °C
8
Ball bearings Roller bearings
n fn L10h
rev/min h
fh n fn L10h
rev/min h
fh
60000 0.082
40000
30000
20000
15000
0.09
0.12
0.14
0.10
100008000
6000
4000
3000
2000
0.16
0.18
0.22
0.24
0.26
0.20
1000
1500 0.28
0.30
800
600
400
300
200
150
0.35
0.4
0.5
0.6
0.7
0.8
0.9
1.1
1.2
1.3
1.4
10080
60
40
30
20
15
10
1.0
1.49 2000.74
60000
40000
30000
20000
15000
10000
80000 5.4
5
4
3
2
4.5
3.5
2.58000
6000
4000
3000
2000
1500
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1000900
800
700
600
500
400
300
1.00.95
0.90
0.85
0.80
0.7510
1.441.4
1.1
1.2
1.3
1.0
0.9
0.8
0.7
0.6
0.5
10080
60
40
30
20
15
1000800
600
400
300
200
150
0.24
0.26
0.28
0.30
0.35
0.4
8000
6000
4000
3000
2000
1500
10000
0.20
0.22
0.14
0.16
0.18
0.12
60000
40000
30000
20000
15000
0.106
80000
60000
40000
30000
20000
15000
4.5
4
3.5
3
4.6
10000 2.5
8000
6000
4000
3000
2000
1500
2
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1000900
800
700
600
500
400
300
1.2
1.1
1.00.95
0.90
0.85
0.80
200 0.76
Fig. Diagram for basic rating life
4.2 Basic Static Load Rating
The Static load is defined as a load acting on a non-rotating bearing. Permanent deformation appears in rolling elements and raceways under static load of moderate magnitude and increases gradually with increasing load. The permissible static load, therefore, depends upon the permissible magnitude of permanent deformation.
Experience shows that total permanent deformation of 0.0001 times of the rolling element diameter, occurring at the most heavily loaded rolling element and raceway contact can be tolerated in most bearing applications without impairment of bearing operation.
In certain applications where subsequent rotation of the bearing is slow and where smoothness and friction requirements are not too exacting, a much greater total permanent deformation can be permitted. On the other hand, where extreme smoothness is required or friction requirements are critical, less-total permanent deformation may be tolerated.
For purpose of establishing comparative ratings, the basic static load rating therefore, is defined as that static radial load which corresponds to a total permanent deformation of rolling element and raceway at the most heavily stressed contact set at 0.0001 times of the rolling element diameter. It applies to pure radial load for radial bearing and pure axial load for thrust bearing.
In single row angular contact bearing, the basic static load rating relates to the radial component of the load, which causes a purely radial displacement of the bearing rings in relation to each other.
The maximum applied load values for contact stress occurring at the rolling element and raceway contact points are as follows :
For ball bearing 4200MPa
For self aligning ball bearing 4600MPa
For roller bearing 4000MPa
The static equivalent load is defined as that static radial load, which, if applied to Deep Groove Ball bearings, Angular Contact or Roller bearings would cause the same total permanent deformation at the most heavily stressed rolling element and raceway contact as that which occurs under the actual conditions of loading. For thrust bearings the static equivalent load is defined as that static, central, purely axial load which, if applied, would cause the same total permanent deformation at the most heavily stressed rolling element and raceway contact as that which occurs under the actual condition of loading.
9
4.3 Life Factor for Applications
Life factor fh
ServiceRequirements
Machinesusedoccasionally
Equipment forshort period orintermittent serviceinterruptionpermission
< 1.0 1.0-2.0 2.0-2.5 2.5-3.0 3.0-3.5 3.5-4.0 4.0-5.0 5.0
Doormechanismsmeasuringinstruments
Medicalequipment
Householdappliances,electric handtools,agriculturemachines,lifting tacklesin shop
Intermittent servicemachines highreliability
Power stationauxiliaryequipment,constructionmachines,Crane sheaveselevators,Conveyors,deck cranes,Cranes
CraneSheaves
Machines usedfor 8 hours a daybut not alwaysin fulloperation
Automobiles,motorcycles,internalgrindingspindles, oretub axles
Buses, Trucks
Wood workingmachines,gear drives,plunger pumpsvibratingscreens
Small electricmotors,grindingspindles,boringmachinespindlesrotarycrushers,industrialWagon axles
Lathe spindles,press flywheelsprintingmachines
Agitatorsimportant gearunits
Machines fullyused for 8hours Small rolling
mill rollnecks
Large rollingmill rollnecks,rolling milltable rollers,excavatorscentrifugalseperatorscontinuousoperationconveyors
Industrialelectricmotors,blowers, airconditionersstreet car orfreight wagonaxles, generalmachinery inshop,continuousoperationcranes
Large electricmotors, rollingmill gear unitsplasticextruders,rubber-plasticscalendar rolls,railway vehicleaxles, tractionmotors,conveyors ingeneral use
Locomotiveaxles, railwayvehicle gearunits, falsetwist textilemachines
Machinescontinuouslyused for 24hours a day
Loom Electric motorsin shopcompressors,pumps
Textilemachines,mine winches,iron industryconveyors
Papermakingmachine, mainrollsmachines
Machinescontinuouslyused for 24hours a daywith maximumreliabilitypumps
Power stationequipments,watersupplyequipments forurban areas,mine drain
10
5. ACCURACY AND TOLERANCESThe accuracy of rolling bearings is classified as dimensional accuracy and running accuracy.
Dimensional accuracy indicates the tolerance and tolerance limits of boundary dimensions as well as the tolerance limits of width variations and of the taper of tapered bore. Running accuracy indicates the tolerance limits of outside cylindrical surface runout with side, radial runout, side runout with bore and axial runout.
5.1 Running Accuracy (As per ISO: 1132)
5.1.1 Radial Runout
Radial runout of assembled bearing inner ring, Kia (radial bearing): Difference between the largest and the smallest of the radial distances between the bore surface of the inner ring, in different angular positions of this ring, and a point in fixed position relative to the outer ring. At the angular position of the point mentioned, or on each side and close to it, rolling elements are to be in contact with both the inner and outer ring raceways and (in a tapered roller bearing) the cone back face rib, the bearing parts being otherwise in normal relative positions.
Radial runout of assembled bearing outer ring, Kea (radial bearing) : Difference between the largest and the smallest of the radial distance between the outside surface of the outer ring, in different angular positions of this ring, and a point in a fixed position relative to the inner ring. At the angular position of the point mentioned, or on each side and close to it, rolling elements are to be in contact with both the Inner and outer ring raceways and (in a tapered roller bearing) the cone back face rib, the bearing parts being otherwise in normal positions.
5.1.2 Face runout with raceway
Assembled bearing inner ring face runout with raceway, Sia (groove type radial ball bearing) : Differences between the largest and the smallest of the axial distances between the reference face of the inner ring, in different relative angular positions of this ring, at a radial distance from the inner ring axis equal to half the inner ring raceway contact diameter, and a point in a fixed position relative to the outer ring. The inner and the outer ring raceways are to be in contact with all the balls.
Assembled bearing cone back face runout with raceway, Sia (tapered roller bearing) : Difference between the largest and the smallest of the axial distances between the cone back face, in different angular positions of the cone, at a radial distance from the cone axis equal to half the cone raceway contact diameter and a point in a fixed position relative to the cup. The cone and cup raceways and the cone back face rib are to be in contact with all the rollers, the bearing parts being otherwise in normal relative positions.
Assembled bearing outer ring face runout with raceway Sea (groove type radial ball bearing) : Difference between the largest and the smallest of the axial distances between the reference face of the outer ring, in different relative
angular positions of this ring, at a radial distance from the outer ring axis equal to half the outer ring raceway contact diameter, and a point in a fixed position relative to the inner ring. The inner and outer ring raceways are to be in contact with all the balls.
Assembled bearing cup back face runout with raceway Sea (tapered roller bearing) : Difference between the largest and the smallest of the axial distances between the cup back face, in different angular positions of the cup, at a radial distance from the cup axis equal to half the cup raceway contact diameter, and a point in a fixed position relative to the cone. The cone and cup raceways and the cone back face rib are to be in contact with all the rollers, the bearing parts being otherwise in normal relative positions.
5.1.3 Face runout with bore
Face runout with bore, Sd (inner ring reference face): Difference between the largest and the smallest of the axial distances between a plane perpendicular to the ring axis and the reference face of the ring, at a radial distance from the axial of half the inner ring raceway contact diameter.
5.1.4 Raceway parallelism with face
Raceway parallelism with face, Si or Se (inner or outer
ring of groove type radial ball bearing reference face) : Difference between the largest and the smallest of the axial distances between the plane tangential to the reference face and the middle of the raceway.
5.1.5 Outside surface inclination
Variation of outside surface generatrix inclination with face, Sd (outer ring basically cylindrical surface reference face ) : Total variation of the relative position in a radial direction parallel with the plane tangential to the reference face of the outer ring, of points on the same generatrix of the outside surface at a distance from the side faces of the ring equal to the maximum limits of the axial chamfer dimension.
5.1.6 Thickness-variation
Inner ring raceway to bore thickness variation, Ki (radial bearing) : Difference between the largest and the smallest of the radial distances between the bore surface and the middle of a raceway on the outside of the ring.
Outer ring raceway to outside surface thickness variation, Ke (radial bearing) : Difference between the largest and the smallest of the radial distances between the outside surface and the middle of a raceway on the inside of the ring.
11
5.2 Tolerances For Radial Bearings(As per ISO : 492, IS:5692)
-Symbols
d = bearing bore diameter, nominal
d1 = basic diameter at theoretical large end of a basically tapered bore
Dds = deviation of a single bore diameter
Ddmp = single plane mean bore diameter deviation (for a basically tapered bore Ddmp refers only to the theoretical small end of bore)
Dd1mp = mean bore diameter deviation at theoretical large end of a basically tapered bore
Vdp = bore diameter variation in single radial plane
Vdmp = mean bore diameter variation ( this applies only to a basically cylindrical bore)
= taper angle, nominal
D = bearing outside diameter, nominal
D1 = outer ring flange outside diameter, nominal
DDS = deviation of single outside diameter
DDmp = single plane mean outside diameter deviation
VDp = outside diameter variation in a single radial plane
VDmp = mean outside diameter variation
B = inner ring width, nominal
DBS = deviation of single inner ring width
VBS = inner ring width variation
C = outer ring width, nominal
C1 = outer ring flange width, nominal
DCS = deviation of single outer ring width
DC1S = deviation of a single outer ring flange width
VCS = outer ring width variation
VC1S = outer ring flange width variation
Kia = radial runout of assembled bearing inner ring
Kea = radial runout of assembled bearing outer ring
Sd = inner ring reference face (back face, where applicable) runout with bore
SD = variation of bearing outside surface generatix inclination with outer ring reference face (back face)
SD1 = variation of bearing outside surface generatix inclination with flange back face
Sia = assemble bearing inner ring face (backface) runout with raceway
Sea = assembled bearing outer ring face (backface) runout with raceway
Sea1 = assembled bearing outer ring flange backface runout with raceway
12
B
ODOd
5.2.1 Tolerances for Normal Tolerance Class Radial Bearings (Except Tapered Roller Bearings) – METRIC SERIES
TABLE 5.2.1: INNER RING
Values in microns
d (mm) D dmp
Over
K ia
DBS
VBS
Including High Low Max
Diameter Series
Vdp
9 0,1 2,3,4
Max Max High MaxLow
All Normal ModifiedVdmp
2.5
10
18
30
50
80
120
180
250
315
400
500
630
800
10
18
30
50
80
120
180
250
315
400
500
630
800
1000
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-8
-8
-10
-12
-15
-20
-25
-30
-35
-40
-45
-50
-75
-100
10
10
13
15
19
25
31
38
44
50
56
63
94
125
8
8
10
12
19
25
31
38
44
50
56
63
94
125
6
6
8
9
11
15
19
23
26
30
34
38
55
75
6
6
8
9
11
15
19
23
26
30
34
38
55
75
10
10
13
15
20
25
30
40
50
60
65
70
80
90
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-120
-120
-120
-120
-150
-200
-250
-300
-350
-400
-450
-500
-750
-1000
-250
-250
-250
-250
-380
-380
-500
-500
-500
-630
-
-
-
-
15
20
20
20
25
25
30
30
35
40
50
60
70
80
D (mm)
Over
Kea
Dcs
Dc1s
Including High Low Max
Diameter Series
VDP
Open Bearings
0,1 2,3,4Max Max High MaxLow
VDmp
6
18
30
50
80
120
150
180
250
315
400
500
630
800
1000
1250
1600
2000
18
30
50
80
120
150
180
250
315
400
500
630
800
1000
1250
1600
2000
2250
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
-8
-9
-11
-13
-15
-18
-25
-30
-35
-40
-45
-50
-75
-100
-125
-160
-200
-250
10
12
14
16
19
23
31
38
44
50
56
63
94
125
155
200
250
310
8
9
11
13
19
23
31
38
44
50
56
63
94
125
155
200
250
310
6
7
8
10
11
14
19
23
26
30
34
38
55
75
94
120
150
190
10
12
16
20
26
30
38
-
-
-
-
-
-
-
-
-
-
-
6
7
8
10
11
14
19
23
26
30
34
38
55
75
94
120
150
190
15
15
20
25
35
40
45
50
60
70
80
100
120
140
160
190
220
250
Identical to DBS andVBS of Inner ring of same bearing
Max
CappedBearing
9 2,3,4
TABLE 5.2.2: OUTER RING
13
Values in microns
D Dmp Vcs
Vc1s
5.2.2 Tolerances For Radial Roller Bearings
Tapered Roller Bearings
- FOR METRIC SERIES AS PER ISO 492 / IS : 7460 STANDARDS - FOR INCH SERIES AS PER ISO/578 STANDARDS.
Symbols
d = bearing bore diameter, nominal
Dds = deviation of a single bore diameter
Ddmp = single plane mean bore diameter deviation (for a basically tapered bore Ddmp refers only to the theoretical small end of bore)
Vdp = bore diameter variation in single radial planeVdmp = mean bore diameter variation ( this applies only to a basically cylindrical bore )D = bearing outside diameter, nominalD1 = outer ring flange outside diameter, nominal
DDS = deviation of a single outside diameter
DDmp = single plane mean outside diameter deviation VDP = outside diameter variation in a single radial plane VDmp = mean outside diameter variationB = inner ring width, nominalT = bearing width, nominal
DTs = deviation of the actual bearing widthT1 = effective width of inner sub-unit, nominal
DBs = deviation of single inner ring widthC = outer ring width, nominal
DCs = deviation of single outer ring widthKia = radial runout of assembled bearing inner ring Kea = radial runout of assembled bearing outer ringSd = inner ring reference face (backface, where applicable) runout with boreSD = variation of bearing outside surface generatix inclination with outer ring reference face (back face) Sia = assemble bearing inner ring face (backface) runout with raceway Sea = assembled bearing outer ring face (backface) runout with raceway
DT1s = deviation of the actual effective width of inner sub unitT2 = effective width of outer sub-unit, nominalT2s = deviation of the actual effective width of outer sub-unit
14
SYMBOLS FOR TAPERED ROLLER BEARINGS
MASTER INNER SUB UNIT
OD
OdB
C
T T 1 T 2
MASTER OUTER SUB-UNIT
5.3 Tolerance For Tapered Roller Bearing (METRIC SERIES) NORMAL TOLERANCE CLASS
5.3 Metric Series (ISO 492)
D dmpd (mm)
Over Including High Low Max Max Max
Vdp Vdmp Kia
10
18
30
50
80
120
180
250
315
18
30
50
80
120
180
250
315
400
0
0
0
0
0
0
0
0
0
-12
-12
-12
-15
-20
-25
-30
-35
-40
12
12
12
15
20
25
30
35
40
9
9
9
11
15
19
23
26
30
15
18
20
25
30
35
50
60
70
D DmpD (mm)
Over Including High Low Max Max Max
VDp VDmp Kea
18
30
50
80
120
150
180
250
315
400
500
30
50
80
120
150
180
250
315
400
500
630
0
0
0
0
0
0
0
0
0
0
0
-12
-14
-16
-18
-20
-25
-30
-35
-40
-45
-50
12
14
16
18
20
25
30
35
40
45
50
9
11
12
14
15
19
23
26
30
34
38
18
20
25
35
40
45
50
60
70
80
100
TABLE 5.3.1 - INNER RINGTolerance value in microns
TABLE 5.3.2 - OUTER RING
Tolerance value in microns
15
Over Including High High High High HighLow Low Low Low Low
10
18
30
50
80
120
180
250
315
18
30
50
80
120
180
250
315
400
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
+200
+200
+200
+200
+200
+350
+350
+350
+400
+100
+100
+100
+100
+100
+150
+150
+150
+200
+100
+100
+100
+100
+100
+200
+200
+200
+200
-120
-120
-120
-150
-200
-250
-300
-350
-400
-120
-120
-120
-150
-200
-250
-350
-350
-400
0
0
0
0
-200
-250
-250
-250
-400
0
0
0
0
-100
-150
-150
-150
-200
0
0
0
0
-100
-100
-100
-100
-200
D Bs D Cs D Ts D T1s D T2sdmm
TABLE 5.3.3 WIDTH - INNER AND OUTER RING, SINGLE ROW BEARING AND SINGLE ROWSUBUNITS
Tolerance value in microns
16
5.4 Tolerance For Tapered Roller Bearing (Inch Series) Inch sizes (As per ISO/578 Specifications)
TABLE 5.4.1 INNER RING BORE, INNER RING WIDTH AND BEARING WIDTH
Toleranceclass Over Including High HighLow Low
d D ds D BS
High Low
D Ts
Inch Value in 0.0001 inch
mm Value in 0.001 mm
4
3
0
00
4
3
0
00
0
(3)
(4)
0
0
0
0
76.2
101.6
0
0
0
3
4
6
6
6
6
76.2
101.6
152.4
152.4
152.4
152.4
+5
+10
+10
+5
+5
+3
+13
+25
+25
+13
+13
+8
0
0
0
0
0
0
0
0
0
0
0
0
+30
+30
+30
+30
+30
+30
+76
+76
+76
+76
+76
+76
-100
-100
-100
-100
-100
-100
-254
-254
-254
-254
-254
-254
+80
+80
+140
+80
+80
+80
+203
+203
+356
+203
+203
+203
0
0
-100
-80
-80
-80
0
0
-254
-203
-203
-203
NOTE : The Cage may project beyond the bearing width.
Toleranceclass Over Including High HighLow Low
D D DS D cs KiaKeaMax
SiaSeaMax
Inch Value in 0.0001 inch
mm Value in 0.001 mm
4
3
0
00
4
3
0
00
0
(12)
0
(12)
0
0
0
(304.8)
0
(304.8)
0
0
12
14
12
14
12
10.5
304.8
355.6
304.8
355.6
304.8
266.7
+10
+20
+5
+10
+5
+3
+25
+51
+13
+25
+13
+8
0
0
0
0
0
0
0
0
0
0
0
0
+20
+20
+20
+20
+20
+20
+51
+51
+51
+51
+51
+51
-100
-100
-100
-100
-100
-100
-254
-254
-254
-254
-254
-254
20
20
3
7
1.5
0.75
51
51
8
18
4
2
20
20
3
7
1.5
0.75
51
51
8
18
4
2
NOTE : The Tolerance for the outside diameter of an outer ring flange D1 is h9 (See ISO 286)
Inch Value in 0.0001 inch
mm Value in 0.001 mm
Over Including High HighLow Low
-
4
-
(101.6)
4
6
101.6
152.4
+40
+60
+102
+152
0
-60
0
-152
+40
+80
+102
+152
0
-40
0
-102
d D T1s D T2s
TABLE 5.4.2 OUTER RING OUTSIDE DIAMETER, OUTER RING WIDTH AND ASSEMBLED BEARING RUNOUTS
TABLE 5.4.3 EFFECTIVE WIDTH OF SUB-UNIT, TOLERANCE CLASS 4 (Normal Tolerance Class)
17
5.5 Chamfer Dimensions Limits For Roller Bearings(AS PER ISO : 582 / IS:5934)
d = bearing bore diameter, nominal
D = bearing outside diameter, nominal
r = smallest permissible single chamfer dimension (minimum limit)s min
r = largest permissible single chamfer dimension (maximum limit)s max
r = largest permissible single shaft housing fillet radiusas max
Cone (d) or Cup (D) back face chamfer
d or D r maxs
r mins > < radialdirection
axialdirection
0.3 -
40
40
-
0.7
0.9
1.4
1.6
0.6 -
40
40
-
1.1
1.3
1.7
2
1.0 -
5050
-
1.6
1.9
2.5
3
1.5 -
120
250
120
250
-
2.3
2.8
3.5
3
3.5
4
2
-
120
250
120
250
-
2.8
3.5
4
4
4.5
5
2.5
-
120
250
120
250
-
3.5
4
4.5
5
5.5
6
3
-
120
250
400
120
250
400
-
4
4.5
5
5.5
5.5
6.5
7
7.5
4
-
120
250
400
120
250
400
-
5
5.5
6
6.5
7
7.5
8
8.5
6 -
180180
-
7.5
9
10
11
5 -
180180
-
6.5
7.5
8
9
Dimensions in Millimetres
TABLE 5.5.1 TAPERED ROLLER BEARINGS
Dimensions in Millimetres
TABLE 5.5.2 RADIAL BEARINGS EXCEPTTAPERED ROLLER BEARINGS
0.3 -
40
40
-
0.6
0.8
1
1
0.6 -
40
40
-
1
1.3
2
2
1 -
5050
-
1.5
1.9
3
3
1.1 -
120120
-
2
2.5
3.5
4
2
-
80
220
80
220
-
3
3.5
3.8
4.5
5
6
2.5
-
100
280
100
280
-
3.8
4.5
5
6
6
7
d or D r maxs
r mins > < radialdirection
axialdirection
1.5 -
120120
-
2.3
3
4
5
2.1 -
280280
-
4
4.5
6.5
7
3 -
280280
-
5
5.5
8
8
4 - - 6.5 9
18
Circular arc (radius r min) beyondswhich no ring material may project
Ring bore or outsideCylindrical surface
r min.s
r max.s(Axial direction)
Ring foce
r m
in.
s
r m
ax.
s
(Rad
ial d
irect
ion)
Symbols
Dimensions in Millimetres
TABLE 5.5.3 THRUST BEARINGS
r minsr maxs
radial and axial direction
0.05
0.08
0.1
0.15
0.2
0.3
0.6
1
1.1
1.5
2
2.1
3
4
5
6
0.1
0.16
0.2
0.3
0.5
0.8
1.5
2.2
2.7
3.5
4
4.5
5.5
6.5
8
10
Dimensions in Millimetres
TABLE 5.5.4 RADIAL BEARINGS EXCEPT TAPEREDROLLER BEARINGS AND THRUST BEARINGS
r noms r mins
0.1
0.15
0.2
0.3
0.4
0.5
1
1.5
2
2.5
3
3.5
4
5
6
8
10
12
15
18
22
0.05
0.08
0.1
0.15
0.2
0.3
0.6
1
1.1*
1.5
2
2.1*
3
4
5
6
7.5
9.5
12
15
19
* In ISO :582-1972 the rs min values were 1 and 2 mm respectively.
Dimensions in Millimetres
TABLE 5.5.5 TAPERED ROLLER BEARINGS
r nom
0.5
1
1.5
2
2.5
3
3.5
4
5
6
Cup back face chamfer Cup back face chamfer
r mins r mins(ISO 582-1972)
r mins r min*s(ISO 582-1972)
0.3
0.6
1
1.5
2
2.5
3
4
5
6
0.3
0.6
1
1
1.5
2
2
3
4
5
0.3
0.6
1
1.5
1.5
2
2.5
3
4
5
0.3
0.6
1
1
1.5
2
2
3
4
5
Comparison between nominal chamfer dimension & minimum chamfer limits
19
20
5.6 Basic Tapered Bore, Taper 1:12
The normal taper angle (half the cone angle): = 2°23'9.4" = 2.385 94 =0.041 643 rad
The basic diameter at the theoretical large end of the bore : d=d+1/12B
The tolerances for a tapered bore, taper 1 :12 comprisea)a mean diameter tolerance, given by limits for the actual mean diameter deviation at the theoretical small end of the bore, dmp
b)a taper tolerance diameter, given by limits for the difference between the actual mean diameter deviations at the two ends of the bore, d1mp- dmp; andc)a tolerance for the diameter variation, Vdp' given by a maximum value applying in any radial plane of the bore
D
D D
Normal Tolerance
10
18
30
50
80
120
180
250
315
400
500
630
800
1,000
1,250
1,600
+22
+27
+33
+39
+46
+54
+63
+72
+81
+89
+97
+110
+125
+140
+165
+195
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
+15
+18
+21
+25
+30
+35
+40
+46
+52
+57
+63
+70
+80
+90
+105
+125
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
9
11
13
16
19
22
40
46
52
57
63
70
––
––
––
––
10
18
30
50
80
120
180
250
315
400
500
630
800
1,000
1,250
Table 5.6 Tolerance and allowable values (Class 0) oftapered hole of radial bearings
Over Including High HighLow Low Max.
d(mm)
D dmp D d1mp-D dmp Vdp
Unit mm
d d1
BB
2 d + D dmpd1
+
B
2 D dmpd1+d1+D d1mp
Theoretical tapered holeTapered hole having dimensionaldifference of the average borediameter within the flat surface
6. BEARING INTERNAL CLEARANCE
Bearing Internal clearance (Initial clearance) is the amount of internal clearances, a bearing has before being installed on a shaft or on a housing as shown in figure when either the inner/outer ring is fix and the other ring is free to move. Displacement can take place either in axial/radial direction. This amount of displacement (Radially or Axially) is termed by internal clearance, and depending on the direction, is called the radial clearance or the axial internal clearance. When the internal clearance of a bearing is measured, a slight measurement load is applied to the race ways so the internal clearance may be measured accurately. However, at this time, a slight amount of elastic deformation of the bearing occurs under the measurement load, and the clearance measurement value is slightly larger than the two clearances. This discrepancy between the two bearing clearances and the increased amount due to elastic deformation must be compensated. These compensated values are given in Table below
TABLE: 6.1 ADJUSTMENT OF RADIAL INTERNALCLEARANCE OF DEEP GROOVE BALL BEARINGS BASED ON MEASURED LOAD
Radial clearance of the bearing is built up for following reasons :
1. Accommodate the reduction of clearance in a bearing due to interference for inner ring on the shaft or outer ring in the housing.
2. Accommodate the minor changes in the dimensions of parts without affecting the bearing performance.
3. Compensate for the differential expansion of the two rings when the inner ring of a bearing operates at a higher temperature than the outer ring.
4. It allows a slight misalignment between the shaft and the housing, and thereby prevents the premature failure of the bearing
5. It affects the end play of radial ball bearing, and also affects their capacity for carrying axial loads, the greater the radial clearance the greater the capacity for supporting axial load.
IMPORTANT Once ball and roller bearings are mounted and running, a small amount of radial internal or running clearance is normally desirable. In the case of bearings under radial load, quieter running is generally obtained when this clearance is minimum.
Radial bearings are made with following different ranges of radial internal clearance-C2, Normal, C3 and C4
C2 These bearings have the smallest amount of radial internal clearance. They should only be used where freedom from all shake is required in the assembled bearings and there is no possibility of the initial radial internal clearances being eliminated by external causes. Therefore, special attention must be given to the seating dimensions as the expansion of the inner ring or contraction of the outer ring may cause tight bearings. In this respect a C2 bearing should not be used unless recommended by us.
CN : This grade of radial internal clearance is intended for use where only one ring is made an interference fit, and there is no appreciable loss of clearance due to temperature difference. Ball and roller bearings for general engineering applications are usually of this clearance.
C3 : This grade of radial internal clearance should be used when both rings of a bearing are made an interference fit, or when only one ring is an interference fit but there is likely to be some loss of clearance due to temperature differences. It is the grade normally used for radial ball bearings that take axial loading but for some purposes even bearings with C4 clearance may be required.
C4 : Where there will be some loss of clearance due to temperature differences and both rings are interference fit, this grade of radial internal clearance is employed. One example of its use is in bearings for traction motors. Customers should always consult us before ordering bearings with this grade of radial internal clearance.
21
Unit µm
Radial ClearanceIncrease
MeasuringLoad
Nominal BoreDiameterd (mm)
over
10
18
50
incl.
18
50
200
N
24.5
49
147
C2
3-4
4-5
6-8
CN
4
5
8
C3
4
6
9
C4
4
6
9
(Kgf)
(2.5)
(5)
(15)
RadialClearance = d
d
d1
d2
Axial Clearance = d1+ d2
6.1 Internal Clearance Selection
The internal clearance of a bearing under operating
conditions (effective clearance) is usually smaller than the
same bearing's initial clearance before being installed and
operated.
Effective internal clearance :
The internal clearance differential between the initia!
clearance and the operating (effective) clearance (the
amount of clearance reduction caused by interference fits, or
clearance variation due to the temperature difference
between the inner and outer rings) can be calculated by the
following formula :
deff = d0-(df+dt)
where,
deff = Effective internal clearance( mm)
do = Bearing internal clearance (mm)
df = Reduced amount of clearance due to
interference (mm)
dt = Reduced amount of clearance due to
temperature differential of inner and outer
rings( mm)
Reduced clearance due to interference :
When bearings are installed with interference fits on shafts
and in housings, the inner ring will expand and the outer ring
will contract ; thus reducing the bearing's internal clearance.
The amount of expansion or contraction varies depending
on the shape of the bearing, the shape of the shaft or
housing, dimensions of the respective parts, and the type of
materials used. The differential can range from
approximately 70% to 90% of the effective interference.
dff = (0.70~0.90) Ddeff
where,
df = Reduced amount of clearance due to
interference (mm)
Dd = Effective interference (mm)eff
This is due to several factors including bearing fit,
the difference in temperature between the inner and outer
rings, etc. As a bearing's operating clearance has an effect
on bearing life, heat generation, vibration, noise, etc. ; care
must be exercised in selecting the most suitable operating
clearance.
Reduced internal clearance due to inner/outer ring
temperature difference :
During operation, normally the outer ring will be from 5° to 10°C cooler than the inner ring or rotating parts. However, if the cooling effect of the housing is large, the shaft is connected to a heat source, or a heated substance is conducted through the hollow shaft, the temperature difference between the two rings can be even greater.The amount of internal clearance is thus further reduced by the differential expansion of the two rings.
dt = a.DT.Do
where,
dt=Amount of reduced clearance due to heat differential -6 =Bearing steel linear expansion coefficient 12.5 x 10 /°C
DT=Inner/outer ring temperature differential (°C)Do=Outer ring raceway diameter (mm)Outer ring raceway diameter, D Value can be calculated by using formula as given below:For ball bearings and spherical roller bearings
Do= 0.20 (d +4D)
For roller bearings (except self-aligning) Do= 0.25 (d + 3D)
where, d = Bearing bore diameter (mm)D = Bearing outside diameter (mm)
22
Over Incl. Min. Max.
Bore diameterd
(mm)Group 2
(C2)
2.5
6
10
18
24
30
40
50
65
80
100
120
140
160
180
200
225
250
280
315
355
400
450
500
560
630
710
800
900
1000
1120
6
10
18
24
30
40
50
65
80
100
120
140
160
180
200
225
250
280
315
355
400
450
500
560
630
710
800
900
1000
1120
1250
Min. Max.
Group N(CN)
Min. Max.
Group 3(C3)
Min. Max.
Group 4(C4)
Min. Max.
Group 5(C5)
0
0
0
0
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
3
3
3
3
10
10
20
20
20
20
20
20
7
7
9
10
11
11
11
15
15
18
20
23
23
25
30
35
40
45
55
60
70
80
90
100
110
130
140
160
170
180
190
2
2
3
5
5
6
6
8
10
12
15
18
18
20
25
25
30
35
40
45
55
60
70
80
90
110
120
140
150
160
170
13
13
18
20
20
20
23
28
30
36
41
48
53
61
71
85
95
105
115
125
145
170
190
210
230
260
290
320
350
380
410
8
8
11
13
13
15
18
23
25
30
36
41
46
53
63
75
85
90
100
110
130
150
170
190
210
240
270
300
330
360
390
23
23
25
28
28
33
36
43
51
58
66
81
91
102
117
140
160
170
190
210
240
270
300
330
360
400
450
500
550
600
650
-
14
18
20
23
28
30
38
46
53
61
71
81
91
107
125
145
155
175
195
225
250
280
310
340
380
430
480
530
580
630
-
29
33
36
41
46
51
61
71
84
97
114
130
147
163
195
225
245
270
300
340
380
420
470
520
570
630
700
770
850
920
-
20
25
28
30
40
45
55
65
75
90
105
120
135
150
175
205
225
245
275
315
350
390
440
490
540
600
670
740
820
890
-
37
45
48
53
64
73
90
105
120
140
160
180
200
230
265
300
340
370
410
460
510
570
630
690
760
840
940
1040
1150
1260
TABLE 6.2 RADIAL INTERNAL CLEARANCE FOR DEEP GROOVE BALL BEARINGS WITH CYLINDRICAL BORE
Clearance value in microns
6.2 Radial Internal Clearance values as per ISO : 5753/IS:5935
6.2.1 Deep groove ball bearings
23
Over Incl. Min. Max.
Bore diameterd
(mm)Group 2
(C2)
-
10
24
30
40
50
65
80
100
120
140
160
180
200
225
250
280
315
355
400
450
10
24
30
40
50
65
80
100
120
140
160
180
200
225
250
280
315
355
400
450
500
Min. Max.
Group N(CN)
Min. Max.
Group 3(C3)
Min. Max.
Group 4(C4)
Min. Max.
Group 5(C5)
0
0
0
5
5
10
10
15
15
15
20
25
35
45
45
55
55
65
100
110
110
25
25
25
30
35
40
45
50
55
60
70
75
90
105
110
125
130
145
190
210
220
20
20
20
25
30
40
40
50
50
60
70
75
90
105
110
125
130
145
190
210
220
45
45
45
50
60
70
75
85
90
105
120
125
145
165
175
195
205
225
280
310
330
35
35
35
45
50
60
65
75
85
100
115
120
140
160
170
190
200
225
280
310
330
60
60
60
70
80
90
100
110
125
145
165
170
195
220
235
260
275
305
370
410
440
50
50
50
60
70
80
90
105
125
145
165
170
195
220
235
260
275
305
370
410
440
75
75
75
85
100
110
125
140
165
190
215
220
250
280
300
330
350
385
460
510
550
-
65
70
80
95
110
130
155
180
200
225
250
275
305
330
370
410
455
510
565
625
-
90
95
105
125
140
165
190
220
245
275
300
330
365
395
440
485
535
600
665
735
TABLE 6.3 RADIAL INTERNAL CLEARANCE OF CYLINDRICAL ROLLERBEARINGS (INTERCHANGEABLE)
6.2.2 Cylindrical Roller Bearings
24
Clearance value in microns
C1NA
Over Incl.
-
10
18
24
30
40
50
65
80
100
120
140
160
180
200
225
250
280
10
18
24
30
40
50
65
80
100
120
140
160
180
200
225
250
280
315
C2NA
TABLE 6.4 RADIAL INTERNAL CLEARANCE OF CYLINDRICAL ROLLERBEARINGS (NON-INTERCHANGEABLE)
Nominal Bore diameter
d(mm)
Bearing with cylindrical bore
C3NA C4NA C5NANA
315
355
400
355
400
450
Min Max.
5
5
5
5
5
5
5
10
10
10
15
15
15
20
20
25
25
30
10
10
10
10
12
15
15
20
25
25
30
35
35
40
45
50
55
60
30
35
45
65
75
85
Min Max.
10
10
10
10
12
15
15
20
25
25
30
35
35
40
45
50
55
60
20
20
20
25
25
30
35
40
45
50
60
65
75
80
90
100
110
120
65
75
85
135
150
170
Min Max.
20
20
20
25
25
30
35
40
45
50
60
65
75
80
90
100
110
120
30
30
30
35
40
45
50
60
70
80
90
100
110
120
135
150
165
180
135
150
170
200
225
255
Min Max.
35
35
35
40
45
50
55
70
80
95
105
115
125
140
155
170
185
205
45
45
45
50
55
65
75
90
105
120
135
150
165
180
200
215
240
265
225
255
285
295
330
370
Min Max.
45
45
45
50
55
65
75
90
105
120
135
150
165
180
200
215
240
265
55
55
55
60
70
80
90
110
125
145
160
180
200
220
240
265
295
325
295
330
370
360
405
455
Min Max.
-
65
65
70
80
95
110
130
155
180
200
225
250
275
305
330
370
410
-
75
75
80
95
110
130
150
180
205
230
260
285
315
350
380
420
470
455
510
565
520
585
650
1 For bearings with normal clearance, only NA is added to bearing numbers, Ex. NU305NA
25
Clearance value in microns
Bore diameterd
(mm)
Group 2(C2)
Group N(CN)
Group 3(C3)
Group 4(C4)
Group 5(C5)
Over Incl. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
2.5
6
10
14
18
24
30
40
50
65
80
100
120
140
6
10
14
18
24
30
40
50
65
80
100
120
140
160
1
2
2
3
4
5
6
6
7
8
9
10
10
15
8
9
10
12
14
16
18
19
21
24
27
31
38
44
5
6
6
8
10
11
13
14
16
18
22
25
30
35
15
17
19
21
23
24
29
31
36
40
48
56
68
80
10
12
13
15
17
19
23
25
30
35
42
50
60
70
20
25
26
28
30
35
40
44
50
60
70
83
100
120
15
19
21
23
25
29
34
37
45
54
64
75
90
110
25
33
35
37
39
46
53
57
69
83
96
114
135
161
21
27
30
32
34
40
46
50
62
76
89
105
125
150
33
42
48
50
52
58
66
71
88
108
124
145
175
210
Clearance value in microns
TABLE 6.5 DOUBLE ROW SELF ALIGNING BALL BEARINGS WITH CYLINDRICAL BORE
Bore diameterd
(mm)
Group 2(C2)
Group N(CN)
Group 3(C3)
Group 4(C4)
Group 5(C5)
Over Incl. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
18
24
30
40
50
65
80
100
120
140
24
30
40
50
65
80
100
120
140
160
7
9
12
14
18
23
29
35
40
45
17
20
24
27
32
39
47
56
68
74
13
15
19
22
27
35
42
50
60
65
26
28
35
39
47
57
68
81
98
110
20
23
29
33
41
50
62
75
90
100
33
39
46
52
61
75
90
108
130
150
28
33
40
45
56
69
84
100
120
140
42
50
59
65
80
98
116
139
165
191
37
44
52
58
73
91
109
130
155
180
55
62
72
79
99
123
144
170
205
240
Clearance value in microns
TABLE 6.6 DOUBLE ROW SELF ALIGNING BALL BEARINGS WITH TAPERED BORE
6.2.3 Double row self-aligning ball bearing
26
6.2.4 Double row self-aligning roller bearing
Bore diameterd
(mm)
Group 2(C2)
Group N(CN)
Group 3(C3)
Group 4(C4)
Group 5(C5)
Over Incl. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
14
18
24
30
40
50
65
80
100
120
140
160
180
200
225
250
280
315
355
400
450
500
560
630
710
800
900
18
24
30
40
50
65
80
100
120
140
160
180
200
225
250
280
315
355
400
450
500
560
630
710
800
900
1000
10
10
15
15
20
20
30
35
40
50
60
65
70
80
90
100
110
120
130
140
140
150
170
190
210
230
260
20
20
25
30
35
40
50
60
75
95
110
120
130
140
150
170
190
200
220
240
260
280
310
350
390
430
480
20
20
25
30
35
40
50
60
75
95
110
120
130
140
150
170
190
200
220
240
260
280
310
350
390
430
480
35
35
40
45
55
65
80
100
120
145
170
180
200
220
240
260
280
310
340
370
410
440
480
530
580
650
710
35
35
40
45
55
65
80
100
120
145
170
180
200
220
240
260
280
310
340
370
410
440
480
530
580
650
710
45
45
55
60
75
90
110
135
160
190
220
240
260
290
320
350
370
410
450
500
550
600
650
700
770
860
930
45
45
55
60
75
90
110
135
160
190
220
240
260
290
320
350
370
410
450
500
550
600
650
700
770
860
930
60
60
75
80
100
120
145
180
210
240
280
310
340
380
420
460
500
550
600
660
720
780
850
920
1010
1120
1220
60
60
75
80
100
120
145
180
210
240
280
310
340
380
420
460
500
550
600
660
720
780
850
920
1010
1120
1220
75
75
95
100
125
150
180
225
260
300
350
390
430
470
520
570
630
690
750
820
900
1000
1100
1190
1300
1440
1570
Clearance value in microns
TABLE 6.7 DOUBLE ROW SPHERICAL ROLLER BEARINGS WITH CYLINDRICAL BORE
27
Bore diameterd
(mm)
Group 2(C2)
Group N(CN)
Group 3(C3)
Group 4(C4)
Group 5(C5)
Over Incl. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
18
24
30
40
50
65
80
100
120
140
160
180
200
225
250
280
315
355
400
450
500
560
630
710
800
900
24
30
40
50
65
80
100
120
140
160
180
200
225
250
280
315
355
400
450
500
560
630
710
800
900
1000
15
20
25
30
40
50
55
65
80
90
100
110
120
140
150
170
190
210
230
260
290
320
350
390
440
490
25
30
35
45
55
70
80
100
120
130
140
160
180
200
220
240
270
300
330
270
410
460
510
370
640
710
25
30
35
45
55
70
80
100
120
130
140
160
180
200
220
240
270
300
330
270
410
460
510
370
640
710
35
40
50
60
75
95
110
135
160
180
200
220
250
270
300
330
360
400
450
490
540
600
670
750
840
930
35
40
50
60
75
95
110
135
160
180
200
220
250
270
300
330
360
400
450
490
540
600
670
750
840
930
45
55
65
80
95
120
140
170
200
230
260
290
320
350
390
430
470
520
570
630
680
760
850
960
1070
1190
45
55
65
80
95
120
140
170
200
230
260
290
320
350
390
430
470
520
570
630
680
760
850
960
1070
1190
60
75
85
100
120
150
180
220
260
300
340
370
410
450
490
540
590
650
720
790
870
980
1090
1220
1370
1520
60
75
85
100
120
150
180
220
260
300
340
370
410
450
490
540
590
650
720
790
870
980
1090
1220
1370
1520
75
95
105
130
160
200
230
280
330
380
430
470
520
570
620
680
740
820
910
1000
1100
1230
1360
1500
1690
1860
Clearance value in microns
TABLE 6.8 DOUBLE ROW SPHERICAL ROLLER BEARINGS WITH TAPERED BORE
28
7. LUBRICATIONWhy Bearing Should be lubricated ?
Lubrication is an essential requirement for the proper operation of bearings.The purpose of bearing lubrication is to prevent direct metallic contact between the various rolling and sliding elements. This is accomplished through the formation of a thin film of oil/grease on the contact surfaces.
The Advantages of lubrication
* Protects the bearing from rust & corrosion.* Protects the bearing from the foreign particles.* Minimizes the friction between the races & rolling
elements. * Reduces the friction arising out of elastic deformation of
rolling elements when under load.* Facilitates the smooth running of bearing by minimizing
noise.* Dissipates the heat from the bearing and helps to
distribute the frictional heat uniformly throughout the bearing, which gets generated during operation.
* Saves power losses by minimizing internal friction. * Helps the bearing to attain the required speed.* Helps to attain the anticipated life of the bearing.
Selection of lubricant:
* Small size bearings operating at high speed, low viscosity oil is used
* Large bearing carrying heavy load, lubricants with higher viscosity and additional additive properties may be used.
* The lubricant must have sufficient lubricating capacity at the prevailing temperature
* It must form a load sustaining lubricating film for prevailing load conditions.
* It must have the capacity to absorb water to a certain extent, without affecting the lubricating capacity wherever the application demands.
When the Lubricant quality and quantity is inadequate, it results in the cage failure, inadequate lubrication may heat up cage and may break down the ball pockets. Due to break down of the lubricating films on raceways and rolling element surfaces it may develop scoring marks, which lead to premature failure of the bearing.This condition may also result In the deformation of parts and when the bearing deformed parts rotate under load, sliding motion will take place instead of rolling motion and it ends up in premature bearing failure.
7.1 Types of Lubrication
7.1.1 Grease Lubrication
Grease type lubricants are relatively easy to handle & require only the simplest sealing devices and it also involves a minimum of design and maintenance requirements and thus offers an optimum economy. For these reasons, grease is most widely used lubricant for rolling bearings.Grease is a semi-solid lubricant consisting of base oil, thickener and additives
A. Base Oil :
Mineral oils or synthetic oils such as silicon diester oils and fluorocarbon oils are mainly used as the base oil for grease. The lubricating properties of grease depend mainly on characteristics of its base oil. Therefore greases with low viscosity base oil are best suited for low temperature and high speeds. High viscosity base oils are best suited for heavy loads.
B. Thickening Agents :
Thickening agents are compounded with the base oils to maintain the semi-solid state of the grease. There are several types of metallic soaps such as lithium, sodium & calcium and inorganic thickeners such as silica gel & bentonite and heat resisting organic thickeners such as polyurea and fluoric compounds.The various special characteristics of a grease, such as limiting temperature range, mechanical stability, water resistance, etc. depend largely on the type of thickening agent used. For example, a sodium based grease is generally poor in water resistance and lithium base greases are water repellent within the certain limits and may also be used in the case of moisture if corrosion inhibitors are added. Greases with betone, poly-urea and other non-metallic soaps as the thickening agent are generally superior in high temperature properties.
C. Additives :
Various additives are added to grease such as antioxidants, corrosion inhibitors and extreme pressure additives (EP Additives ) to improve various properties.EP additives are used in heavy load applications. For long use without replenishment, an antioxidant should be added.
D. Consistency:
Consistency indicate the stiffness and liquidity and expressed by a numerical index.Greases are divided into various consistency classes according to the NLGI (National Lubricating grease Institute Scale). The NLGI values for this index indicate the relative softness of the grease, the larger the number the stiffer the grease. It is mainly determined by the amount of thickening agent used and the viscosity of the base oil. For rolling bearing lubrication grease with the NLGI numbers of 1 ,2, & 3 are used.
Method GreaseLubrication
OilLubrication
Handling
Reliability
Cooling Effect
Seal Structure
Power loss
Environment Contamination
High speed rotation
oxoo
o
x
o
o
o
: Very Good o : Good : Fair x : Poor
Table 7.1 Lubrication methods and characteristics
29
E. Mixing Different Types of grease
In general, different brands and different kinds of grease must not be mixed because of the different additives they contain. Mixing grease with different types of thickeners may impair its composition and physical properties. However, if different greases must be mixed, at least greases with the same base oil and thickening agent should be selected. But even when the grease of the same base oil and thickening agent are mixed, the quality of the grease may still change due to difference in their additives.
Amount of Grease
The amount of grease used in any given situation will depend on the following factors : (1) Size & Shape of housing, (2) Space limitation, (3) Bearing's speed, (4) Operating Load, (5) Type of grease (6) Operating Conditions
As a general rule housing & bearing should be only filled with 30% to 60% of their capacities. Where speeds are high and temperature rise, needs to be kept to a minimum, reduced amount of grease should be used.
If excessive grease is used, oxidation and deterioration may cause lower lubricating efficiency. Moreover the standard bearing space can be found by following formula,
V = K. W. Where
3V : Quantity of bearing space open type (Cm ) K : Bearing Space Factor W : Mass of Bearing in Kg.
(Specific gravity of grease = 0.9)
Excessive amount of grease causes temperature rise which in turn causes the grease to soften and may allow leakage.
NLGIConsistency No.
Worked Penetration Working conditions
• For centralised greasing use• When fretting is likely to occur• For centralised greasing use• When fretting is likely to occur• For low temperature• For general use• For selected ball bearings• For high temperature• For general use• For selected ball bearings• For high temperature• For special use
355~385
310~340
265~295
220~250
175~205
0
1
2
3
4
TABLE 7.2 RELATIONSHIP BETWEEN CONSISTENCY AND APPLICATION OF GREASE
For smooth running (Low noise level)
Vertical Mounting
If outer ring rotation or centrifugal
force on bearing
High Temperature
Low Temperature
Contaminated Environment
•
•
•
•
•
•
Grease of penetration class 2
Grease with good adhesion properties of classes 3 & 4
Grease having additional quantity of thickener of class
2 to 4
Grease with Synthetic base oil and class of 3 & 4
Low viscosity grease with suitable oil of class 1 & 2.
Grease of class 3
•
•
•
•
•
•
Working condition Suitable Grease
TABLE 7.3 CRITERIA FOR SUITABLE GREASE SELECTION
For further detail you may contact our Technical Cell
30
1 2 3 Remove 160 Series Remove NU4 Series Remove N4 Series
In general, the permissible working temperature is limited by the degree of mechanical agitation to which the grease is subjected, and we shall be pleased to recommend suitable lubricants for varying conditions on receipt of necessary particulars
Before the bearings are set to work, they should be thoroughly charged with grease in such a manner as to ensure the efficient coating of all working surfaces. The housing should also be lightly packed with grease, it being important that a reserve supply of lubricant should be maintained in actual contact with the bearing to promote satisfactory and continuous lubrication. Over filling or cramming should, however, be avoided, for excessive greasing may cause overheating due to churning, and if two bearings are mounted in the same housing, they, for this reason, should be separated by distance pieces. If correctly applied, one charge of grease will last for a very long period, varying with the condition of working.
Grease Relubrication
Grease replenishment or exchange is required if the grease service life is shorter than the anticipated bearing life.The bearings are re-lubricated by means of grease guns through lubricating nipples. If frequent re-lubrication is required, grease pumps and volumetric metering units must be used.It is essential that the fresh grease displace the spent grease, so that the grease get exchanged, but overgreasing is prevented.Grease Relubrication QuantitiesRelubrication quantity L1 for weekly to yearly re-lubricating L1 = D.B.X (in grams)D = Outer dia of the bearing (mm) B = Width of the bearing (mm)
XWeekly : 0.0020Fortnightly : 0.0025Monthly : 0.0030Yearly : 0.004-0.005
Grease replenishment intervals can also be calculated by using following graph.This chart indicates the replenishment interval for standard rolling bearing grease when used under normal operating conditions.As operating temperature increases, the grease re-supply interval should be shortened accordingly.Generally, for every 10°C increase in bearing temperature,
Example : Find the grease lubrication interval for ball bearing 6205 with a radial load 1 .4 kN operating at 4800 r/min
Cr/Pr = 14/1 .4 kN = 10 from fig. 2 adjusted load fL is 0.98
From the bearing tables the allowable speed for bearing 6205 is 13000 r/min & numbers of revolutions at a radial load of 1.4 kN areno = 0.98x13000 = 12740 r/min therefore n/no = 12740/4800 = 2.6Using the chart in fig.3 locate the point corresponding to bore diameter d=25 mm on the vertical line for radial ball bearings. Draw a straight- horizontal line to vertical line I. After that draw a straight-line from that point (A in example) to a point on the line II which corresponds to the n /n value (2.6 in oexample). Point C, where this line intersects vertical line indicates the lubrication interval 'h' which is approximately 4500 hours.
31
TABLE 7.4 BEARING SPACE RATIO (K)
Bearing Type
Ball Bearings
NU-cylindrical RollerBearings
Tapered Roller Bearings
SphericalRoller Bearings
N-cylindrical RollerBearings
Retainer Type
Pressed Retainer 61
46
5036
5537
3528
Pressed RetainerMachined Retainer
Pressed RetainerMachined Retainer
Pressed RetainerMachined Retainer
Machined Retainer
K
1
2
3
above 80°C, the lubrication period is reduced by exponent"1/1.5".
C/PFig : Value of adjustment factor F depends on bearingL
1.0
0.9
0.8
0.7
0.6
0.5
5 6 7 8 9 10 11
400300200
10050403020107
Bearing bored mm
no/nII
Grease replacement limit h
III
200
100
5030
2010
200
100
50
3020
500300
500
200
100
50
3020
300
30 000
20 000
10 000
5 0004 000
3 000
2 000
1 000
500400
300
A
B
C
20.0
15.0
10.09.08.07.06.0
5.0
4.0
3.0
2.0
1.0
0.9
0.8
0.7
Ra
dia
l ba
ll be
arin
gs
Se
lf-alig
nin
g ro
ller b
ea
ring
s
Tap
ere
d ro
ller b
ea
ring
s
Cy
lind
rica
l rolle
r be
arin
gs
Th
rus
t ba
ll be
arin
gs
no : fLXAllowable rotational speed(dimensions table)
n : Operating rotational speed
32
TABLE 7.5
Grease name
Thickener
Base Oil
Dropping point (°c)
Operating temp.
Range (°c)
Rotational range
Mechanical stability
Water resistance
Pressure resistance
Remarks
Calcium grease(cup grease)
Calcium Soap
Mineral oil
80 to 100
-10 to +70
Low to medium
Fair to good
Good
Fair
Suitable for
application at Low
rotation speed &
under light load. Not
applicable at high
temperature
Sodium grease(fiber grease)
Sodium Soap
Mineral oil
160 to 180
0 to +110
Low to high
Good to excellent
Bad
Good to excellent
Liable to emulsify in
the presence of
water. Used at
relatively high
temperature.
Lithium grease
Lithium Soap
Synthetic oil
(diester oil)
170 to 230
-50 to +130
High
Good to excellent
Good
Fair
Mineral oil
170 to 190
-30 to +120
Medium to high
Excellent
Good
Good
Most
widely
usable for
various
rolling
bearings
Synthetic oil
(Silicon oil)
220 to 260
-50 to +180
Low to medium
Good
Good
Bad to fair
Superior, High &
low
temperature
characteristics.
Superior Low,
Temperature & friction
characteristics.
Suitable for
bearings for measuring
instruments & extra
small ball bearings
for small electric
motors.
Grease name
Thickener
Base Oil
Dropping point
(C)
Operating
Temp. Range
(C)
Rotational
Range
Mechanical
Stability
Water
Resistance
Pressure
Resistance
Remarks
Lithium Complex
Soap
Mineral Oil
250 or Higher
-30 to +150
Low to High
Good to Excellent
Good to Excellent
Good
Calcium
Complex Soap
Mineral Oil
200 to 280
-10 to +130
Low to Medium
Good
Good
Good
Complex Base Grease Non-Soap Base Grease
Superior
pressure
resistance
when extreme
pressure agents
is added. Used
In bearings for
rolling mills.
Bentone
Mineral Oil
-
-10 to +150
Medium to High
Good
Good
Good
Urea Compounds
Mineral Oil/Synthetic Oil
240 or higher
-30 to +150
Low to High
Good to Excellent
Good to Excellent
Good to Excellent
Fluorine Compunds
Synthetic Oil
250 or Higher
-40 to +250
Low to Medium
Good
Good
Good
Superior
mechanical
stability and
heat resistance.
Used at
relatively high
temperature.
Suitable for
application at high
temperature &
under relatively
heavy load
Superior water
resistance, oxidation
stability, and heat
stability. Suitable for
application at high
temperature & high
rotation speed.
Superior chemical
resistance and solvent
resistance. Usable
upto 250 °C.
33
TYPE OFLUBRICATING
OIL
HIGHLYREFINED
MINERAL OIL
MAJOR SYNTHETIC OILS
DIESTER OIL SILICON OIL POLYGLYCOLICOIL
POLYPHENYLETHER OIL
FLOURINATEDOIL
OperatingTemp. range(C°)
-40 to +150 -55 to +150 -70 to +350 -30 to +150 0 to +330 -20 to +300
Lubricity Excellent Excellent Fair Good Good Excellent
Oxidationstability Good Good Fair Fair Excellent Excellent
Radioactivityresistance
Bad Bad Bad to Fair Bad Excellent ---------
Suitability forHigh Loads
Very Good Good Poor Very Good Very Good Good
With regard to operating temperature & lubrication, the following table lists the required oil visocisty for differenttypes of rolling bearings.
Remarks : 1mm²/s = 1 cSt (Centistokes)
Amount of oil : When oil bath lubrication is used and a bearing mounted with its axis horizontal, oil should be added until the static oil level is at the center of the lowest bearing rolling element. For vertical shaft, add oil to cover 50% to 80% of the rolling element.
Bearing Type Dynamic Viscosity (mm²/s)
Ball bearings, Cylindrical roller bearings, Needle roller bearings
Spherical roller bearings, Tapered roller bearings, Needle roller thrust bearing
Self-Aligning roller thrust bearings
13
20
30
7.1.2 OIL LUBRICATION :
! Oil lubrication is considered to be more effective than grease, provided proper sealing methods are employed to prevent the leakage.
! Only highly refined oil should be used as bearing lubricant.
OIL IS PREFERRED - WHERE
! Bearing speed is high! Operating temperature is considerably high! Dirt conditions are minimum! Sealing methods can be easily employed
TYPES OF OILS
! Natural oil! Synthetic oil
a) Diesters b) Silicon oil c) Fluorinated oild) Polyglycols e) Synthetic hydrocarbons
! Animal & Vegetable oils
TABLE 7.6 CHARACTERISTICS OF LUBRICATING OILS
7.2 Methods of Oil Lubrication
7.2.1 Oil bath lubricationThis method of lubrication is one of the most popular for slow and intermediate speed operation. This is referred to as "oil bath lubrication", because the bearing operates in an oil bath made by filling the housing with oil. Too much oil causes excessive temperature rise (through agitation) while too little oil may cause seizing. To assure proper lubrication it is sufficient that the oil level be kept around the center of bottom balls/ rollers of bearing in stationary condition. In the case of horizontal shaft, this level is determined when the bearing is idle. It is desirable to install an oil gauge so that the oil level can easily be checked when the bearing is idle. In the case of a vertical shaft, 50-80% of the ball / roller should be submerged when the bearing is idle. When more than two bearings are connected to a hosing, the bearing running at the bottom will generate heat unless it rotates at extremely low speed. For such cases, we recommend the use of some other lubrication method.
7.2.2 Splash lubricationThis is a lubrication method where, without direct submersion, oil is splashed by impellers attached to a shaft. This method is effective for fairly high speeds. One example, where splash lubrication is commonly used for bearings and gears is in a gear box where the gears may also be the splashing devices. In this case however, a shield plate should be installed or a magnet should be placed at the bottom of both to prevent worn grindings from the gears from possibly entering the bearings. Use of a conical rotating element in lieu of an impeller on a vertical shaft is effective in splashing oil, supplied by centrifugal force.
7.2.3 Drop-Feed lubrication This is a lubrication method where an oil pot or oil reservoir (usually called an "oiler") is installed at the upper portion of housing and oil drips from the oiler through a tiny hole of from a wick (through capillary action). The dripping oil is converted to fog or mist on collisions with the rotating shaft / bearing parts. This method is more effective for comparatively high speeds and light loads rather than medium loads. Although application capability is great irrespective of shaft mounting (vertical or horizontal) remember to top off the oiler before it runs dry.
34
7.2 Methods of Oil Lubrication
7.2.1 Oil bath lubricationThis method of lubrication is one of the most popular for slow and intermediate speed operation. This is referred to as "oil bath lubrication", because the bearing operates in an oil bath made by filling the housing with oil. Too much oil causes excessive temperature rise (through agitation) while too little oil may cause seizing. To assure proper lubrication it is sufficient that the oil level be kept around the center of bottom balls/ rollers of bearing in stationary condition. In the case of horizontal shaft, this level is determined when the bearing is idle. It is desirable to install an oil gauge so that the oil level can easily be checked when the bearing is idle. In the case of a vertical shaft, 50-80% of the ball / roller should be submerged when the bearing is idle. When more than two bearings are connected to a hosing, the bearing running at the bottom will generate heat unless it rotates at extremely low speed. For such cases, we recommend the use of some other lubrication method.
.
7.2.2 Splash lubricationThis is a lubrication method where, without direct submersion, oil is splashed by impellers attached to a shaft. This method is effective for fairly high speeds. One example, where splash lubrication is commonly used for bearings and gears is in a gear box where the gears may also be the splashing devices. In this case however, a shield plate should be installed or a magnet should be placed at the bottom of both to prevent worn grindings from the gears from possibly entering the bearings. Use of a conical rotating element in lieu of an impeller on a vertical shaft is effective in splashing oil, supplied by centrifugal force.
35
36
7.2.6 Spray lubrication (oil-mist lubrication)Filtered oil is blown through a lubrication sprayer (using dry compressed air), emerging in an atomized form and is fed into the housing for lubrication. This lubrication method is called "spray lubrication" or "oil-mist lubrication", which features low resistance of oil, high effectiveness of cooling and prevention of bearings from dust or water invasion due to high internal pressure associated with new oil feeding at all times. This method has often been used for bearings with comparatively light loads such as high speed main spindle bearings or grinding machines though it recently has become popular for bearings mounted on metal rolling mills. In cases of metal rolling mills, oil atomizing by heating high viscosity oil causes the bearing to raise its temperature. Therefore, care should be taken when selecting the bearing clearance. Because of continuous clean bearing operation and less risk of oil leakage, use of this lubrication method is expanding.
7.2.7 Jet lubrication (Forced feed atomizing)When a bearing is subject to high speed operation, the cage and balls act like a fan interfering with oil fed into the bearing. To cope with this phenomenon, a lubrication method called "Jet lubrication" is available. This method features highly pressurized oil lubrication (atomizing). In the most unfavorable conditions such as high speeds and high temperature, this method is one of the most reliable lubrication processes, dissipating any heat generated.Since oil has to be fed into bearings at high speed the spraying port should be as small as possible, though there is a high risk of seizing if dust and other foreign particles are entrapped at the nozzle port. Therefore, the nozzle port larger than 1 mm dia,
2applying pressure of 1-5kgf/cm is recommended so that the oil can be sprayed between the inner ring and the cage. Since a lot of oil is needed for this system, make the outlet ports of sufficiently large diameters and set them at both sides of the bearing.
F=FilterR=Pressure regulatorL=atomizerN=nozzle
F R
L
N
37
8. SEATINGS, LIMITS AND FITS
8.1 Seatings
Seatings for bearing rings must be parallel, circular and machined to their correct limits. Badly made seatings can distort thin section bearing rings, and thus reduce the efficiency and life of the bearings.
Shafts must be designed so that where rigid bearings are used, the slope at the bearings due to deflection is as small as possible. The permissible slope must vary with individual applications as it depends upon the operating conditions consequently limiting values are not listed. When experience is lacking on this point, our Technical Department will be pleased to give advice.
Housing must give adequate support to the outer ring of a bearing under load. If a housing distorts excessively, the outer ring will invariably distort as well, causing premature failure of the bearing. Where individual housing is used accurate alignment must be provided for rigid bearings.
Split housing should not be used unless absolutely necessary, since the joint between the cap and its base could distort the outer ring. If such housings are used, the two halves should be accurately doweled or registered before the bearing seating is machined. It is advisable to ensure that the cap can only be fitted one way round by suitably arranging the dowels or register.
Light alloy housings should be provided with substantial steel liners when :
! A bearing has to work under wide variation of temperature, as differential expansion between the seating and bearing materials affects the initial fit between these members.
! Heavy and/or shock loads are involved, for alloy seatings can quickly loose shape under such loading and give rise to serious trouble.
! The steel liners must be an interference fit in their housings at the temperature extremes anticipated, and beating seatings should be machined after the liners are fitted.
! When light alloy or other non ferrous seating are to be used, we advise consultation with our Technical Department about the seating limits to be adopted.
Seating Fits
It is very important that bearing seatings be machined to their correct limits, incorrect fits can cause tightness within the bearing or allow one or both of the bearing rings to creep, and affect the running accuracy and the assembly and disassembly of a machine.
Creep is slow rotation of one ring relative to its seating. It is undesirable since the shaft and the bore of the bearing or the housing and the outside diameter of the bearing become worn. Creep is not due to friction within a bearing but is generally caused by radial loads rotating or oscillating with respect to a fixed point on the ring under consideration. The only satisfactory way of preventing creep under such conditions is to make the affected ring an interference fit on its seating. Set-screws or key ways should not be used in an effort to prevent creep, for they quickly wear due to constant chafing, or can distort bearing- rings, causing local overload and rapid bearing failure. Also, clamping a ring endways does not normally prevent creep.
Ball Journal, Roller Journal, Angular Contact and Duplex Bearings
Rotating Rings (usually inner ring) should be made interference fit on their seating to ensure that they will not creep.
Stationary Rings (usually outer ring) need not be interference fit provided there are no out-of-balance or oscillating loads.
Some bearing rings must slide endways on their seatings and in such cases a sliding fit is essential, although excessive slackness should be avoided. For example, where two or more Ball Journal bearings, or Roller Journal bearings with non detachable rings are mounted on the same unit, the unlocated ring or rings should be free to move endways, otherwise the bearings that are adjusted endwise should also be made sliding fits. Where the stationary ring of Ball Journal, Angular Contact or Duplex Bearing is held endways, it is common practice to make the ring a sliding fit. In the case of Roller Journal bearings a transition fit is normally used. For Journal bearings light interference fits, however, are not detrimental provided the correct diametral clearance is used, and the seating fit adopted may well be governed by considerations of mounting, dismounting, and of rigidity.
If a stationary ring does creep, out-of-balance loading or out-of square mounting of one of the bearing rings must be suspected. Mounting errors should be corrected, and where out-of-balance loading exists the assembly should be dynamically balanced, static balancing not being enough. Where out-of balance loading can't be reduced to a low level, or where it is a function of the machine, an interference fit must be used on the stationary ring as well as on the rotating ring. In a bearing arrangement where interference fits are used on all rings, a bearing layout must be used in which there is no danger of the bearings being axially nipped one against the other.
38
8.2 Fits
The necessity of a proper fitIn some cases improper fit may lead to damage and shorten bearing life. Therefore, it is necessary to make a careful analysis while selecting a proper fit.
Some of the negative conditions caused by improper fit are listed below :! Raceway cracking, early pitting and displacement of
raceways! Raceway & shaft or housing abrasion caused by
creeping in fretting corrosion! Seizing caused by loss of internal clearance! Increased noise & lowered rotational accuracy due to
raceway groove deformation.
Selection of fits
Selection of proper fit depended upon thorough analysis of bearing operating conditions, including consideration of following factors :
(1) Condition of Rotation
Condition of rotation refer to the moving of bearing ring being considered in relation to the direction of load. There are 3 different conditions :
! Rotating load! Stationery load! Direction of load indeterminate
(2) Magnitude of the load
The interference fit of a bearing's Inner ring on its seating will be loosened with the increasing load, as the ring will expand under the influence of rotating load, & ring may begin to creep. So, if it is of shock character, greater interference is required.
The loss of interference due to increasing load can be estimated using the following equation :
When Fr is £ 0.3Cor Where Ddp = Interference decrease of inner ring(mm) d Fr
Ddp = 0.08 B d = Bearing Bore (mm)
When Fr is £ 0.3 Cor B = Inner Ring Width(mm) Fr = Radial Load (N)
Ddp = 0.02 Cor = Basic Static Load (N)
(3) Bearing Internal Clearance
! An interference fit of a bearing on the shaft or in housing means that ring is elastically deformed (expanded or compressed), and bearing's internal clearance reduced.
! The internal clearance and permissible reduction depend on the type and size of the bearing.
! The reduction in clearance due to interference fit can be so large that bearings with an internal clearance which is greater than normal have to be used.
! The expansion of the inner ring and contraction of outer ring can be assumed to be approximately 60 - 80 % of the interference, depending on the material of shaft and housing.
(4) Temperature Condition
Interference between inner ring & steel shaft is reduced as a result of temperature increase ( difference between bearing temperature and ambient temperature). This can result in an easing of fit of the inner ring on its seating. while outer ring expansion may result in increase in clearance.
The decrease of the interference of the inner ring due to this temperature difference may be calculated using following equation :
Ddt = 0.0015 d D TWhere Ddt = Required effective interference for
temperature difference mmDT = Temperature difference between bearing
temperature and ambient temperature °c. d = Bearing bore diameter mm.
(5) Running Accuracy Requirement
To reduce resilience and vibration, clearance fit should generally not be used for bearings, where high demands are placed on running accuracy.
(6) Design & Material of Shaft & Housing
The fit of a bearing ring on its seating must not lead to uneven distortion of the ring (out of roundness). This can be caused by discontinuity in the housing surface. Split housings are therefore not suitable where outer rings are to have an interference fit.
(7) Ease of Mounting & Dismounting
Bearings with clearance fit are usually easier to mount or dismount than those having interference fit. Where operating condition necessitate interference fit and it is essential that mounting & dismounting can be done easily, separable bearings or bearings with taper bore and adaptor or withdrawal sleeve may be used.
(8) Displacement of Non-Locating Bearings
If non-separable bearings are used as floating bearings, it is imperative that one of the bearing rings has to move axially during operation. This is ensured by adopting a clearance fit for that ring, which carries a stationary load, when the outer ring is under stationary load, so that axial displacement has to take place in the housing bore, a hardened intermediate bushing is often fitted to the outer ring.
(9) Effective Interference and finish of shaft & housing
Since the roughness of the fitted surface is reduced during fitting, the effective interference becomes less than the apparent interference. the amount of this interference decrease varies depending on roughness of the surfaces.
FrB( )
39
Normally, manufacturers assume the following interference
reductions :
For ground shaft : 1 Micron to 2.5 Micron
Machined Shaft : 5 Micron to 7 Micron
(10) Fitting Stress & Ring Expansion and Contraction
While calculating the minimum required amount of
interference, following factors should be taken into
consideration :
! Interference is reduced by radial load
! Interference is reduced by difference between bearing
temperature and ambient temperature
! Interference is reduced by variation of fitted surfaces
Important Details on Fits
! Maximum interference should not exceed the ratio of
1 : 1000 of shaft or outside diameter.
! Tight interference fits are recommended for :
(a) Operating conditions with large vibrations or shock
loads
(b) Application using hollow shaft of housing with
thin walls
(c) Application using housing made of light alloys
or plastic.
Loose interferences are recommended for :
(a) Application requiring high running accuracy
(b) Application using small size bearings or thin
walled bearings.
Shaft and housing material, geometry, hardness and surface
finish must be carefully controlled. Ground shafts should be
finished to 1 .3 micron Ra or better ; for turned shafts, a finish
of 2.5 micron Ra or better ; and housing bores should be
finished to 4 micron Ra or better.
To avoid shearing of aluminium and magnesium housing
during bearing installation, steel inserts should be used ;
alternatively special lubricants may be used for freezing and
heating to facilitate assembly. A minimum interference fit of
0.0015" and 0.001" per inch of diameter is required for
magnesium and aluminium housing respectively.
Where bearings are to be pressed onto a hollow shaft,
allowance must be made for contraction of the hollow shaft
in order to maintain the desired radial pressure.
THE NEI PRODUCT ENGINEERING DEPARTMENT
SHOULD BE CONSULTED FOR PROPER FITTING
PRACTICE ON ALL SPECIAL APPLICATIONS.
40
Unit mm
Unit mm
TABLE 8.1 FITTING AGAINST SHAFT
TABLE 8.2 FITTING AGAINST HOUSING
Numeric value table of fitting for radial bearing of 0 class (Normal class) for metric size
Ddmp
Nominal borediameter of
bearingd
(mm)
Over highIncl. low
g5 g6 h5 h6 j5 js5 j6
3
6
10
18
30
50
80
120
140
160
180
200
225
250
280
315
355
400
450
6
10
18
30
50
80
120
140
160
180
200
225
250
280
315
355
400
450
500
-8
-8
-8
-10
-12
-15
-20
-25
-30
-35
-40
-45
0
0
0
0
0
0
0
0
0
0
0
0
4T - 9L
3T - 11L
2T - 14L
3T - 16L
3T - 20L
5T - 23L
8T - 27L
11T - 32L
15T - 35L
18T - 40L
22T - 43L
25T - 47L
4T - 12L
3T - 14L
2T - 17L
3T - 20L
3T - 25L
5T - 29L
8T - 34L
11T - 39L
15T - 44L
18T - 49L
22T - 54L
25T - 60L
8T - 5L
8T - 9L
8T - 8L
10T - 9L
12T - 11L
15T - 13L
20T - 15L
25T - 18L
30T - 20L
35T - 23L
40T - 25L
45T - 27L
8T - 8L
8T - 9L
8T - 11L
10T - 13L
12T - 16L
15T - 19L
20T - 22L
25T - 25L
30T - 29L
35T - 32L
40T - 36L
45T - 40L
11T - 2L
12T - 2L
13T - 3L
15T - 4L
18T - 5L
21 - 7L
26T - 9L
32T - 11L
37T - 13L
42T - 16L
47T - 18L
52T - 20L
10.5T - 2.5L
11T - 3L
12T - 4L
14.5T - 4.5L
17.5T - 5.5L
21.5T - 6.5L
27.5T - 7.5L
34T - 9L
40T - 10L
46.5T-11.5L
52.5T - 12.5L
58.5T-13.5L
14T - 2L
15T - 2L
16T - 3L
19T - 4L
23T - 5L
27T - 7L
33T - 9L
39T - 11L
46T - 13L
51T - 16L
58T - 18L
65T - 20L
DDmp
Nominal borediameter of
bearingd
(mm)
Over highIncl. low
G7 G6 H7 J6 J7 Js7 K6
6
10
18
30
50
80
120
150
180
250
315
400
10
18
30
50
80
120
150
180
250
315
400
500
8
8
9
11
13
15
18
25
30
35
40
45
-
-
-
-
-
-
-
-
-
-
-
-
0
0
0
0
0
0
0
0
0
0
0
0
5L - 28L
6L - 32L
7L - 37L
9L - 45L
10L - 53L
12L - 62L
14L - 72L
14L - 79L
15L - 91L
17L - 104
18L -115L
20L -128L
0 - 17L
0 - 19L
0 - 22L
0 - 27L
0 - 32L
0 - 37L
0 - 43L
0 - 50L
0 - 59L
0 - 67L
0 - 76L
0 - 85L
0 - 23L
0 - 26L
0 - 30L
0 - 36L
0 - 47L
0 - 50L
0 - 58L
0 - 65L
0 - 76L
0 - 87L
0 - 97L
0 -108L
4T - 13L
5T - 14L
5T - 17L
6T - 21L
6T - 26L
6T - 31L
7T - 36L
7T - 43L
7T - 52L
7T - 60L
7T - 69L
7T - 78L
7T - 16L
8T - 18L
9T - 21L
11T - 25L
12T - 31L
13T - 37L
14T - 44L
14T - 51L
16T - 60L
16T - 71L
18T - 79L
20T - 88L
7.5 - 15.5L
9T - 17L
10.5T - 19.5L
12.5T - 23.5L
15T - 28L
17.5T - 32.5L
20T - 38L
20T - 45L
23T - 53L
26T - 61L
28.5T -68.5L
31.5T -76.5L
7T - 10L
9T - 10L
11T - 11L
13T - 14L
15T - 17L
18T - 19L
21T - 22L
21T - 29L
24T - 35L
27T - 40L
29T - 47L
32T - 53L
Unit mmTABLE 8.3 FITTING AGAINST SHAFT
Ddmp
Nominal borediameter of
bearingd
(mm)
Over Incl. high low
js6 k5 k6 m5 m6 n6 p6 r6
3
6
10
18
30
50
80
120
140
160
180
200
225
250
280
315
355
400
450
6
10
18
30
50
80
120
140
160
180
200
225
250
280
315
355
400
450
500
-8
-8
-8
-10
-12
-15
-20
-25
-30
-35
-40
-45
0
0
0
0
0
0
0
0
0
0
0
0
12T - 4L
12.5T - 4.5L
13.5T - 5.5L
16.5T - 6.5L
20T - 8L
24.5T - 9.5L
31T - 11L
37.5T-12.5L
44.5T-14.5L
51T - 16L
58T - 18L
65T - 20T
14T
15T
17T
21T
25T
30T
38T
46T
54T
62T
69T
77T
17T
18T
20T
25T
30T
36T
45T
53T
63T
71T
80T
90T
17T
20T
23T
27T
32T
39T
48T
58T
67T
78T
86T
95T
20T
23T
26T
31T
37T
45T
55T
65T
76T
87T
97T
108T
24T
27T
31T
38T
45T
54T
65T
77T
90T
101T
113T
125T
28T
32T
37T
45T
54T
66T
79T
93T
109T
123T
138T
153T
113T
115T
118T
136T
139T
143T
161T
165T
184T
190T
211T
217T
1T
1T
1T
2T
2T
2T
3T
3T
4T
4T
4T
5T
1T
1T
1T
2T
2T
2T
3T
3T
4T
4T
4T
4T
4T
6T
7T
8T
9T
11T
13T
15T
17T
20T
21T
23T
4T
6T
7T
8T
9T
11T
13T
15T
17T
20T
21T
23T
8T
10T
12T
15T
17T
20T
23T
27T
31T
34T
37T
40T
12T
15T
18T
22T
26T
32T
37T
43T
50T
56T
62T
68T
63T
65T
68T
77T
80T
84T
94T
98T
108T
114T
126T
132T
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Numeric value table of fitting for radial bearing of 0 class (Normal class) for metric size
Unit mm
TABLE 8.4 FITTING AGAINST HOUSING
DDmp
Nominal borediameter of
bearingd
(mm)
Over Incl. high low
K7 M7 N7 P7
6
10
18
30
50
80
120
150
180
250
315
400
10
18
30
50
80
150
180
200
250
315
400
500
8
8
9
11
13
15
18
25
30
35
40
45
0
0
0
0
0
0
0
0
0
0
0
0
10T
12T
15T
18T
21T
25T
28T
28T
33T
36T
40T
45T
15T
18T
21T
25T
30T
35T
40T
40T
46T
52T
57T
63T
19T
23T
28T
33T
39T
45T
52T
52T
60T
66T
73T
80T
24T
29T
35T
42T
52T
59T
68T
68T
79T
88T
98T
108T
13L
14L
15L
18L
22L
25L
30L
37L
43L
51L
57L
63L
8L
8L
9L
11L
13L
15L
18L
25L
30L
35L
40L
45L
4L
3L
2L
3L
4L
5L
6L
13L
16L
21L
24L
28L
1L
3L
5L
6L
8L
9L
10L
3L
3L
1L
1L
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
41
8.3 Limits and Fits Guideline TAPERED ROLLER BEARINGSAFBMA RECOMMENDED FITTING PRACTICE
Shaft and housing material, geometry, hardness and surface finish must be carefully controlled. Ground shafts should be
finished to 1.3 micron A.A. or better ; for turned shafts a finish of 2.5 mm A.A. or better ; and housing bores should be finished to 4 micron A.A. or better.
To avoid shearing aluminium and magnesium housing during bearing installation, steel inserts should be used ; alternatively special lubricants may be used for freezing and heating to facilitate assembly. A minimum interference fit is required for aluminium of 0.0010* per inch of diameter, for magnesium of 0.0015" per in of diameter.
Where bearings are to be pressed onto a hollow shaft, allowance must be made for contraction of the hollow shaft in order to maintain the desired radial pressure.
THE NEI PRODUCT ENGINEERING DEPARTMENT SHOULD BE CONSULTED FOR PROPER FITTING PRACTICE ON ALL SPECIAL APPLICATIONS.
Use
AutomotiveRotatingShafts
Pinion, transmissionrear wheels, crossshaft,
transfer case
Differential
Front wheels, full floating rear wheels
trailer wheels
AutomotiveStationary
Shafts
Application Fit Type
ConeBore
B*
ShaftDiameter
B*Fit
Upto 3" bore Above 3" bore
FitConeBore
B*
ShaftDiameter
B*
Adjustable cones +0.0005-0.0000
+0.0005+0.0000
0.0005T0.0005L
+0.0010-0.0000
+0.0015+0.0005
0.0015T0.0005L
Adjustable cones +0.0005-0.0000
-0.0002-0.0007
0.0002L0.0012L
+0.0010-0.0000
-0.0002-0.0012
0.0002L0.0022L
Non-Adjustable cones +0.0005-0.0000
+0.0015+0.0010
0.0015T0.0005T
+0.0010-0.0000
+0.0025+0.0015
0.0025T0.0005T
Non-Adjustable cones +0.0005-0.0000
+0.0025+0.0015
0.0025T0.0010T
+0.0010-0.0000
+0.0035+0.0025
0.0035T0.0015T
Use
Auto-motive
Differential
Rear wheels, trans-mission, cross shaft& other application
Front wheels, full floating rear wheels
pinion, differntial
Application Fit Type
Adjustable cups
Non-Adjustable cups
Non-Adjustable cups
42
CupO.D.D*
CupO.D.D*
CupO.D.D*
HousingBore
D*
HousingBore
D*
HousingBore
D*Fit Fit
3" to 5"O.D.Less 3" O.D. Above 5" O.D.
Fit
+0.0010-0.0000
-0.0015-0.0005
0.0025T0.0005T
+0.0010-0.0000
+0.0010-0.0000
-0.0020-0.0010
-0.0030-0.0010
0.0030T0.0010T
0.0040T0.0010T
+0.0010-0.0000
-0.0000+0.0010
0.0010T0.0010L
-0.0010-0.0000
-0.0010-0.0000
+0.0000+0.0010
-0.0000+0.0020
0.0010T0.0010L
0.0010T-0.0020L
+0.0010-0.0000
+0.0010+0.0020
0.0000L0.0020L
+0.0010-0.0000
+0.0010-0.0000
+0.0010+0.0020
-0.0000+0.0020
0.0000L0.0020L
0.0010T0.0020L
*D - Normal cup O.D., L - Loose, T - Tight
AFBMA AUTOMOTIVE TAPERED CUP FITTING PRACTICE.
AFBMA AUTOMOTIVE TAPERED CONE FITTING PRACTICE.
43
9. BEARING HANDLING 9.1 MountingRolling bearing is a very precise product and its mounting
deserves careful attention. The characteristics of this
bearing should be thoroughly studied, and it should be
mounted in the most appropriate manner. It is desired that
the assembly of the bearing be fully studied in the design and
assembly departments; and standards be established with
regard to following items :
1. Cleaning the bearing and related parts.
2. Checking the dimensions and finishing the related parts
3. Mounting tools.
4. Mounting methods.
5. Checking after mounting.
6. Amount of lubricant.
Mounting should be conducted carefully in accordance with
the specified standards. The rotating race (usually the inner)
must be made of an interference fit on its seat to prevent
"creep" or slow rotation of the race relative to the shaft or
housing on or in which it is mounted. It is also advisable to
clamp it firmly endways. The shoulders provided should be of
ample proportions to ensure a true abutment for the race, but
for standard roller bearings it should be relieved at about the
diameter of the roller track. In case of bearings fitted with
clamping sleeves and nuts it is necessary to see that these
nuts are tightened to the fullest extent, and it is an advantage
if the bearings are so fitted that the rotation of the shaft has a
tendency to tighten the nut on the sleeve. The importance of
rigidly fixing the race upon or in the revolving part cannot be
too strongly emphasised.
The stationary race ( usually the outer) should be a good fit in
its housing perfectly free from shake. A standard roller
bearing should be clamped endways to ensure that the
roller's track is in centre of the race. Deep groove ball bearing
if not locating the shaft, must be left free endways, having a
clearance of approximately one-third the total width of the
bearings. Angular contact bearings carry radial load and
thrust load in one direction but to maintain the balls in correct
contact with the tracks it is necessary for the thrust to be at
least equal to the radial load. Where this is not inherent in the
loading conditions another ball bearing must be fitted to
provide the balance of the required thrust. This is
automatically applied if the opposing bearing is adjusted to
take up the end play. Care is necessary to ensure that over
adjustment does not too heavily preload the bearings and in
this connection allowance should be made for any difference
in thermal expansion of shaft and housing.Where there is no definite end thrust the shaft mounted on
deep groove ball bearings may be located by clamping
endways the most lightly loaded bearings. With roller
bearings, location may be effected by a bearing having lips in
both races by plain faces, or by a ball locating bearing.Set screws, keys or similar devices for fixing the races should
be carefully avoided as they readily distort the rings and
cause over loading of the balls or rollers.Care should be taken to see that the shoulders between
which the races are clamped are square with shaft.Protection from dirt and moisture is most important.
PRACTICAL ADVICE
I. Storage
1. Store the bearings in a clean. dry place in their original
wrappings. This will preserve them from deterioration.2. Use older stock first.3. Do not stack too many bearings on top of each otherwise
the protective oil could be squeezed out from between the
bearing and its wrapping, thus leading to corrosion problem.
4. Also, never store large bearings upright but lay them flat.
II. Fitting
1 . Absolute cleanliness is essential when handling bearings.
They should not be removed from their wrappings until
required for fitting. A smooth metal-topped bench that can be
wiped clean is a great advantage. All tools, shaft, housings
and other components must be perfectly clean. If fitting
operations are delayed or interrupted, the assembly should
be wrapped with grease proof paper to exclude dirt and dust.
2. Bearing of about 11 inch outside diameter and large dia
are protected by heavy mineral jelly. Thus must be removed
before the bearings are used, and one method is to soak the
bearing in clean, hot mineral oil at a temperature not
exceeding 100°C.
3. All other bearing are usually coated with a rust
preventative oil, unless prelubricated and/or packed to suit
individual customer requirements. There is no need to
remove this oil unless :i) It is sufficient to cause serious dilution of the oil or grease
used in the bearing. This normally applies to smaller
bearings where the rust preventive oil represents a lagre
proportion of the required amount of lubricant.ii) Low torque is required.iii) A synthetic lubricant used that may not be compatible with
the protecting oil.
To remove the rust preventive oil, wash the bearings in a
good quality washing fluid ; white spirit or good quality
paraffin is suitable.Allow the bearings to drain thoroughly. Finally dry them, the
following being satisfactory methods :
44
i) Place the bearings in an oven or on a hot plate, a
temperature of 65-80°C should be adequate.
ii) Direct dry, clean, compressed air on the bearings. The
cage and rings of smaller bearings must be held firmly
otherwise a sudden blast of air would rapidly accelerate the
free bearing parts, this could cause the balls to skid, thus
damaging the highly finished internal surfaces of the
bearing.
4. The fits of the rings on their seatings are very important
Therefore ensure that the shaft and housing seatings are of
correct size and of good shape.
5. All shoulders must be smooth and square with the axis of
rotation.
6. Never drive one ring on its seating by blows on the other.
Such blows would irretrievably damage the balls or rollers
and raceways.
7. Apply pressure evenly around the rings. "A press is
better than a hammer."
8. Should a hammer be used, mild steel or brass tube of
suitable size, faced up square, should be interposed
between it and the bearing. This will distribute the force of the
blows (or rather taps), which should be given progressively
around the ring.
9. When the parts or a separable roller bearings are brought
together, the inner ring, the outer ring and the rollers must all
be square one with the other. If not square, then the rollers
would not slide freely, and force would have to be used to
bring the parts together. Such force would result in the rollers
and raceways becoming scored and this, in addition to
causing noisy running could cause early failure of the
bearing.
10.Where the ring of a bearing is against an abutment, make
sure it is tight home.
11. For heavy interference fits, inner rings may be shrunk on
to the seatings after heating in clean mineral oil at a
temperature of approximately 100°C: Be sure that the
bearing is in contact with the abutment shoulder after it has
cooled.
12. In this case of taper clamping sleeve and nut bearings,
the clamping nut must not be overtightened, for this could
expand the inner ring and eliminate all clearance within the
bearing, or even fracture the inner ring. We recommend that
when using pin spanners, having a length of approximately
five times the shaft diameter, one or two light hammer blows
should be given to the handle of the spanner after the nut has
been tightened as far as possible by hand pressure. This
should tighten the nut just sufficiently. It is a good practice.
If possible, to check that the sleeve is still clamped firmly to
the shaft after a few days running. As an additional
precaution we recommend that whenever possible, the
bearings are fitted so that the rotation of the shaft tends to
tighten the nut on the sleeve. To assist customers who use
torque spanners we recommend that the following torque be
applied to the clamping nut for light series bearings.
Shaft Diameter Torque on Nut
1"(25mm) 7.6 Kg.m
1 .5" (38 mm) 12.4 Kg.m
2" (50 mm) 17.25 Kg.m
3" (75 mm) 30.3 Kg.m
For medium series bearing we recommend that the above
figures be increased by approximately 50 percent.
Burr
9.1.2 Preparation Procedure
Contaminant
Remove any burrwith fine gradesand paper
Remove any dirtand contaminantswith a clean paper.
Apply light coating oil.
Contaminant
Burr
9.1.1 Bearing Mounting Procedure
Any burrs, cutting chips, rust or dirt should first be removed from the bearing mounting surfaces. Installation then be simplified if the clean surfaces are lubricated with spindle oil.
Burrs, dirt, and other contaminants that infiltrate the bearing before and during mounting will cause noise and vibrationand also in subsequent operation.
45
Burr
Cutting Cup
Burr
Cutting Cup
dSan
Paper
a eW
st
OIL
Mounting Procedure
46
Pressing Surface Surfaces with Zero pressingLoad Tolerances
Force applied toinner ring Force applied to outer ring
Force applied toouter ring
Force applied toinner and outer ringssimultaneously usingdriving plate
Force applied to inner ring
Force applied toinner and outer ringseparately
Mo
un
ting
on
Sh
aft
Mo
un
ting
in H
ou
sin
gS
imu
ltan
eo
us
Mo
un
ting
on
Sh
aft a
nd
in H
ou
sin
g
Shows inappropriate application of force to inner ring
47
9.1.3 Temperature Mounting
(Heat expansion of inner ring to ease installation)
Commonly used for large bearings and bearings with a heavy interference fit. 1. Immersion of the bearing in heated oil is the most
common method.Use clean oil and suspend the bearing in the oil with a wire or support it underneath using a metal screen in order to avoid uneven heating of bearing elements.
2. The temperature to which the inner ring should be heated depends upon the amount of interference fit i.e. the diameter of the interference fit surfaces. Refer to the following graph to determine the proper temperature.
3. To prevent gaps from occurring between the inner ring and shaft shoulder, bearings which have been heated and mounted on the shaft should be held in place until they have cooled completely.
Observe these precautions when heating bearings 1. bearings should never be heated over 120°C.2. This temperature mounting method cannot be used for
pre-greased and sealed bearings or shielded bearings.
Other heating methods
1. Bearing OvenBearings are dry. This method can also be used for pre-greased bearings.Do not heat the bearings above 120°C.
2. Induction HeatingThis method can also be used for the inner rings of cylindrical roller bearings. Bearings are dry and can be heated up in a short period of time. After using this method, administer a demagnetizing treatment to the bearing.
Pre-greasedbearings
Am
ou
nt
of
inn
er
rin
g b
ore
dia
me
ter
ex
pa
ns
ion
µ
m
Bearing bore diameter mm
Never exceedan oil temperatureof 120ºC!
Tem
pet
ure
i
e
ifr
en
ial
rar
sd
ft
od
hea
ed
beari
ng
t
s80°C
70°C
60°C
50°C
C
40°
30°C
r6
p6
n6
m6
k5
j5
280
260
240
220
200
180
160
140
120
100
80
60
40
20
280
260
240
220
200
180
160
140
120
100
80
60
40
20
50 100 150 200 250 300 250 400 450 500 550 600
Bearing Oven
48
9.2 Dismounting & Replacement
1. Unnecessary removal of a bearing should be avoided,
particularly where interference fits have been used. Removal
can damage the bearing and in some instances, cause
deterioration of the interference fit. Very often it is sufficient to
clean and relubricate the bearing in its fitted position.
Remove a bearing if you need to inspect it closely.
Symptoms that guide are the condition of the lubricant, the
bearing temperature and the noise level.
2. With Roller bearings there is sometimes a Ball location
bearing. This may be only a push fit on the shaft, and
therefore, facilitates easy dismantling.
3. In certain applications some form of extractor may be
necessary. This may act directly on the ring to be removed.
Never try to remove the inner ring by applying force on the
outer ring or vice versa.
4. Thrust bearings need offer no difficulty as push fits
should have been used, but take care to keep the rings
square or they will bend.
5. Worn shafts, housings and abutments must have
attention if creep has occurred. Knurling, scoring or
distortion of the seating on which creep has occurred must
not be resorted to simulate an interference fit. Such
deceptive practices are ineffective, for creep will very often
return all too quickly. Also, even if the ring is prevented from
creeping it will usually be distorted by the seating, with
bearing failure resulting from local overloading ofthe
raceways and of the balls or rollers.
6. When ordering replacements, be sure to give the
symbols marked on each of the rings of the bearing if any
doubt exists as to the correct bearing number. If a housing or
seating ring etc. is supplied with the bearing, please also
quote the marking on it. This is especially important for thrust
bearings with housings or seating rings, and for externally
aligning bearings. It is necessary to ensure that the correct
radial clearance is mentioned for ball and roller bearings
being ordered.
49
BEARING REMOVAL TOOLS & PROCEDURE
Wrong Correct
Soft metal
Soft MetalSoft Metal
Wrong Correct
Removal Using a Bearing puller
(a) (b)
Removal Using a spacer
50
9.3 Bearing Cleaning
It is seldom necessary to clean bearings with the sole object of removing the rust preventive oil, which they are coated before being packed. Rust preventives with a petroleum jelly base have certain lubrication qualities and in any case since the amount used for the protection of bearings is small, no harm is done with the grease or oil used for lubrication.As a rule washing shall only be resorted to when bearings have become dirty or when the mechanism in which they are used is so sensitive that even slight irregular resistance to rotation is not permissible. Cleaning media most commonly employed for used bearing are :(a) Benzene, (b) White Spirit (Low flash point), (c) Turpentine, (d) Paraffin Oil, (e) Light Spindle Oil, (f) Trichloro Ethylene, (g) Carbon Tetra Chloride; (h) Petroleum Ether
METHOD OF CLEANING
Rough cleaningIn Rough Cleaning a separate container should be used and to support the bearing a screen should be provided. All the cleaning media as mentioned above can be used for cleaning bearing, if bearing is very dirty, Gasoline should be used. Care should be taken to prevent igniting and to prevent rusting after cleaning.In rough cleaning, each bearing is moved about vigorously without rotating it, since any trapped foreign matter can scratch the rolling elements & tracks. If the oil is heated it cleans the bearing effectively. However, never heat the oil above 100°C. After as much as possible of the dirt has been removed this way, the bearing is transferred to the final cleaning.
Final cleaningNow bearing is submerged in clean oil & rotated gently the inner ring or outer ring so that inside of the bearing will also be cleaned. After that, rotate the bearing faster until all trace of dirt has been removed. Now remove the bearing from bath and wipe it with a clean cloth, apply a coat of rust preventive oil to the bearing and wrap it is not going to be used immediately. It is necessary to always keep rinsing oil clean.After any cleaning process it is necessary to protect the bearing by dipping it in hot petroleum jelly or oil, or by applying the grease to be used that it reaches every part of the surface. In the latter case rotation of bearings is necessary while grease is being applied.
!
Rough cleaning Final cleaning
51
9.4 Abutments for Bearings
1. Shaft and housing abutments for a ball or roller bearing
must be flat and square with the axis of rotation.
2. An abutment must be deep enough to clear the unground
corner radius of a bearing ring and contact its ground face.
3. The radius at the root of an abutment must be smaller than
the corner radius of the ring located against that abutment,
alternatively the root may be undercut.
4. The edge of an abutment must be reduced or chamfered,
as a burred edge can so easily dent or distort a bearing ring.
Ball Journal, Angular Contact and Duplex Bearings
When a bearing carries heavy axial load, abutments must be
deeper i.e. they should not extend beyond the inner ring
outside diameter or below the outer ring bore. A deep
abutment can cause difficulties when a bearing is removed
from its seating and, therefore, it is advantageous to provide
grooves or holes on such an abutment so that a suitable
extraction tool can be used.
RoIler Journal Bearings
Bearings not carrying axial loads or taking location duty
The maximum abutment depth is more important ring for
these bearings than for ball bearings, and maximum inner
abutment diameter and minimum outer ring abutment
diameter are recommended accordingly. Broadly these
coincide with the diameter of the inner and outer ring
raceways respectively.
Bearings carrying axial laods and taking location duty
Abutments for these bearings should extend beyond the
raceways to avoid shear stresses in the lips. Every possible
care is necessary to ensure that the abutments are flat and
square with the axis of rotation.
Thrust Bearings
Abutments for Thrust bearings should extend beyond the
pitch circle diameter of the balls to prevent the washers
dishing under load.
For standard Thrust bearings with one small bore washer
and one large bore washer, the approximate pitch circle
diameter
SmalI bore diameter + Large outside diameter = 2
In case of bearings with two bore washers, use the pitch
circle diameter for the same basic bearing size with one
large bore washer and one small bore washer as above
52
10. BEARING FAILURE 10.1 Why Bearings FailIn general, if rolling bearings are used correctly they wiil survive to their predicted fatigue life. However, they often fail prematurely due to avoidable mistakes. Failure of the rolling bearing can occur for a variety of reasons. Accurate determination of the cause of a bearing failure is must to make suitable recommendations for eliminating the cause.
The major factors that singly or in combination may lead to premature failure during service include incorrect mounting, excessive loading, excessive preloading, inadequate & insufficient lubrication, impact loading, vibrations, contamination, entry of harmful liquids.
It is difficult to determine the root cause of some of the premature failures. If all the conditions at the time of failure, and prior to the time of failure are known, including the application, operating conditions and environment, then by studying the nature of failure and its probable causes, the possibility of similar future failures can be reduced.
Two or more failure pattern can occur simultaneously and can thus be in competition with one another to reduce the bearing life. Also a pattern of failure that is active for one period in the life of a bearing can lead to or can even be followed by another failure mechanism, which then cause premature failure. Thus in some instances, a single failure pattern will be visible and in other indications of several failure pattern will be evident, making exact determination of root cause difficult. So when more than one bearing failure pattern has been occurred, proper analysis depends on careful examination of failed components. In contrast to fatigue life, this premature failure could be caused by :
(1) IMPROPER MOUNTING
(2) IMPROPER HANDLING
(3) POOR LUBRICATION ,
(4) CONTAMINATION
(5) EXCESSIVE HEATING
(6) EXCESSIVE LOAD
CAUSES OF OPERATING IRREGULARITIES IN A BEARING :
When certain irregularities are observed in a bearing, causes mentioned below should be checked and suitable corrective measures should be taken.(A) Noise :
Possible causes are :
(1) Contact of rotating parts
(2) Faulty mounting
(3) Insufficient / inadequate lubricant
(4) Abnormal load
(5) Improper internal clearance
(6) Sliding of rolling element
(7) Presence of contamination
(8) Corrosion
(9) Occurrence of flaking on raceways / rolling elements.
(10) Brinelling due to careless handling.
(B) Abnormal Temperature :
Possible causes are :
1 . Friction in bearing due to contact of rolling parts & seals.
2. Excessive amount of lubricant
3. Insufficient lubricant
4. Improper lubricant
5. Incorrect mounting
6. Excessive load on bearing
(C) VIBRATION :
Possible causes are :
1 . Occurrence of brinelling, flaking
2. Incorrect mounting
3. Existence of foreign objects
53
10.2 Bearing Damage and Corrective Measures
DESCRIPTION CAUSES COUNTER MEASURES
1. FLAKING
Abnormal excessive loadDeflection of misalignment ofshaftPoor LubricationIngress of foreign objects
**
**
Correct accuracy of shaft& housingImprove mounting &alignmentReview quantity & type of lubricantCarefully clean & handleshaft and housing
*
*
**
Non uniform dustribution oflubricantEtching
*
*
Uniform distribution of greaseReview the mounting procedureImprove operating conditions
***
Excessive preload* Correct the amount of preloadUse torque wrench to achieve correct preload
**
Excessive Axial loadInadequate lubricationContamination
***
Review applicationconditions.Review quantity & type of lubricantCarefully clean & handleshaft and housing
*
*
*
Foreign MatterImproper lubrication
**
Review type of lubricant& lubrication methodImprove sealing efficiency
*
*
Loss of clearanceInsufficient lubricationExcessive loadRoller Skew
****
Review fitting & bearingclearanceSelect a proper lubricant& feed it in proper quantityPrevent misalignmentImprove method of mounting
*
*
**
2. PEELING
3. SEIZURE
54
DESCRIPTION CAUSES COUNTER MEASURES
4. DISCOLOURATION
5. FRETTING CORROSION
6. DAMAGED RETAINERS
7. CRACKING
8. SMEARING
9. EXCESSIVE WEAR
Ingress of foreign objectsPoor lubricationTemper colour by overheatingDeposition of Deteriorated oil onsurface
****
Oil deposition should be removedby wiping with suitable solventSelect a proper lubricant& feed it in proper quantity
*
*
Minute clearance on fit surfaceSlight sliding during operation as a result reduced interference under a loadSwing with smaller amplitudeVibration during transportation
**
**
Fix shaft & housingIncrease interference Apply oilChange lubricantUse oil or high consistency greasewhen used for oscillation motion
*****
Excessive loadImpact loadImproper lubricationExcessive vibrationIngress of foreign objects
*****
Select a proper lubricant & feed it inproper quantityReview of application conditionsInvestigate shaft and housing rigidityCorrect the method of mounting & handling
*
***
Excessive impact loadExcessive loadExcessive interference fitBearing seat has larger corner radius than bearingSlipping of balls due to poor lubricationExcessive clearance during operation
****
*
*
Re-evaluate load conditionsCheck fits & bearing clearanceImprove the rigidity of shaft &housingCorrect the method of mounting &handling
***
*
Insufficient lubricationIngress of foreign objectsJamming of rolling elements in cagepocketsImproper mountingAngular movement of shaft whilebearings are stationary under loadExcessive slippage of the rolling elementsExcess axial load
***
**
**
Select a proper lubricant, quantity &methodReview the load conditionsImprove the sealingCorrect mounting faultsClean the shaft & housingSetting of a suitable preload
*
*****
Coarse/Fine matter in the bearing &acts as lapping agentsInsufficient lubricationRotational creep due to loose fitSkewing of RollersInner or outer ring out of square
*
****
Improve sealingCheck lubricant type & amountCheck shaft & housingCorrect mounting faults
****
55
DESCRIPTION CAUSES COUNTER MEASURES
10. CREEPING
11. CHIPPING
12. RUST & CORROSION
13. ELECTRICAL PITTING
14. ROLLERS SKEWING
Insufficient interference in the matingpartsInsufficient sleeve tighteningInsufficient surface pressure
*
**
Review the fitsReview the usageconditionsRedesign for greater rigidity
**
*
Impact of excessive loadPoor handlingIngress of solid objects
***
Improve handling Improve sealingReview applicationconditions
***
Improper storage, cleaningPoor packagingInsufficient rust inhibitorPoor rust preventionChemical action of lubricantPenetration by water, acid etc.
******
Improve storage & handlingImprove sealingPeriodically inspect thelubricating oilTake care when handlingthe bearing
***
*
Continuous passage of electric currentIntermittent passage of electric current
*
*
Create a bypass circuit for the currentInsulate the bearing so thatcurrent does not passthrough it.
*
*
Deformation or tilt ofbearing ring due to pooraccuracy of shaft or housingPoor rigidity of shaft orhousingDeflection of shaft due toexcessive clearance
*
*
*
Improvement in machiningaccuracy of shaft and housingImprovement in rigidity of shaft and housing.Employment of adequate clearance
*
*
*
56
Boundary Dimensions(mm)
Basic Load Rating(N)
DynamicC
StaticCo
Grease Oil
Limiting Speed(rpm)
263035242832374028323235424230353540424742424247475052556252424747525262627272
10
12
15
1617
20
2225
25.5
891168
10121279811131378
1012121489
1214
15.88141511161598
129
1512171719
BearingNumber
Abutment andFillet Dimensions
Masskg
(Approx.)
min.min. max.max.
0.30.60.60.30.30.61.01.00.30.30.30.61.01.00.30.30.30.60.61.00.30.60.61.00.61.01.11.11.01.00.30.30.60.61.00.61.11.11.1
455059806780289051006100970011400410056005600775011400960046506800680096001160013500740086509400
1370013700137001590015900234001590070508350
10000116001400019500213002120027100
1960264033201460239027504200500020602840284036005450455025803350335046005700655040004500505067006700670078507850
1220078504550510058506500785011300111001090014500
2900025000230002700026000220002000018000240002200022000190001700017000200002000020000180008000
1600016000150001800016000160001600014000140001000014000160001500015000140001300013500120001200010000
340003000027000320003000026000240002100028000260002600023000210002100024000240002400021000210001900018000180002100018000180001800017000175001200017000190001800018000170001500016000140001400012000
6000620063006901600162016301
61396369026002
1600262026302
BB10026903
1600360036203
6203A/426303
160049820460046204
BB10031838002
630420X55X11BB10636304/22
6905160056005
982056205
18380016305
SP72X25X17872489
13.516171516
17.518.517.5181919
20.5232120-
21232325242526282626
28.53739
28.529-
30.5313232353637
1214141414161716171717192019191919212122222224252424
26.53535
26.5272729
29.53030
31.53235
24253122262731
35.52630303137362833
32.53537413637384142424550574540454346465555
65.565
0.30.60.60.30.30.61.01.00.30.30.30.61.01.00.30.30.30.60.61.00.30.60.61.00.61.01.11.01.01.10.30.30.60.61.00.61.11.51.1
0.0190.0300.0530.0110.0210.0360.0610.0720.0160.0300.0250.0460.0840.0840.0180.0320.0390.0650.0780.1160.0490.0520.0690.1030.1200.1250.1470.1360.2540.1300.0420.0600.0780.0850.1290.1760.2250.3700.363
METRIC SERIES
d D B r dhDs R
11. BEARING TABLESSINGLE ROW RADIAL BALL BEARING
D
r
d
B
r R
dh
R
Ds
D
r
d
B
r R
dh
R
Ds
57
Boundary Dimensions(mm)
Basic Load Rating(N)
DynamicC
StaticCo
Grease Oil
Limiting Speed(rpm)
58687255555562729062627280
10080901107585
1001208090110100120110130120140125130
28
30
35
40
45
50
55
60
65
7075
16181813119
1619239
14172125182327161925291620272129223123332425
BearingNumber
Abutment andFillet Dimensions
Masskg
(Approx.)
min.min. max.max.
1.01.11.51.01.00.31.01.11.50.31.01.11.51.11.11.51.11.01.11.51.11.01.12.01.52.01.52.11.52.11.51.5
1790026700257001320013200112001950027100406001170016000257003340048300291004060061900210003270053000715002180035000619004340071500507008180057200921006220062100
975014000154008300830073501130014500228008200
10300154001920027800180002290038000151002050032000444001660023200380002930044400330005200040100598004410044900
12000110009800
13000130001300011000100007800
1200012000980088007800870078007000920078007000630084007100640064005800600054005500490051004800
14000130001100015000150001500013000120009200
140001400011000100009100
10000920082001100092008200740098008300750076006800700063006500580060005600
62/2863/28
72X28X186006
SP600616006620663066406
160076007620763076407620863086408600962096309640960106210631062116311621263126213631362146215
35.538.545.03737-
394340-
42454747515454
52.555.561.560
57.560
68.5677475
80.580.58685
90.5
3334.541.535353235
36.5383740
41.54343
46.54849507.5535455
56.5596364687173767883
5361.565.550505357
65.581.56057
65.57292
73.582
10170
78.59211175
83.510192111102119112129
116.5121.5
1.01.11.51.01.00.31.01.11.50.31.01.11.51.11.11.51.11.01.11.51.11.01.12.01.52.01.52.11.52.11.51.5
0.1710.2840.3500.1160.1000.0910.2010.3340.6980.1100.1540.2800.4570.9250.3570.5991.21
0.2370.4000.8251.5500.2620.4571.0650.5971.3720.7831.6890.9802.0911.0561.139
METRIC SERIES
d D B r dhDs R
SINGLE ROW RADIAL BALL BEARING
58
SINGLE ROW RADIAL BALL BEARING(SPECIAL BEARINGS)
Boundary Dimensions(mm)
DynamicC
StaticCo
Grease Oil
52
52
65
82
85
25
25
25
40
45
18
18
21.5
50
27
BearingNumber
Abutment andFillet Dimensions
min.min. max.max.
1.5
1.0
2.0
-
1.6
11500
11500
21300
29100
32500
6200
6200
9800
17200
19800
13000
13000
12000
8700
7800
15000
15000
14000
10000
9200
BB1004
BB1016
BB1014
BB1019
BB1005
30
30
32
-
51
47
46
56
-
70
1
1
1
-
1
d D B r dhDs R
Basic Load Rating(N)
Limiting Speed(rpm)
METRIC SERIES
B
DdBB1004
Dd
B
BB1005
B
DdBB1014
B
d DBB1019
Dd
B
BB1016
59
Boundary Dimensions Basic Load Rating(N)
DynamicC
StaticCo
Grease Oil
Limiting Speed(rpm)
22.225(0.8750)28.575
(1.1250)33.338
(1.3125)34.925
(1.3750)39.688
(1.5625)46.038
(1.8125)41.275
(1.6250)47.625(1.875)50.800
(2.0000)47.625
(1.8750)50.800
(2.0000)57.150
(2.2500)50.800
(2.0000)57.150
(2.2500)63.500
(2.5000)63.500
(2.5000)71.438
(2.8125)
9.525(0.3750)12.700
(0.5000)
15.875(0.6250)
19.050(0.7500)
22.225(0.8750)
25.400(1.0000)
28.575(1.1250)
5.556(0.2188)
6.350(0.2500)
9.525(0.3750)
7.144(0.2813)11.113
(0.4375)15.875
(0.6250)7.938
(0.3125)14.288
(0.5625)17.463
(0.6875)9.525
(0.3750)14.288
(0.5625)17.463
(0.6875)9.525
(0.3750)15.875
(0.6250)19.050
(0.7500)15.875
(0.6250)20.638
(0.8125)
BearingNumber
Abutment andFillet Dimensions
Masskg
(Approx.)
0.4(0.02)
0.4(0.02)
0.8(0.03)
0.8(0.03)
0.8(0.03)
1.6(0.06)
0.8(0.03)
1.6(0.06)
1.6(0.06)
0.8(0.03)
1.6(0.06)
1.6(0.06)
0.8(0.03)
1.6(0.06)
2.4(0.09)
1.6(0.06)
2.4(0.09)
2490
4030
6100
5550
9600
11600
7380
13700
15900
9400
12900
15330
10050
17700
21250
19450
27000
1110
2010
2750
2860
4550
5650
4000
6650
7850
5220
6800
8270
5900
9700
11050
11300
14350
32000
23500
20000
19000
19000
16000
16000
15000
14500
15000
14000
13000
14000
12500
12000
12000
10500
44000
27000
24000
23000
23000
18000
18000
18000
17000
18000
17000
15000
17000
15000
14000
14000
12500
S3
S5
LS5
S7
LS7
MS7
S8
LS8
MS8
S9
LS9
MS9
S10
LS10
MS10
LS11
MS11
12.7(0.5)17.5
(0.69)17.5
(0.69)20.6
(0.81)21.1
(0.83)23.1
(0.91)26.2
(1.03)25.9
(1.02)26.9
(1.06)30.2
(1.19)29.7
(1.17)30.2
(1.19)32.5
(1.28)33.3
(1.31)34.8
(1.37)38.1
(1.50)38.1
(1.50)
18.3(0.72)23.8
(0.94)29.5
(1.16)28.6
(1.13)34.8
(1.37)39.6
(0.56)35.7
(1.41)41.1
(1.62)43.7
(1.72)40.5
(1.59)44.5
(1.75)50.0
(1.97)42.9
(1.69)50.0
(1.97)54.4
(2.14)56.4
(2.22)61.5
(2.42)
0.3(0.01)
0.3(0.01)
0.5(0.02)
0.5(0.02)
0.5(0.02)
1.1(0.04)
0.5(0.02)
1.1(0.04)
1.1(0.04)
0.5(0.02)
1.1(0.04)
1.1(0.04)
0.5(0.02)
1.1(0.04)
1.6(0.06)
1.1(0.04)
1.6(0.06)
0.010
0.019
0.037
0.033
0.059
0.120
0.047
0.110
0.122
0.078
0.125
0.213
0.083
0.166
0.267
0.225
0.363
INCH SERIES
dmm
(inch)
Dmm
(inch)
Bmm
(inch)
rmm
(inch)
dh
mm(inch)
Ds
mm(inch)
Rmm
(inch)
SINGLE ROW RADIAL BALL BEARING
D
r
d
B
r R
dh
R
Ds
60
Boundary Dimensions Basic Load Rating(N)
DynamicC
StaticCo
Grease Oil
Limiting Speed(rpm)
69.850(2.7500)79.375
(3.1250)76.200
(3.0000)88.900
(3.2500)82.550
(3.2500)95.250
(3.7500)88.900
(3.5000)101.60
(4.0000)95.250
(3.7500)107.95
(4.2500)101.60
(4.0000)114.30
(4.5000)101.60
(4.0000)114.30
(4.5000)
31.750(1.2500)
34.925(1.3750)
38.100(1.5000)
41.275(1.6250)
44.450(1.7500)
47.625(1.875)
50.800(2.0000)
17.463(0.6875)22.225
(0.8750)17.463
(0.6875)22.225
(0.8750)19.050
(0.7500)23.813
(0.9375)19.050
(0.7500)23.813
(0.9375)20.638
(0.8125)26.988
(1.0625)20.638
(0.8125)26.988
(1.0625)20.638
(0.8125)26.988
(1.0625)
BearingNumber
Abutment andFillet Dimensions
Masskg
(Approx.)
1.6(0.06)
2.4(0.09)
1.6(0.06)
2.4(0.09)
2.4(0.09)
2.4(0.09)
2.4(0.09)
2.4(0.09)
2.4(0.09)
2.4(0.09)
2.4(0.09)
2.4(0.09)
2.4(0.09)
2.4(0.09)
17800
33300
20800
37200
25700
47700
27500
48300
35000
56250
48700
62100
48700
62100
11200
18000
13300
22050
16000
26700
18100
27750
23200
32700
31200
38500
31200
38500
10000
9200
10000
8600
9000
8000
8500
7600
8000
7000
7800
6700
7800
6700
13000
10500
12000
10000
10000
9500
10000
9000
9500
8300
9200
8000
9200
8000
LS12
MS12
LS12½
MS12½
LS13
MS13
LS13½
MS13½
LS14
MS14
LS14½
MS14½
LS15
MS15
41.4(1.63)43.7
(1.72)46.0
(1.81)47.8
(1.88)49.3
(1.94)50.8
(2.00)54.1
(2.13)56.6
(2.23)57.2
(2.25)59.4
(2.34)63.5
(2.50)65.0
(2.56)63.5
(2.50)65.0
(2.56)
62.7(2.47)69.1
(2.72)68.3
(2.69)76.2
(3.00)73.4
(2.89)82.6
(3.25)77.77(3.06)88.1
(3.47)87.1
(3.31)93.7
(3.69)92.2
(3.63)100.1(3.94)92.2
(3.63)100.1(3.94)
1.1(0.04)
1.6(0.06)
1.1(0.04)
1.6(0.06)
1.6(0.06)
1.6(0.06)
1.6(0.06)
1.6(0.06)
1.6(0.06)
1.6(0.06)
1.6(0.06)
1.6(0.06)
1.6(0.06)
1.6(0.06)
0.307
0.480
0.367
0.639
0.446
0.761
0.535
0.862
0.654
1.084
0.710
1.240
0.671
1.189
INCH SERIES
dmm
(inch)
Dmm
(inch)
Bmm
(inch)
rmm
(inch)
dh
mm(inch)
Ds
mm(inch)
Rmm
(inch)
SINGLE ROW RADIAL BALL BEARING
D
r
d
B
r R
dh
R
Ds
61
SINGLE ROW ANGULAR CONTACT BALL BEARING
Boundary Dimensions(mm)
Basic Load Rating(N)
DynamicC
StaticCo
Grease Oil
Limiting Speed(rpm)
40
47
72
90
120
110
110
17
20
35
40
45
50
60
12
14
17
23
29
27
22
BearingNumber
LoadCenter
a
MassKg.
(Approx.)
Abutment andFillet Dimensions
min.min. max.max.
1.0
1.0
2.0
2.0
2.0
2.0
2.0
9700
12700
29700
44250
80200
59180
45500
5380
7540
20050
29740
53650
45000
39300
15000
14000
8600
6900
4500
5600
5300
21000
18000
11000
9200
5800
7500
7000
7203
7204
7207
7308
7409
7310
7212
22
26
42
48.5
60
60
68.5
35
41
65
81.5
100
100
101.5
1.0
1.0
1.0
1.0
1.0
1.0
1.0
14.5
17
24
30.5
55.8
36.5
36
0.064
0.100
0.281
0.625
1.83
1.09
0.765
d D B r dhDs R
METRIC SERIES
a
D
r
d
B
rr
R
dh
R
Ds
62
SINGLE ROW ANGULAR CONTACT BALL BEARING
Boundary Dimensions Basic Load Rating(N)
DynamicC
StaticCo
Grease Oil
Limiting Speed(rpm)
152.40(6.0000)
152.40(6.000)
82.550(3.500)
26.988(1.0625)
53.975(2.125)
BearingNumber
Abutment andFillet Dimensions
LoadCenter
amm
(inch)
Masskg
(Approx.)
2.4(0.09)
2.4(0.09)
88400
176800
80100
155800
2600
2600
3500
3500
LS19½ACD
N4711C
100.0(3.94)
100.0(3.94)
134.0(5.28)
140.0(5.51)
--
--
2.0(0.08)
2.0(0.08)
73.6(2.90)
73.6(2.90)
2.27
4.54
INCH SERIES
dmm
(inch)
Dmm
(inch)
Bmm
(inch)
rmm
(inch)
dh
mm(inch)
d1
mm(inch)
Ds
mm(inch)
Rmm
(inch)
a
D
r
d
B
rr
a
2B
R
dh
R
Ds
R
d1
R
d
SINGLE ROW EXTERNALLY ALIGNING BALL BEARING
Boundary Dimensions Basic Load Rating(N)
DynamicC
StaticCo
Grease Oil
Limiting Speed(rpm)
BearingNumber
Abutment andFillet Dimensions
Masskg
(Appr.)
56250 32700 6500 900 MSN14 59.4(2.34)
110.0(4.33)
1.6(0.06)
1.70
INCH SERIES
11.7475(4.6250)
44.45(1.7500)
28.575(1.1250)
26.988(1.0625)
2.4(0.09)
dmm
(inch)
Dmm
(inch)
Bmm
(inch)
Hmm
(inch)
rmm
(inch)
dh
mm(inch)
Ds
mm(inch)
Rmm
(inch)
63
D d
r
H
B
dh DS
R
R
DOUBLE ROW SELF ALIGNING BALL BEARING
Boundary Dimensions(mm)
Basic Load Rating(N)
DynamicC
StaticCo
Grease Oil
Limiting Speed(rpm)
40
62
52
62
72
80
85
100
130
17
25
25
30
30
40
45
55
75
12
17
15
16
19
18
19
21
25
BearingNumber
MassKg.
(Approx.)
Abutment andFillet Dimensions
min.min. max.max.
0.6
2.0
1.0
1.0
2.0
2.0
2.0
2.0
2.0
7900
17250
12100
15600
20750
19700
21900
26800
38700
2010
5040
3300
4650
6300
6700
7350
10000
16000
14000
9100
11000
9200
7700
7100
6400
5300
3900
17000
11000
13000
11000
9100
8400
7500
6200
4600
1203
1305
1205
1206
1306
1208
1209
1211
1215
21
32
30
36
37
47
52
63.5
83.5
36
55
47
56
65
73
78
91.5
121.5
0.6
1.0
1.0
1.0
1.0
1.0
1.0
1.5
1.5
0.072
0.263
0.138
0.231
0.395
0.417
0.481
0.703
1.460
d D B r dhDs R
METRIC SERIES
64
D d
r
r
B
R
Dsdh
R
DOUBLE ROW SELF ALIGNING BALL BEARING
Boundary Dimensions Basic Load Rating(N)
DynamicC
StaticCo
Grease Oil
Limiting Speed(rpm)
BearingNumber
Abutment andFillet Dimensions
Masskg
(Approx.)
19150 5750 10700 14500 ULS12V 45.0(1.77)
61.2(2.41)
1.6(0.06)
0.324
INCH SERIES
69.850(2.750)
31.750(1.250)
17.460(0.688)
1.6(0.06)
dmm
(inch)
Dmm
(inch)
Bmm
(inch)
rmm
(inch)
dh
mm(inch)
Ds
mm(inch)
Rmm
(inch)
65
D d
r
r
B
R
Dsdh
R
DOUBLE ROW SELF ALIGNING BALL BEARINGS WITH TAPERCLAMPING SLEEVE AND NUT
Boundary Dimensions(mm)
Basic Load Rating(N)
DynamicC
StaticCo
Grease Oil
Limiting Speed(rpm)
52
62
80
85
100
130
20
25.4
31.75
38.10
50.80
63.50
15
16
18
19
21
25
BearingNumber
MassKg.
(Approx.)
Abutment andFillet Dimensions
min. max. max.min. max.
26
34
38
40
46
56
8.0
11.2
12.4
12.4
13.6
15.3
26.00
30.96
40.08
46.83
57.15
76.71
1.0
1.0
2.0
2.0
2.0
2.0
12100
15600
19700
21900
26800
38700
3300
4650
6550
7350
10000
16000
11000
9200
7100
6400
5300
3900
13000
11000
8400
7500
6200
4600
1205K
1206K
1208K
1209K
1211K
1215K
28
35
46
54
63
81
33
39
52
57
69
93
46
56
70
75
88
118
5
9
10
11
13.5
18
0.5
0.5
1.0
1.0
1.0
1.0
0.250
0.347
0.680
0.753
1.080
2.354
d D B L E H rdh S1Dt Du R
METRIC SERIES
66
HL
d D
EB
r
Du DtS1
dh
R
SPECIAL BEARING RACES
d
27
27.8
27.8
D
45
46.2
47.2
B
10.5
8
8
BB1006
BB1030
BB1031
d
24.2
25.0
30.0
D
39
48
48
B
8.65
5.5
5.5
BB1007
BB1058
BB1059
d
32
D
42.3
B
8BB1008
d
17.04
22.03
23.29
38.10
D
20.05
28.0
31.79
47.63
B
14.1
12.0
9.63
19.18
BB1009
RB5005
RB5003
RB5004
d
31
26
D
48
48
B
5.5
5.5
BB1060
BB1061
67
B
D
d
B
D
d
D
d
B45°
D
B
d
B
D
d
68
Double Row Angular Contact Bearing
DO O
d
B
Clutch Release Bearing
B
Belt Tensioners
Bearing No.Boundary Dimensions
d D B
Basic Load Rating(N)
Dynamic C Static Co
BB1066 36 68 33 42486 32624
JPU51-15
BB1079
-
-
51
51
30.4
32
9400
10100
5050
5850
Bearing No.Boundary Dimensions
d D B
Basic Load Rating(N)
Dynamic C Static Co
Bearing No.Boundary Dimensions
d D B
Basic Load Rating(N)
Dynamic C Static Co
1888180
1888451
306445C
50
45
50
91.6
86.6
81.6
29
28
25
35000
32700
21800
23200
20500
16600
DO
B
D dO O
Boundary Dimensions(mm)
Basic Load Rating(N)
DynamicC
StaticCo
Grease Oil
Limiting Speed(rpm)
25 52 15 1.0 29300 27700 13000 15000 NU205E 29 - 47 - 1.0 0.130
62 17 1.1 31500 27700 12000 14000 NU305 31.5 - 55.5 - 1.1 0.230
62 17 1.5 50000 48000 4000 5000 NJK305* 37.5 - 55.5 - 1.5 0.245
35 80 21 1.5 49500 47000 9000 11000 N307 - 43 - 73.5 1.0 0.464
80 23 - 76000 83000 8100 9600 NU307ENS 41.5 - 72 - 1.5 0.570
40 80 18 1.1 43800 43000 9400 11000 N208 46.5 46.5 73.5 - 1.1 0.372
80 18 1.1 55500 55500 8500 15000 NUP208E 46.5 - 73.5 - 1.1 0.384
90 23 1.5 72000 71000 8000 9400 N308 - 48 - 82 1.5 0.643
45 85 23 1.1 84000 96000 6800 8000 NU2209EN 52.5 - 78.5 - 1.0 0.540
100 25 1.5 79000 77500 7200 8400 NU309 54 - 82 - 1.5 0.857
100 25 1.5 79000 77500 7200 8400 NU309N 54 - 82 - 1.5 0.845
100 25 1.5 79000 77500 7200 8400 NF309 54 - 82 - 1.5 0.870
100 25 1.5 79000 77500 7200 8400 NJ309 54 - 82 - 1.5 0.886
100 25 1.5 79000 77500 7200 8400 NUP309N 54 - 82 - 1.5 0.898
50 90 23 1.1 67500 78500 6900 8100 NH2210 56.5 56.5 83.5 - 1.1 0.648
110 27 2.0 87000 86000 6500 7700 NUP310N 59 59 101 - 1.5 1.186
110 27 2.0 87000 86000 6500 7700 NU310 59 59 101 - 1.5 1.19
110 27 2.0 87000 86000 6500 7700 NJ310 59 59 101 - 1.5 1.140
55 100 21 1.1 61000 66500 6900 8200 NU211 61.5 - 92 - 1.1 0.638
100 21 1.1 61000 66500 6900 8200 NJ211 61.5 61.5 92 - 1.1 0.652
BearingNumber
Abutment andFillet Dimensions
METRIC SERIES
d D B r dh d1Ds D1 R
CYLINDRICAL ROLLER BEARING
69
Approx.mass(Kg.)
*Full complement Roller Bearing
D
B
d
r
r
D
B
d
r
r
d1 D1
R
R
dh Ds
R
R
TYPE NU TYPE NJ TYPE NUP TYPE N TYPE NF
CYLINDRICAL ROLLER BEARING
Boundary Dimensions(mm) Bearing
Number
120
130
130
130
150
170
180
180
200
220
220
220
260
260
280
280
320
400
460
469.9
530
600
670
700
215
230
250
250
270
360
320
380
360
400
400
350
400
400
380
500
480
650
680
698.5
710
830
980
930
58
79.4
80
80
88.9
72
108
75
120.65
65
108
98.4
65
65
100
165.1
121
145
218
139.7
180
150
308
160
3.5
5.0
4.0
4.0
6.0
5.0
3.0
5.0
8.0
5.0
5.0
2.5
5.0
5.0
3.5
3.6
5.0
8.0
8.0
6.0
6.0
6.0
10.0
8.0
NJ2224
NU5226M
RB5054
RB5055
NU5230M
N334
NU5236M
NJ336
NU5240
NJ244
NU2244
6943
NJ1052
NUP1052
NNU4956
NU5256
NN3064K
2032780
4202192
N1050
42629/530
327/600
N1009
327/700
366960
525400
524300
524300
728800
800000
987900
882800
1337000
763200
1156000
953500
790900
790900
697800
2915500
1349700
2544200
3686100
3300000
3244000
2917300
7120000
2972800
496200
776100
746700
746700
1103900
1020000
1552600
1123200
2229000
1086200
1852700
1649000
1159230
1159230
908000
5238800
2662800
4550000
8653050
6180000
8129200
6156500
10000000
6902500
8.76
14.00
18.90
18.90
22.00
38.70
37.00
44.20
53.70
38.00
59.00
35.00
30.90
31.70
31.70
139.0
74.00
196.0
269.0
190.0
220.0
245.0
780.0
300.0
METRIC SERIES
d D B r
Besic Load Rating(N)
DynamicC
StaticCo
MASSKg
(Approx.)
70
D
B
d
r
r
D
B
d
r
r
TYPE NU TYPE NJ TYPE NUP TYPE N TYPE NF
D
B B
d
r
r
Dd
r
r
BEARING WITHCYLINDRICAL
BORE
BEARING WITHTAPERED BORE
TAPER 1 : 12
71
Boundary Dimensions Basic Load Rating(N)
DynamicC
StaticCo
Grease Oil
Limiting Speed(rpm)
BearingNumber
Abutment andFillet Dimensions
Masskg
(Approx.)
31300 27300 12000 14000 RLS10 - 50.0(1.378)
1.0(0.04)
0.176
INCH SERIES
57.150(2.250)
25.40(1.000)
15.875(0.625)
1.07(0.04)
dmm
(inch)
Dmm
(inch)
Bmm
(inch)
rmm
(inch)
d1Ds Rmax.
35.0(1.378)
D1 dh
-
CYLINDRICAL ROLLER BEARING
D
B
d
r
r
d1 D1
R
R
TYPE N
72
SPECIAL BEARING ROLLER BEARING
dmm
(Inch)
26.993
(1.0627)
Dmm
(Inch)
50.782
(1.9993)
Bmm
(Inch)
17.4625
(0.6875)
BRG NO.
L3782
dmm
(Inch)
31.75
(1.25)
Dmm
(Inch)
79.350
(3.124)
Bmm
(Inch)
22.225
(0.875)
BRG NO.
N-1004
dmm
(Inch)
25.400
(1.000)
Dmm
(Inch)
53.967
(2.1274)
Bmm
(Inch)
28.575
(1.125)
BRG NO.
L064
D
B
d
dD
B
dD
DIA. OVERROLLERS
B
73
SPECIAL CYLINDRICAL ROLLER BEARING
Boundary Dimensions(mm)
BearingNumber
90
116
118
120
128
130
144.5
148
150
158
160
190
220
220
215
220
240
260
240
240
260
245
245
270
270
300
318
318
43
60
60
60
60
80
84
80
80
84
72
80
80
80
102
98
98
L5285
RB5034
RB5002
L6180
L5064
WJP120 x 240P
RB5066
WJP130 x 240P
WJP130 x 240PE
L5944
RB5024
RB5047
RB5044
L6205
WJP130 x 300P
RB5068
L5946
244000
374000
374000
374000
374000
550900
614500
480900
524300
615400
491000
544300
664500
664500
960150
887000
887000
269400
539900
539900
539900
539900
738100
837200
668600
746700
837200
721800
831300
926800
926800
1373700
1220800
1220800
d D B
Besic Load Rating(N)
DynamicC
StaticCo
Boundary Dimensionsmm
(Inch)
BearingNumber
Besic Load Rating(N)
107.95
(4.250)
139.70
(5.500)
203.20
(8.000)
254.00
(10.000)
57.15
(2.250)
71.438
(2.8125)
L6029
L6031
356600
553700
469200
745300
D
B
d
74
SPECIAL CYLINDRICAL ROLLER BEARING
Boundary Dimensions(mm)
BearingNumber
116
118
120
126
128
130
140
144.5
148
150
158
160
220
220
215
220
240
240
240
240
240
260
240
240
260
250
245
245
270
270
300
318
318
60
60
60
60
80
80
80
80
80
84
80
80
84
68
72
80
80
80
102
98
98
RB5033
RB5001
L6179
L5063
WJP120 x 240P
RB5006
RB5058
NBR102
RB5056
RB5065
WJP130 x 240
WJP130 x 240E
L5943
RB5017
RB5023
RB5046
RB5043
L6204
WJP130 x 300
RB5067
L5945
374000
374000
374000
374000
550900
480900
524300
480900
524300
614500
480900
524300
615400
459170
491000
544300
664500
664500
960100
887000
887000
539900
539900
539900
539900
738100
837200
668600
746700
837200
721800
831300
926800
926800
1373700
1220800
1220800
d D B
Besic Load Rating(N)
DynamicC
StaticCo
Boundary Dimensionsmm
(Inch)
BearingNumber
Besic Load Rating(N)
107.95
(4.250)
139.70
(5.500)
203.20
(8.000)
254.00
(10.000)
57.15
(2.250)
71.438
(2.8125)
L6028
L6030
356600
553700
469200
745400
D
B
d
75
Boundary Dimensions(mm)
BearingNumber
100
126
128
128
128
130
130
130
140
148
148
148
150
150
150
150
200
200
215
240
240
240
240
240
240
280
250
270
270
270
270
270
270
320
360
360
-
85
85
85
85
85
85
-
-
-
-
-
-
-
-
-
236
-
L4430
RB5059
NBR101
RB5007
RB5057
WJP130 x 240P
with spl. loose lip L5032
WJP130 x 240PE
L5284
RB5018
RB5062
RB5063
RB5064
RB5020
RB5021
RB5022
L4023
L6207
L6019
298700
524300
480900
480900
524300
480900
524300
628000
459200
664500
664500
664500
664500
664500
664500
-
1567500
906400
II
I
I
I
I
I
I
V
II
V
IV
IV
V
IV
IV
V
VI
III
3314500
746700
668600
668600
746700
668600
746700
753460
657900
926800
926800
926800
926800
926800
926800
-
2741500
1370800
d D B
Besic Load Rating(N)
Type
DynamicC
StaticCo
SPECIAL CYLINDRICAL ROLLER BEARING
B B
Dd
w
D da
w
B
D d
B
D da
B
D d dD
B B
W
TYPE - I TYPE - II TYPE - III TYPE - IV TYPE - V TYPE - VI
D
B
d
r
r
D
B
d
r
r
TYPE NU TYPE NJ TYPE NUP TYPE N TYPE NF
76
Boundary Dimensions(mm)
BearingNumber
90
100
120
130
140
150
180
190
190
190
215
215
215
260
260
260
280
300
320
380
43
43
43
47
47
47
55
55
55
58
62
65
75
NH318
NUP318
NU318
NU320
NH320
NJ320
NH324
NJ324
NU324
NU326
NU328
NU330
NU336
240000
380000
475000
560000
665000
800000
905000
265000
425000
55000
665000
745000
985000
1150000
d D B
Basic Load Rating(N)
DynamicC
StaticCo
SPECIAL CYLINDRICAL ROLLER BEARING
FOR TRACTION MOTOR APPLICATION
12
-
-
-
13
-
14
-
-
-
15
-
-
-
a
77
Boundary Dimensions Basic Load Rating(N)
DynamicC
StaticCo
Grease ConeOil Cup
Limiting Speed(rpm)
BearingNumber
17700
22400
29000
40100
40100
41700
48400
48400
44700
27400
46100
48400
60100
48400
17800
23000
29500
41700
41700
46900
57000
57000
47400
31800
53000
57000
73700
57000
8700
9000
8900
8000
8000
6100
6100
6100
5700
7400
6700
6100
5300
6100
11590
LM11749
LM11949
M12644
M12649
N1005
15100S
15100S
23100
L44649
1988
15112R
02872
15117
112000
13000
12000
11000
11000
8200
8200
8200
7600
9900
8900
8200
7000
8200
11520
LM11710
LM11910
M12611
M12610
N1005
15250X
15245
23256
L44610
1922
15245
02820
15245
SINGLE ROW TYPE
INCH SERIES
42.862(1.6875)
39.878(1.5700)
45.237(1.7810)
49.225(1.9380)
50.005(1.9687)
62.000(2.4410)
63.500(2.5000)
62.000(2.4410)
65.088(2.5625)
50.292(1.9800)
57.150(2.2500)
62.000(2.4410)
73.025(2.8750)
62.0000(2.4410)
15.875(0.6250)
17.462(.6875)
19.050(0.7500)
21.430(0.8437)
25.00(0.9843)
25.400(1.0000)
26.988(1.0625)
28.575(1.1250)
29.985(1.1805)
14.288(0.5625)
13.843(0.5450)
15.494(0.6100)
18.034(0.7100)
17.526(0.6900)
20.638(0.8125)
20.638(0.8125)
19.050(0.8750)
22.225(0.8750)
14.224(0.5600)
19.845(0.7813)
18.161(0.7150)
22.225(0.8750)
19.050(0.7500)
1.5(0.06)
1.3(0.05)
1.3(0.05)
1.3(0.05)
1.3(0.05)
1.5(0.06)
1.5(0.06)
1.3(0.05)
1.5(0.06)
1.3(0.05)
1.5(0.06)
1.3(0.05)
3.3(0.13)
1.3(0.05)
dmm
(inch)
Dmm
(inch)
Tmm
(inch)
rmm
(inch)
SINGLE ROW TAPERED ROLLER BEARING
14.288(0.3750)
14.605(0.5750)
16.637(0.6650)
19.050(0.7500)
18.288(0.7200)
20.638(0.8125)
20.638(0.8125)
20.638(0.8125)
21.463(0.8450)
14.732(0.5800)
19.355(0.7620)
19.050(0.7500)
22.225(0.8750)
20.638(0.8125)
Bmm
(inch)
9.525(0.3750)
10.668(0.4200)
12.065(0.4750)
14.288(0.5625)
13.970(0.5500)
15.875(0.6250)
15.875(0.6250)
14.288(0.5625)
15.875(0.6250)
10.668(0.4200)
15.875(0.6250)
14.288(0.5625)
17.462(0.6875)
14.288(0.5625)
bmm
(inch)
1.5(0.06)
1.3(0.05)
1.3(0.05)
1.3(0.05)
1.3(0.05)
1.3(0.05)
1.3(0.05)
1.3(0.05)
1.5(0.06)
3.5(0.14)
3.5(0.14)
3.5(0.14)
0.8(0.03)
1.3(0.05)
Rmm
(inch)
B
D d
a
R
T
br
INCH SERIES
Cone Cup
Bearing Number
11590
LM11749
LM11949
M12644
M12649
N1005
15100S
15100S
23100
L44649
1988
15112R
02872
15117
11520
LM11710
LM11910
M12611
M12610
N1005
15250X
15245
23256
L44610
1922
15245
02820
15245
SINGLE ROW TAPERED ROLLER BEARING
Abutment andFillet Dimensions
Load Centre
amm
(inch)
Kg(lb)
1.2(0.05)
5.3(0.21)
5.6(0.22)
6.4(0.25)
6.4(0.25)
6.4(0.25)
6.0(0.24)
6.0(0.24)
2.0(0.08)
3.4(0.14)
5.9(0.23)
6.0(0.24)
3.9(0.15)
6.0(0.24)
0.101(0.223)
0.081(0.179)
0.119(0.262)
0.185(0.408)
0.166(0.366)
0.327(0.721)
0.225(0.496)
0.299(0.659)
0.356(0.785)
0.117(0.258)
0.216(0.476)
0.274(0.604)
0.477(1.052)
0.275(0.606)
24.5(0.96)
23.0(0.91)
25.0(0.98)
27.5(1.08)
27.5(1.08)
32.0(1.26)
33.5(1.32)
36.5(1.44)
39.0(1.54)
37.5(1.48)
39.5(1.56)
40.0(1.57)
37.5(1.48)
36.5(1.44)
22.5(0.89)
21.5(0.85)
23.5(0.93)
25.4(1.00)
25.4(1.00)
32.0(1.26)
31.5(1.24)
35.0(1.38)
34.6(1.36)
31.0(1.22)
33.5(1.32)
34.0(1.34)
37.0(1.46)
35.0(1.38)
1.5(0.06)
1.3(0.05)
1.3(0.05)
1.3(0.05)
1.3(0.05)
1.5(0.06)
1.5(0.06)
1.3(0.05)
1.5(0.06)
1.3(0.05)
1.5(0.06)
1.3(0.05)
3.3(0.13)
1.3(0.05)
DS
mm(inch)
D1
mm(inch)
r1
mm(inch)
34.5(1.36)
34.0(1.34)
39.5(1.56)
44.0(1.73)
44.0(1.73)
55.0(2.17)
55.0(2.17)
55.0(2.17)
53.0(2.09)
44.5(1.75)
51.0(2.01)
55.0(2.17)
62.0(2.44)
55.0(2.17)
dh
mm(inch)
39.5(1.56)
37.0(1.46)
41.5(1.63)
46.0(1.81)
46.0(1.81)
57.0(2.24)
59.0(2.32)
58.0(2.28)
61.0(2.24)
47.0(1.85)
53.5(2.11)
58.0(2.28)
68.0(2.68)
58.0(2.28)
d1
mm(inch)
1.5(0.06)
1.3(0.05)
1.3(0.05)
1.3(0.05)
1.3(0.05)
1.3(0.05)
1.3(0.05)
1.3(0.05)
1.5(0.06)
3.5(0.14)
3.5(0.14)
3.5(0.14)
0.8(0.03)
1.3(0.05)
R1
mm(inch)
78
Mass(Approx.)
R1
d1DsD1dh
79
Boundary Dimensions Basic Load Rating(N)
DynamicC
StaticCo
Grease ConeOil Cup
Limiting Speed(rpm)
BearingNumber
48400
41800
50300
45100
78000
45100
49400
45100
71300
71300
80300
86200
28800
86400
95500
45200
57000
47000
56700
55200
88300
55200
60100
55200
85400
85400
96500
103500
32300
103800
107900
61300
6100
6100
5800
5600
5500
5500
5700
5600
5300
5300
5100
4900
5600
4900
4600
5300
15123
15125
02475
14125A
3188S
14131
LM48548
14137A
25877
25877
31594
3478X
N1001
3490
418
LM300849X
8200
8200
7700
7400
7300
7400
7600
7400
7100
7100
6800
6600
7400
6600
6100
7000
15425
15245
02420
14276
3120
14276
LM48510
14276
25821
25820
31520
3424S
N1001
3420
414
LM300811
62.000(2.4410)
62.000(2.4410)
68.263(2.6875)
69.012(0.7170)
72.626(2.8293)
69.012(2.7170)
65.088(2.5625)
69.012(2.7170)
73.025(2.8750)
73.025(2.8750)
76.2(3.0000)
79.985(3.1490)
69.037(2.7180)
79.375(3.1250)
88.500(3.4843)
67.975(2.6752)
31.750(1.2500)
33.338(1.3125)
34.925(1.3750)
34.989(1.3775)
38.100(1.5000)
40.988(1.6137)
18.161(0.7150)
19.050(0.7500)
22.225(0.8750)
19.845(0.7813)
30.162(1.1875)
19.845(0.7813)
18.034(0.7100)
19.845(0.7813)
23.813(0.9375)
23.813(0.9375)
29.370(1.1563)
32.751(1.2894)
14.427(0.5680)
29.370(1.1563)
26.988(1.0625)
17.500(0.689)
1.3(0.05)
1.3(0.05)
1.5(0.06)
1.3(0.05)
3.3(0.13)
1.3(0.05)
1.3(0.05)
1.3(0.05)
0.8(0.03)
2.3(0.09)
3.3(0.13)
2.5(0.10)
2.3(0.09)
3.3(0.13)
1.5(0.06)
1.5(0.06)
dmm
(inch)
Dmm
(inch)
Tmm
(inch)
rmm
(inch)
SINGLE ROW TAPERED ROLLER BEARING
19.050(0.7500)
20.638(0.8125)
22.225(0.8750)
19.583(0.7710)
29.997(1.1810)
19.583(0.7710)
18.288(0.7200)
19.583(0.7710)
24.608(0.9688)
24.608(0.9688)
28.575(1.1250)
30.925(1.2175)
10.312(0.4060)
29.771(1.1721)
29.083(1.1450)
18.000(0.7087)
Bmm
(inch)
14.288(0.5625)
14.288(0.5625)
17.463(0.6875)
15.875(0.6250)
28.812(0.9375)
15.875(0.6250)
13.970(0.5500)
15.875(0.6250)
19.050(0.7500)
19.050(0.7500)
23.812(0.9375)
25.000(0.9843)
12.700(0.5000)
23.812(0.9375)
22.225(0.8750)
13.500(0.5315)
bmm
(inch)
3.5(0.14)
3.5(0.14)
3.5(0.14)
3.5(0.14)
1.5(0.06)
0.8(0.03)
3.5(0.14)
1.5(0.06)
1.5(0.06)
1.5(0.06)
1.5(0.06)
2.5(0.10)
4.0(0.16)
3.5(0.14)
3.5(0.14)
3.5(0.14)
Rmm
(inch)
INCH SERIES
B
D d
a
R
T
br
80
SINGLE ROW TAPERED ROLLER BEARING
Cone Cup
Bearing Number
15123
15125
02475
14125A
3188S
14131
LM48548
14137A
25877
25877
31594
3478X
N1001
3490
418
LM300849X
15245
15245
02420
14276
3120
14276
LM48510
14276
25821
25820
31520
3424S
N1001
3420
414
LM300811
Abutment andFillet Dimensions
Load Centre
amm
(inch)
Kg(lb)
5.1(0.20)
6.0(0.24)
5.2(0.21)
4.1(0.16)
10.1(0.40)
4.1(0.16)
3.7(0.15)
4.1(0.16)
8.1(0.32)
8.1(0.32)
7.8(0.31)
12.5(0.48)
-
8.7(0.34)
9.2(0.36)
3.6(0.14)
0.225(0.496)
0.239(0.527)
0.379(0.836)
0.350(0.772)
0.574(1.27)
0.334(0.736)
0.250(0.551)
0.319(0.703)
0.444(0.979)
0.444(0.979)
0.619(1.36)
0.765(1.69)
0.235(0.518)
0.679(1.50)
0.825(1.82)
0.239(0.527)
42.5(1.67)
42.5(1.67)
44.5(1.75)
44.0(1.73)
41.5(1.63)
39.5(1.56)
46.0(1.81)
42.0(1.65)
43.0(1.69)
43.0(1.69)
46.0(1.81)
43.5(2.05)
-
52.0(2.05)
51.0(2.05)
52.0(2.05)
36.5(1.44)
36.5(1.44)
38.5(1.52)
37.5(1.48)
39.5(1.56)
38.5(1.52)
40.0(1.57)
40.0(1.57)
40.5(1.59)
40.5(1.59)
43.5(1.71)
43.0(1.69)
-
45.9(1.81)
44.5(1.75)
45.0(1.77)
1.3(0.05)
1.3(0.05)
1.5(0.06)
1.3(0.05)
3.3(0.13)
1.3(0.05)
1.3(0.05)
1.3(0.05)
0.8(0.03)
2.3(0.09)
3.3(0.13)
2.5(0.10)
-
3.3(0.13)
1.5(0.06)
1.5(0.06)
DS
mm(inch)
D1
mm(inch)
r1
mm(inch)
55.5(2.17)
55.0(2.17)
59.0(2.32)
60.0(2.36)
61.0(2.40)
60.0(2.36)
58.0(2.28)
60.0(2.36)
65.0(2.560)
64.0(2.52)
64.0(2.52)
71.5(2.81)
-
67.0(2.64)
77.0(3.03)
61.0(2.40)
dh
mm(inch)
58.0(2.28)
58.0(2.28)
63.0(2.48)
63.0(2.48)
67.0(2.64)
63.0(2.48)
61.0(2.40)
63.0(2.48)
68.0(2.68)
68.0(2.68)
72.0(2.83)
74.0(2.91)
-
74.0(2.91)
80.0(3.15)
65.0(2.56)
d1
mm(inch)
3.5(0.14)
3.5(0.14)
3.5(0.14)
3.5(0.14)
1.5(0.06)
0.8(0.03)
3.5(0.14)
1.5(0.06)
1.5(0.06)
1.5(0.06)
1.5(0.06)
2.5(0.10)
-
3.5(0.14)
3.5(0.14)
3.5(0.14)
R1
mm(inch)
Mass(Approx.)
INCH SERIES
R1
d1DsD1dh
r1
81
SINGLE ROW TAPERED ROLLER BEARING
Boundary Dimensions Basic Load Rating(N)
DynamicC
StaticCo
Grease ConeOil Cup
Limiting Speed(rpm)
BearingNumber
54800
54800
66200
76700
97700
142400
105800
56300
76700
77300
109000
105800
105800
142400
157400
67900
67900
83100
98400
118500
179500
139500
71900
98400
92100
149100
139500
139500
179500
193000
5000
5000
4900
4500
3700
3600
4500
4600
4500
4100
4000
4500
4500
3600
2900
LM501349
LM501349
24780
25577
HM903249
535
55176C
LM603049
25590
369S
HM804846
55187C
55194
539
72212C
6600
6600
6500
6000
4900
4800
6000
6200
6000
5500
5300
6000
6000
4800
3900
N1006
LM501310
24720
25523
HM903210
532A
55443
LM603011
25520
362A
HM804810
55443
55452D
532X
72487
73.025(2.8750)
73.431(2.8910)
76.200(3.0000)
82.931(3.2650)
95.250(3.7500)
111.125(4.3750)
112.713(4.4375)
77.788(3.0625)
82.931(3.265)
88.900(3.5000)
95.250(3.7500)
112.713(4.4375)
114.981(4.5268)
107.950(4.2500)
123.825(4.8750)
41.275(1.6250)
42.875(1.6880)
44.450(1.7500)
45.242(1.7812)
45.618(1.796)
47.625(1.875)
49.987(1.9680)
53.975(2.1250)
19.558(0.7700)
19.558(0.7700)
22.225(0.8750)
26.988(1.0625)
30.958(1.2188)
38.100(1.5000)
30.133(1.1875)
19.842(0.7812)
23.812(0.9375)
20.638(0.8125)
30.162(1.1875)
30.1875(30.162)
65.085(2.6524)
36.512(1.4375)
36.512(1.4375)
1.5(0.06)
0.8(0.03)
0.8(0.03)
2.3(0.09)
0.8(0.03)
3.3(0.13)
3.3(0.13)
0.8(0.03)
2.3(0.09)
1.3(0.05)
3.3(0.13)
3.3(0.13)
0.50-Ch.
3.3(0.13)
3.3(0.13)
dmm
(inch)
Dmm
(inch)
Tmm
(inch)
rmm
(inch)
19.812(0.7800)
19.812(0.7800)
23.020(0.9063)
25.400(1.0000)
28.875(1.1250)
36.975(1.4550)
26.909(1.0594)
19.842(0.7812)
25.400(1.0000)
22.225(0.8750)
29.370(1.1563)
26.909(1.0594)
26.909(1.0594)
36.957(1.4550)
32.791(1.2910)
Bmm
(inch)
14.732(0.5800)
14.732(0.5800)
17.462(0.6875)
22.225(0.8750
22.225(0.8750
30.162(1.1875)
20.638(0.8125)
15.080(0.5937)
19.050(0.7500)
16.513(0.6501)
23.020(0.9063)
20.638(0.8125)
44.445(1.7500)
28.575(1.1250)
25.400(1.0000)
bmm
(inch)
3.5(0.14)
3.5(0.14)
3.5(0.14)
3.5(0.14)
3.5(0.14)
3.5(0.14)
0.8(0.03)
3.5(0.14)
3.5(0.14)
3.5(0.14)
3.5(0.14)
3.5(0.14)
2.3(0.09)
3.5(0.14)
3.5(0.14)
Rmm
(inch)
INCH SERIES
B
D d
a
R
T
br
82
SINGLE ROW TAPERED ROLLER BEARING
INCH SERIES
Cone Cup
Bearing Number
LM501349
LM501349
24780
25577
HM903249
535
55176C
LM603049
25590
369S
HM804846
55187C
55194
539
72212C
N1006
LM501310
24720
25523
HM903210
532A
55443
LM603011
25520
362A
HM804810
55443
55452D
532X
72487
Abutment andFillet Dimensions
Load Centre
amm
(inch)
Kg(lb)
3.3(0.13)
3.3(0.13)
4.5(0.18)
6.2(0.25)
+0.4(+0.02)
12.2(0.48)
--
2.2(0.08)
6.2(0.25)
4.0(0.16)
3.7(0.15)
--
--
12.3(0.48)
+1.5(+0.06)
0.320(0.705)
0.325(0.716)
0.430(0.948)
0.615(1.356)
0.976(2.15)
1.838(4.052)
1.500(3.307)
0.358(0.789)
0.543(1.20)
0.548(1.208)
0.968(2.13)
1.415(3.12)
3.120(6.88)
1.45(3.20)
2.01(4.431)
53.0(2.09)
53.0(2.09)
54.0(2.13)
55.0(2.17)
65.0(2.56)
60.0(2.36)
58.7(2.31)
57.0(2.24)
55.0(2.17)
60.0(2.36)
66.0(2.60)
66.5(2.43)
66.5(2.43)
68.0(2.68)
77.0(3.03)
46.5(1.83)
46.5(1.83)
47.0(1.85)
49.0(1.93)
54.0(2.13)
54.0(2.13)
60.2(2.37)
50.0(1.97)
49.0(1.93)
53.0(2.09)
57.0(2.24)
61.7(3.62)
61.7(3.62)
61.0(2.40)
65.9(2.59)
0.8(0.03)
0.8(0.03)
0.8(0.03)
2.3(0.09)
0.8(0.03)
3.3(0.13)
3.3(0.13)
0.8(0.03)
2.3(0.09)
1.3(0.05)
3.3(0.13)
3.3(0.13)
3.3(0.13)
3.3(0.13)
3.3(0.13)
DS
mm(inch)
D1
mm(inch)
r1
mm(inch)
67.0(2.64)
67.0(2.64)
68.0(2.68)
72.0(2.83)
81.0(3.19)
95.0(3.74)
90.0(3.62)
71.0(2.80)
72.0(2.83)
81.0(3.19)
81.0(3.19)
92.0(4.17)
92.0(4.17)
94.0(3.70)
102.0(4.57)
dh
mm(inch)
70.0(2.76)
70.0(2.76)
72.0(2.83)
77.0(3.03)
91.0(3.58)
100.0(3.94)
106.0(4.17)
74.0(2.91)
77.0(3.03)
84.0(3.31)
91.0(3.58)
106.0(4.17)
106.0(4.17)
100.0(3.94)
116.0(4.57)
d1
mm(inch)
3.5(0.14)
3.5(0.14)
3.5(0.14)
3.5(0.14)
3.5(0.14)
3.5(0.14)
0.8(0.03)
3.5(0.14)
3.5(0.14)
3.5(0.14)
3.5(0.14)
3.5(0.14)
3.5(0.14)
3.5(0.14)
3.5(0.14)
R1
mm(inch)
Mass(Approx.)
R1
d1DsD1dh
r1
83
SINGLE ROW TAPERED ROLLER BEARING
Boundary Dimensions Basic Load Rating(N)
DynamicC
StaticCo
Grease ConeOil Cup
Limiting Speed(rpm)
BearingNumber
113200
150600
114800
144000
114800
114800
189000
174800
150600
264500
114800
145000
217200
167000
168000
167000
167000
247500
216500
217200
354900
167000
3500
3200
3200
2700
3200
3200
3100
2900
3200
2900
3200
462A
39581
3977 X(X32212)
HM911244
3982X
3982X
HM212047
JHM513640
39586
6379
3984
4700
4200
4300
3600
4300
4300
4100
3800
4200
3800
4300
453X
39520
3922X(X32212)
HM911216
3927XA
3920
HM212010
JHM513615
39528
6320
3920
104.775(4.1250)
112.712(4.4375)
109.985(4.3301)
134.983(5.3143)
110.000(4.3307)
112.712(4.4375)
122.238(4.8125)
130(5.1180)
119.985(4.7238)
135.755(5.3447)
112.712(4.4375)
57.150(2.2500)
59.985(2.3616)
63.500(2.5000)
64.986(2.5585)
65.088(2.5625)
66.675(2.6250)
30.162(1.1875)
30.162(1.1875)
29.751(1.1713)
35.862(1.4119)
29.370(1.1563)
30.163(1.1875)
38.100(1.5000)
36.937(1.4542)
32.751(1.2894)
53.975(2.1250)
30.162(1.1875)
3.3(0.13)
3.3(0.13)
1.5(0.06)
3.5(0.14)
1.5(0.06)
3.3(0.13)
1.5(0.06)
3.5(0.14)
0.8(0.03)
3.3(0.13)
3.3(0.13)
dmm
(inch)
Dmm
(inch)
Tmm
(inch)
rmm
(inch)
29.317(1.1542)
30.162(1.1875)
28(1.1024)
30.925(1.2175)
30.048(1.1830)
30.048(1.1830)
38.354(1.5100)
33.937(1.3361)
30.914(1.2171)
56.007(2.2050)
30.048(1.1830)
Bmm
(inch)
24.605(0.9687)
23.813(0.9375)
23.813(0.9375)
21.948(0.8641)
23.020(0.9063)
23.813(0.9375)
29.718(1.1700)
28.000(1.1024)
26.949(1.0610)
44.450(1.7500)
23.813(0.9375)
bmm
(inch)
2.3(0.09)
8.0(0.31)
2.4(0.09)
3.5(0.14)
7.1(0.28)
7.1(0.28)
7.1(0.28)
6.5(0.26)
2.3(0.09)
3.5(0.14)
3.5(0.14)
Rmm
(inch)
INCH SERIES
B
D d
a
R
T
br
84
SINGLE ROW TAPERED ROLLER BEARING
Abutment and Fillet Dimensions Load Centre
amm
(inch)
Kg
(lb)
7.1(0.28)
6.6(0.26)
3.3(0.13)
7.7(0.31)
3.3(0.13)
3.3(0.13)
10.9(0.43)
7.7(0.31)
6.6(0.26)
18.8(0.74)
4.5(0.18)
1.04(2.29)
1.315(2.889)
1.200(2.65)
2.423(5.342)
1.100(2.43)
1.214(2.676)
1.933(4.26)
2.25(4.96)
1.500(3.307)
3.598(7.932)
1.142(2.518)
SINGLE ROW TYPE
INCH SERIES
67.6(2.66)
66.0(2.60)
69.0(2.72)
74.4(2.93)
71.4(2.81)
71.4(2.81)
73.0(2.87)
73.0(2.87)
72.0(2.83)
77.4(3.05)
74.0(2.91)
67.0(2.64)
81.0(3.19)
72.0(2.83)
84.0(3.31)
77.7(3.06)
77.7(3.06)
87.0(3.43)
80.0(3.15)
76.0(2.99)
84.0(3.31)
80.0(3.15)
92.0(3.62)
103.0(4.06)
101.5(4.00)
112.0(4.41)
101.5(4.00)
99.0(3.90)
110.0(4.33)
113(4.49)
106.2(4.18)
117.0(4.61)
99.0(3.90)
Dsmm
(inch)
D1
mm(inch)
dh
mm(inch)
Cone Cup
Bearing Number
462A
39581
3977 X(X32212)
HM911244
3982X
3982X
HM212047
JHM513640
39586
6379
3984
453X
39520
3922X(X32212)
HM911216
3927XA
3920
HM212010
JHM513615
39528
6320
3920
98.0(3.86)
107.0(4.21)
104(4.09)
123.0(4.84)
104.0(4.09)
106.0(4.17)
116.0(4.57)
124(4.88)
111.0(4.37)
126.0(4.96)
106.0(4.17)
d1
mm(inch)
2.3(0.09)
8.0(0.31)
2.3(0.09)
3.5(0.14)
7.1(0.28)
7.1(0.28)
7.1(0.28)
6.5(0.26)
2.3(0.09)
3.5(0.14)
3.5(0.14)
R1
mm(inch)
3.3(0.13)
3.3(0.13)
0.4(.015)
3.5(0.14)
1.5(0.06)
3.3(0.13)
1.5(0.06)
3.5(0.14)
0.8(0.03)
3.3(0.13)
3.3(0.13)
r1
mm(inch)
Mass
R1
d1DsD1dh
r1
85
SINGLE ROW TAPERED ROLLER BEARING
Boundary Dimensions Basic Load Rating(N)
DynamicC
StaticCo
Grease ConeOil Cup
Limiting Speed(rpm)
BearingNumber
dmm
(inch)
Dmm
(inch)
Tmm
(inch)
rmm
(inch)
Bmm
(inch)
bmm
(inch)
Rmm
(inch)
69.850 120.000 29.794 29.007 24.237 3.5 2.0 133200 188500 3000 4000 482 472(2.7500) (4.7244) (1.1730) (1.1420) (0.9542) (0.14) (0.08)
127.000 36.512 36.170 28.575 3.5 3.3 164100 231300 2900 3800 566 563(5.0000) (1.4375) (1.4240) (1.1250) (0.14) (0.13)
71.438 127.000 36.512 36.170 28.575 3.5 3.3 164100 231300 2900 3800 567A 563(2.8125) (5.0000) (1.4375) (1.4240) (1.1250) (0.14) (0.13)
73.025 127.000 36.512 36.170 28.575 3.5 3.3 164100 231300 2900 3800 567 563(2.875) (5.0000) (1.4375) (1.424) (1.125) (0.14) (0.13)
76.200 139.992 36.512 36.098 28.575 5.1 3.3 173100 256800 2600 3400 575A 572(3.0000) (5.5115) (1.4375) (1.4212) (1.1250) (0.20) (0.13)
80.000 140.000 35.250 33.000 28.000 3.0 3.0 173100 256800 2500 3400 M32216A M32216E(3.1496) (5.5118) (1.3878) (1.2992) (1.1024) (0.12) (0.12)
82.550 136.525 30.162 29.769 22.225 3.5 3.3 129100 190400 2600 3500 495 493(3.2500) (5.3750) (1.1875) (1.1720) (0.8750) (0.14) (0.13)
139.700 36.512 36.098 28.575 3.5 3.3 173100 256800 2600 3400 580 572X(5.5000) (1.4375) (1.4212) (1.1250) (0.14) (0.13)
139.992 36.512 36.098 28.575 3.5 3.3 173100 256800 2600 3400 580 572(5.5115) (1.4375) (1.4212) (1.1250) (0.14) (0.13)
95.25 168.28 41.28 41.28 30.16 3.5 3.2 223800 346200 2100 2800 683 672(3.75) (6.625) (1.625) (1.625) (1.1874) (0.14) (0.13)
SINGLE ROW TYPE
INCH SERIES
B
D d
a
R
T
br
86
SINGLE ROW TAPERED ROLLER BEARINGS
SINGLE ROW TYPE
INCH SERIES
Abutment andFillet Dimensions
Load Centre
amm
(inch)
Kg
(lb)
Dsmm
(inch)
D1
mm(inch)
dh
mm(inch)
Cone Cup
Bearing Number
d1
mm(inch)
R1
mm(inch)
r1
mm(inch)
Mass(Approx.)
482 472 83.0 70.0 107.0 114.0 3.5 2.0 4.0 1.32(3.27) (3.03) (4.21) (4.49) (0.14) (0.08) (0.16) (2.91)
566 563 85.0 78.0 112.0 120.0 3.5 3.3 8.3 1.90(3.35) (3.07) (4.41) (4.72) (0.14) (0.13) (0.33) (4.19)
567A 563 86.0 80.0 112.0` 120.0 3.5 3.3 8.3 1.85(3.39) (3.15) (4.41) (4.72) (0.14) (0.13) (0.33) (4.08)
567 563 88.0 81.0 112.0 120.0 3.5 3.3 8.3 1.825(3.46) (3.19) (4.41) (4.72) (0.14) (0.13) (0.33) (4.02)
575M 572 92.0 86.0 125.0 133.0 5.1 3.3 5.5 2.325(3.62) (3.39) (4.92) (5.24) (0.20) (0.13) (0.22) (5.126)
M32216A M32216E 90.0 90.0 130.0 134.0 2.0 2.0 4.25 2.192(3.54) (3.54) (5.12) (5.28) (0.08) (0.08) (0.17) (4.833)
495 493 97.0 90.0 122.0 130.0 3.5 3.3 0.7 2.02(3.82) (3.54) (4.80) (5.12) (0.14) (0.13) (0.03) (4.453)
580 572X 98.0 91.0 125.0 133.0 3.5 3.3 5.5 2.138(3.86) (3.58) (4.92) (5.24) (0.14) (0.13) (0.22) (4.713)
580 572 98.0 91.0 125.0 133.0 3.5 3.3 5.5 2.138(3.86) (3.58) (4.92) (5.24) (0.14) (0.13) (0.22) (4.713)
683 672 113.0 106.0 149.0 160.0 3.5 3.3 3.0 3.642(4.49) (4.17) (5.87) (6.30) (0.14) (0.13) (0.12) (8.029)
R1
d1DsD1dh
r1
BEARING DESIGNATION
SINGLE ROW TAPERED ROLLER BEARING
87
SINGLE ROW TYPE
METRIC SERIES
Boundary Dimensions(mm)
Basic Load Rating(N)
DynamicC
(N)
StaticCo(N)
Grease Oil
Limiting Speed(rpm)
424042474752626262627262727272807280909068858510010080909095100130120120125125130140140145
151720
25
30
35
40
45
50
55
6065
70
7580
95
14.2513.2515.0015.2517.0016.2518.1618.2525.2517.2520.7518.018.2524.2528.032.7518.2532.025.2535.2519.0020.7524.7527.2538.3524.021.7524.7530.026.7533.524.7532.7526.2535.2527.2528.2535.2539.0
BearingNumber
13.012.015.014.017.015.019.0517.024.016.019.018.017.023.028.031.017.032.023.033.019.019.023.025.036.024.020.023.030.025.031.023.031.024.031.025.026.033.039.0
23600201002610028800325003230046000415006260043900584004230052700867007620097200625007820010000011730050500608009000098700142900693007850083700111100107000169900125000142000125500161000140800139800173100270450
2120019800295002970040500349004590041500660004850057800538005760098300790001087006920093100114000141600658006790010000011230017560010500095400103400156800132300195400150200190000152700210700178700167200256800370000
900099009500880079007300610060006700630057006100550053005000500049004900420044005300440044003600400044004000400039003600300031003100290029002700250025002300
13000130001300012000110009800820080008900840076008100740071006600660060006600560059007100590059004500530058005300530052004900400042004200390039003600340034003100
303023020332004X3020433005302053030530305C323053020630306C32007X30207M3220730307323073020832208303083230832008X302093220931309323093301030210322103311132211303123021332213302143221430215302163221633019
d D T B
11.011.012.012.014.013.014.2914.020.014.014.014.015.019.022.025.015.025.020.027.014.516.019.018.030.019.017.019.023.021.026.020.027.021.027.022.022.028.032.5
1.51.00.61.50.61.52.01.52.01.01.51.52.02.01.52.52.01.52.52.51.02.02.02.52.51.51.51.52.02.53.52.02.52.52.02.53.03.02.5
b R
1.51.00.61.50.61.51.32.22.01.02.20.52.02.01.52.52.01.50.82.51.02.00.82.52.51.01.51.52.02.53.51.52.52.51.52.53.03.02.5
r
B
D d
a
R
T
br
BEARING DESIGNATION
SINGLE ROW TAPERED ROLLER BEARING
88
SINGLE ROW TYPE
METRIC SERIES
BearingNumber
303023020332004X3020433005302053030530305C323053020630306C32007X3020732207B30307323073020832208303083230832008X302093220931309323093301030210322103311132211303123021332213302143221430215302163221633019
Abutment andFillet Dimensions
LoadCenter Mass
kg(Approx.)
2122.524.52629.53132.5343235.53741424343.543.548.548.548.548.545.552525453.555.558.558.563.563.5727573.578.580.083.59090105
22232526293130.530323740404440.5424349485250465453565656585862637777758180859190104
3634.537.54142.54656525556.56556656563.571.571.571.581.581.562.578787991.574.581.581.586.591.5118115.5111.5116.5116.5121.5130130136.5
353336404044-505253625462-616669687773607473-827279788387112106104110110115124122131
9.59.510.511.511.012.512.5161613.518.3315.51520.1418.520.516.519.049.5231518203225.517.5019.5212222.526.523.52725.525.52727.53128.5
0.0900.080.0970.1210.1300.1480.2500.2640.3810.2410.3810.2240.3150.4570.5180.7280.4350.5220.7691.0160.2730.4950.6070.9381.360.4330.5520.6480.8460.8241.9301.181.501.221.581.411.722.182.270
D1 dhDs
3838394443.548595957576659676868747575828265808195937685859195120113115118118124132134139
110.610.6111.51111111.51.51.51.51.51.51.0111.51.511.51.51.51.521.51.51.51.51.5221.5
d1 R r1 1 a(mm)min maxmax min min max
R1
d1DsD1dh
r1
89
SIN
GL
E R
OW
TA
PE
RE
D R
OL
LE
R B
EA
RIN
G
Bo
und
ary
Dim
en
sio
ns
(mm
)B
asi
c L
oad
Ra
ting
(N)
Dyn
am
icC
Sta
ticC
oC
on
eC
up
Bea
rin
g N
um
ber
19
0.5
02
00
21
2.7
31
82
.56
18
2.5
62
28
.60
23
6.5
38
33
6.5
50
33
6.5
52
47
.65
26
0.3
52
50
38
02
60
26
6.7
03
36
.55
42
03
36
.55
34
03
20
.68
36
04
60
118
01
28
01
60
09
50
42
8.6
25
40
6.4
10
1.6
011
0.0
114
.31
20
.65
12
71
27
13
9.7
15
5.5
75
16
5.1
17
4.6
31
77
.81
80
19
01
90
.5
20
02
06
.38
22
02
28
.62
60
30
09
00
13
20
71
01
90
.52
47
.65
57
.15
56
66
.68
39
.69
39
.69
53
.97
55
7.1
58
5.7
25
92
.07
47
.62
53
.97
54
79
84
64
7.6
39
8.4
31
08
98
.43
76
.50
50
.86
4.5
10
0.7
12
41
90
17
411
41
06
.36
211
5.8
9
Abu
tmen
t a
nd
Fill
et
Dim
en
sio
ns
57
.35
36
6.6
83
8.1
03
8.1
04
9.4
28
56
.64
27
9.3
75
95
.25
47
.62
53
.97
54
58
84
44
6.8
39
5.2
59
71
00
.01
72
49
.21
60
95
12
21
70
16
51
06
95
.25
21
9.6
75
38
52
00
38
81
00
47
22
00
22
64
00
22
64
00
41
44
00
49
20
00
85
63
00
115
50
00
34
15
00
44
59
00
37
61
00
10
89
80
03
63
30
03
47
10
01
00
32
00
12
93
20
011
10
90
08
58
00
04
02
00
06
95
60
01
47
75
00
32
41
50
06
33
09
00
65
39
10
02
88
22
00
10
82
40
01
60
110
0
56
52
00
54
60
00
69
12
00
44
10
00
44
10
00
59
25
00
81
46
00
12
35
10
01
69
61
00
69
35
00
81
67
00
72
84
00
14
90
90
07
15
90
07
27
70
01
80
46
00
18
63
70
02
03
12
00
14
40
10
07
42
80
01
32
32
00
26
09
70
08
37
51
00
13
19
95
00
21
28
110
06
18
65
00
14
46
00
03
09
95
00
86
13
22
22
93
84
82
82
48
29
0H
M9
26
74
7H
M2
311
32
H9
36
34
0H
H4
37
54
96
77
87
M2
36
84
8JM
73
61
49
27
33
6JM
73
82
49
67
88
5H
H8
40
24
92
73
40
H2
42
64
92
00
71
44
88
90
02
00
79
52
20
07
16
01
00
79
/90
07
1/9
00
20
07
8/1
32
01
00
79
/71
0E
E3
50
75
0H
H2
49
94
9
85
43
22
22
93
24
82
20
48
22
0H
M9
26
71
0H
M2
311
10
H9
36
31
3H
H4
37
51
06
77
20
M2
36
81
0JM
73
611
02
73
36
JM7
38
21
06
78
20
HH
84
02
10
27
34
0H
24
26
10
20
07
14
48
81
26
20
07
95
22
00
71
60
10
07
9/9
00
71
/90
02
00
78
/13
20
10
07
9/7
10
35
16
87
HH
24
99
10
12
91
22
14
11
37
14
11
56
- - 19
3.6
19
2.1
20
41
96
- 20
62
09
.52
28
.6- 2
28
.6- 2
54
- - - - - - 23
72
75
114
12
61
28
13
11
35
14
3- - 1
92
.11
85
.71
91
19
0.5
- 20
02
03
.22
06
.4- 2
23
.8- 2
41
.3- - - - - - 2
40
28
4
dD
TB
D1
Ds
44
.45
46
53
.98
33
.34
33
.34
38
.10
44
.45
53
.97
56
9.8
53
8.1
04
1.2
75
37
60
36
.50
38
.10
73
.02
66
77
.79
62
33
.34
52
82
87
13
51
42
80
.80
61
.91
29
3.6
62
8.0
3.5
7.0
3.5
3.5
3.4
3.5
6.3
53
.33
.58
.03
.05
.03
.03
.56
.46
.03
.34
.06
.43
.55
.08
.01
0.0
8.0
8.0
6.4
6.4
bR
3.3
3.5
3.3
3.3
3.3
3.3
3.3
6.0
6.4
3.3
3.2
2.5
5.0
2.5
3.3
6.4
6.0
3.3
4.0
3.3
3.5
5.0
8.0
10
.88
.03
.53
.33
.3r
Ma
sskg
(Ap
pro
x.)
17
01
88
18
71
68
16
82
00
- - 28
8.9
22
5.4
24
12
32
- 24
22
41
.32
82
.5- 3
03
.2- 2
99
- - - - - - 36
63
66
17
41
70
19
3.1
17
61
76
21
9- - 3
07
.92
39
.71
49
24
2.6
- 25
22
58
.73
19
.1- 3
17
.5- 3
08
- - - - - - 38
33
83
7.0
7.7
10
.13
.69
3.3
28
.83
- - 39
.07
.23
9.2
46
.70
46
.06
.80
8.0
37
.36
3.0
34
.28
22
.31
2.6
61
7.7
05
5.9
33
0.0
70
3.0
71
9.0
19
5.0
63
.16
0.2
D1
dh
8.0
2.0
7.0
3.5
3.5
3.5
- - 3.2
3.5
8.0
3.0
- 3.0
3.5
6.4
- 3.3
- 6.4
- - - - - - 6.4
6.4
3.3
- 3.3
3.3
3.3
3.3
- - 6.3
53
.33
.32
.5
2.5
3.3
6.4
- 3.3
- 6.4
- - - - - - 6.4
6.4
R1
r 1
R1
d1
Ds
D1
dh
r 1
B
Dd
a
R
T br
90
DO
UB
LE
RO
W T
AP
ER
ED
RO
LL
ER
BE
AR
ING
Bou
nd
ary
Dim
ensi
ons
(mm
)B
asi
c Lo
ad
Ratin
g(N
)
Dyn
am
icC
Sta
ticC
oC
one
Cup
Be
ari
ng
Num
be
r
19
6.8
51
80
.98
18
0.9
82
30
20
0.0
32
70
24
4.4
82
66
.70
34
04
00
36
04
00
42
04
20
50
04
60
48
8.9
56
20
54
6.1
60
05
39
.75
70
06
80
65
06
60
.47
20
75
08
20
80
08
70
79
3.7
59
50
96
5.2
12
50
99
.98
10
4.7
8
13
01
42
.88
15
01
59
.95
19
0.5
02
20
24
02
60
30
03
05
.08
34
03
46
.07
38
03
84
.18
40
04
06
.44
20
46
04
80
48
8.9
55
00
56
0
60
0
60
9.6
71
07
62
95
0
10
3.3
81
04
.78
10
4.7
81
50
93
.66
17
21
07
.95
10
3.1
91
65
21
01
34
18
61
70
16
02
00
16
02
00
.02
24
22
22
.25
20
61
42
.88
27
52
30
18
02
06
.38
21
62
13
24
22
10
27
02
06
.38
24
01
87
.33
30
0
Abu
tme
nt
an
dF
ille
t D
imen
sion
s
74
.42
85
.73
85
.73
12
07
3.0
31
38
79
.37
84
.14
13
01
68
10
91
46
- 12
8- 1
28
15
8.7
51
70
117
.81
50
10
1.6
20
01
75
13
01
58
.75
- 15
6- 1
60
19
81
58
.75
17
51
33
.35
22
0
54
82
00
49
63
00
49
63
00
92
05
00
37
27
00
13
50
90
05
89
10
06
09
27
01
55
02
00
14
86
90
011
92
60
01
75
29
00
20
75
90
01
71
43
00
22
21
00
01
72
55
00
30
21
30
02
02
18
00
32
17
50
02
77
02
00
13
55
40
04
53
79
00
34
35
40
02
25
19
00
311
54
00
31
39
90
03
16
27
00
43
75
20
03
46
20
00
53
97
60
03
46
20
00
47
78
20
03
39
21
00
73
79
50
0
78
07
00
87
65
00
87
65
00
16
82
30
09
86
20
02
38
80
00
10
69
00
01
50
00
00
30
811
00
22
36
70
02
64
65
00
37
31
80
04
03
58
00
39
52
20
04
68
49
00
40
92
70
06
311
80
03
46
94
00
82
50
50
06
05
95
00
32
29
40
09
25
39
00
75
88
30
05
54
45
00
80
02
80
07
62
53
00
80
59
80
011
52
70
00
98
46
20
01
05
30
70
09
84
62
00
12
38
27
00
10
08
48
00
20
47
41
00
HM
82
15
47
78
2N
A7
82
97
52
6N
A4
86
86
97
53
08
16
30
67
88
52
09
71
44
20
97
74
82
09
79
52
20
97
15
24
77
52
20
97
96
0N
10
21
20
97
96
8H
M2
62
74
91
09
77
76
HM
26
64
49
97
18
0E
E2
34
16
01
09
77
84
97
19
21
09
79
96
EE
64
01
92
40
47
1/5
00
10
97
9/5
60
84
71
/56
01
09
79
/60
09
71
/60
0E
E6
49
24
01
09
79
/71
0E
E7
52
30
01
09
79
/95
0
HM
82
15
11D
77
4D
77
4D
97
52
64
86
20
D9
75
30
81
96
3D
67
82
0D
20
97
14
42
09
77
48
20
97
95
22
05
71
52
47
75
22
09
79
60
N1
02
12
09
79
68
HM
26
27
10
D1
09
77
76
HM
26
64
10
D9
71
80
23
42
13
D1
09
77
84
97
19
21
09
79
96
64
02
61
D4
04
71
/50
01
09
79
/56
08
47
1/5
60
10
97
9/6
00
97
1/6
00
64
93
13
D1
09
79
/71
07
52
38
1D
10
97
9/9
50
12
0.6
12
0.6
- - - - - - - - - - - - - - 37
7.8
- 41
5.9
- 43
4.9
- - - 52
3.9
- - - - - 64
4.5
- 80
0.1
-
18
7.3
16
6.7
- - - - - - - - - - - - - - 46
6.7
- 52
0.7
- 51
5.9
- - - 63
0.2
- - - - - 75
5.6
- 92
3.9
-
14
.48
9.5
3- - - - - - - - - - - - - - 2
0.6
- 22
.22
5- 2
0.6
4- - - 2
3.8
1- - - - - 2
3.8
1- 2
6.1
9-
dD
Bi
D1
Ds
3.6
3.5
3.5
4.0
3.5
4.0
3.5
3.5
4.0
5.0
3.5
5.0
5.0
4.0
5.0
4.0
6.3
56
.06
.35
6.0
6.3
58
.08
.06
.06
.35
8.0
6.0
8.0
6.0
8.0
6.3
58
.06
.35
10
.0
1.5
1.5
1.5
1.5
0.7
61
.51
.50
.81
.52
.01
.22
.05
.01
.54
.01
.51
.52
.51
.52
.51
.53
.53
.52
.51
.58
.02
.511
.02
.53
.51
.53
.51
.54
.0
Be
rr1
Mass
kg(A
ppro
x.)
3.6
3.5
- - - - - - - - - - - - - - 6.3
5- 6
.35
- 63
5- - - 6
.35
- - - - - 6.3
5- 6
.35
-
1.5
1.5
- - - - - - - - - - - - - - 1.5
- 1.5
- 1.5
- - - 1.5
- - - - - 1.5
- 1.5
-
14
.65
11.2
411
.24
25
.38
.43
39
.10
18
.18
17
.70
48
.09
8.0
36
.87
6.8
88
.56
2.9
15
4.6
71
.011
7.6
02
43
.01
65
.01
80
.08
8.8
40
6.0
25
3.0
15
1.0
20
0.0
28
5.0
23
5.0
42
7.0
24
2.0
50
0.0
26
2.0
41
5.0
32
4.0
93
0
S2
TD
OT
DO
TN
AT
DO
TN
AT
DO
TD
OT
DO
TD
O]
TD
OT
DO
TD
OT
DI
TD
OT
DI
TD
OT
DO
TD
OT
DO
TD
OT
DO
TD
OT
DO
TD
OT
DO
TD
IT
DO
TD
IT
DO
TD
OT
DO
TD
OT
DO
TD
O
R1
R1
min
min
min
ma
xm
ax
Type
Typ
e : T
DO
= D
ou
ble
cu
p, tw
o s
ing
le c
on
es
with
co
ne
sp
ace
r Typ
e : T
DI =
Do
ub
le c
up
, tw
o s
ing
le c
on
es
with
ou
t co
ne
sp
ace
r T
DA
= D
ou
ble
cu
p, tw
o s
ing
le c
on
es
with
co
ne
sp
ace
r.
Dd
r
r 1
Be
Bi
d1
Ds
S 2
R1
R
FO
UR
RO
W T
AP
ER
ED
RO
LL
ER
BE
AR
ING
91
Bou
nd
ary
Dim
ensi
on
s(m
m)
Basi
c L
oa
d R
atin
g(N
)
Dyn
am
icC
Sta
ticC
oC
one
Cu
p
Be
ari
ng
Num
be
r
24
7.6
52
84
.16
2
34
04
40
35
5.6
37
9.8
93
80
.90
45
7.1
05
46
.10
70
06
34
.87
72
08
30
73
6.6
08
00
92
08
12
.81
09
011
30
13
33
.5
17
7.8
18
0.8
43
20
02
60
26
6.7
28
0.2
72
85
.75
34
3.0
54
06
.40
48
04
89
.02
50
0
55
8.8
60
06
30
66
0.4
67
07
50
93
9.8
19
2.0
91
01
.60
30
51
28
22
8.6
24
4.4
82
44
.48
25
42
88
.93
77
32
0.6
84
20
57
03
22
.26
36
55
15
36
5.1
37
10
69
09
39
.8
19
2.0
23
9.7
15
30
53
30
23
0.1
92
44
.48
24
4.4
82
54
28
8.9
34
20
32
0.6
84
20
57
03
22
.26
36
55
15
36
5.1
37
10
69
09
39
.8
10
09
60
01
47
32
00
25
22
16
23
27
72
00
18
35
20
01
98
38
00
19
83
80
02
41
56
00
36
15
70
05
46
88
00
43
26
60
06
76
09
00
10
99
33
05
42
26
00
59
35
60
09
90
03
00
62
38
20
01
89
36
30
01
71
20
50
02
54
77
20
0
27
68
30
03
66
27
00
57
60
80
07
62
44
00
53
24
40
05
97
21
00
59
72
10
06
75
17
00
10
57
19
00
15
46
66
00
14
09
18
00
18
27
52
00
26
62
47
00
16
12
01
00
19
69
24
00
27
58
23
00
23
30
06
00
49
71
94
00
50
48
92
00
70
76
70
00
67
79
0M
24
06
31
T/
64
4T
D/6
47
T2
07
71
44
47
77
52
LM
45
13
49
DW
N1
02
8L
M6
54
64
8D
WL
M7
61
64
9D
WL
M7
67
74
9D
W5
77
79
6E
E2
43
19
3D
W7
71
/50
01
07
77
/50
0E
E8
43
22
1D
77
9/6
00
77
1/6
30
L2
811
49
DN
10
14
D7
77
/75
0L
M2
87
84
9D
67
72
0- 2
07
71
44
47
77
52
LM
45
13
10
N1
02
8L
M6
54
61
0L
M7
61
61
0L
M7
67
71
05
77
79
62
43
25
07
71
/50
01
07
77
/50
08
43
29
07
79
/60
07
71
/63
0L
28
111
0N
10
15
77
7/7
50
LM
28
78
10
67
72
1D
M2
40
611
D
20
77
14
4- L
M4
51
31
0D
N1
02
8L
M6
54
61
0D
LM
76
16
10
DL
M7
67
71
0D
- 24
32
51
D7
71
/50
01
07
77
/50
08
43
29
1D
77
9/6
00
77
1/6
30
L2
811
10
DN
10
16
D7
77
/75
0L
M2
87
81
0D
TQ
OT
QIT
TQ
OT
QIT
TQ
OT
QO
TQ
OT
QO
TQ
O- T
QO
TQ
OT
QO
TQ
OT
QO
TQ
OT
QO
TQ
OT
QO
TQ
O
28
.13
60
.00
10
4.0
01
96
.00
65
.50
79
.20
76
.42
110
.00
18
5.0
05
37
.00
27
0.0
05
60
.00
12
50
.03
75
.00
53
1.0
011
60
.04
20
.02
66
0.0
25
50
.04
39
0.0
AB
C
1.5
3.3
4.0
5.0
1.6
1.5
1.5
1.6
1.5
6.0
3.3
8.0
10
.03
.36
.01
0.0
3.2
10
.01
0.0
4.8
3.3
1.5
4.0
5.0
3.2
3.2
3.2
3.2
6.3
52
.53
.38
.01
0.0
6.3
56
.01
0.0
6.4
10
.01
0.0
12
.5
DR
r
Ma
sskg
(Ap
pro
x.)
Typ
e
Sin
gle
Do
uble
TA
PE
RE
D B
OR
E B
EA
RIN
G
Typ
e : T
QO
= O
ne
do
ub
le c
up
, tw
o s
ing
le c
up
s, w
ith tw
o c
up
sp
ace
rs, tw
o d
ou
ble
co
ne
s w
ith o
ne
co
ne
sp
ace
r.Typ
e : T
QIT
= T
wo
do
ub
le c
up
s w
ith c
up
sp
ace
r, o
ne
ta
pe
red
do
ub
le c
on
e &
tw
o ta
pe
red
sin
gle
co
ne
.
BS
RR
AP
DC
rr
92
THRUST BEARING
Boundary Dimensions(mm) Bearing
Number
110
120
140
160
340
630
670
710
76.2
88.9
152.4
304.8
460
203.2
165
179
203
233
341
631
672
711
82.55
90.47
154
307.18
460
203.2
230
250
280
320
540
850
800
950
119.84
138.89
254
609.6
800
419.1
188
206
234
266
540
850
800
950
116.66
129.36
252.4
607.22
800
419.1
73
78
85
95
160
175
105
185
25.4
33.32
50.8
114.3
206
92.075
4.0
4.0
5.0
5.0
6.0
8.0
5.0
8.0
-
-
4.0
9.5
-
9.7
TL-110
TL-120
TL-140
TL-160
8368
82/630
81/670
N-1013
T624
AT-626
9923
N-1011
9889492
T-811-TTHD
237400
268900
297300
366600
1121100
1326600
858200
1214600
156300
166500
715810
3906711
5613300
2490000
520800
615900
737800
989700
4439800
8040500
5489600
8018200
466600
528000
3214123
23041514
32882600
10600000
TL Series
TL Series
TL Series
TL Series
TL Series
Ball Trust
Ball Trust
Roller Thrust
Roller Thrust
Roller Thrust
Roller Thrust
Roller Thrust
Roller Thrust
Roller Thrust
11.34
14.58
18.86
28.12
148.00
252.00
105.00
407.00
1.07
1.87
10.30
157.0
435.00
-
d C D E B r
Basic Load Rating(N)
DynamicC
StaticCo
WeightKg
(Approx.)
Type
B
D
C
E
d
E
d
B
C
E
C
E
d
D
TL SERIES BALL THRUST ROLLER THRUST
SPHERICAL ROLLER BEARINGS
Boundary Dimensions(mm) Bearing
Number
60
70
75
100
110
130
140
130
150
130
215
200
280
300
46
51
31
73
53
93
102
2.1
2.1
1.5
3.0
2.1
4.0
4.0
22312, 22312K
22314, 22314K
22215, 22215K
22320, 22320K
22222, 22222K
22326, 22326K
22328
238000
325000
190000
599100
410000
1043000
1110000
273000
380000
246000
727200
570000
1343600
1430000
METRIC SERIES
d D B r
Basic Load Rating(N)
DynamicC
StaticCo
93
D
B
r
r
d d
Cylindrical bore Tapered bore (K)(1:12)
94
UNITS SPECIFIED IN SI SYSTEM
Force
1 KN (Kilo newton) = 1000N = 102Kgf1 Kgf = 9.81N
Pressure
2 21 bar = 10 N/cm = 1.02 Kg/cm2 2
1 Kgf/mm = 9.81 N/cm = 0.981 bar
Stress Contact Pressure
21 N/mm = 1 Mpa (Mega pascal)
2= 0.102 Kgf/mm2 21 Kgf/mm = 9.81 N/mm
Torque
1 Nm = 0.102 Kgf-m1 Kgf-m = 9.81 Nm
Energy
1 J (Joule) = 1 Nm = 1Ws (Watt Second)= 0.102 Kgf-m
1 Kgf-m = 9.81 ws = 9.81 Nm= 9.81 J
Power
1 W = 1J/s = 1 Nm/s = 0.102 Kgf-m/s1 KW = 1.36 PS = 102 Kgf-m/s1 PS = 0.736 KW = 75 Kgf-m/s1 Kgf-m/s = 9.81 N-m/s = 9.81 J/s
= 9.81 W
Kinematic Viscosity
21mm /s = 1cst (Centi stoke)
95
STEEL BALLS
INCH SIZE METRIC SIZES
Basic
Diameter
Weight per
1000 balls in kgBasic
Diameter
Weight per
1000 balls in kg
7/64
1/8
5/32
3/16
7/32
15/64
1/4
17/64
9/32
5/16
11/32
3/8
13/32
7/16
15/32
31/64
1/2
17/32
9/16
19/32
5/8
21/32
11/16
23/32
3/4
25/32
13/16
27/32
7/8
29/32
15/16
31/32
1
0.08722
0.1302
0.2543
0.4395
0.6979
0.8583
1.042
1.250
1.483
2.035
2.708
3.516
4.469
5.582
6.867
7.576
8.333
9.996
11.87
13.96
16.28
18.84
21.66
24.75
28.13
31.79
35.77
40.05
44.66
49.62
54.93
60.61
66.67
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
8
8.5
9
10
11
12
13
14
15
16
17
18
20
21
22
23
24
25
0.1102
0.1769
0.2630
0.3707
0.5086
0.6804
0.8788
1.1295
1.4107
1.7418
2.1001
2.522
3.003
4.110
5.489
7.121
9.027
11.295
13.73
16.78
20.18
24.00
32.88
38.10
43.82
49.90
56.70
64.41
96
INCHES TO MILLIMETERS.FRACTIONS.
MILLIMETERS TO INCHESUNITS.
CONVERSION TABLES.
1/16
1/8
3/16
1/4
5/16
3/8
7/16
1/2
1/32
3/32
5/32
7/32
9/32
11/32
13/32
15/32
1/64
3/64
5/64
7/64
11/64
13/64
15/64
17/64
19/64
21/64
23/64
25/64
27/64
29/64
31/64
Inches mm Inches mm
.015625.03125
.046875.0625
.78125
.09375.109375
.125.140625.15825
.171875.1875
.201325.21875
.234375.25
.255625.28125
.296875.3125
.328125.34375
.359375.375
.390625.40625
.421875.4375
.413125.46875
.484375.5
.03969.7937
1.19061.58751.98442.38122.77813.17503.57193.96874.36584.76255.15945.55625.95316.35006.74697.14377.54087.93758.33448.73129.12819.52509.921910.318710.715611.112511.509411.906212.303012.7000
9/16
5/8
11/16
3/4
13/16
7/8
15/16
31/32
29/32
27/32
25/32
23/32
21/32
19/32
17/3233/64
35/64
37/64
39/64
41/64
43/64
45/64
47/64
49/64
51/64
53/64
55/64
57/64
59/64
61/64
63/64
.515626.53125
.546875.5625
.578125.59375
.609375.625
.640625.65625
.671875.6875
70312571875734375
7576562578125796875
812582812584375859375
87589062590625921875
937595312569875984375
13.096913.493713.890614.287514.684415.081215.478115875016.271916.663717.065617.462517.859418.256218.653119.050019.446919.843720.2406.20637521.034421.431221.828122.225022.621923.018723.415623.812524.209424.606225.0031
mm0.011.002.003.004.005.006.007.008.009
Inch.0254.0508.0762.1016.1270.1524.1778.2032.2286
mm.01.02.03.04.05.06.07.08.09
Inch.254.508.7621.0161.2701.5241.7782.0322.286
mm.1.2.3.4.5.6.7.8.9
Inch2.545.087.6210.1612.7015.2417.7820.3222.86
mmInch
0
1
2
3
4
5
6
7
8
9
25.4
50.8
76.2
101.6
127.0
152.4
177.8
203.2
228.6
10
2540
279.4
304.8
330.2
355.6
381.0
406.4
431.8
457.2
482.6
20
508.0
533.4
558.8
584.2
609.6
635.0
660.4
685.8
711.2
736.6
30
762.0
787.4
812.8
838.2
863.6
889.0
914.4
939.8
965.2
990.6
mm0123456789
.0393707874.11811.15748.19685.23622.27559.31496.35433
10.39370.43360.47244.51181.55118.59055.62992.66929.70866.74803
20.78740.82677.86614.90551.94488.98425
1.023621.062991.102361.14173
301.181101.220471.259841.299211.338581.377951.417321.456691.496061.53543
401.574801.614171.653542.086621.732281.771651.811031.850401.889771.92914
501.968512.007882.044.952.086622.125992.165362.204732.244102.283472.32284
602.362212.401582.834652.480342.159692.559062.598432.637802.677172.71654
702.755912.795283.228352.874022.913392.952762.992133.031503.070873.11024
803.149613.188983.228353.267723.307093.346463.385833.425203.464573.50395
903.543313.582883.622053.661423.700793.740163.779533.818903.858273.89764
0102030405060708090
mm
.39370
.787401.181101.574801.968512.362212.755913.149613.54331
1003.937014.330714.724415.118115.511815.905526.299226.692927.086627.48032
2007.874028.267728.661429.055139.448839.8425210.236210.629911.023611.4173
30011.811012.204712.598416.992113.385813.779514.173214.566914.960615.3543
40015.748016.141716.535416.929117.322817.716518.110318.504018.897719.2914
50019.685120.078820.472520.866221.259921.653622.047322.441022.834723.2284
60023.622124.015824.409524.803225.196925.590625.984326.378026.771727.1654
70027.559127.952828.346528.740229.133929.527629.921330.315030.708731.1024
80031.496131.889832.283532.677233.070933.464633.858334.252034.645735.0394
90035.433135.826836.220536.614237.007937.401637.795338.189038.582738.9764
FRACTIONS
mm0.0010.0020.0030.0040.0050.0060.0070.0080.009
Inch.000039.000079.000118.000157.000197.000236.000276.000315.000354
mm0.010.020.030.040.050.060.070.080.09
Inch.00039.00079.00118.00157.00197.00236.00276.00315.00354
mm0.010.020.030.040.050.060.070.080.09
Inch.0039.0079.0118.0157.0197.0236.0276.0315.0354
1 Meter = 39.370113 inches1 Inch = 25.399978 millimeters
National Engineering Industries Ltd.Jaipur
Manufacturers of Steel balls, Rollers, Ball bearing,Roller bearing and Axle Boxes.