10 blocks swivels

8/16/2019 10 Blocks Swivels

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B l o c k s &

S w i v e l s



Loads on Snatch Blocks

The stress on a snatch block varies with the degree of anglebetween the lead and load lines. When the two lines are parallel,1000kg on the lead line results in a load of 2000kg on the hook.As the angle between the lines increases, the stress on the hookis reduced as illustrated below.

To determine the stress on a hook, multiply the pull on the leadline by a suitable factor from the following table adding 10% forfriction.

Blocks & Swivels

230

SHEAVE & SNATCH BLOCKS

Sheave and snatch blocks are designed to deflect a loaded wire

rope when a change in direction is required for a particularapplication or to increase the line pull or lifting capacity of a hoistor winch by multiplying the number of parts of line.

A sheave or snatch block usually consists of side plates, sheaveand a head fitting or lower lifting fitting. These blocks areavailable in a wide variety of configurations and numerous sheavecombinations.

Sheave Blocks

A sheave block refers to a block in which the side plates are fixedaround the sheave or sheaves and the rope cannot be placed intothe block at any point along its length. Sheave blocks, exceptsnatch blocks, can only be reeved by feeding the end of the ropethrough the block. This type of block is most commonly used withwire rope in crane fall blocks. Sheave blocks and crane fall blocks

often have numerous sheaves depending on the craneconfiguration.

Snatch Blocks

A snatch block usually only has one or two sheaves and is usedmore as a lifting accessory with wire rope slings or as a means of increasing line pull in a winching application as opposed to anintegral part of a crane as is often the case with sheave blocks.The main feature common to snatch blocks is that the side platesopen to allow the block to be placed on a wire rope at any pointin a winching application or to allow wire rope slings to be placedinto the block as in most circumstances it is impractical to feed awire rope sling through a sheave block.

General InformationWorking Load Limit (WLL) is the maximum load, which may beapplied to the head fitting in normal conditions of use as definedin Australian Standard 1418. This shall be not greater than thevalue determined by means of the appropriate formula.

Where:N = number of sheavesPR = minimum breaking load of rope in kilonewtonsKs = safety factor of rope

1 Part

of Line

2 Parts

of Line

3 Parts

of Line

4 Parts

of Line

5 Parts

of Line

Type of Sheave Block WLL of Sheave Block

With Becket

Without Becket

Working Load Limit

Ks

(2N + 1) PR

Ks

2N PR

Ordering

When ordering sheave blocks or snatch blocks always specify thefollowing information:

1. Sheave size.

2. Block number (Stock Code).

3. Number of sheaves.

4. Type of bearing: (BB) Bronze Bushed, (RB) Roller Bearing.

5. Type of head fitting, Hook, Shackle or Toggle Block.

6. Wire rope diameter.

7. WLL per rope fall, or on head fitting.

8. Swivel, or fixed head fitting required.

9. If becket required.

10. State class of crane or nature of duty.

11. Is block required to swivel under load?

12. Surface finish (if not plated).

Angle Factor Angle Factor

5˚ 1.998 65˚ 1.69

10˚ 1.99 70˚ 1.64

15˚ 1.98 75˚ 1.58

20˚ 1.97 80˚ 1.53

25˚ 1.95 85˚ 1.47

30˚ 1.93 90˚ 1.41

35˚ 1.9 95˚ 1.35

40˚ 1.87 100˚ 1.29

45˚ 1.84 105˚ 1.22

50˚ 1.81 110˚ 1.15

55˚ 1.77 115˚ 1.07

60˚ 1.73 120˚ 1.00

(Eg.) 'S' when L =1.6t at 60° = 1.6t x 1.73+10% friction.

'S' = 3.04t (ie. stress on hook).

‘S ’

90º L



Blocks & Swivels

SHEAVE & SNATCH BLOCKS

Inspection Before Use

When inspecting a block attention should be paid to the followingparts, check for wear, cracks, nicks, gouges, excessive corrosionand correct operation of moving parts.

The pre-use inspection for a snatch or sheave block shouldinclude the following:

1. The head fitting nut must be checked to ensure it is properlyengaged into its retaining nut to the full depth, the thread islocked and the R clip is fitted correctly.

2. Look for wear on pins, axles, rope grooves, side plates,bushes/bearings and fittings. Excessive wear may be a causeto replace parts or remove the block from service, 10% wearis the maximum permissible.

3. Look for deformation and distortion in side plates, pins andaxles, fitting attachment points, trunnions etc. Deformationcan be caused by abusive service, overload, heat or impropermodification. Deformation is cause for further inspection andwill most likely require that the block be removed fromservice.

4. Look for wobble or misalignment in sheaves. These symptomsmay mean that bearings require replacement or axles aredamaged and are cause for further inspection. Also look andlisten for grinding when the sheave is rotated.

5. Always ensure that all nuts bolts, scotch keys, cotter pins,keeper plates, R clips and other locking methods are secure.Particularly after any disassembly for inspection.

6. Check that the sheave axle does not turn. This may mean the

axle bearing has seized or been damaged and/or the keepingmethod is damaged or loose.

7. Check for excessive free play between the eyebolt (or hookshank) and the bow. Check for radial and longitudinal freeplay. Excessive free-play is a sign of wear.

8. Look for deformation or corrosion in threads and look forcracks or corrosion in welds as these may dangerously weakenthe block - any crack is cause to withdraw a block fromservice.

9. Check the hook and latch for any sign of deformation.Deformed hooks are a sign of overloading which may weakenthe hook. Replacement latches are available.

Care In UseRatings or Working Load Limits (WLL) shown in Nobles literature

and stamped onto sheave blocks apply to new or as new conditionproducts. The WLL can be affected by intentional alterations,damage, corrosion, misuse and special conditions of use. Alwayshave your block regularly inspected by a competent person whomay suggest repairs or condemn your blocks.

Shock loading can greatly increase the actual loads placed on a

block and must be taken into account when selecting sheaveblock systems. The WLL that applies for any Nobles block appliesto the head fitting load (unless stated otherwise). It is importantto calculate the actual load experienced by the whole block inorder to determine the head fitting load. The angles at whichlines enter and exit a block and the number of parts of line in thesystem can dramatically amplify the affect of a particular lineload.

Sheave blocks must always be correctly selected and fitted forevery lift. Side loading must be prevented, always check thathooks are properly seated and loads are not supported by safetycatches.

Never weld any part of a block without consulting Nobles. Specialsteels are commonly used and special welding procedures andprecautions are necessary.

Special Conditions

Unless stated otherwise Nobles sheave blocks as standard aredesigned in accordance with AS 2089. They are intended forgeneral lifting purposes. Special conditions in use includingenvironmental conditions, chemical exposure, explosiveatmospheres, marine environments, personnel lifting, shockloading and tilt wall lifting etc. can greatly influence the life andsuitability of a particular block. Always seek advice on thesuitability of your sheave blocks. Demanding applications andenvironments may shorten the inspection intervals of your blockand may affect the WLL.

MaintenanceSheave blocks and snatch blocks must be regularly inspected and

maintained for peak efficiency and extended usefulness. As with all lifting equipment sheave and snatch blocks should be inspected before each use.

The frequency of lubrication is dependent upon frequency andperiods of use, environmental conditions and the user's good judgment.

Lubrication

The frequency of lubrication depends upon the frequency andperiod of product use as well as environmental conditions.Assuming normal product use the following greasing scheduleis suggested.

Sheave Bearings:

• Ball bearings - every 24hrs continuous operation or every14 days intermittent operation.

• Double row roller bearings - every 40 hours of continuousoperation or every 30 days of intermittent operation.

• Bronze and “GARMAX” bushes - Bronze bushes every 8 hoursof continuous operation or 14 days of intermittent operation.Most Nobles blocks are fitted with superior “GARMAX” bushes,which are self-lubricating at low loads. Where grease nipplesare fitted these bushes should be greased at the same rate asfor bronze bushes.

Head fitting bearings:

• Roller or ball thrust bearings - Every 14 days for frequentswiveling or 45 days for infrequent swiveling.

• Bronze thrust washers - Every 16 hours of use or 21 daysif rarely swiveling.

Sheave block maintenance also depends upon proper blockselection, reeving and consideration of loading and adverseconditions.

Shackle

Eyebolt, Bow,Headfitting Nut

& Thrust Bearing(if fitted)

Side Plates

Snatch Pin

Axle

Sheave

B l o c k s &

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Blocks & Swivels

CUSTOM BLOCKS

In addition to our standard range of blocks and swivels Nobles

can design, manufacture and proof test custom made applicationspecific blocks on request. All of our blocks are designed andmanufactured in accordance with relevant Australian Standards.

Varying capacities and configurations are available and blocks upto 1,000 tonne proof load testing capacity can be manufactured.Numerous combinations of sheaves, head fittings, beckets, hooksand side plates can be supplied as required.

This fall block for anoffshore crane wasdesigned, manufactured and tested to marinespecifications and wasLloyd's certified.

This crane fall block wasfor a special applicationin a smelter and is used for handling hot metal.

Custom made blocks have been designed and manufactured for a

wide range of applications including crane fall blocks, traditionallifting snatch blocks and recovery blocks. Nobles blocks areextremely durable and will provide a long service life even in themost arduous conditions.

Completed refurbishment of hook block assembly

We have even resurrected lifting equipment presented to us in bits

Our extensive engineering and manufacturing capabilities meanthat we can offer a complete repair, refurbishment, andmodification service for blocks, swivels and sheave assemblies,including design verification (fitness for purpose) and testing.

This service is available nation wide through our extensive branchnetwork.

REPAIRS & REFURBISHMENT



Blocks & Swivels

NES/NMD SERIES SNATCH BLOCKS

• Factor of Safety is 5 to 1. WLL in tonnes except hooks

which shall comply with AS 3777.• Alloy steel side plates and pins.

• Sheave lubrication through axle is available as an option.

• All blocks are individually NATA proof load tested atmanufacture.

• Sheaves are fitted with PTFE bushes as standard.

• For high speed operation Roller Bearings should bespecified.

• Custom blocks are available on request.

• Varying sheave grooves are available if required.

• NES Series is also available in double sheave

configurations.• NMD Series is also available in double or treble sheave

configurations.

• Available with eye, shackle or hook head fittings.

Stock WLL A B C D E F Snatch Becket Sheave Rope Sheave Weight

Code tonnes Block Fitted Overall Range Centre kgmm mm mm mm mm mm Diameter mm Spacing

NBNES110E 2.5 50 274 376 17 27 78 Yes Yes 100 8-10 N/A 5.5

NBNES115E 4 68 342 420 25 34 80 Yes No 150 12-13 N/A 7.7

NBNES120E 4 68 327 457 25 34 80 Yes No 203 12-13 N/A 11.2

NBNES125E 4 68 402 530 25 34 80 Yes No 250 12-13 N/A 15.1

NBNMD115E 4 68 273 421 25 34 80 No Yes 150 12-13 N/A 5.2

NBNMD215E 4 68 273 421 25 34 124 No Yes 150 12-13 43 8.7

NBNMD315E 4 68 273 421 25 34 164 No Yes 150 12-13 40 10.1

Note: For Stock Codes of NMD blocks with a Hook head fitting the E on the end of the stock code is replaced with a H.

NES 125 ESnatch Block

NES 110 ESnatch Block

ED

A

B

C

F

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• Factor of Safety is 5 to 1. WLL in tonnes except hooks

which shall comply with AS 3777.• Alloy steel side plates pins and axles.

• Sheave lubrication through axle.

• All blocks are individually NATA proof load tested atmanufacture.

• Sheaves are fitted with PTFE bushes as standard.

• For high speed operation Roller Bearings should bespecified.

• Custom blocks are available on request.

• Varying sheave grooves are available if required.

• Available in double sheave configurations.

• Available with shackle or hook head fittings.

• Available in toggle configuration (no head fitting).

Blocks & Swivels

NSB/NHC SERIES SNATCH BLOCKS

A

C D

B B

F

G

E

Does my Block have a Head Fitting thatcan swivel under load?

Many blocks have head fittings that can swivel. Thestandard issue head fitting in most cases is not fitted with

a thrust bearing of any kind. These swivel head fittingsare designed to allow alignment and proper positioning of blocks during take up only. Do not intentionally swivel aload about a head fitting without a proper bearing, theresult will increase wear and possible unscrewing anddetaching of the head fitting under load. To check for thepresence of a thrust bearing simply look between the bowand the head fitting nut. A roller bearing should beobvious if a bearing is present. If you are in any doubtcall Nobles quoting the test number and we can make adetermination based on our records.

234

NSB Series Toggle Block (No Head Fitting)

NSB Series Block withShackle Head Fitting

WARNING

• A potential hazard exists when lifting or dragging heavy loadswith sheave block assemblies.

• Failure to design and use sheave block systems properly maycause a load to slip or fall - the result could be serious injuryor death.

• A sheave block system should be rigged by a suitablyqualified person.

• Do not side load sheave blocks.

• Instruct workers to be alert and to wear proper safety gear inareas where loads are moved or supported by sheave blocksystems.

• Use only genuine Nobles parts as replacement.

• Read, understand, and follow instructions to select, use andmaintain sheave block systems.



Blocks & Swivels

NSB/NHC SERIES SNATCH BLOCKS

Stock WLL Sheave Suits A B C D E F G

Code tonnes Diameter Wire Ropemm mm mm mm mm mm mm mm mm

NBNHC120S 17 200 24-26 382 305 38 99 108 76 81

NBNHC126S 17 260 24-26 382 385 38 99 108 76 81

NBNHC130S 17 300 26-28 382 430 38 99 108 76 81

NBNHC135S 17 350 26-28 382 480 38 99 108 76 81

NBNHC140S 17 400 26-28 382 530 38 99 108 76 81

NBNHC145S 17 450 28-32 382 580 38 99 108 76 81

NBNHC150S 17 500 28-32 382 630 38 99 108 76 81

NBNHC160S 17 600 28-32 382 730 38 99 108 76 81

NBNHC126SX 25 260 24-26 453 385 45 126 127 92 83

NBNHC130SX 25 300 26-28 453 430 45 126 127 92 83

NBNHC135SX 25 350 26-28 453 480 45 126 127 92 83

NBNHC140SX 25 400 26-28 453 530 45 126 127 92 83

NBNHC145SX 25 450 28-32 453 580 45 126 127 92 83

NBNHC150SX 25 500 28-32 453 630 45 126 127 92 83

NBNHC160SX 25 600 28-32 453 730 45 126 127 92 83

NBNHC175SX 25 750 36 453 878 45 126 127 92 83

NBNHC130SXX 35 300 26-28 540 430 50 138 137 116 76

NBNHC135SXX 35 350 26-28 540 480 50 138 137 116 76

NBNHC140SXX 35 400 26-28 540 530 50 138 137 116 76

NBNHC145SXX 35 450 28-32 540 580 50 138 137 116 76

NBNHC150SXX 35 500 28-32 540 630 50 138 137 116 76

NBNHC160SXX 35 600 28-32 540 730 50 138 137 116 76

NBNHC175SXX 35 750 36 540 878 50 138 137 116 76

Note: The ‘S’ in the Stock Code denotes a Shackle head fitting, use ‘H’ for Hook head fitting or ‘T’ for Toggle block (no head fitting)

Stock WLL Sheave Suits A B C D E F G

Code tonnes Diameter Wire Ropemm mm mm mm mm mm mm mm mm

NBNSB116S 8.5 160 16-18 244 235 25 68 76 57 52

NBNSB120S 8.5 200 18-20 244 280 25 68 76 57 52

NBNSB125S 8.5 250 20-22 244 330 25 68 76 57 52

NBNSB130S 8.5 300 20-22 244 380 25 68 76 57 52

NBNSB116SX 12 160 16-18 311 307 32 83 82 66 57

NBNSB120SX 12 200 18-20 311 347 32 83 82 66 57

NBNSB125SX 12 250 20-22 311 397 32 83 82 66 57

NBNSB130SX 12 300 20-22 311 447 32 83 82 66 57

NSB Series

NHC Series

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Blocks & Swivels

TILT WALL SNATCH BLOCKS

Nobles blocks for Tilt Wall applications are manufactured in

accordance with AS 2089 with the addition of a roller thrustbearing in the head fitting. The roller thrust bearing is required byAS 3850 (Tilt-Up Concrete Construction)

Stock WLL Sheave Suits

Code tonnes Diameter Wire Ropemm mm

NBNTW12008 8.5 200 18-20

NBNTW12508 8.5 250 20-22

NBNTW12508RL 12 200 20-22

NBNTW13008RL 8.5 250 20-22

NBNTW12012 12 200 18-20

NBNTW12512 12 250 20-22

NBNTW12512RL 12 260 20-22

NBNTW13012RL 12 300 20-22

NBNTW12617 17 260 24-26

NBNTW13025 25 300 26-28

Note: “RL” denotes light weight nylon sheave

NDS SERIES SNATCH BLOCKS

Double snatch blocks are available in 10 and 25 tonne capacitieswith either a shackle or hook head fitting.

Stock WLL Sheave SuitsCode tonnes Diameter Wire Rope

mm mm

NBNDS216S 10 160 16-18NBNDS220S 10 200 18-20

NBNDS225S 10 250 20-22

NBNDS230S 10 300 20-22

NBNDS235S 25 350 26-28

NBNDS240S 25 400 26-28

Note: The 'S' on the end of the stock code denotes a Shackle head fitting,Use 'H' for Hook head fitting

NDS Block withHook Head Fitting

NMD Blocks arealso available indouble or treble

configuration

WARNING

Standard head fittings are not designed to swivel under load.Roller thrust bearings must be specified for head fittings, whichare required to swivel under load.

• Tilt wall lifting is a demanding application for sheave blocks.

• Always refer to AS 3850 when designing and rigging a tiltwall lift.

• Proper axial loading of blocks is essential. Always ensure noload is placed on a block until it is fully in line with the load.

• The security of the head fitting, axle nuts and their lockingdevices must be checked at least daily. Proper fitment of the

snatch pin must be checked prior to each lift.• Inspect the head fitting by ensuring the nut is fully threadedon and the threads locked.



Blocks & Swivels

RECOVERY BLOCKS

Nobles Bogger Blocks

Nobles Bogger Blocks are derived from our NSB range and aredesigned as a recovery block in mining operations. Bogger Blocksare used to form part of a block and tackle arrangement whichcan exert a pulling force up to 55 tonne.

WLL Sheave Suits A B C D E F G MassDiameter Wire Rope

tonnes mm mm mm mm mm mm mm mm mm kg

55 350 26 1058 320 184 63 50.5 25 81.5 225

Specifications

Bearings: Garmax PTFE CompositeSurface Finish: Blue PaintedSheaves: 3Becket: Lug TypeHead Fitting: Fixed Shackle

Heavy Vehicle Recovery BlocksNobles manufacture a range of Heavy Vehicle Recovery Blocksbased on the design of our NSB Series Toggle Blocks. This rangeof blocks were originally developed for and are used extensively

by the Australian Defence Forces.

Sheave SuitsStock WLL Diameter Wire RopeCode tonnes mm mm

NBNES115TDD 3.4 150 10-11

NBNSB115TR 8 150 13

NBNSB125TR 6.5 250 14-16

NBNHC125TDD 12.4 250 20-22

CG D

A

E

F

B

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Blocks & Swivels

HOOK BLOCKS

Crane Hook Blocks

Nobles Crane Hook Blocks are manufactured in accordance withAS 2089, have a 5:1 factor of safety and each block is proof loadtested at manufacture.

5 tonneWeighted

Hook Block

10 tonneSingle Sheave

Hook Block

Stock Code Description Lifting Point WLL

(tonnes)Tare(kg)

Counterweight(kg)

Hook Stock Code

NBNWH05 Weighted Hook Block Clevis Pin 5 47 - OFSHP63

NBNED130H Single Sheave Hook Block Single Sheave 10 65 30 (optional) OFSH150

Stock Code A(mm)

B(mm)

C(mm)

D(mm)

F(mm)

G(mm)

L(mm)

M(mm)

O(mm)

W(mm)

X(mm)

NBNWH05 195 160 310 30 73 71 476 47 48 32 120

NBNED130H 330 154 456 300 83 66 869 49 58 16 -



Blocks & Swivels

HOOK BLOCKS

18 kgSwivellingHeadache

Ball

3 kgHeadache Ball

Stock Code Type WLL

NYHAB18 18 kg Headache Ball 3.5 tonne

NYHAB05 3 kg Headache Ball 750 kg

Nobles Headache BallsThe NYAB18 18kg Swivelling Headache Ball complies with AS2318 and has a 5:1 factor of safety.

The NYHAB05 3kg Headache Ball is usually used with a Grade T7-8mm Swivel Latch Hook.

These Headache Balls are commonly used on drill rigs, have aspecial white painted surface finish and are proof load tested atmanufacture.

CAUTION

Nobles Headache Balls are designed to attach to the crane wirerope with a standard wire rope connection. AS 1418 prohibitsthe use of Headache Balls that bolt onto the wire rope andstipulates that Headache Balls shall be connected with astandard wire rope termination.

751 Series

752 Series

Crosby McKissick Overhead Travelling Crane

Fall BlocksThe Crosby McKissick Easy-Lift Overhead Travelling Crane FallBlocks are designed to provide a quality replacement block. Theblocks come in single and double sheave configurations and canbe assembled, tested and delivered with minimal delay.

The 751 Series - Single Sheave Blocks are available in capacities2 - 10 tonne to suit wire ropes 6.5 - 26mm diameter.

The 752 Series - Double Sheave Blocks are available incapacities 3 - 15 tonne to suit wire ropes 6.5 - 19mm diameter.

Other Features Include:

• Easy to reeve - removable housing allows blocks to be reevedwithout complete disassembly.

• Sheave PCD is minimum of 16 times rope diameter on

standard sizes.• All single point shank hooks are genuine Crosby forged alloy

steel hooks are quenched and tempered, have the QUIC-CHECK markings and come with a safety catch that integrateswith the hook tip.

• Sheave bearings are maintenance free and sealed for life(10,000 hours).

• Wide range of block assemblies available.

• Optional anti-two block device

• Optional shackle as lower connection point.

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HEADACHE BALLS



Blocks & Swivels

WIRE ROPE SHEAVES

Orders For Sheaves Should Specify

1. Dimensions:

A - Outside Diameter

F - Pitch Circle Diameter (PCD)

C - Rim Width

E - Bore for Centre pin or axle

D - Hub Width

G - Hub Diameter

2. Diameter & Type of Rope:Fibre or Wire Rope. For minimum sheave root diameters referto AS 2089.

3. Sheave Grooves

Sheaves should be grooved to the nominal rope diameter plusan allowance of between 7% and 15% to allow for ropemanufacturing tolerances and should be re-machined whenworn to nominal diameter plus 3%. Sheaves must also be freefrom score marks, run freely and be true.

4. Types of Bushing

Plain Bores

• Nobles Plain Bore Sheaves can be equipped with bushings or

bearings at an optional charge.• Cast Steel, Cast Iron, Machined Steel Plate and Nylon sheavesare all available.

Plain Bore Sheaves can be used for very low line speeds and veryinfrequent use (high bearing friction).

Bronze Bushes

Self Lubricating Bronze Bushings for slow line speeds andinfrequent use (moderate bearing friction). Bronze Bushing withpressure lubrication for slow line speeds, and more frequent useat greater loads (moderate bearing friction). Our Bronze Bushingsare machined with oil grooves.

Taper Roller Bearings

Taper Roller Bearings are required for faster line speeds and morefrequent use at greater loads.

Double Row Cylindrical Roller Bearings

These are specially designed for sheave applications having goodload bearing ratings and stability. Other Anti friction bearings suchas tapered roller bearings and deep groove ball bearings can be

supplied.

PTFE Lined BushesThese bearings have a high load capacity (140 Mpa) and low wearrates as well as excellent lubricating properties. The bearingshave a composite structure consisting of epoxy encapsulatedwound glass fibres impregnated with PTFE. They can be used atsurface velocities to 500 Sfpm (2.5 m/s). Other bearing types canalso be supplied where required.

A E

C

F

G

D

Shaft

Rim Hub

Shaft

Rim BearingWidth

Bore

Rim Hub



Blocks & Swivels

WIRE ROPE SHEAVES

Sheave Dimensions for Sheave Blocks

The Australian Standards AS 2089 and AS 1418 require that theratio of the diameter at the bottom of the groove of sheaves, tothe nominal size of the rope, shall not be less than:

1. For use with fibre ropes - 5 times rope diameter.

2. For use with wire ropes - M1 Classification - 11.5 times ropediameter.

3. For use with wire ropes - M3 Classification - 15.0 times ropediameter.

Rope Groove Depth

1. Fibre ropes - not less than 0.32 times the diameter ofthe rope.

2. For wire rope, the sheave groove shall not be less than therope diameter.

Sheaves For Crane Applications

Indicative overall diameters based on groove depth of 1.5 ropediameter

Sheave Material

SG Iron (Nodular or Ductile Iron) AS 1831Standard grade supplied has tensile equal to C3 steel. Wear andload carrying capacity is superior to cast iron but slightly less thansteel.

Cast Steel AS 2074Unless otherwise specified C3 grade supplied.

Steel Plate AS 3678 - Grade 250Grade 350 available in some thicknesses - 16mm to 300mmthick.

Classification of Sheaves Rope EqualizerMechanism (hs) Sheaves (hs)

M1 12.5 11.2

M2 14 12.5

M3 16 12.5

M4 18 14

M5 20 14

M6 22.4 16

M7 25 16

M8 28 18

Minimum Ratio Of Sheave Pitch Diameter To

Wire Rope Diameter (AS 1418.1)

Minimum M1 M2 M3 M4 M5 M6 M7 M8Ratio Pitch

Dia. to

Wire Rope Dia 12.5 14 16 18 20 22.4 25 28

Minimum

Overall Dia.(ratio) 14.5 16 18 20 22 24.4 27 30

Wire Rope Dia

8 116 136 150 160 180 200 220 250

9 136 150 162 180 200 220 253 270

10 150 160 180 200 220 250 270 300

11 160 180 200 220 250 270 300 330

12 180 200 220 250 270 300 330 380

13 200 220 250 270 300 330 353 400

14 203 250 252 300 330 350 380 450

16 250 270 300 330 352 400 450 500

18 270 300 330 380 400 450 500 550

20 300 330 380 400 450 500 550 600

22 330 352 400 450 500 550 600 660

24 350 384 450 500 550 600 650 750

26 380 450 500 550 580 650 700 800

28 450 500 504 580 650 700 800 880

32 500 550 580 650 700 800 880 1000

36 550 580 650 750 800 880 1000 1080

No mandatory sheave groove depth applies for crane application sheaves(AS 1418) and a groove depth of 1.5 rope diameter times is considereda minimum.

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Blocks & Swivels

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WIRE ROPE SHEAVES

Stock Outside Wire Rope A B C D E F Min G Dia H Min ICode Dia. Dia. (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm)

BS0W063 63 5 63 12.5 19.5 20.5 50 5 5.5 8.5 12

BS0W075 75 6 75 12.5 19.5 20.5 60 4 6.5 9.5 12

BS0W100 100 8 100 19 24.4 25.4 80 5 8.5 12 17

BS0W125 125 10 125 22 27.5 29.5 100 4 10.5 14.5 20

BS0W150 150 12 150 25 31.4 33.4 120 5 12.5 17 23Note: Pitch Circle Diameter (P.C.D.) = dimension E + Rope Dia.

The Nobles range of BS Series Wire Rope Sheaves are manufacturedfrom machined cast iron. The sheaves are designed for manualoperation such as lever and chain hoists and come complete withbronze bushes as standard. Nobles sheaves are zinc coated to resistcorrosion and ensure the longest possible service life.

Cross Section of Wire Rope

Section View

BS Series Sheaves



Blocks & Swivels

SHEAVE & FRAME ASSEMBLIES

Nobles Sheave and Frame Assemblies are available in a range of

sizes to suit loadings and rope diameters as required. Single ordouble arrangements can be manufactured. Standard Noblessheaves can be used or application specific sheaves and framescan be designed. NFF Series Double Row Roller Bearings aresupplied as standard but other bearing or bushing options are

Horizontal Lead Sheaves arealso available upon request.Specifications to be advised

at time of enquiry.

Type RD(mm)

OD(mm)

A(mm)

C(mm)

D(mm)

E(mm)

F(mm)

G(mm)

H(mm)

L(mm)

d(mm)

NQty

S(mm)

T(mm)

W(mm)

Mass(kg)

TSH200 200 255 35 - 150 130 45 54 175 230 23 4 10 16 190 23

TSH250 250 320 40 - 180 150 55 64 215 280 23 4 10 16 220 50

TSH315 315 395 45 - 230 160 62 76 270 330 27 4 12 16 240 53

TSH350 350 440 70 - 360 220 64 73 315 450 33 4 12 16 300 87

TSH400 400 470 70 - 360 220 64 73 315 450 33 4 12 16 300 88

TSH500 500 610 85 - 440 240 78 86 390 570 33 4 16 20 320 164

TSH630 630 730 90 135 380 280 78 86 455 760 33 8 16 25 360 246

TSH710 710 800 120 135 460 320 94 97 495 840 33 8 16 25 400 330

TSH800 800 920 130 155 490 340 108 111 540 930 33 8 16 25 420 440

TSH864 864 984 140 170 570 380 108 128 532 1030 39 8 20 20 460 590

TSH900 900 1020 140 170 570 380 108 111 590 1030 39 8 20 28 460 590

TSH1000 1000 1120 140 280 560 290 100 137 716 1250 39 10 25 50 400 770

TSH1102 1102 1240 140 280 560 290 100 137 716 1250 39 10 25 50 400 960

ANCHOR FAIRLEADERS

Nobles Anchor Fairleaders are made of high quality materials andare built tough to withstand the breaking load of the nominatedrope at all orientations. Specifications including base plates andsurface finish can be altered to suit installation requirements.We can custom design anchor fairleaders to suit any normal ropediameter.

Nobles Anchor Fairleaders feature:

• Handling lug for easy installation

• Galvanised sheaves that can be hardened on request

• SL04 sealed sheave bearings• Pivoting head with hardened side plates

• Rounded lip bead to ensure longer rope life

• Sealed greased housing with heavy duty taperedroller bearings

available. Surface finishes can also be specified at the time of

enquiry. A rope guard is supplied to prevent slack ropes fromleaving the sheave, which can be mounted in 3 different positions.400-15 SG iron is used as standard for sheaves, and grade 250steel for the frame. Other materials available for higher strengthand wear applications.



Blocks & Swivels

SBS SWIVELS

Nobles SBS Swivels are a rugged and relatively compact lifting

device incorporating a roller thrust bearing which is containedwithin a greasable chamber at the centre. The bearing is betterprotected from the elements than other designs and permits easyrotation under load.

Sealing

Sealing is achieved by an O-ring at one end and a seal at theother (type varies with size).

Jaw Bolts

Jaw bolts are retained with a nut and split pin for safety andadded strength.

Care in UseSBS Swivels form an important component in lifting systemswhere loads must be swivelled under load. They are also used

where parts of a lifting system must be protected from inducedtorques by being able to freely rotate.

SBS Swivels are for use in lifting situations appropriate to theAS 2318. They are not for use in high speed or continuousrotation applications such as being in-line with rotating machinery.The recommended duty cycle of SBS Swivels should beconsidered equivalent to M3 classification. Custom designs can beproduced for heavy duty applications.

General Cautions

Ratings or Working Load Limits (WLL) shown in Nobles literatureand stamped onto swivels apply only to new or as new conditionproducts. The working load limit can be affected by intentionalalterations, damage, corrosion, misuse and special conditions of use. Always have your swivels regularly inspected by a competentperson who may suggest repairs or condemn your swivels.

Shock loading can greatly increase the actual loads placed on aswivel and must be taken into account when selecting swivelsystems.

The WLL that applies to any Nobles swivel is only for the useof the device for general purpose lifts as defined in AS 1418(M3 classification) in accordance with safe practice and Noblesrecommendations. For all uses of swivels a risk assessmentshould be performed to analyse potential hazards. Where users

intend using swivels for unconventional tasks these should beassessed in detail by a competent person.

For each lift always assess the strength and integrity of the loaditself. Attention must be paid to the balance and security of theload.

Never weld any part of a swivel without consulting Nobles.Special steels are commonly used and special welding proceduresand precautions may be necessary.

WARNING

• Never exceed the Working Load Limit.

• Always ensure that the correct sling angles and sizes are used.

• Never hoist loads over or near people.• Always operate, inspect and maintain the swivel in accordance

with relevant safety standards.

• Always check the security of the load before lifting.

• If you are ever in doubt how to safely use this product contactyour NEAREST Nobles branch for advice.

• Improper use of this product could result in serious injuryor death.

For Axial TensileLoading Only

DO NOT Load inCompression

DO NOT Load inBending

B l o c k s &

S w i v e l s



W.L.L. A B C D E F G H J K L M N O P Q R S Ttonnes

3 276 221 224 225 291 126 76 19 19 41 35 34 33 25 35 19 23 29 25

5 341 262 267 275 349 166 81 22 25 57 45 42 41 29 46 25 32 32 32

8.5 433 331 341 347 439 192 102 30 40 71 53 52 54 35 66 32 36 41 38

10 511 435 438 445 514 192 114 38 44 86 53 52 89 44 66 43 43 70 48

16 587 462 471 481 597 221 127 38 44 86 65 57 89 44 76 49 52 70 54

25 679 527 532 537 685 346 152 52 51 114 87 92 94 60 93 57 59 98 60

35 760 527 532 537 765 392 165 52 51 114 120 108 94 60 129 57 59 98 60

42.5 891 638 641 641 891 392 178 59 64 127 120 108 102 76 129 64 64 102 76

55 - - - 718 - - 190 65 64 - - - 100 85 - 102 75 100 110

85 - - - 822 - - 260 83 77 - - - 135 123 - 110 87 135 104

Jaw & Hook Eye & Eye Jaw & Jaw Jaw & Eye Eye & Hook

Blocks & Swivels

Nobles SBS swivels feature:

• Safety factor of 5 to 1.

• All hooks come complete with safety catches and jawswith bolts.

• Swivels are positively and permanently sealed.

• Individually proof tested at manufacture to twice WorkingLoad Limit.

• NATA Test Certificate issued.

SBS SWIVELS

NOBLES SEALED BEARING SWIVELS SBS SERIES

Stock Code WLL tonnes

NJSBS030XX 3.0

NJSBS050XX 5.0NJSBS085XX 8.5

NJSBS100XX 10.0

NJSBS160XX 16.0

NJSBS250XX 25.0

NJSBS350XX 35.0

NJSBS450XX 45.0

Note: XXJaw & Hook = JHJaw & Jaw = JJJaw & Eye = JEEye & Eye = EEEye & Hook = EH

Example: 5t Jaw & Hook = NJSBS050JH

Eye & Eye SBS Swivel

Jaw & Eye SBS Swivel

Jaw & Jaw SBS Swivel

Dimensions in mm

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B

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K

J

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G

SR

T

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10 blocks swivels

Documents