q420 handbook of metric gears

7/27/2019 Q420 Handbook of Metric Gears

1/525


2/525II

Company History

Started in 1993, Quality Transmission Components is anoperating division of Designatronics, Inc. Since its inceptionin 1960, Designatronics serves a worldwide customer base in

excess of 15,000 firms ranging from Fortune 100 companiesto individual inventors. The company occupies 139,000 sq.ft. of warehouse and manufacturing space on Long Island,New York.

In 1993, the combination of an ever-increasing demandfor metric gears and a strong growth in demand for powertransmission products spawned Quality TransmissionComponents. Designatronics capitalized on its relationshipwith Kohara Gear (KHK), and Quality TransmissionComponents became the exclusive North American distributor

of their complete product line. In 2006, Quality TransmissionComponents shipped over 30,000 metric gears to users,making us the largest supplier of stock metric gears in theUnited States.

In 2000, Quality Transmission Components saw theopportuni ty to expand our product line. We added theZetasassi line of belt and chain tensioners. We then addedneoprene timing belts, aluminum, steel and nylon timingpulleys, roller chain and planetary gearheads. We alsobecame a distributor ofDavall Stock Gears representingtheir inch gear line in the North American marketplace. All

of these products are marketed under the Econobelt brandname.

Quality Transmission Components' selection of off-the-shelfpower transmission components now includes almost 13,000items including:

Metric Spur Gears Metric Helical Gears Metric Ring Gears (Internal & External) Metric Racks (Straight, Helical & Flexible) Metric Miter Gears (Straight & Spiral) Metric Bevel Gears (Straight & Spiral) Metric Screw Gears Metric Worms & Worm Wheels (Standard & Duplex) Metric Ratchets & Pawls Metric Gear Couplings Metric Involute Splines (Internal & External) Metric Gearboxes


3/525II I

MXL Timing Belts (Neoprene) XL Timing Belts (Neoprene) L Timing Belts (Neoprene) HTD3 Timing Belts (Neoprene) HTD5 Timing Belts (Neoprene) HTD8 Timing Belts (Neoprene) AT5 Timing Belts (Neoprene) AT10 Timing Belts (Neoprene) T2.5 Timing Belts (Neoprene) T5 Timing Belts (Neoprene) T10 Timing Belts (Neoprene) MXL Timing Pulleys (Steel & Aluminum) XL Timing Pulleys (Steel, Nylon & Aluminum) L Timing Pulleys (Steel, Nylon & Aluminum) HTD3 Timing Pulleys (Steel, Nylon & Aluminum) HTD5 Timing Pulleys (Steel, Nylon & Aluminum)

HTD8 Timing Pulleys (Steel, Nylon & Aluminum) AT5 Timing Pulleys (Steel & Aluminum) AT10 Timing Pulleys (Steel & Aluminum) T2.5 Timing Pulleys (Steel & Aluminum) T5 Timing Pulleys (Steel & Aluminum) T10 Timing Pulleys (Steel & Aluminum) Tensioner Arms Belt Tensioners Chain Tensioners Idlers Rollers Sprockets (ISO Class) Roller Chains (ANSI & ISO Class)

Diametral Pitch Spur Gears Diametral Pitch Racks Diametral Pitch Miter Gears (Straight & Spiral) Diametral Pitch Bevel Gears (Straight & Spiral) Diametral Pitch Worms & Worm Wheels Planetary Gearheads Belt Tension Meters

All of the products listed in bold are available from thiscatalog. The other products are detailed on our Web site,www.econobelt.com and the print catalog Q460.

QTC PART NUMBERSFor internal processing purposes, QTC part numbers, listed inthis catalog, will have a "K" prefix listed on all paperwork.This "K" does not appear in the catalog, but will appear inour online eStore and on all of our 3D CAD drawings.

Company History


4/525IV

Table of Contents

Page

1SpurGears ..........................................................................25

2HelicalGears .....................................................................129

3InternalGears....................................................................147

4Racks.................................................................................153

5CPRacks&Pinions ..........................................................179

6MiterGears........................................................................1937BevelGears......................................................................227

8ScrewGears......................................................................277

9WormGearPairs...............................................................291

10OtherProducts ..................................................................349

ElementsofMetricGearTechnology.........................................T1

Appendix .....................................................................................A1


5/525V

Terms and Conditions of Sale

As used herein, "Seller" means Qual i tyTransmission Components. "Buyer" means anyperson ordering goods from Seller after March

31, 2006; and "person" means any individual,corporation, company or other entity.

ORDERING: Goods may be ordered by:(a) Telephone to: (516) 437-6700(b) Fax to: (516) 328-3343(c) Mail to: 125 Railroad Avenue, Garden City

Park, NY 11040-5016(d) UPS/other courier to: same as above(e) E-mail to: [email protected]

Office hours are 9am 5pm, EST, Monday Friday. You may fax (516) 328-3343 or E-mailto : [email protected] at any time.When ordering, specify part numbers, quantities,desired delivery date and shipping method. Forlarger production quantities, Seller will providewritten quote of price and delivery on request.Seller will provide current price/stock status onany catalog item by telephone or fax request.Quotes for modified catalog parts or custom-made parts are available on request. Please sendsketches or prints.

MINIMUM ORDER:Orders shipping to addresses within the USA,$50 + freight. Orders shipping outside of theUSA, $75 + freight. There is an additionalcharge of $10.00 for orders below the minimum.There is no minimum order size for eStore onlineorders.

PRICES:Prices shall be as in effect at time of purchase

order or as agreed to in writing by Seller. Priceslisted in its catalog or elsewhere are subject tochange without notice. Please contact Sellerto confirm price. Prices do not include freight,duties, special handling, certification, insuranceor taxes, which are all the Buyer's responsibility.

CREDIT:Bank and three trade references are required fornew accounts. Until the account is approved, the

Seller may require cash in advance, payment byapproved credit card or C.O.D.; C.O.D. ordersare subject to an additional handling charge.

TERMS:For open accounts, terms are net 30 days,F.O.B. our plant. Open accounts are invoicedfor goods/freight when shipped. Seller acceptsVISA, Master Card, American Express, andDiscover. Buyers paying by credit card arecharged for goods/freight when shipped, subject

to credit card approval. All past due amountsshall bear interest at one and one-half percent(1.5%) per month or the highest legal rate,whichever is less; and Seller may recover all costs,including attorneys' fees, incurred to collect anypast due amount.

SHIPMENT; RISK OF LOSS:Seller will ship goods as directed by the Buyeror determined by the Seller, usually UPS, DHL orFedEx; in any case at the Buyer's expense. Sellerwill endeavor to meet promised delivery dates.

Buyer shall bear all risk of loss and damage aftergoods are delivered to carrier, including any lossor damage in transit.

RETURNS; EXCHANGES; SHORTAGES:Buyer must get return authorization in writing.Seller must approve returns and exchanges inwriting. Returns must be requested within 15 daysafter receipt of goods. Returned goods will beinspected and a restocking charge may be made.No credit will be allowed on custom-made,

used or modified parts or parts purchased on aquantity basis. Shortages must be reported within10 days after receipt; and if so reported, Sellerwill make up shortages at its cost.


6/525

Terms and Conditions of Sale

TECHNICAL & PRODUCT INFORMATION:Seller disclaims responsibility for errors oromissions in any technical or product information

contained in its catalogs or other sales materials.Buyer is solely responsible for determining ifgoods are suitable for purposes intended byBuyer and its customers and future users.

LIMITED WARRANTY:Seller warrants that all goods it sells will befree from material defects in manufacturing andworkmanship by Seller: PROVIDED THISLIMITED WARRANTY SHALL EXPIRE ONE(1) YEAR AFTER SHIPMENT F.O.B. OUR

PLANT (the "Warranty Period") ANDSHALL NOT APPLY:

(a) unless Seller receives written notice ofthe breach of warranty within 30 days afterdiscovery of the defect or nonconformance andin any event within the one (1) year WarrantyPeriod; and(b) to any goods which have been (i) repaired,altered or improperly installed, (ii) subject toimproper storage, (iii) damaged during or aftertransit, (iv) used or incorporated with or into anyother product, machine or equipment after Buyeror anyone using the goods has, or reasonablyshould have, knowledge of the defect or non-conformance, or (v) manufactured, fabricated toassembled by anyone other than Seller.

ALL OTHER WARRANTIES, EXPRESSEDOR IMPL IED, INCLUDING IMPL IEDWARRANTIES OF MERCHANTABILITY ANDFITNESS FOR PARTICULAR PURPOSE, AREDISCLAIMED.

BUYER'S REMEDIES:At Sellers option, if it breaches the warranty setforth above, it may either (a) repair or replacedefective or nonconforming goods or parts or (b)repay the price it received for goods, whicheverit elects. As a condition precedent to eitherremedy, Buyer shall have paid the price of thegoods and made them available for inspectionat Buyer's place or business or returned themat Seller's request and cost and by the carrier

it designates. BUYER SHALL HAVE NOOTHER REMEDY AGAINST THE SELLER,AND ALL OTHER REMEDIES ARE WAIVED,

INCLUDING ANY RIGHT TO RECOVERCONSEQUENTIAL OR INC IDENTALDAMAGES. The limited warranty set forth aboveand these remedies shall extend only to Buyerand not to any subsequent buyer or user of thegoods. In no event shall Seller's liability forbreach exceed the price paid for by the goods byBuyer.

GOVERNING LAW; EXCLUSIVEJURISDICTION:

This contract shall be governed by the substantivelaws of New York, without regard to choiceof law principles. The State and FederalCourts in Nassau County, New York,shall have the exclusive jurisdiction andvenue to adjudicate rights and dutiesunder this contract.

PERIOD OF LIMITATIONS:An action for breach of this contract, includingbreach of the limited warranty set forth above,or any other action relating to goods shipped by

Seller or ordered by Buyer, must be commencedwithin one (1) year after the cause of actionaccrued.

MISCELLANEOUS:All orders placed with Seller after March 31,2006, constitutes acceptance of these Termsand Conditions. All conflicting, inconsistent andadditional terms and conditions are rejectedunless contained in writing and signed by anofficer of Seller. Buyer may not assign any rights

or remedies under this contract without Seller'sprior written consent. If any part or provision ofthese Terms and Conditions is held to be invalidor unenforceable, such part or provision shallbe deemed omitted, and that shall not affect thevalidity or enforceability of any other part orprovision hereof. These Terms and Conditionsmay be found at:

www.qtcgears.com/eStore/termsofuse.aspx.

VI


7/525VI I

SSAY1SSAY1-../K..SSCPSSCPG

SSCPGSSSG1-SSG1.5-SSG2-SSG2.5-SSG3-SSG4-SSGSSSRSSRSSY0.8-SSY1-SSY1.25-STRCPFSUBSUMSUNSURSURCPFSURCPFDSURFSURFDSUROSUS1SUS2SUS3-SUS4-SUSA2SUSA3-SUSA4-SUSCP

SUSL0.5-SUSL0.8-SUSL1-SUW1SUW2SUW3-SVSVISW0.8-SW1-SW1.25-SW1.5-SW2-SW2.5-SW3-SW4-SW5-SW6-SWG1SWG2SWG3-SWG4-SWG5-SWG6-

KRGCPDKRGCPFKRGDKRGF

KRHGKRHGFKSPKTSCPKWG0KWG1KWG2KWG3-KWG4-KWG5-KWG6-KWGDL2-KWGDL2.5-KWGDL3-KWGDL3.5-KWGDL4-KWGDLS2-KWGDLS2.5-KWGDLS3-KWGDLS3.5-KWGDLS4-LMLS0MBSAMBSBMBSGMHP1MMMMSMMSAMMSB

MMSGMSGA1-MSGA1.5-MSGA2-MSGA2.5-MSGA3-MSGA4-MSGB1-MSGB1.5-MSGB2-MSGB2.5-MSGB3-MSGB4-NSU1-NSU1.5-NSU2-NSU2.5-NSU3-PBPBX-PG1PG2PG3-PMPNPR

AG0AG1-AG2AG3-

AG4-AG5-AG6-AGDL2-AGDL2.5-AGDL3-AGDL3.5-AGDL4-AGF2AGF3-AGF4-AGF5-AGF6-ANARL-BBBG0.8-BG1-BG1.25-BG1.5-BG2-BG2.5-BG3-BG4-BG5-BG6-BSRBSS0CBX-CG1-CG1.5-

CG2-CG2.5-CG3-CG4-CG5-CG6-DBDMDRDS0DS1-DSL0.5-DSL0.8-DSL1-FRCP5-GCKBX-KHG1-KHG1.5-KHG2-KHG2.5-KHG3-KRCPFKRFKRGKRGCP

PRFPS1-PS1.5-PS2-

PS2.5-PS3-PSA2-PSA2.5-PSA3-PUSAMSBSBSSBSGSBY5-SBY6-SBY8-SHSISIRSMSMASMBSMCSMSSMSGSN1-SN2-SN2.5-SN3-SN4-SRSRCPSRCPFSRCPFD

SRFSRFDSRGFSRHSROSROCPSROSSRS-SRTSRTBSS1-SS1.5-SS10-SS2-SS2.5-SS3-SS4-SS5-SS6-SS8-SSA1SSA2SSA3-SSA4-SSA5-SSAY0.8-../K..

310312, 320

322324

324326326300302304306308314316316318318286174

226, 266328328330330332334336338340342172126364328330

332334336338340342266226174122124104106106192352360134136138140142188165162184

184184162162

176176270-275

18231031231431631631831830030230430630830030230430630821692

240-246240-246

236234216206204204

200343638404244343638404244

108110110112112264368344346346224288173

173116118118

120120118120120114220

252-260248, 250

238258258

254, 256144150

151,169218

212, 214212, 214

212208, 210

202280280282282282166188188188

167168164178175192175174350350

60627464666870727474767880808088

8690

186184

18446485052545658

127168828284

18226222228417019019017017017594969898969898

190

100102102344346346354355328328330330332334336338340342320322324324326326

Part Number Index


8/525

Q420 INDEX 1.

VIII

SPUR GEARS

HELICAL GEARS

INTERNAL GEARS

MSGA(B) Ground SpurGears

Page 34

SSG Ground Spur Gears

Page 46

SSGS Ground SpurPinion Shafts

Page 58

SS Steel Spur Gears

Page 60

SSA Steel HublessSpur Gears

Page 76

SSY Steel Thin Face SpurGears

Page 82

SSAY Steel Hubless,Thin Face Spur Gears

Page 86 Page 88

LS Sintered MetalSpur Gears

Page 92

SUS . SUSA StainlessSteel Spur Gears

Page 94

SUSL Stainless SteelFairloc Hub Spur Gears

Page 100

DSL Acetal Fairloc HubSpur Gears

Page 104

NSU Plastic Spur Gearswith Steel Core

Page 108

PU Plastic Spur Gearswith Stainless Steel Core

Page 114

PS and PSA Plastic SpurGears

Page 116

DS Injection Molded SpurGears

Page 122

BSS Brass Spur Gears

Page 124

SSR Steel Ring Gears(External)

Page 126 Page 127

KHG Ground HelicalGears

Page 134

SH Helical Gears

Page 144

SI Internal Gears

Page 150

SIR Ring Gears (Internal)

Page 151

PICTORIAL INDEX OF SPUR, HELICAL AND INTERNAL GEARS

New Products

BB Sintered MetalBushings

Parallel Axes Gears

SSAY/K Spur Gears withBuilt-In Clamps

m1~4 m1~4 m1.5~3 m1~10

m1~5 m0.8~1.25 m1~1.25 m0.8~1 m0.5~0.8

m1~4 m0.5~1 m0.5~1 m1~3 m1~2

m1~3 m0.5~1 m0.5~0.8 m2~3

m1~3 m2~3

m1~3 m2~3

5~8


9/525

Contents

RACKS

RACKS & PINIONS

SR(F) Racks

Page 166

SRFD Racks withBolt Holes

SSR Corner Racks(External)

Page 168

SIR Corner Racks(Internal)

Page 169

SUR(F) Stainless SteelRacks

Page 170

KRG(F) Ground Racks

Page 162

KRGD Ground Racks

Page 162 Page 164

KRF Racks withMachined Ends

Page 165

Page 170

BSR Brass Racks

Page 172

PR(F) Plastic Racks

Page 173

DR Molded FlexibleRacks

Page 174

ARL Rack Guide RailsSRS Rack Clamps

Page 174

SRO Round Racks

Page 175

SROS Round Racks

Page 175

SURO Stainless SteelRound Racks

Page 175

KRHG(F) Ground HelicalRacks

Page 176

KTSCP Tapered PinionsSTRCPF Tapered Racks

Page 182

SSCPG(S) CP GroundSpur Gears

Page 184

KRGCP(F)(D) CP GroundRacks

Page 184

SSCP CP Spur Gears

Page 186

SRCP(F)(D) CP Racks

Page 188

KRCPF CP ThermalRefined Racks

Page 188

SUSCP CP Stainless Spur GearsSURCPF(D) CP Stainless SteelsRacks

Page 190

SROCP CP Round Racks

Page 192

FRCP CP Metal FlexibleRacks

Page 192

PICTORIAL INDEX OF RACKS AND CP RACKS

Please request catalogs by e-mail or fax.

IX

SRH Helical Racks

Page 178

CP

SRGF Ground Racks

Page 168

SURFD Stainless SteelRacks

Parallel Axes Gears

m1~10 m1.5~6 m2~3 m2~3 m1~4

m1~3 m1~3 m1.5~4 m1.5~5

m1.5~4 m0.5~1.25 m1~3 m0.8~2 m0.8~2

m1~6 m1~3 m1~3 m1~3 m2~3

CP5,CP10 CP5,CP10 CP5,CP10 CP2.5~CP20

CP2.5~20 CP5,CP10 CP5,CP10 CP2.5~10 CP5

New Products

New Products

New Products


10/525X

Q420 INDEX 2.

MITER GEARS

BEVEL GEARS

Nissei KSP Ground SpiralMiter Gears

Page 270

MMSG Ground SpiralMiter Gears

Page 200 Page 202

MMSA(B) Finished BoreSpiral Miter Gears

Page 204

MMS Spiral Miter Gears

Page 206

SMS Spiral Miter Gears

Page 208

SMA(B)(C) Finished BoreMiter Gears

Page 212

MM Carburized &Hardened Miter Gears

Page 216

LM Sintered MetalMiter Gears

Page 216

SM Miter Gears

Page 218

SAM Angular MiterGears

Page 220

SUM Stainless Steel MiterGears

Page 222

PM Plastic Miter Gears

Page 224

DM Injection MoldedMiter Gears

Page 226

MHP High Ratio HypoidGears

Gear Ratio 15~200 Page 234

MBSG Ground SpiralBevel Gears

SBSG Ground SpiralBevel Gears

Gear Ratio 1.5~3

MBSA(B) Finished BoreSpiral Bevel Gears

Gear Ratio 1.5~3

SBS Spiral Bevel Gears

Gear Ratio 1.5~4

SB Bevel Gears

Gear Ratio 1.5~4

SB.CB Bevel Gears

Gear Ratio 1.5~4 Gear Ratio 2~4

SUB

00

PB Plastic Bevel Gears

Gear Ratio 1.5~3

DB Injection MoldedBevel Gears

Gear Ratio 2

BB Sintered MetalBushings

5~8

Intersecting Axes Gears

PICTORIAL INDEX OF MITER AND BEVEL GEARS

Gear Ratio2

m1/1.51/31/1.51/3

Page 272Gear Ratio1.5~2

SB Bevel Gears & PinionShafts

Gear Ratio 5

SUB Stainless SteelBevel Gears

Gear Ratio 1.5~3

SMSG Ground SpiralMiter Gears

Nissei KSP GroundSpiral Bevel Gears

SBY Bevel Gears

Page 236 Page 238

Page 240 Page 248 Page 254Page 254Page 252

Page 260 Page 262 Page 264 Page 266 Page 266

m1.5~3

m1.5~6 m2~4 m2~5 m1~10

m2~5 m1~8 m1~8 m2~5 m0.8~1.5

m1~8 m1~3 m1~4 m0.5~1.5

m1~1.5 m2~5 m2~4 m2~4

m1~5 m1~6 m1~8 m5~8m1~6

m1.5~3 m1~3 m0.5~1m1.5~3

New Products

New Products

New Products


11/525XI

Contents

SCREW GEARS

WORM GEAR PAIR

OTHER PRODUCTS

SN Steel Screw Gears

Page 280

SUN Stainless SteelScrew Gears

Page 284

AN Aluminum-BronzeScrew Gears

Page 286

PN Plastic Screw Gears

Page 288

KWGDL, AGDL DuplexWorms & Worm Wheels

Reduction Ratio 1/20~1/60

KWGDLS, AGDLDuplex Worm Shafts &

Worm Wheels


KWG, AG Ground WormShafts & Worm Wheels

KWG, AGF Ground WormShafts & Worm Wheels


SWG, AG Ground Worms& Worm Wheels

Page 320

SW, BG Worms & BronzeWorm Wheels


SW, CG Worms & GrayIron Worm Wheels

SUW, PG Worms &Plastic Worm Wheels

KBX Bevel GearboxesSV Involute Spline ShaftsSVI Spline Bushings

Page 354

CBX Bevel Gearboxes PBX Miniature BevelGearboxes

PICTORIAL INDEX OF SCREW GEARS, WORMS, WORM GEARS

AND OTHER MISCELLANEOUS PRODUCTS

Please request catalogs by e-mail or fax.

Model L

Model T

SRT(B) Pawls & Ratchets

Page 350

GC Gear Couplings

Page 352


Nonparallel & NonintersectingAxes Gears

Page 300 Page 300 Page 310 Page 314

Reduction Ratio 1/10~1/60 Page 328 Reduction Ratio 1/10~1/120 Page 328 Reduction Ratio 1/10~1/50 Page 344

Speed Ratio 1/1~1/2 Page 358

Speed Ratio 1/1~1/2 Page 362 Speed Ratio 1/1 Page 366

Model L

Model T

Model L Model T

New Products New Products

m1~4 m1~3 m1~4 m1.5~3

m1.667P2.09~12.56 m2~2.5

m2~4 m2~4 m0.5~1.5 m2~6

m1~6 m0.8~6 m0.8~6 m1~3


12/525XI I

How to Use This Catalog

This catalog contains the followinginformation: Tabulated dimensions of KHK Standard Stock Gears

Data for selecting gears and warnings when applicable

Basic theories of gearing and associated data

How to order KHK Gears

Introduction to Kohara Gear Industry Co. Ltd.

Caution in selecting the mating gears

Caution in selecting gears based on gear strength

Unique characteristics of products (such as

availability to perform secondary operations)

Other points to consider in the selection process.

Caution in performing secondary operations

Caution in assembling

Notes on starting operations

Other points to consider in applications

KHK Stock Gears are categorized into 10 groups

as shown below. At the beginning of each group,

we present an explanation of part numbers,

selection and application hints and other useful

technical data. As a rule, each product series

consists of two facing pages containing product

name, part numbers, dimensions, photograph,

mechanical drawings, cautionary notes if

applicable and helpful hints.

1. Spur Gears

2. Helical Gears

3. Internal Gears

4. Racks

5. CP Racks & Pinions

6. Miter Gears

7. Bevel Gears

8. Screw Gears

9. Worm gear pair

10. Other Products

TECHNICAL REFERENCES

PRODUCT GROUP ICON SERIES DESIGNATION PRODUCT NAME MODULE

PRODUCT PHOTOGRAPH

Drawing & Co

INDEX

NOTES

DIMENSIONAL TABLE

LEFT PAGE

It is a representative photographof the series. Actual shape maybe different for a particular item.Please confirm the drawing andshape as specified in the table.

The bore tolerances are indicatedin the column headings.

Contains additional informationaugment the products table. Please rthem before making the final selecof the products.

Please order KHK gears byspecifying their catalog numbers

SUBCATEGORY OF THE SERIES

Module, Pitch, Number of teeth,Gear ratio, etc.

Contents

Some technical information isintroduced at various points in thecatalog.

Tabs are color coded, and seriesdesignations are shown.

Product Groups of KHK Stock Gears

Every page contains all the data necessary for you to select the proper gears.


13/525XIII

Contents of the Q420 Catalog

Calculation of Allowabletorque

RIGHT PAGE

PRODUCT NAME

DRAWINGS, SHAPES

SPECIFICATIONSWhen there is more thanone configuration for theseries, please confirm thedesired shape by checkingthe shape column in thetable.

The allowable torques shown in the table arethe calculated values according to JGMA.The calculations assume certain operatingconditions. Therefore, the values should only beused as a reference.The assumed conditions are shown on the firstpage of each product group (for example, page27 for spur gears).

There are some pages where certain dimensions are written below the table.(e.g., miter, bevel and worm gears)

Specifications for spur and helical gearsfollow the new JIS standard.

The datum reference for secondaryoperations.

KHK Co. reserves the right to make changes in specifications and dimensions without notice.

The company disclaims responsibility for any error or omission regarding technical and product information published.

All rights reserved herein and no portion of this catalog may be reproduced without the prior consent in writing of the company.

WepostanychangesandcorrectionstothecatalogonourWebsite(s): URL http://www.khkgears.co.jp/

URL http://www.qtcgears.com

DIMENSIONAL TABLE

Indicates the circular linear backlash when the gears are set to thecenter distance.

Shape

B4B3

B4B3

TECHNICAL REFERENCES

Significant technical informationis presented at various points inthe catalog.

Shows if secondary operations are possible.(Red box indicates i tems on whichsecondary operations are not possible.)


14/525XI V

Definition of Surface Durability

Please refer to this page when you are selecting gears.

Selecting Gears Based on Gear Strength

Approximate the type of gear, strength and torque load.

The allowable bending strength of a gearis defined as the allowable tangential forceat the pitch circle based on the mutuallyallowable root stress of two meshing gearsunder load.

The surface durability of a gear is defined asthe allowable tangential force at the pitch circle,which permits the force to be transmitted safelywithout incurring surface failure.

Make a tentative selection based on the torque load using the KHK catalog or the Web catalog.

The KHK catalog is used for the tentative selection. The Web catalog is used for the tentative selection.

The formal strength calculation can be performed using the variousformulas.

If the Web catalog is used, the strength can beeasily confirmed.

Example of the failure due toinsufficient bending strength.

Example of the defacementdue to insufficient surfacedurability.

After calculating the required strength using the actual conditions of usage, examine the selection made in Step 2.

Step 1

Step 2

Step 3

Definition of Bending Strength

(2) Equation - Bending StrengthIn order to confirm an acceptable safe bending strength, it isnecessary to analyze the applied tangential force at the workingpitch circle, Ft, vs. allowable force, Ftlim. This is stated as:

Ft Ftlim (1.4)It should be noted that the greatest bending stress is at the root of

the flank or base of the dedendum.Then Equation (1.4) becomes Equation (1.5)

Ft sFlim (1.5)Equation (1.6) presents the calculation of Ftlim:

Ftlim = sFlim () (kgf) (1.6)

Equation (1.6) can be converted into stress by Equation (1.7):

sF = Ft () SF (kgf/mm2) (1.7)

mnb KLKFX 1YFYeYb KVKO SF

YFYeYb KVKOmn b KLKFX

QTC Stock Gear Selection Methods


15/525XV

Example 6: Availability of Secondary Operations

Example 5: Cost performance

Selecting Gears Based on Use

There are many ways to select gears depending on which parameters are more

important than others such as the strength, size, precision, and speed ratio. As

a guide, we have introduced "Selecting Gears Based on Strength" and "Selecting

Gears Based on Use".

Example 1: High Speed Rotation

Example 2: High Strength (compact design)

Example 3: Backlash Considerations

Example 4: Calculating and Positioning

Example 7: High Reduction Ratios

Example 8: Rust Prevention

For applications requiring noise and vibration reductions in high speed geardrives, we recommend the ground gears (items with letter G in catalognumbers). Using helical gears will increase the contact ratio, leading to smoothertransmission. Example

MSGA Ground Spur GearsJIS N5 Class (OLD JIS1)Overall carburizing

SSG Ground Spur GearsJIS N7 Class (OLD JIS3)

Tooth surface inductionhardened

The more production steps, the higher the cost. For example, the SS series whichgoes thru steps of - raw material, turning, gear cutting, and black oxide - hasexcellent cost-performance ratio. The Injection Molded Gears and Sintered Gears arealso products with high cost-performance figures due to mass production.

Example

SS Steel Spur Gears DS Injection Molded Spur Gears LS Sintered Metal Spur Gears

Generally, the size of gears is proportional to load capacity. To make the designcompact requires the use of alloys (SCM415, SCM440) with heat treating. Werecommend catalog parts that start with letter M or K.

Example

MSGA Ground Spur GearsSCM415 overall carburizing

KHG Ground Helical GearsTooth surface inductionhardened

In order to minimize the backlash, use high precision parts with ability to adjust centerdistances. KHK carries, as standard products, items with ability to adjust backlash suchas Tapered Racks and Pinions and Duplex Worms and Worm Wheels.

Example

Tapered Racks & PinionsKTSCP, STRCPF

Duplex Worms, Worm WheelsKWGDL(S), AGDL

It is very convenient to use CP Racks and Pinions for positioning applications. Werecommend using ground gears for use in calculating to reduce pitch errors.

Please note that heat treated items have hard surfaces. While they gain the strength,they lose the ability of secondary operations to be performed.

Example MSGA Ground Spur Gears

Overall carburizing (Secondary operations

not possible)

SSG Ground Spur GearsTooth surface Induction hardened

(Secondary operations possible except the

tooth) SS Steel Spur Gears

No heat treatment (Secondary operations

possible)

We recommend the use of Worm Gear Pair or High Ratio Hypoid Gears.It is also possible to obtain high reduction ratios by forming planetary gearsystems using spur and internal gears.

Example Worm Gear Reduction Ratios

1/101/151/201/301/40

1/501/601/801/1001/120

High Ratio Hypoid Gear Reduction Ratios

1/151/201/301/451/60

1/901/1201/1801/200

Stainless steel and plastic material are suitable where rust will cause problems suchas in food and chemical processing equipment. KHK uses these materials in themanufacture of many kinds of spur, rack, miter, bevel, screw and worm gears.

QTC Stock Gear Selection

Example

SSCPG CP Ground Spur PinionsSSCPG10-20JIS N7 Class (JIS B1702-1;1998)

KRGCP CP Ground RacksKRGCP10-500KHK R 001 Grade 1


16/525

NOTES

XV I


17/525

(Example)

Spur Gears

The Catalog Number for KHK stock gears is based on thesimple formula listed below.Please order KHK gears by specifying the Catalog Numbers.

Special Characteristics, Points of Caution

in Selecting and Using Spur Gears ........................ page 26

MSGA (B) Ground Spur Gears............................... page 34

SSG Ground Spur Gears........................................ page 46

SSGS Ground Spur Pinion Shafts..........................

page 58SS Steel Spur Gears .............................................. page 60

SSA Steel Hubless Spur Gears.............................. page 76

SSY Steel Thin Face Spur Gears ........................... page 82

SSAY Steel Hubless Thin Face Spur Gears ........... page 86

SSAY/K Spur Gears with Built-In Clamps............... page 88

LS Sintered Metal Spur Gears................................ page 92

SUS.SUSA Stainless Steel Spur Gears ................. page 94

SUSL Stainless Steel Fairloc Hub Spur Gears....... page 100

DSL Acetal Fairloc Hub Spur Gears ....................... page 104

NSU Plastic Spur Gears with Steel Core................ page 108

PU Plastic Spur Gears with Stainless Steel Core... page 114PS.PSA Plastic Spur Gears ................................... page 116

DS Injection Molded Spur Gears ............................ page 122

BB Sintered Metal Bushings................................... page 124

BSS Brass Spur Gears........................................... page 126

SSR Steel Ring Gears (Spur Gears) ...................... page 127

Table of Contents

Catalog Number of KHK Stock Gears

Spur Gears

M SGA 1 - 18

No. of Teeth(18)

Module(1)

Type (Ground Spur Gear)

Material (SCM415)

MaterialS S45CM SCM415SU SUS303P MC901N MC601-STD DURACONBS Free-Cutting Brass C3604BDL SMF5040

TypeS Spur GearsSA Hubless Spur GearsSY Thin Face Spur GearsSAY Hubless Thin Face Spur GearsSGA(B) Ground Spur GearsSG Ground Spur GearsSL Fairloc Hub GearsSR Ring GearsU Plastic Spur Gears with Steel Core

25

1


18/525

Main Features of Types of Spur Gears Offered

26

With 0ur Large Selection, You Can Find Suitable Gears for Almost Any Application !

Characteristics

To meet your requirements, KHK stock gears are made in a variety of types, materials, configurations, modules and numbers of teeth. We also

offer products that allow secondary operations to be performed on the bores, shafts, outside diameters, keyways and set screws.

The following table lists the main features

Catalog No.

MSGA(B)

SSG

SSGS

SS

SSA

SSY

SSAY

LS

SUS.SUSA

SUSL

DSL

NSU

PU

PS.PSA

DS

BSS

SSR

1~4

1~4

1.5~3

1~10

1~5

0.8~1.25

1~1.25

0.5~0.8

1~4

0.5~1

0.5~1

1~3

1~3

1~3

0.5~1

0.5~0.8

2~3

N5

N7

N7

N8

N8

N8

N8

(N8)

N8

(N8)

(N10)

N9

N9

N9

(N12)

N8

N9

High strength, abrasion-resistant and compact.

Allows users to perform secondary operations.

Ground shaft pinions that allow modification of shafts to fit your bearings.

Low cost with large selections of modules and numbers of teeth.

Hubless gears for lighter and more compact applications.

Narrower face gears for light-duty applications.

Hubless and narrow faces for even lighter and more compact gears.

Low cost due to elimination of machining and reduction in wasted material.

Stainless steel gears for more rust-resistant gears.

Smaller module gears which clamp to the shafts without any keys or set screws.

These rust-resistant gears can be clamped to the shafts without any keys or set screws.

Nylon teeth with steel hubs that can have keyways and set screws added.

Nylon teeth with stainless steel hubs for rust-resistance.

Possible to operate without lubrication. Suitable for food processing machines.

Low cost, mass-produced products suitable for light duty office machines.

Small module brass spur gears suitable for mating with DS gears.

Allows large gear ratios. Can also be used as segment gears and corner racks.

Carburized

Gear teethinductionhardenedGear teethinductionhardened

Module MaterialHeat

Treatment

Tooth

Surface

Finish

PrecisionJIS B1702-1

( ) denotes

JIS B1702-2

Secondary

OperationsMain Characteristics

Possible Partly possible X Not possible

By chamfering the corners of the top land, gear noise is reduced, and the chances of damage due to handling and transportation are decreased. All KHK gears largerthan m1.5 have their teeth chamfered.

Black oxide coating is a film of triferotetraoxide (F e3O4), a kind of rust, which is applied to the gear surface to help resist rusting.

KHK Stock Spur Gears

Ground

Ground

Ground

Cut

Cut

Cut

Cut

Sintered

Cut

Cut

Cut

Cut

Cut

Cut

InjectionMolded

Cut

Cut

SCM415

S45C

S45C

S45C

S45C

S45C

S45C

SMF5040(Equiv. to S45C)

SUS303

SUS303

Acetal(SUS303)

MC601ST(S45C)

MC901(SUS303)

MC901

M90-44

C3604BD-F

S45C


19/52527

Selection Hints

Please select the most suitable products by carefully considering the characteristics of items and contents of the product tables.

It is also important to read all applicable CAUTION notes before the final selection.

Use of catalog numbers when ordering will simplify and expedite the processing of your order.

1.Caution in selecting the mating Gears

Basically, all spur gears, internal gears and racks can be paired as

long as the module matches. The product with different materials,

tooth widths, or methods of cutting the teeth can be mated.

When using a pinion with an internal gear with a small difference

in the numbers of teeth, there are possibilities for involute

interference, trochoid interference and trimming interference. See

the internal gear interference portion of the technical section to

avoid problems in assembling these items.

2. Caution in Selecting Gears Based on Gear Strength

The gear strength values shown in the product pages were computed

by assuming a certain application environment. Therefore, they should

be used as reference only. We recommend that each user computes his

own values by applying the actual usage conditions.

NSU spur gears with steel core and PU plastic gears with stainless

steel core require additional considerations of holding strength

between plastic and metal. Also, SUSL Fairloc hub spur gears, DSL

Fairloc hub spur gears and SSAY/K spur gears with built-in clamps

need additional considerations of the starting torque. The table below

contains the assumptions established for various products in order to

compute gear strengths.

Item

Catalog No.

MSGA(B)SSG(SSGS)

SS, SSASSY, SSAYSSAY/KSSR

SUSSUSASUSLLS

BSS NSUPUPS

DSL

DS

Formula NOTE 1

No. of teeth of mating gears

Rotation

Durability

Impact from motor

Impact from load

Direction of load

Allowable bending stresss at rootFlim NOTE 2

Safety factor SF

Formula of spur and helical gears on bending strength (JGMA401-01)

Same number of teeth (30 for SSR)

Over 107 cycles

Uniform load

Uniform load

Bidirectional

1.2

600min-1 100min-1 100min-1

-

The Lewis formula

1.59kgf/mm2(40C with no

lubricant)

1.59kgf/mm2(40C with no

lubricant)

NOTE 3

m0.5 4.5m0.8 4.0m1.0 3.5kgf/mm2

Allowable bending stress

31.33kgf/mm2 14(16.67)kgf/mm2 12.67kgf/mm2 7kgf/mm2 2.67kgf/mm2

FormulaNOTE 1

Kinematic viscosity of lubricant

Gear support

Allowable Hertz stress Hlim

Safety factor SH

Formula of spur and helical gears on surface durability (JGMA402-01)

100cSt(50C)

Symmetric support by bearings

1.15

166kgf/mm2 90(99)kgf/mm2 49kgf/mm2 41.3kgf/mm2 -

NOTE 1:JGMA (Japanese ManufacturersAssociation), MC Nylon TechnicalData of Nippon Polypenco Limitedand Duracon Gear of Polyplastic Co.The units for rotational speed(rpm) and the load (kgf/mm2) werematched to the units needed in theequation.

NOTE 2:Since the load is bidirectional,the allowable bending stress atroot Flim, calculated from JGMA401-01, is set to 2/3 of the value.

NOTE 3:The values for DS m 0.5 gears wereassumed by KHK.

Calculation of Bending Strength of Gears

Calculation of Surface Durability (Except where it is common with Bending Strength)

Definition of bending strength

The a l lowable bending

strength of a gear is defined

as the allowable tangential

force at the pi tch ci rcle

based on the mutua l l y

allowable root stress of two

meshing gears under load.

Definition of surface durability

The surface durability of

a gear is defined as the

allowable tangential force

at the pitch circle, which

permits the force to be

transmitted safely without

incurring surface failure.

Example of the failure due to

insufficient bending strength.

Example of the defacement

due to insufficient surface

durability.

KHKTechnicalInformation


20/52528

3.Caution with Regard to the Special Characteristics of Various Products

MSGA (B) series of ground gears are carburized and thereforeno secondary operations can be performed. Also, even though

the keyways are made according to JIS B1301 standard,

Js 9 tolerance, the heat treating process may produce some

deformations.

SSGS ground pinion shafts with 10 and 11 teeth are profile

shifted gears (x=+0.5) and therefore cannot be assembled to the

center distance of gears that are not profile shifted gears (x=0).

The black oxide finish is somewhat effective in preventing rust

but is not rustproof.

SUS stainless steel gears have high degrees of antirust property,but are not totally rustproof.

When selecting SUSL Fairloc hub spur gears, it is possible insome cases for the gears to slip on the shaft before the gear teeth

fail due to loads.

When selecting NSU plastic spur gears with steel core, it is

possible in some cases for the holding strength between the

metal core and the molded plastic to be less than the gear

strength. As for details of the holding strength please refer to

pages 108~109.

Due to their material, the quality of PS plastic spur gears may be

affected by significant variations in temperature or humidity. As

for details please refer to pages 32~33.

Due to a large coefficient of heat expansion of nylon, if these

gears are to be used without lubrication, we recommend that themating gears be metal gears, which can transmit heat, preventing

temperature build-up.

SSR ring gears are easily deformable and may develop changes

in dimensions.

SSAY, SSY spur gears and DS injection molded spur gears have

narrow face widths. However, it is possible to mesh them with

other gears (SS, SSA...) with wide face widths.

4. Other Points to Consider in Selection Process

There are various footnotes to the product pages under theheadings of CAUTION. Please consider them carefully when

selecting these products.

There may be slight differences in color or shape of products

shown in the photograph from the actual products.

KHK reserves the right to make changes in specifications and

dimensions without notice.

KHK is ready to produce and supply custom order products.

When you require specific gears different from KHK Stock

Gears please contact our distributor for quotation. Also, please

refer to page 16 KHK Custom Order Products.

Spur Gears


21/52529

In order to use KHK stock gears safely, carefully read the

Application Hints before proceeding. If there are questions or if

you require clarifications, please contact our technical department

or your nearest distributor.

1. Caution on Performing Secondary Operations

MostKHKgearscanbemodifiedbytheuser.Please

notethefollowingpoints.If you are reboring, it is important to pay special attention to

locating the center in order to avoid runout.

The reference datum for gear cutting is the bore. Therefore, use

the bore for locating the center. If it is too difficult to do for

small bores, the alternative is to use one spot on the bore and the

runout of the side surface.

If the rework requires using scroll chucks, we recommend the

use of new or rebored jaws for improved precision. If chucking

by the teeth, please apply the pressure carefully to avoid

crushing the teeth which will lead to noisy gears.

KHK CO., LTD. TECHNICAL DEPARTMENT

PHONE: 81-48-254-1744 FAX: 81-48-254-1765

E-mail [email protected]

Nylon is susceptible to change due to temperature and humidity.Dimensions may change during remachining operations and

afterwards.

In order to avoid stress concentration, leave radii on the keywaycorners.

Lathe Operations

The maximum bore size is dictated by the requirement that the

strength of the hub is to be higher than that of the gear teeth.

MSGA (B) ground spur gears (material SCM415) are wholly

carburized so that no secondary operations can be performed.

SSG ground spur gear teeth are induction hardened past the tooth root

(approximately 1mm deep). Therefore, care must be exercised when

performing secondary operations on the bores or adding keyways.

To avoid problems of reduced gear precision and other

manufacturing difficulties, do not attempt to machine the gears

to reduce face widths.

The bore tolerance of DS injection molded spur gears is

generally -0.10 to -0.05, but may be +values at the central

portion of the hole. Remachining the bore is not recommended

since reworking may expose voids in the plastic.

SUSL Fairloc gears cannot be rebored. They may be pinned

provided caution is exercised not to deform the slots in the hubs.

When heat-treating S45C products, it is possible to get thermalstress cracks. It is best to subject them to penetrant inspection

afterwards. If tooth strength is not sufficient, it can be increased

approximately four times by heat-treating. On the other hand,

the precision of the gear will drop about one grade.

Tapping & Keyway Slotting

Heat Treatment

1) Induction heat treatment of S45C products shouldconform with the reference data below; Heat treatment temperature - 800~900C Tempering temperature - 200~250C

Hardness - 48~53HRC

2) In general, gears made from S45C have not been heat-treated. The user can heat-treat as required, but somedeformation will be introduced. Ordinarily, a grindingprocess is needed after heat-treatment. Otherwise, theprecision grade will drop about one grade.

3) SUS303 and 304 belong to austenite family and cannotbe hardened. To harden stainless, there are martensiticseries, such as SUS420J2.

4) The induction hardened depth is approximately 1mm.However, the hardening process does not completelyreach the root of the gear tooth at the center portion ofthe face width.


Application Hints

11

12


22/52530

2. Points of Caution in Assembling

KHK stock spur gears are designed to give the proper backlash

when assembled using the center distance given by the formula

below. The amount of backlash is given in the product table foreach gear. For SSGS ground gears with 10 or 11 teeth, however,

the profile is shifted (x = +0.5) so that the center distances are

given in tables below the product table.

Verify that the two shafts are parallel. Incorrect assembly will

lead to uneven teeth contact which will cause noise and wear.

(After assembly, the gear mesh can be checked by applying acontact pattern compound and rotating the gears.)

3. Notes on Starting Operations

a=m(Z1+Z2)/2

where

a =center distance

m =module

Z1=no. of teeth of pinion

Z2=no. of teeth of gear

A gear may slip on the shaft or move axially while in motion if

it is not firmly fastened to the shaft. Step shafts, collars and set

screws are some of the ways to secure the gears.

Keyways are generally used as the method of engaging thegears with the axis. There is also a method of the setting with

a MACHALOCK, Posi-Lock, and Shupanring, etc. which areparts for engaging the hole and the axis.

Assembly should be performed cautiously to avoid damage to

the gears or injuries to the worker.

This picture is an example of poor tooth contact of an SSG3-30

gear which had only 30% of the gear tooth in proper contact. In this

example the gear oil used is equivalent to JIS gear oil category 2,

No.3, and the design conditions were 417N.m load torque at 278

min-1 (12 kW) which was 1.5 times the allowable bending strength

and 3 times the allowable surface durability torque. The pitting

occurred on the poor tooth contact area after 60 hours of continuous

operation.

Before operating, check the following:

Are the gears firmly mounted on the shafts?

Have you eliminated uneven tooth contact?

Does the gear mesh have a proper amount of backlash?

(Please avoid the condition of no backlash.)

Is there sufficient lubrication?

If the gears are exposed, install a safety cover for protection.

Never touch gears while they are in motion.

Spur Gears

Poor tooth contact and pitting

Center Distance Tolerance

Old standard JGMA113-01, Center Distance Tolerance,

specified plus side tolerance of H7 - H8. In the new standard,

JGMA1101-01:2000, it was decided that it is more desirable to

specify +/- tolerance especially in gear train applications.

Method for Adjusting Backlash

Backlash may be adjusted by changing the center distance of

mating gears. For more information, please consult the technical

section on gear backlash.

Overall Length Tolerance for Spur and Helical Gears

0.10

0.10

0.10

0.20

0.10

0.15

Tolerance

100

030

Under

Overall Length (mm)

Over

030

100

Following products are excluded from this table:

DS Injection Molded Spur Gears, LS Sintered

Metal Spur Gears, DSL Fairloc Hub Spur Gears,

SUSL Fairloc Hub Spur Gears


23/52531

If there is unusual noise or vibration at the start up orinsufficient lubrication after the start up, please recheck the

gears and correctness of the assembly. Some of the methods for

achieving noise reduction are:

(a) High Precision

(b) Fine Tooth Surface Finish

(c) Accurate Tooth Contact

The followings are the gear lubrication methods in general use:

(a) Grease Lubrication

(b) Splash Lubrication (Oil Bath Method)

(c) Forced Oil Circulation Lubrication

Check lubrication after start up. Sometimes, when the unit isinitially being operated, lubricating oil deteriorates rapidly.

4. Other Points to Consider in Applications

KHK products are individually packaged to avoid damage.Depending on how they are handled, it is still possible to deform

or break them. It is important to exercise care in handling these

parts.

Check the products as they are being taken out of the boxes. Ifany of them are rusted, scratched or dented, please return to the

dealer where they were bought, for exchange.

KHK cannot guarantee the precision of gears once the customer

performs a secondary operation on them.

Examples of KHK Gear Applications

Automatic packing machine (Spur Gears)

Food handling machine

(Plastic Spur gear)

Electric Component Assembly Line

(SS Spur Gears)



24/525

MC901

MC601ST

66Nylon

Polyacetal

Teflon

50 100 150 200

56

120

110

158

66

182

Above 200

Above 215

160200

200215

4.6kgf/cm2

18.6kgf/cm2

D-696

P r o p e r t i e s

Heat conductivity

Coefficient of linearthermal expansion

TestmethodASTM

32

Thermal Properties

Melting point

Chemical Resistance Properties

Water Saturation Value (in water)

The quality of plastic gears (MC) may change due to variations of ambient temperature and humidity. The following useful data is provided to help the user with

correct selection.

Dimensions of MC nylon gears change with temperature. KHK MC nylon

gears are cut in the ambient temperature of 20to 30C(68~86F).Some

dimensional changes could be expected in summer and winter.

We present the thermal deflection property of several plastics under load.

Thermal deflection temperature under load of certain plastic

materials (ASTM-D648)

Thermal Properties of Plastic Materials

Water Absorption Properties

Dimensions of MC nylon gears change with moisture content. This may

cause the sizes to vary from the time of purchase to the time of usage. The

following table and the chart show the moisture content and its effect on

the dimensions of MC901 nylon.

Moisture Absorption Rate of MC901 (ASTM D-570, etc.)

MC nylon products are mainly used in food and chemical machinery.However, there are limitations depending on the environment. Generally,MC nylon is resistant against organic agents but weak against acids. We listthe chemical resistance properties of MC nylon against various substances.Since the reaction may vary depending on the applications, it is importantto test it before processing. The MC Nylon that is approved for food contactby the US FDA is MC907. Gears can be custom made from this material.

Chemical Resistance Properties of MC Nylon( Hardly affected Possible to use under certain conditions Not suitable for use)

Moisture Absorption Rate (24 hrs., in water at room temperature)

Water Saturation Value (room temperature in air)

0.5~1.0%

5.5~7.0%

2.5~3.5%

C-177

Unit

MC

901,900NC

2

601ST

66Nylon

2.11

Polyacetal Teflon

2.16

10-5/ 9 6.510

15

9 10

Specific heat cal/.g

0.4 0.4 0.25

Temperature of thermaldeflection under certain load

(18.6kgf/cm2)D-648

160

200

Above200

66 110 56

(4.6kgf/cm

2

) D-648

200

215

Above

215182 158 120

Continuous workingtemperature

120 150 120 95 260

D-621 % 0.65

220

223

220

223

165

Moisture content (%)

Moisture Content vs. Dimensional Variation of MC901

Dimensionalvariation(%)

0

0

0.5

1.0

1.5

2.0

1 2 3 4 5 6 7

For plastic materials, it is difficult to determine the operating temperature

below which there is no harmful effect from long term, continuous operation.

In general, it is set by actual usage experience, though it is said to be 20 to

30 below the thermal deflection temperature.

There is not much data on low temperature limits. Users should rely on their

own experience taking the brittleness properties into consideration.

If you were to use NSU, PU or PS Plastic gears without lubricants, the

meshing two nylon gears generates heat and they expand. We recommendmetal gears for mating gears.

Characteristics of Plastic Gears

Spur Gears

Deflection rate undercertain load

(140kgf/cm2,50 )

Diluted hydrochloric acid

Concentrated hydrochloric acid

Diluted sulfuric acid

Concentrated sulfuric acid

Diluted nitric acid

Concentrated nitric acid

Diluted phosphoric acid

Sodium hydroxide(50%)

Ammonia water(10%)

Ammonia gas

Saline solution(10%)

Potassium chloride

Calcium chloride

Ammonium chloride

Sodium hypochlorite

Sodium sulfate

Sodium thiosulfate

Sodium bisulfate

Cupric sulfate

Potassium dichromate (5%)

Potassium permanganate

Sodium carbonate

Methyl acetate

Ethyl acetate

Sodium acetate

Aceton

Methyl acetate

Formaldehyde

Acetaldehyde

Ether family

Acetamide

Ethylenediamine

Acrylnitrile

Carbon tetrachloride

Ethylene chloride

Ethylene chlorohydrin

Trichlorethylene(Tri-clene)

Benzene

Toluene

Phenol

Aniline

Benzaldehyde

Benzonic acid

Chlorobenzene

Nitrobenzene

Salicylic acid

Diduthylphthalate

Synchrohexane

Synchrohexanol

Tetrahydrofuran

(Epsilon)-caprolactam

Petroleum ether

Gasoline

Diesel oil

Lubricant oil

Mineral oil

Castor oil

Linseed oil

Silicon oil

Edible fat

Tallow

Butter

Milk

Grape wine

Fruit juice

Carbonate drink

10-1kcal/

mhr.

~

~

~ ~

~


25/525

Round bar-MC cast nylon with metal core

33

D

180

If you require other sized gears than those listed in our NSU or

PU series, we can design and quote custom gears made from the

following round bars. Since we stock them, we can deliver fast

and reduce your cost.

Dimensions of MC nylon round bars (Unit: mm)

Outside dia.

040

050

055

065

080

090

100

110

120

130

150

Metal core dia.

d

020

025

030

040

045

050

055

060

070

080

090

110

Total lengthMC thickness

10.0

12.5

12.5

12.5

17.5

20.0

22.5

25.0

25.0

25.0

30.0

35.0

Weight(kgf/pcs.)

00.4

00.7

00.9

01.4

01.9

02.3

02.8

03.4

04.4

05.5

07.0

10.4

L

105

105

105

105

105

105

105

105

105

105

105

105

200 120 40.0 12.5105

*Dimensions are based on technical date of NIPPON POLYPENCO

LIMITED.

How is MC nylon fused to the metal core

This method is superior to other conventional methods such as

bolting, shrink fitting and bonding.

1. Outline of the procedure

2. Advantage of MC nylon with metal core

The surface of the core material is

rolled with a 2mm pitch diamond

knurl. Then one or more grooves

(1~2mm wide and 1mm deep) are

cut as shown on the right.

The metal surface is treated prior to

casting nylon in a mold.

(1) Wide temperature range

There are examples of wheel use in furnaces at 130 to 140C

(2) Good dimensional stability

Since nylon is fused to the whole outer surface of the metal hub, dimensionalchange is very small even under temperature variations.

(3) Metal-hub rim may be thin

Even if there is not sufficient material to pass a bolt into the rim, the hub can

be fixed by means of a bonding method.

(4) Good appearance

Elimination of bolts and nuts provides a cleaner physical appearance .

(5) Cost savings

In general, it is more economical than attaching with bolts, especially in large

quantities.

2mm Pitch

diamond knur

MC901

&

F

SUS303 (MC9-SUSrod)S25C (MC9-SCrod)FC250 (MC9-FCrod)

.


Data related to the properties of MC nylon are extracted from the MC

nylon technical data issued by NIPPON POLYPENCO LIMITED.

2mm Pitch

diamond knurl


26/525

Module 1

34

CAUTION:No secondary operation can be performed due to the carburizing process.

NOTE 1:Although the dimensions of the keyway are made to the JIS(Js9) tolerance, there may be some deviations due to the effects of the heat treatment.

S1 Shape

MSGA(B) Ground Spur Gears 1Module

Gears

Catalog No. Module No. of teeth ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length Web thickness Web O.D.

AH7 B C D E F G H I

MSGA1-18

m1

18 S1 8 15 18 20 10 5 15

MSGA1-20

MSGB1-2020 S1

8

1017 20 22 10 5 15

MSGA1-24

MSGB1-2424 S1

10

1220 24 26 10 5 15

MSGA1-25

MSGB1-2525 S1

10

1220 25 27 10 5 15

MSGA1-30

MSGB1-3030 S1

10

1225 30 32 10 5 15

MSGA1-35

MSGB1-3535 S1

10

1525 35 37 10 5 15

MSGA1-36

MSGB1-3636 S1

12

1525 36 38 10 5 15

MSGA1-40

MSGB1-40

40 S112

15

30 40 42 10 5 15

MSGA1-45

MSGB1-4545 S1

12

1530 45 47 10 5 15

MSGA1-48

MSGB1-4848 S1

12

1530 48 50 10 5 15

MSGA1-50

MSGB1-5050 S1

12

1535 50 52 10 5 15

MSGA1-55

MSGB1-5555 S1

15

2040 55 57 10 10 20

MSGA1-60

MSGB1-6060 S1

15

2040 60 62 10 10 20

MSGA1-70

MSGB1-7070 S1

20

2545 70 72 10 10 20

MSGA1-80

MSGB1-80 80 S1

20

25 45 80 82 10 10 20

MSGA1-100

MSGB1-100100 S1

20

2545 100 102 10 10 20


27/52535

NOTE 2:The allowable torques shown in the table are calculated values according to the assumed usage conditions.

Please see page 27 for more details.

NOTE 3:The backlash values shown in the table are the theoretical values of a pair of identical gears in mesh.

Ground Spur Gears

Keyway NOTE 1 Allowable torqueNm) Allowable torquekgfm Backlash

mmNOTE 3

Weight

kgCatalog No.

Width Depth Bending strength Surface durability Bending strength Surface durability

3 x 1.4 12.1 6.37 1.24 0.65 0.08~0.16 0.020 MSGA1-18

3 x 1.4

4 x 1.814.2 8.04 1.45 0.82 0.08~0.16

0.027

0.023

MSGA1-20

MSGB1-20

4 x 1.8

4 x 1.818.5 12.0 1.88 1.22 0.08~0.16

0.038

0.034

MSGA1-24

MSGB1-24

4 x 1.8

4 x 1.819.6 13.1 2.00 1.33 0.08~0.16

0.041

0.037

MSGA1-25

MSGB1-25

4 x 1.8

4 x 1.825.1 19.0 2.56 1.94 0.08~0.16

0.065

0.061

MSGA1-30

MSGB1-30

4 x 1.8

5 x 2.330.7 26.2 3.13 2.67 0.08~0.16

0.085

0.073

MSGA1-35

MSGB1-35

4 x 1.8

5 x 2.331.9 27.8 3.25 2.84 0.08~0.16

0.085

0.077

MSGA1-36

MSGB1-36

4 x 1.8

5 x 2.3

36.5 34.6 3.72 3.53 0.08~0.160.11

0.10

MSGA1-40

MSGB1-404 x 1.8

5 x 2.342.3 44.3 4.31 4.51 0.08~0.16

0.14

0.13

MSGA1-45

MSGB1-45

4 x 1.8

5 x 2.345.8 50.6 4.67 5.16 0.08~0.16

0.16

0.15

MSGA1-48

MSGB1-48

4 x 1.8

5 x 2.348.1 55.1 4.91 5.62 0.08~0.16

0.18

0.17

MSGA1-50

MSGB1-50

5 x 2.3

6 x 2.854.0 67.3 5.51 6.86 0.10~0.18

0.26

0.23

MSGA1-55

MSGB1-55

5 x 2.3

6 x 2.859.9 80.6 6.11 8.22 0.10~0.18

0.29

0.27

MSGA1-60

MSGB1-60

6 x 2.8

8 x 3.371.9 111 7.33 11.4 0.10~0.18

0.37

0.35

MSGA1-70

MSGB1-70

6 x 2.8

8 x 3.3 83.9 147 8.55 15.0 0.10~0.18

0.47

0.44

MSGA1-80

MSGB1-80

6 x 2.8

8 x 3.3103 224 10.5 22.8 0.10~0.18

0.69

0.66

MSGA1-100

MSGB1-100

Specifications

Precision grade

Gear teeth

Pressure angle

Material

Heat treatment

Standard full depth

20

SCM415

Overall carburizing

Tooth hardness

Surface treatment

Tooht surface finish

Secondary Operations

55~60HRC

-

Ground

Bore

JIS N5 grade (JIS B1702-1: 1998)OLD JIS 1 grade (JIS B1702: 1976)

Datum reference surfacefor gear grinding

Not possible (We can supplydifferent configuration as custom madegears)


28/52536

Module 1.5


NOTE 1:Although the dimensions of the keyway are made to the JIS (Js9) tolerance, there may be some deviations due to the effects of the heat treatment.

S1 Shape


AH7 B C D E F G H I

MSGA1.5-15

m1.5

15 S1 10 18 22.5 22.5 15 10 25

MSGA1.5-18

MSGB1.5-1818 S1

10

1222 27 30 15 10 25

MSGA1.5-20

MSGB1.5-2020 S1

12

1525 30 33 15 10 25

MSGA1.5-24

MSGB1.5-2424 S1

12

1528 36 39 15 10 25

MSGA1.5-25

MSGB1.5-2525 S1

14

1630 37.5 40.5 15 10 25

MSGA1.5-30

MSGB1.5-3030 S1

15

1830 45 48 15 10 25

MSGA1.5-35

MSGB1.5-3535 S1

15

1832 52.5 55.5 15 10 25

MSGA1.5-36

MSGB1.5-36

36 S115

18

32 54 57 15 10 25

MSGA1.5-40

MSGB1.5-4040 S1

16

2035 60 63 15 10 25

MSGA1.5-45

MSGB1.5-4545 S1

16

2040 67.5 70.5 15 10 25

MSGA1.5-48

MSGB1.5-4848 S1

16

2040 72 75 15 10 25

MSGA1.5-50

MSGB1.5-5050 S1

18

2240 75 78 15 10 25

MSGA1.5-55

MSGB1.5-5555 S1

20

2545 82.5 85.5 15 10 25

MSGA1.5-60

MSGB1.5-6060 S1

20

2545 90 93 15 10 25

MSGA1.5-70

MSGB1.5-70 70 S1

20

25 45 105 108 15 10 25

MSGA1.5-80

MSGB1.5-8080 S1

20

2545 120 123 15 10 25

MSGA1.5-100

MSGB1.5-100100 S1

25

3050 150 153 15 10 25

MSGA(B) Ground Spur Gears 1.5Module

Gears


29/52537




Keyway NOTE 1 Allowable torqueNm)NOTE 2 Allowable torquekgfm Backlash

mmNOTE 3

Weight

kgCatalog No.


4 x 1.8 30.8 14.8 3.15 1.51 0.08~0.16 0.050 MSGA1.5-15

4 x 1.8

4 x 1.841.0 22.1 4.18 2.26 0.08~0.16

0.080

0.074

MSGA1.5-18

MSGB1.5-18

4 x 1.8

5 x 2.348.0 27.9 4.89 2.84 0.08~0.16

0.098

0.085

MSGA1.5-20

MSGB1.5-20

4 x 1.8

5 x 2.362.4 41.5 6.36 4.24 0.08~0.16

0.14

0.13

MSGA1.5-24

MSGB1.5-24

5 x 2.3

5 x 2.366.0 45.4 6.73 4.63 0.08~0.16

0.15

0.14

MSGA1.5-25

MSGB1.5-25

5 x 2.3

6 x 2.884.7 66.4 8.63 6.77 0.08~0.16

0.21

0.19

MSGA1.5-30

MSGB1.5-30

5 x 2.3

6 x 2.8104 91.5 10.6 9.34 0.10~0.18

0.28

0.26

MSGA1.5-35

MSGB1.5-35

5 x 2.3

6 x 2.8

108 97.1 11.0 9.90 0.10~0.180.30

0.28

MSGA1.5-36

MSGB1.5-365 x 2.3

6 x 2.8123 121 12.6 12.3 0.10~0.18

0.37

0.34

MSGA1.5-40

MSGB1.5-40

5 x 2.3

6 x 2.8143 155 14.5 15.8 0.10~0.18

0.48

0.46

MSGA1.5-45

MSGB1.5-45

5 x 2.3

6 x 2.8155 177 15.8 18.1 0.10~0.18

0.54

0.51

MSGA1.5-48

MSGB1.5-48

6 x 2.8

6 x 2.8162 193 16.6 19.7 0.10~0.18

0.57

0.54

MSGA1.5-50

MSGB1.5-50

6 x 2.8

8 x 3.3182 236 18.6 24.0 0.10~0.18

0.69

0.65

MSGA1.5-55

MSGB1.5-55

6 x 2.8

8 x 3.3202 283 20.6 28.8 0.10~0.18

0.81

0.77

MSGA1.5-60

MSGB1.5-60

6 x 2.8

8 x 3.3 231 372 23.6 38.0 0.12~0.20

1.08

1.04

MSGA1.5-70

MSGB1.5-70

6 x 2.8

8 x 3.3270 494 27.5 50.3 0.12~0.20

1.39

1.36

MSGA1.5-80

MSGB1.5-80

8 x 3.3

8 x 3.3347 787 35.4 80.2 0.12~0.20

2.13

2.09

MSGA1.5-100

MSGB1.5-100

Ground Spur Gears

Specifications

Precision grade

Gear teeth

Pressure angle

Material

Heat treatment

Standard full depth

20

SCM415

Overall carburizing

Tooth hardness

Surface treatment

Tooth surface finish


55~60HRC

-

Ground

Bore





30/525

S1 Shape

Module 2

38




AH7 B C D E F G H I

MSGA2-15

MSGB2-15

m2

15 S112

1524 30 34 20 10 30

MSGA2-18

MSGB2-1818 S1

12

1530 36 40 20 10 30

MSGA2-20

MSGB2-2020 S1

15

1832 40 44 20 10 30

MSGA2-24

MSGB2-2424 S1

15

1835 48 52 20 10 30

MSGA2-25

MSGB2-2525 S1

16

2035 50 54 20 10 30

MSGA2-30

MSGB2-3030 S1

18

2240 60 64 20 10 30

MSGA2-35

MSGB2-3535 S1

18

2240 70 74 20 10 30

MSGA2-36

MSGB2-3636 S1

18

2240 72 76 20 10 30

MSGA2-40

MSGB2-4040 S1

20

2545 80 84 20 10 30

MSGA2-45

MSGB2-4545 S1

20

2545 90 94 20 10 30

MSGA2-48

MSGB2-4848 S1

22

2850 96 100 20 10 30

MSGA2-50

MSGB2-5050 S1

22

2850 100 104 20 10 30

MSGA2-55

MSGB2-5555 S1

25

3055 110 114 20 10 30

MSGA2-60

MSGB2-6060 S1

25

3055 120 124 20 10 30

MSGA2-70

MSGB2-7070 S1

25

3055 140 144 20 10 30

MSGA2-80

MSGB2-8080 S2

30

3560 160 164 20 10 30

MSGA2-100

MSGB2-100100 S2

35

4080 200 204 20 10 30


Gears


31/52539




S4 Shape


mmNOTE 3

Weight

kgCatalog No.


4 x 1.8

5 x 2.373.1 35.7 7.46 3.64 0.10~0.20

0.12

0.10

MSGA2-15

MSGB2-15

4 x 1.8

5 x 2.397.2 53.5 9.91 5.46 0.10~0.20

0.19

0.17

MSGA2-18

MSGB2-18

5 x 2.3

6 x 2.8114 67.6 11.6 6.89 0.10~0.20

0.22

0.20

MSGA2-20

MSGB2-20

5 x 2.3

6 x 2.8148 101 15.1 10.3 0.10~0.20

0.32

0.30

MSGA2-24

MSGB2-24

5 x 2.3

6 x 2.8157 110 16.0 11.2 0.10~0.20

0.33

0.31

MSGA2-25

MSGB2-25

6 x 2.8

6 x 2.8201 161 20.5 16.5 0.12~0.22

0.48

0.45

MSGA2-30

MSGB2-30

6 x 2.8

6 x 2.8246 223 25.1 22.7 0.12~0.22

0.64

0.61

MSGA2-35

MSGB2-35

6 x 2.8

6 x 2.8255 236 26.0 24.1 0.12~0.22

0.67

0.64

MSGA2-36

MSGB2-36

6 x 2.8

8 x 3.3292 294 29.7 30.0 0.12~0.22

0.84

0.79

MSGA2-40

MSGB2-40

6 x 2.8

8 x 3.3338 377 34.5 38.4 0.12~0.22

1.05

1.00

MSGA2-45

MSGB2-45

6 x 2.8

8 x 3.3349 411 35.6 41.9 0.12~0.22

1.20

1.14

MSGA2-48

MSGB2-48

6 x 2.8

8 x 3.3367 448 37.4 45.7 0.12~0.22

1.29

1.24

MSGA2-50

MSGB2-50

8 x 3.3

8 x 3.3412 548 42.0 55.8 0.14~0.24

1.56

1.51

MSGA2-55

MSGB2-55

8 x 3.3

8 x 3.3457 658 46.6 67.1 0.14~0.24

1.84

1.79

MSGA2-60

MSGB2-60

8 x 3.3

8 x 3.3547 909 55.8 92.7 0.14~0.24

2.48

2.43

MSGA2-70

MSGB2-70

8 x 3.3

10 x 3.3610 1150 62.2 117 0.14~0.24

2.55

2.49

MSGA2-80

MSGB2-80

10 x 3.3

12 x 3.3785 1820 80.1 186 0.14~0.24

4.16

4.09

MSGA2-100

MSGB2-100

Ground Spur Gears

Specifications

Precision grade

Gear teeth

Pressure angle

Material

Heat treatment

Standard full depth

20

SCM415

Overall carburizing

Tooth hardness

Surface treatment



55~60HRC

-

Ground

Bore





32/525

Module 2.5

40



S1 Shape


AH7 B C D E F G H I

MSGA2.5-15

MSGB2.5-15**

m2.5

15 S115

1830 37.5 42.5 25 12 37

MSGA2.5-18

MSGB2.5-1818 S1

18

2038 45 50 25 12 37

MSGA2.5-20

MSGB2.5-2020 S1

18

2240 50 55 25 12 37

MSGA2.5-24

MSGB2.5-2424 S1

18

2240 60 65 25 12 37

MSGA2.5-25

MSGB2.5-2525 S1

20

2545 62.5 67.5 25 12 37

MSGA2.5-30

MSGB2.5-3030 S1

22

2850 75 80 25 12 37

MSGA2.5-35

MSGB2.5-3535 S1

25

3055 87.5 92.5 25 12 37

MSGA2.5-36

MSGB2.5-3636 S1

25

3055 90 95 25 12 37

MSGA2.5-40

MSGB2.5-4040 S1

25

3255 100 105 25 12 37

MSGA2.5-45

MSGB2.5-4545 S1

30

3560 112.5 117.5 25 12 37

MSGA2.5-48

MSGB2.5-4848 S1

30

3560 120 125 25 12 37

MSGA2.5-50

MSGB2.5-5050 S1

30

3560 125 130 25 12 37

MSGA2.5-55

MSGB2.5-5555 S1

30

4070 137.5 142.5 25 12 37

MSGA2.5-60

MSGB2.5-6060 S1

30

4070 150 155 25 12 37

MSGA2.5-70

MSGB2.5-7070 S2

40

5085 175 180 25 12 37 17 150

MSGA (B) Ground Spur Gears 2.5Module

Gears


33/52541

NOTE 2:The allowable torques shown in the table are calculated values according to the assumed usage conditions.Please see page 27 for more details.


S4 Shape


mmNOTE 3

Weight

kgCatalog No.


5 x 2.3

6 x 2.8143 71.0 14.6 7.24 0.10~0.20

0.23

0.20

MSGA2.5-15

MSGB2.5-15**

6 x 2.8

6 x 2.8190 107 19.4 10.9 0.10~0.20

0.34

0.32

MSGA2.5-18

MSGB2.5-18

6 x 2.8

6 x 2.8222 134 22.7 13.7 0.10~0.20

0.42

0.39

MSGA2.5-20

MSGB2.5-20

6 x 2.8

6 x 2.8289 201 29.4 20.5 0.12~0.22

0.59

0.56

MSGA2.5-24

MSGB2.5-24

6 x 2.8

8 x 3.3306 220 31.2 22.4 0.12~0.22

0.66

0.60

MSGA2.5-25

MSGB2.5-25

6 x 2.8

8 x 3.3392 322 40.0 32.8 0.12~0.22

0.94

0.87

MSGA2.5-30

MSGB2.5-30

8 x 3.3

8 x 3.3480 444 49.0 45.3 0.12~0.22

1.25

1.19

MSGA2.5-35

MSGB2.5-35

8 x 3.3

8 x 3.3498 471 50.8 48.0 0.12~0.22

1.32

1.26

MSGA2.5-36

MSGB2.5-36

8 x 3.3

10 x 3.3543 560 55.3 57.1 0.12~0.22

1.61

1.52

MSGA2.5-40

MSGB2.5-40

8 x 3.3

10 x 3.3629 718 64.1 73.2 0.14~0.24

2.00

1.93

MSGA2.5-45

MSGB2.5-45

8 x 3.3

10 x 3.3681 823 69.5 83.9 0.14~0.24

2.27

2.20

MSGA2.5-48

MSGB2.5-48

8 x 3.3

10 x 3.3716 897 73.0 91.5 0.14~0.24

2.46

2.39

MSGA2.5-50

MSGB2.5-50

8 x 3.3

12 x 3.3804 1090 82.0 112 0.14~0.24

3.06

2.90

MSGA2.5-55

MSGB2.5-55

8 x 3.3

12 x 3.3892 1310 90.9 134 0.14~0.24

3.62

3.45

MSGA2.5-60

MSGB2.5-60

12 x 3.3

14 x 3.81020 1730 104 176 0.14~0.24

4.24

4.03

MSGA2.5-70

MSGB2.5-70

Ground Spur Gears

Specifications

Precision grade

Gear teeth

Pressure angle

Material

Heat treatment

Standard full depth

20

SCM415

Overall carburizing

Tooth hardness

Surface treatment



55~60HRC

-

Ground

Bore





34/525

Module 3

42



S1 Shape


AH7 B C D E F G H I

MSGA3-15

MSGB3-15

m3

15 S118

2236 45 51 30 15 45

MSGA3-18

MSGB3-1818 S1

20

2545 54 60 30 15 45

MSGA3-20

MSGB3-2020 S1

20

2545 60 66 30 15 45

MSGA3-24

MSGB3-2424 S1

20

2545 72 78 30 15 45

MSGA3-25

MSGB3-2525 S1

25

3055 75 81 30 15 45

MSGA3-30

MSGB3-3030 S1

28

3560 90 96 30 15 45

MSGA3-35

MSGB3-3535 S1

30

3560 105 111 30 15 45

MSGA3-36

MSGB3-3636 S1

30

3560 108 114 30 15 45

MSGA3-40

MSGB3-4040 S1

30

4070 120 126 30 15 45

MSGA3-45

MSGB3-4545 S1

30

4070 135 141 30 15 45

MSGA3-48

MSGB3-4848 S1

35

4070 144 150 30 15 45

MSGA3-50

MSGB3-5050 S2

32

4070 150 156 30 15 45 20 126

MSGA3-55

MSGB3-5555 S2

35

4070 165 171 30 15 45 20 140

MSGA3-60

MSGB3-6060 S2

35

4580 180 186 30 15 45 20 156


Gears


35/52543

An example of KHKs inspection report

on tooth profile and lead errors.

The precision of a spur gear (JIS B 1702-1) is

determined by factors such as single pitch error,

pitch variation error, accumulated pitch error, tooth

profile error, run out error, lead error etc.


Please see page 27 for more details.NOTE 3:The backlash values shown in the table are the theoretical values of a pair of identical gears in mesh.

S4 Shape


mmNOTE 3

Weight

kgCatalog No.


6 x 2.8

6 x 2.8247 124 25.2 12.7 0.10~0.20

0.40

0.35

MSGA3-15

MSGB3-15

6 x 2.8

8 x 3.3328 187 33.4 19.1 0.12~0.22

0.61

0.54

MSGA3-18

MSGB3-18

6 x 2.8

8 x 3.3384 236 39.1 24.1 0.12~0.22

0.74

0.67

MSGA3-20

MSGB3-20

6 x 2.8

8 x 3.3499 353 50.9 36.0 0.12~0.22

1.03

0.96

MSGA3-24

MSGB3-24

8 x 3.3

10 x 3.3528 386 53.9 39.3 0.12~0.22

1.14

1.06

MSGA3-25

MSGB3-25

8 x 3.3

10 x 3.3677 565 69.1 57.7 0.12~0.22

1.60

1.48

MSGA3-30

MSGB3-30

8 x 3.3

10 x 3.3790 745 80.6 75.9 0.14~0.24

2.11

2.02

MSGA3-35

MSGB3-35

8 x 3.3

10 x 3.3820 790 83.6 80.6 0.14~0.24

2.23

2.14

MSGA3-36

MSGB3-36

8 x 3.3

12 x 3.3938 988 95.6 101 0.14~0.24

2.86

2.66

MSGA3-40

MSGB3-40

8 x 3.3

12 x 3.31090 1260 111 129 0.14~0.24

3.57

3.37

MSGA3-45

MSGB3-45

10 x 3.3

12 x 3.31180 1450 120 147 0.14~0.24

3.94

3.83

MSGA3-48

MSGB3-48

10 x 3.3

12 x 3.31240 1570 126 161 0.14~0.24

3.79

3.62

MSGA3-50

MSGB3-50

10 x 3.3

12 x 3.31330 1830 135 187 0.14~0.24

4.39

4.29

MSGA3-55

MSGB3-55

10 x 3.3

14 x 3.81470 2200 150 224 0.14~0.24

5.31

5.08

MSGA3-60

MSGB3-60

Ground Spur Gears

Specifications

Precision grade

Gear teeth

Pressure angle

Material

Heat treatment

Standard full depth

20

SCM415

Overall carburizing

Tooth hardness

Surface treatment



55~60HRC

-

Ground

Bore





36/525

Module 4

44



S1 Shape


AH7 B C D E F G H I

MSGA4-15

MSGB4-15

m4

15 S125

3048 60 68 40 20 60

MSGA4-18

MSGB4-1818 S1

25

3050 72 80 40 20 60

MSGA4-20

MSGB4-2020 S1

28

3260 80 88 40 20 60

MSGA4-24

MSGB4-2424 S1

28

3260 96 104 40 20 60

MSGA4-25

MSGB4-2525 S1

30

3560 100 108 40 20 60

MSGA4-30

MSGB4-3030 S1

35

4070 120 128 40 20 60

MSGA4-35

MSGB4-3535 S1

35

4070 140 148 40 20 60

MSGA4-36

MSGB4-3636 S1

35

4070 144 152 40 20 60

MSGA4-40

MSGB4-4040 S1

40

4580 160 168 40 20 60

MSGA4-45

MSGB4-4545 S1

40

4580 180 188 40 20 60

MSGA4-48

MSGB4-4848 S2

40

4580 192 200 40 20 60 26 160

MSGA4-50

MSGB4-5050 S2

40

5085 200 208 40 20 60 26 168


Gears


37/52545

An example of KHKs inspection

report on various pitch errors.

The precision of spur gear (JIS B 1702-1) is

determined by factors such as single pitch error,

pitch variation error, accumulated pitch error,

tooth profile error, run out error, lead error etc.




S4 Shape


mmNOTE 3

Weight

kgCatalog No.


8 x 3.3

8 x 3.3585 302 59.7 30.8 0.14~0.24

0.93

0.83

MSGA4-15

MSGB4-15

8 x 3.3

8 x 3.3777 455 79.3 46.4 0.14~0.24

1.34

1.24

MSGA4-18

MSGB4-18

8 x 3.3

10 x 3.3910 574 92.8 58.6 0.14~0.24

1.72

1.63

MSGA4-20

MSGB4-20

8 x 3.3

10 x 3.31130 819 115 83.5 0.14~0.24

2.41

2.32

MSGA4-24

MSGB4-24

8 x 3.3

10 x 3.31190 896 122 91.4 0.14~0.24

2.56

2.44

MSGA4-25

MSGB4-25

10 x 3.3

12 x 3.31530 1320 156 134 0.16~0.26

3.69

3.54

MSGA4-30

MSGB4-30

10 x 3.3

12 x 3.31870 1820 191 185 0.16~0.26

4.97

4.83

MSGA4-35

MSGB4-35

10 x 3.3

12 x 3.31940 1930 198 197 0.16~0.26

5.25

5.11

MSGA4-36

MSGB4-36

12 x 3.3

14 x 3.82120 2290 216 234 0.16~0.26

6.49

6.33

MSGA4-40

MSGB4-40

12 x 3.3

14 x 3.82460 2930 251 299 0.16~0.26

8.17

8.01

MSGA4-45

MSGB4-45

12 x 3.3

14 x 3.82660 3350 272 342 0.16~0.26

7.97

7.81

MSGA4-48

MSGB4-48

12 x 3.3

14 x 3.82800 3650 285 372 0.16~0.26

8.71

8.37

MSGA4-50

MSGB4-50

Ground Spur Gears

Specifications

Precision grade

Gear teeth

Pressure angle

Material

Heat treatment

Standard full depth

20

SCM415

Overall carburizing

Tooth hardness

Surface treatment



55~60HRC

-

Ground

Bore





38/525

Module 1

46

NOTE 1:Secondary operations may be performed on these gears except for modification of the gear face width.

S1 Shape

Catalog No. Module No. of teeth ShapeBore Hub dia. Pitch dia. Outside dia. Face widthNOTE 1 Hub width Total length Keyway

AH7 B C D E F G Width Depth

SSG1-15SSG1-16

SSG1-17

SSG1-18

SSG1-19

m1.

1516

17

18

19

S1S1

S1

S1

S1

66

6

6

6

1213

14

15

16

1516

17

18

19

1718

19

20

21

8 10 18

SSG1-20

SSG1-21

SSG1-22

SSG1-23

SSG1-24

20

21

22

23

24

S1

S1

S1

S1

S1

6

8

8

8

8

17

18

18

20

20

20

21

q420 handbook of metric gears

Documents