q420 handbook of metric gears
TRANSCRIPT
-
7/27/2019 Q420 Handbook of Metric Gears
1/525
-
7/27/2019 Q420 Handbook of Metric Gears
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
-
7/27/2019 Q420 Handbook of Metric Gears
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
-
7/27/2019 Q420 Handbook of Metric Gears
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
-
7/27/2019 Q420 Handbook of Metric Gears
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.
-
7/27/2019 Q420 Handbook of Metric Gears
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
-
7/27/2019 Q420 Handbook of Metric Gears
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
-
7/27/2019 Q420 Handbook of Metric Gears
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
-
7/27/2019 Q420 Handbook of Metric Gears
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
-
7/27/2019 Q420 Handbook of Metric Gears
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
-
7/27/2019 Q420 Handbook of Metric Gears
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
Reduction Ratio 1/20~1/60
KWG, AG Ground WormShafts & Worm Wheels
KWG, AGF Ground WormShafts & Worm Wheels
Reduction Ratio 1/10~1/60
SWG, AG Ground Worms& Worm Wheels
Page 320
SW, BG Worms & BronzeWorm Wheels
Reduction Ratio 1/10~1/50
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
Reduction Ratio 1/10~1/60
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
-
7/27/2019 Q420 Handbook of Metric Gears
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.
-
7/27/2019 Q420 Handbook of Metric 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.)
-
7/27/2019 Q420 Handbook of Metric Gears
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
-
7/27/2019 Q420 Handbook of Metric Gears
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
-
7/27/2019 Q420 Handbook of Metric Gears
16/525
NOTES
XV I
-
7/27/2019 Q420 Handbook of Metric Gears
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
-
7/27/2019 Q420 Handbook of Metric Gears
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
-
7/27/2019 Q420 Handbook of Metric Gears
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
-
7/27/2019 Q420 Handbook of Metric Gears
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
-
7/27/2019 Q420 Handbook of Metric 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.
KHKTechnicalInformation
Application Hints
11
12
-
7/27/2019 Q420 Handbook of Metric Gears
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
-
7/27/2019 Q420 Handbook of Metric 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)
KHKTechnicalInformation
-
7/27/2019 Q420 Handbook of Metric 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.
~
~
~ ~
~
-
7/27/2019 Q420 Handbook of Metric Gears
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)
.
KHKTechnicalInformation
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
-
7/27/2019 Q420 Handbook of Metric Gears
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
-
7/27/2019 Q420 Handbook of Metric Gears
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)
-
7/27/2019 Q420 Handbook of Metric Gears
28/52536
Module 1.5
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
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
MSGA1.5-15
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
-
7/27/2019 Q420 Handbook of Metric Gears
29/52537
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.
Keyway NOTE 1 Allowable torqueNm)NOTE 2 Allowable torquekgfm Backlash
mmNOTE 3
Weight
kgCatalog No.
Width Depth Bending strength Surface durability Bending strength Surface durability
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
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)
-
7/27/2019 Q420 Handbook of Metric Gears
30/525
S1 Shape
Module 2
38
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.
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
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
MSGA(B) Ground Spur Gears 2Module
Gears
-
7/27/2019 Q420 Handbook of Metric Gears
31/52539
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.
S4 Shape
Keyway NOTE 1 Allowable torqueNm)NOTE 2 Allowable torquekgfm Backlash
mmNOTE 3
Weight
kgCatalog No.
Width Depth Bending strength Surface durability Bending strength Surface durability
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
Tooth 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)
-
7/27/2019 Q420 Handbook of Metric Gears
32/525
Module 2.5
40
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
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
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
-
7/27/2019 Q420 Handbook of Metric 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.
NOTE 3:The backlash values shown in the table are the theoretical values of a pair of identical gears in mesh.
S4 Shape
Keyway NOTE 1 Allowable torqueNm)NOTE 2 Allowable torquekgfm Backlash
mmNOTE 3
Weight
kgCatalog No.
Width Depth Bending strength Surface durability Bending strength Surface durability
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
Tooth 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)
-
7/27/2019 Q420 Handbook of Metric Gears
34/525
Module 3
42
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
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
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
MSGA(B) Ground Spur Gears 3Module
Gears
-
7/27/2019 Q420 Handbook of Metric 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.
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.
S4 Shape
Keyway NOTE 1 Allowable torqueNm)NOTE 2 Allowable torquekgfm Backlash
mmNOTE 3
Weight
kgCatalog No.
Width Depth Bending strength Surface durability Bending strength Surface durability
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
Tooth 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)
-
7/27/2019 Q420 Handbook of Metric Gears
36/525
Module 4
44
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
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
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
MSGA(B) Ground Spur Gears 4Module
Gears
-
7/27/2019 Q420 Handbook of Metric 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.
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.
S4 Shape
Keyway NOTE 1 Allowable torqueNm)NOTE 2 Allowable torquekgfm Backlash
mmNOTE 3
Weight
kgCatalog No.
Width Depth Bending strength Surface durability Bending strength Surface durability
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
Tooth 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)
-
7/27/2019 Q420 Handbook of Metric Gears
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