1、ANSI/AGMA9112-A04ANSI/AGMA 9112-A04AMERICAN NATIONAL STANDARDBores and Keyways for Flexible Couplings(Metric Series)Copyright American Gear Manufacturers Association Provided by IHS under license with AGMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-iiBores and
2、Keyways for Flexible Couplings (Metric Series)ANSI/AGMA 9112-A04Approval of an American National Standard requires verification by ANSI that the require-ments for due process, consensus, and other criteria for approval have been met by thestandards developer.Consensus is established when, in the jud
3、gment of the ANSI Board of Standards Review,substantial agreement has been reached by directly and materially affected interests.Substantial agreement means much more than a simple majority, but not necessarily una-nimity. Consensus requires that all views and objections be considered, and that acon
4、certed effort be made toward their resolution.The use of American National Standards is completely voluntary; their existence does notin any respect preclude anyone, whether he has approved the standards or not, frommanufacturing, marketing, purchasing, or using products, processes, or procedures no
5、tconforming to the standards.The American National Standards Institute does not develop standards and will in nocircumstances give an interpretation of any American National Standard. Moreover, noperson shall have the right or authority to issue an interpretation of an American NationalStandard in t
6、he name of the American National Standards Institute. Requests for interpre-tation of this standard should be addressed to the American Gear ManufacturersAssociation.CAUTION NOTICE: AGMA technical publications are subject to constant improvement,revision, or withdrawal as dictated by experience. Any
7、 person who refers to any AGMAtechnical publication should be sure that the publication is the latest available from the As-sociation on the subject matter.Tables or other self-supporting sections may be referenced. Citations should read: SeeANSI/AGMA 9112-A04, Bores and Keyways for Flexible Couplin
8、gs (Metric Series), pub-lished by the American Gear Manufacturers Association, 500 Montgomery Street, Suite350, Alexandria, Virginia 22314, http:/www.agma.org.Approved May 5, 2005ABSTRACTThis standard describes sizes and tolerances for straight and tapered bores and the associated keys and key-ways,
9、 as furnished in flexible couplings. The data in the standard considers commercially standard couplingbores and keyways, not special coupling bores and keyways that may require special tolerances.Published byAmerican Gear Manufacturers Association500 Montgomery Street, Suite 350, Alexandria, Virgini
10、a 22314Copyright 2005 by American Gear Manufacturers AssociationAll rights reserved.No part of this publication may be reproduced in any form, in an electronicretrieval system or otherwise, without prior written permission of the publisher.Printed in the United States of AmericaISBN: 1-55589-842-4Am
11、ericanNationalStandardCopyright American Gear Manufacturers Association Provided by IHS under license with AGMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI/AGMA 9112-A04AMERICAN NATIONAL STANDARDiii AGMA 2004 - All rights reservedContentsPageForeword iv.1 S
12、cope 1.2 Normative references 1.3 Symbols and definitions 1.4 Straight (finished) bored hubs 25 Tapered bore hubs 56Keys 57 Hub keyways 7.Bibliography 33.AnnexesA Straight bore inspection methods 12B Tapered bore inspection procedure and plug gauge accuracyrequirements 13C Recommended design practic
13、e for conical shafts used with flexiblecouplings 16.D Keyway measurement 19E Other bore/shaft tolerance combinations found in industry and theresulting fits 24.Figures1 Tapered bore requirements 5.2 Tapered bore drawing dimensions 5.3 Types of keys 74 Keyway dimensions 7.5Keywayofset 96 Keyway lead
14、107 Keyway parallelism 108 Multiple keyway index 11Tables1 Symbols 1.2 Recommended bores for metric shafts from ISO/R775:1969 33 Key sizes for cylindrical shafts from ISO R773:1969 6.4 Key dimensions from ISO R773:1969 65 Recommended hub keyway dimensions 8.6 Hub keyway/key fits 9.7 Maximum keyway l
15、ead values 10.8 Multiple keyway index tolerances 10Copyright American Gear Manufacturers Association Provided by IHS under license with AGMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI/AGMA 9112-A04 AMERICAN NATIONAL STANDARDiv AGMA 2004 - All rights reserv
16、edForewordThe foreword, footnotes and annexes, if any, in this document are provided forinformational purposes only and are not to be construed as a part of ANSI/AGMA9112-A04, Bores and Keyways for Flexible Couplings (Metric Series).This standard incorporates information from the following Internati
17、onal Organization forStandardization (ISO) and American National standards Institute (ANSI) standards:- ISO 286-1, ISO System of limits and fits - Bases of tolerances, deviations and fits- ISO 286-2, ISO System of limits and fits - Tables of standard tolerance grades andlimit deviations for holes an
18、d shafts- ISO R773 (withdrawn 1998), Rectangular or Square Parallel Keys and theirCorresponding Keyways- ISO R775 (withdrawn 1998), Cylindrical and 1/10 Conical Shaft Ends- ANSI/AGMA 9002-B04, Bores and Keyways for Flexible Couplings (Inch Series)The intent of this document is to offer designers and
19、 users of flexible couplings preferreddimensions, tolerances and fits for metric bores and keyways.This standard incorporates a small portion of the numerous variations of shaft/bore fits.These fits and tolerances have been determined to be the preferred fits and tolerances thatmost closely relate t
20、o the bore and keyway fit classes from ANSI/AGMA 9002-A86. A studyof the existing metric standards indicated that the many possible combinations of shaft/borefits would be impractical to adopt as an all encompassing standard. Therefore, thisstandard does not intend to replace any existing metric sta
21、ndards, but to define what ispreferred.The first draft of ANSI/AGMA 9112-A04 was made in May, 2001. It was approved by theAGMA membership in October 23, 2004. It was approved as an American NationalStandard on May 5, 2005.Suggestions for improvement of this standard will be welcome. They should be s
22、ent to theAmerican Gear Manufacturers Association, 500 Montgomery Street, Suite 350, Alexandria,Virginia 22314.Copyright American Gear Manufacturers Association Provided by IHS under license with AGMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI/AGMA 9112-A0
23、4AMERICAN NATIONAL STANDARDv AGMA 2004 - All rights reservedPERSONNEL of the AGMA Flexible Couplings CommitteeChairman: Glenn Pokrandt Falk Corporation.Vice Chairman: Jim Paluh Ameridrives CouplingACTIVE MEMBERST. Hewitt Lord Corporation.D. Hindman Falk Corporation.D. Lyle Ameridrives Coupling.H.A.
24、Lynn, III Falk CorporationJ.W. Mahan Lovejoy, IncJ.R. Mancuso Kop-Flex/Emerson Power Transmission.T. Schatzka Rexnord Industries, IncJ. Sherred Ameridrives CouplingR.G. Thompson System Components, IncR. Whitney Riverhawk Company.ASSOCIATE MEMBERSL.E. Baer TB Woods IncT. Cain Riverhawk Company.T.A. G
25、eiger Falk Corporation.K.R. Gray Metal Improvement CompanyD. Lindsay EPT GearingJ. Mayhan Xtek, Inc.M.A. ONeil Riverhawk Company.E.I. Rivin Wayne State University.Copyright American Gear Manufacturers Association Provided by IHS under license with AGMANot for ResaleNo reproduction or networking perm
26、itted without license from IHS-,-,-ANSI/AGMA 9112-A04 AMERICAN NATIONAL STANDARDvi AGMA 2004 - All rights reserved(This page is intentionally blank)Copyright American Gear Manufacturers Association Provided by IHS under license with AGMANot for ResaleNo reproduction or networking permitted without l
27、icense from IHS-,-,-1 AGMA 2004 - All rights reservedANSI/AGMA 9112-A04AMERICAN NATIONAL STANDARDAmerican National Standard -Bores and Keyways forFlexible Couplings(Metric Series)1 ScopeThis standard presents metric dimensions, toler-ances, sizes and fits for straight bores, taperedbores, keys and k
28、eyways for unmounted industrialflexible couplings. The keys and keyways followedthe recommendations of ISO R773:1969 and shafttolerances followed ISO R775:1969. Shaft keyseatdimensions and tolerances were given in ISOR773:1969. This specification includes index toler-ances for multiple keyways.Inspe
29、ction methods for straight and tapered boresand keyways are included in the annexes. Theannexes also include the recommended designpractice for tapered shafts for use with flexiblecouplings.1.1 Application areaThis standard is applicable to couplings as defined inANSI/AGMA 9009-D02, Nomenclature for
30、 FlexibleCouplings, with metric bores and keyways.1.2 Excluded areaThis standard does not apply to couplings attachedto shafts without keys (see ANSI/AGMA 9003-A91),shafts and bores with tapered keys, inch bores withmetric keyways, metric bores with inch keyways,inch bores with inch keyways, or shaf
31、t keyseattolerances. See ANSI/AGMA 9002-B04 for inchbores with inch keyways.2 Normative referencesThe following standards contain provisions which,through reference in this text, constitute provisions ofthis American National Standard. At the time ofpublication, the editions indicated were valid. Al
32、lstandards are subject to revision, and parties toagreements based on the American National Stan-dard are encouraged to investigate the possibility ofapplying the most recent editions of the standardslisted.ANSI/AGMA 9009-D02, Flexible Couplings -Nomenclature for Flexible Couplings3 Symbols and defi
33、nitions3.1 SymbolsThe symbols used in this standard are shown intable 1.NOTE: The symbols and terms contained in thisdocument may vary from those used in other AGMAstandards. Users of this standard should assure them-selves that they are using these symbols and terms inthe manner indicated herein.Ta
34、ble 1 - SymbolsSymbol Description Units First usedb Key width mm Table 3DbLarge end diameter of hub bore mm Figure 1DgGauge line diameter of hub bore mm Figure 2DseSmall end diameter of hub bore mm 5.3d Cylindrical shaft diameter mm Table 3h Key height mm Table 3IkwMultiple keyway index tolerance mm
35、 7.3.7LkwMaximum keyway lead mm 7.3.5l Axial length of the tapered feature mm 5.3(continued)Copyright American Gear Manufacturers Association Provided by IHS under license with AGMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI/AGMA 9112-A04 AMERICAN NATIONAL
36、 STANDARD2 AGMA 2004 - All rights reservedTable 1 (concluded)Symbol Description Units First usedN Keyway offset tolerance mm 7.3.4r Keyway or keyseat fillet radius mm Figure 4s Key chamfer mm Table 4t1Nominal shaft keyseat depth from top of nominal shaft at centerline mm Figure 4t2Nominal hub keyway
37、 depth from top of nominal bore at centerline mm Figure 4 Included angle degrees 5.34 Straight (finished) bored hubs4.1 Standard boresStandard finished bore sizes and preferred toler-ances are shown in table 2. Keyway tolerances arein accordance with clause 7.NOTE: A bore size shown in table 2 may o
38、r may not bea stock bore size for each coupling manufacturer.4.1.1 Shaft-to-hub fitShaft-to-hub fit is the responsibility of the purchas-er. Table 2 shows the resulting fits of the preferredshaft/bore combinations.4.1.2 Standard shaft-to-hub fitsThis standard covers three classes of fits, clearance,
39、transitional and interference as shown in table 2.Additional combinations of shaft/bore tolerancingand resulting fits, found in various specifications, aregiven in annex E. Use of the annex E combinations(or others) shall be approved by the couplingmanufacturer. The type of shaft-to-hub fit selected
40、is dependent on the type of coupling and service inwhich the coupling will be used. If a particular type offit is desired, it shall be specified by the purchaser ofthe coupling.4.1.2.1 Clearance fitsClearance fits are normally used to facilitate assem-bly and disassembly of coupling hub(s). Factors
41、tobe considered when using clearance fits include:- axial positioning and securing of coupling hub(s)during operation;- when couplings are used for axial location of con-nected equipment (limited end float);- the effect of hub-to-shaft clearance on couplingbalance and coupling life;- fretting of sha
42、ft and hub bore.4.1.2.2 Transitional fitsTransitional fits result in the possibility of a clearanceor interference fit as a result of the tolerances of bothshaft and hub bore. The average fit is “size on size”.Transitional fits result when H7 bore tolerances areused in conjunction with the shaft tol
43、erances fromISO R775:1969.4.1.2.3 Interference fitsInterference fits are normally used to:- maintain positive axial location of the hub(s) onthe shaft(s) during operation;- preserve the inherent balance quality of the cou-pling;- minimize fretting of the shaft and bore.Nominal interference fit rate
44、is 0.0005 mm/mm ofdiameter. Some applications may require greaterinterference fit. The coupling purchaser shall advisethe coupling manufacturer when a heavier interfer-ence fit is required. Heavier fits can influence thecoupling design and materials selected.4.1.3 Unspecified hub-to-shaft fitsWhen t
45、he purchaser does not specify the hub-to-shaft fit required, the coupling manufacturer will borethe coupling to their standard tolerance in accor-dance with one of the fits given in table 2. Thepurchaser is responsible for the resulting fit.4.2 Non-standard boresNon-standard bores are produced to di
46、mensionsand tolerances which are outside this standard.4.3 Set screwsSet screws, when furnished for use with keys, shallbe in accordance with each coupling manufacturersstandard, unless otherwise specified by thepurchaser.4.4 Bore surface finishMachine finished bores shall have a surface finishnorma
47、lly in the range of 1.6 to 3.2 Ra micrometers.For finishes better than 3.2 Ra micrometers, addi-tional processes may be necessary.Copyright American Gear Manufacturers Association Provided by IHS under license with AGMANot for ResaleNo reproduction or networking permitted without license from IHS-,-
48、,-ANSI/AGMA 9112-A04AMERICAN NATIONAL STANDARD3 AGMA 2004 - All rights reservedTable 2 - Recommended bores for metric shafts from ISO/R775:1969, mmNominaldi tShaft diameter Clearance fit Transitional fit Interference fitdiameterHub bore Fit1)Hub bore Fit1)Hub bore Fit1)- - j6 F7 0.008 H7 -0.008 M6 -
49、0.0230.008 / -0.003 0.016 / 0.0340.0370.000 / 0.0180.021-0.015 / -0.004-0.0011214161812.00814.00816.00818.008/11.99713.99715.99717.99712.01614.01616.01618.016/12.03414.03416.03418.03412.00014.00016.00018.000/12.01814.01816.01818.01811.98513.98515.98517.985/11.99613.99615.99617.99618 j6 F7 0.011 H7 -0.0
