AGMA 9112-B15-2015 Bores and Keyways for Flexible Couplings (Metric Series).pdf

1、ANSI/AGMA9112-B15 ANSI/AGMA 9112-B15 (Revision of ANSI/AGMA 9112-A04) American National Standard Bores and Keyways for Flexible Couplings (Metric Series)AMERICAN NATIONAL STANDARD ANSI/AGMA 9112-B15 AGMA 2015 All rights reserved ii Bores and Keyways for Flexible Couplings (Metric Series) ANSI/AGMA 9

2、112-B15 Revision of ANSI/AGMA 9112-A04 Approval of an American National Standard requires verification by ANSI that the requirements for due process, consensus and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board o

3、f 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 unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made t

4、oward their resolution. The use of American National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing or using products, processes or procedures not conforming to the st

5、andards. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the Am

6、erican National Standards Institute. Requests for interpretation of this standard should be addressed to the American Gear Manufacturers Association. CAUTION NOTICE: AGMA technical publications are subject to constant improvement, revision or withdrawal as dictated by experience. Any person who refe

7、rs to any AGMA Technical Publication should be sure that the publication is the latest available from the Association on the subject matter. Tables or other self-supporting sections may be referenced. Citations should read: See ANSI/AGMA 9112-B15, Bores and Keyways for Flexible Couplings (Metric Ser

8、ies), published by the American Gear Manufacturers Association, 1001 N. Fairfax Street, Suite 500, Alexandria, Virginia 22314, http:/www.agma.org. Approved February 4, 2015. ABSTRACT This standard describes sizes and tolerances for straight and tapered bores and the associated keys and keyways, as f

9、urnished in flexible couplings. The data in the standard considers commercially standard coupling bores and keyways, not special coupling bores and keyways that may require special tolerances. Published by American Gear Manufacturers Association 1001 N. Fairfax Street, Suite 500, Alexandria, Virgini

10、a 22314 Copyright 2015 by American Gear Manufacturers Association All rights reserved. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission of the publisher. Printed in the United States of America ISBN: 978-1-614

11、81-092-6 American National Standard AMERICAN NATIONAL STANDARD ANSI/AGMA 9112-B15 AGMA 2015 All rights reserved iii Contents Foreword . v 1 Scope . 1 1.1 Application . 1 1.2 Exceptions . 1 2 Normative references. 1 3 Symbols and definitions . 1 3.1 Symbols . 1 4 Bore measurement and surface finish .

12、 2 4.1 Bore measurement 2 4.2 Bore surface finish 2 5 Straight (finished) bored hubs 2 5.1 Standard bores 2 5.1.1 Hub bore to shaft fit . 2 5.1.2 Standard hub bore to shaft fits 2 5.1.3 Unspecified hub bore to shaft fits 5 5.2 Non-standard bores 5 5.3 Set screws . 5 6 Tapered bore hubs . 6 6.1 Typic

13、al tapered bores 6 6.2 Keyways 6 6.3 Tapered bore dimensional control requirements 6 6.4 Dimensioning of tapered bores . 6 7 Keys . 7 7.1 Key sizes . 7 8 Hub keyways 8 8.1 Classes of key-to-hub keyway fit. 8 8.1.1 Normal JS9 (default) . 8 8.1.2 Close P9 (fitted) . 8 8.2 Keyway sizes. 9 8.3 Keyway di

14、mensions and tolerances 9 8.3.1 Keyway width 9 8.3.2 Nominal keyway depth 11 8.3.3 Dimension from top of keyway to opposite side of bore . 11 8.3.4 Maximum keyway offset tolerance, N 11 8.3.5 Maximum keyway lead 11 8.3.6 Keyway parallelism 12 8.3.7 Multiple keyway index tolerance . 12 8.4 Methods of

15、 measurement . 13 8.5 Finish of keyways 13 8.6 Fillet radii in keyways 13 Bibliography 36 AMERICAN NATIONAL STANDARD ANSI/AGMA 9112-B15 AGMA 2015 All rights reserved iv Annexes Annex A Straight bore inspection methods . 14 Annex B Tapered bore inspection procedure and plug gauge accuracy requirement

16、s 15 Annex C Recommended design practice for conical shafts used with flexible couplings 18 Annex D Keyway measurement 21 Annex E Other bore/shaft tolerance combinations found in industry and the resulting fits 27 Tables Table 1 - Symbols . 2 Table 2. Recommended bores for metric shafts from ISO R77

17、5:1969, mm 3 Table 3. Key sizes for cylindrical shafts from ISO R773:1969, mm . 7 Table 4 - Key dimensions from ISO R773:1969, mm . 8 Table 5 - Recommended hub keyway dimensions, mm1) . 9 Table 6 - Hub keyway/key fits, mm . 10 Table 7 - Maximum keyway lead values . 11 Table 8 - Multiple keyway index

18、 tolerances 13 Figures Figure 1. Tapered bore requirements 6 Figure 2. Tapered bore drawing dimensions . 6 Figure 3 - Types of keys 7 Figure 4 - Keyway dimensions 10 Figure 5 - Keyway offset . 11 Figure 6 - Keyway lead . 12 Figure 7 - Keyway parallelism . 12 Figure 8 - Multiple keyway index . 12 AME

19、RICAN NATIONAL STANDARD ANSI/AGMA 9112-B15 AGMA 2015 All rights reserved v Foreword The foreword, footnotes and annexes, if any, in this document are provided for informational purposes only and are not to be construed as a part of ANSI/AGMA 9112-B15, Cylindrical Bores and Keyways for Flexible Coupl

20、ings (Metric Series). This standard incorporates information from the following International Organization for Standardization (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 Sys

21、tem of limits and fits - Tables of standard tolerance grades and limit deviations for holes and shafts; - ISO R773 (withdrawn 1998), Rectangular or Square Parallel Keys and their Corresponding Keyways; - ISO R775 (withdrawn 1998), Cylindrical and 1/10 Conical Shaft Ends; - ANSI/AGMA 9002-C14, Bores

22、and Keyways for Flexible Couplings (Inch Series). The intent of this document is to offer designers and users of flexible couplings preferred dimensions, tolerances and fits for metric bores and keyways. ANSI/AGMA 9112-B15 describes sizes and tolerances for straight and tapered bores and associated

23、keys and keyways, as furnished in metric flexible couplings. 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 that most closely relate to the bore and keyway fit classes fr

24、om ANSI/AGMA 9002-A86. A study of the existing metric standards indicated that the many possible combinations of shaft/bore fits would be impractical to adopt as an all-encompassing standard. Therefore, this standard does not intend to replace any existing metric standards, but to define what is pre

25、ferred. Note that this standard is a pure metric standard, and not a metric conversion of ANSI/AGMA 9002-C14 (Inch Series). In AGMA 9112-B15 the “measurement of bores” section was moved from an annex to clause 4, now becoming a part of the standard. Bores are to be measured prior to cutting the keyw

26、ay. The first draft of ANSI/AGMA 9112-B15 was made in April, 2011. It was approved by the AGMA membership in January 2015. It was approved as an American National Standard on February 4, 2015. Suggestions for improvement of this standard will be welcome. They may be submitted to techagma.org. AMERIC

27、AN NATIONAL STANDARD ANSI/AGMA 9112-B15 AGMA 2015 All rights reserved vi PERSONNEL of the AGMA Flexible Couplings Committee Chairman: Glenn Pokrandt Rexnord Coupling Operations Group (Retired) Vice Chairman: Todd Schatzka Rexnord Technical Services ACTIVE MEMBERS T.C. Glasener . Emerson Industrial A

28、utomation B.M. Greenlees A-C Equipment Services Corporation C.M. Hatseras KTR Corporation D.W. Hindman Rexnord Coupling Operations Group D.R. Lyle. Ameridrives Gear Coupling Operations S. McChesney Reich USA Corporation M. McGinnity Emerson Industrial Automation L. Riggs Emerson Industrial Automatio

29、n J. Sherred . Ameridrives Gear Coupling Operations E. Wilson Lovejoy, Inc. AGMA 2015 All rights reserved 1 AMERICAN NATIONAL STANDARD ANSI/AGMA 9112-B15 American National Standard - Bores and Keyways for Flexible Couplings (Metric Series) 1 Scope This standard presents metric dimensions, tolerances

30、, sizes and fits for straight bores, tapered bores, keys and keyways for unmounted industrial flexible couplings. The keys and keyways followed the recommendations of ISO R773:1969 and shaft tolerances followed ISO R775:1969. Shaft keyseat dimensions and tolerances were given in ISO R773:1969. This

31、specification includes index tolerances for multiple keyways. Inspection methods for straight and tapered bores and keyways are included in the annexes. The annexes also include the recommended design practice for tapered shafts for use with flexible couplings. 1.1 Application This standard is appli

32、cable to couplings as defined in ANSI/AGMA 9009-D02, Flexible Couplings - Nomenclature for Flexible Couplings, with metric bores and keyways. 1.2 Exceptions This standard does not apply to: - couplings attached to shafts without keys, see ANSI/AGMA 9103-B08; - couplings attached to shafts with taper

33、ed bushings or keyless shaft locking devices; - shafts and bores with tapered keys; - inch bores with metric keyways; - metric bores with inch keyways; - metric bores with metric keyways; or - shaft keyseat tolerances. See ANSI/AGMA 9002-C14 for inch bores with inch keyways. 2 Normative references T

34、he following standard contains provisions which, through reference in this text, constitute provisions of this American National Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this American National Sta

35、ndard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. ANSI/AGMA 9009-D02, Flexible Couplings - Nomenclature for Flexible Couplings 3 Symbols and definitions 3.1 Symbols The symbols used in this standard are shown in Table 1. NOTE: Th

36、e symbols and terms contained in this document may vary from those used in other AGMA standards. Users of this standard should assure themselves that they are using these symbols and terms in the manner indicated herein. AMERICAN NATIONAL STANDARD ANSI/AGMA 9112-B15 AGMA 2015 All rights reserved 2 T

37、able 1 - Symbols Symbol Description Units Where first used b Nominal key or keyway width mm Table 3 Dle Large end diameter of hub bore mm 6.3 Dg Gauge line diameter of hub bore mm Figure 2 Dse Small end diameter of hub bore mm 6.3 d Cylindrical shaft diameter mm Table 3 h Key height mm Table 3 Ikw M

38、ultiple keyway index tolerance mm 8.3.7 Lkw Maximum keyway lead mm 8.3.5 l Axial length of the tapered feature mm 6.3 N Maximum keyway offset tolerance mm 8.3.4 r Keyway or keyseat fillet radius mm Table 5 s Key chamfer mm Table 4 t1 Nominal shaft keyseat depth from top of nominal shaft at centerlin

39、e mm Figure 4 t2 Nominal hub keyway depth from top of nominal bore at centerline mm Table 5 Included angle degrees 6.3 4 Bore measurement and surface finish 4.1 Bore measurement The hub may distort when the keyway is machined; therefore, the bore diameter must be checked prior to cutting the keyway.

40、 See annex A for straight bore inspection methods and annex B for tapered bore methods. 4.2 Bore surface finish Machined finish bores normally have a surface finish of 3.2 Ra micrometers. For finishes better than 3.2 Ra micrometers, additional processes may be necessary. Keyless fit bores require an

41、 improved surface finish, see ANSI/AGMA 9103-B08. 5 Straight (finished) bored hubs 5.1 Standard bores Standard finished bore sizes and preferred tolerances are shown in Table 2. Keyway tolerances are in accordance with clause 8. NOTE: A bore size shown in Table 2 may or may not be a stock bore size

42、for each coupling manufacturer. 5.1.1 Hub bore to shaft fit Hub bore to shaft fit is the responsibility of the purchaser. Table 2 shows the resulting fits of the preferred shaft/bore combinations. 5.1.2 Standard hub bore to shaft fits This standard covers three classes of fits, clearance, transition

43、al and interference as shown in Table 2. Additional combinations of shaft/bore tolerancing and resulting fits, found in various specifications, are given in annex E. Use of the annex E combinations (or others) shall be approved by the coupling manufacturer. The type of hub bore to shaft fit selected

44、 is dependent on the type of coupling and service in which the couplings will be used. If a particular type of fit is desired, it shall be specified by the purchaser of the coupling. AMERICAN NATIONAL STANDARD ANSI/AGMA 9112-B15 AGMA 2015 All rights reserved 3 Table 2. Recommended bores for metric s

45、hafts from ISO R775:1969, mm Nominal diameter Shaft diameter Clearance fit Transitional fit Interference fit Hub bore Fit1) Hub bore Fit1) Hub bore Fit1) - - j6 F7 0.004 0.024 H7 -0.006 0.015 M6 -0.015 0.001 0.006 / -0.002 0.010 / 0.022 0.000 / 0.013 -0.009 / -0.001 6 6.006 / 5.998 6.010 / 6.022 6.0

46、00 / 6.013 5.991 / 5.999 6 j6 F7 0.0060.030 H7 -0.007 0.017 M6 -0.019 -0.001 0.007 / -0.002 0.013 / 0.028 0.000 / 0.015 -0.012 / -0.003 7 8 9 10 7.007 8.007 9.007 10.007 / / / / 6.998 7.998 8.998 9.998 7.013 8.013 9.013 10.013 / / / / 7.028 8.028 9.028 10.028 7.000 8.000 9.000 10.000 / / / / 7.015 8

47、.015 9.015 10.015 6.988 7.988 8.988 9.988 / / / / 6.997 7.997 8.997 9.997 10 j6 F7 0.008 0.037 H7 -0.008 0.021 M6 -0.023 -0.001 0.008 / -0.003 0.016 / 0.034 0.000 / 0.018 -0.015 / -0.004 11 12 14 16 18 11.008 12.008 14.008 16.008 18.008 / / / / / 10.997 11.997 13.997 15.997 17.997 11.016 12.016 14.0

48、16 16.016 18.016 / / / / / 11.034 12.034 14.034 16.034 18.034 11.000 12.000 14.000 16.000 18.000 / / / / / 11.018 12.018 14.018 16.018 18.018 10.985 11.985 13.985 15.985 17.985 / / / / / 10.996 11.996 13.996 15.996 17.996 18 j6 F7 0.011 0.045 H7 -0.009 0.025 M6 -0.026 0.000 0.009 / -0.004 0.020 / 0.

49、041 0.000 / 0.021 -0.017 / -0.004 19 20 22 24 25 28 30 19.009 20.009 22.009 24.009 25.009 28.009 30.009 / / / / / / / 18.996 19.996 21.996 23.996 24.996 27.996 29.996 19.020 20.020 22.020 24.020 25.020 28.020 30.020 / / / / / / / 19.041 20.041 22.041 24.041 25.041 28.041 30.041 19.000 20.000 22.000 24.000 25.000 28.000 30.000 / / / / / / / 19.021 20.021 22.021 24.021 25.021 28.021 30.021 18.983 19.983 21.983 23.983 24.983 27.983 29.983 / / / / / / / 18.996 19.996 21.996 23.996 24.996 27.996 29.996 30 k6 F7 0.007 0.048 H7 -0.018 0.023 K6 -0.031 0.001 0.