1、 ASME BLB*25-LM 9b 0759670 0574037 b7T The American Society of Mechanical Engineers AN AMERICAN NATIONAL STANDARD SQUARE AND RECTANGULAR KEYS AND KEYWAYS ASME B18.25.1 M-1 MM6 Date of Issuance: July 31, 1996 This Standard will be revised when the Society approves the issuance of a new edition. There
2、 will be no addenda or written interpretations of the requirements of this Standard issued to this edition. ASME is the registered trademark of The American Society of Mechanical Engineers. This code or standard was developed under procedures accredited as meeting the criteria for American National
3、Standards. The Consensus committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. The proposed code or standard was made available for public review and comment which provides an opportunity fo
4、r additional public input from industry, academia, regulatory agencies, and the public-at-large. ASME does not “approve,“ “rate,“ or “endorse“ any item, construction, proprietary device, or activity. ASME does not take any position with respect to the validity of any patent rights asserted in connec
5、tion with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable Letters Patent, nor assume any such liability. Users of a code or standard are expressly advised that determination of the validity of any
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7、bility for onlythose interpretations issued in accordance with governing ASME procedures and policies which preclude the issuance of interpretations by individual volunteers. No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior wri
8、tten permission of the publisher. The American Society of Mechanical Engineers 345 E. 47th Street New York, NY 10017 Copyright 8 1996 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A. ASME BLB.25.lM 9b 0759b70 0574039 442 FOREWORD (This Foreword is not part of ASM
9、E 818.25.1M-1996) In 1994 ASME Subcommittee B18.25 was created. This subcommittee then assumed the responsibilities of ANSI Standards Committee B 17. The first endeavor of this subcommittee was to create U.S. standards for metric Woodruff and square and rectangular keys. This Standard covering Woodr
10、uff keys is based on the IS0 standard with modifications to reflect U.S. manufacturing and user needs. The final document was balloted June 29, 1995. Following approval by ASME, the document was submitted to the American National Standards Institute. This Standard was approved by ANSI on February 5,
11、 1996. . 111 ASME STANDARDS COMMITTEE BI8 Standardization of Bolts, Nuts, Rivets, Screws, Washers, and Similar Fasteners (The following is the roster of the Committee at the time of approval of this Standard.) OFFICERS K. E. McCullough, Chair O. A. Clever, Vice Chair E. Schwartz, Vice Chair A. M. Ni
12、ckles, Secretary COMMITTEE PERSONNEL J. C. Akins, Safety Socket Screw Corp. J. B. Belford, Lawson Products, Inc. O. J. Broomfield, IlW Shakeproof J. A. Buda, SPS Technologies R. M. Byrne, Trade Association Management, Inc. D. A. Clever, Deere (6) specifies a key material hardness rather than a tensi
13、le property. 1.4 Tolerances Many of the tolerances shown in Tables 1 and 2 are from ANSI B4.2 (IS0 286-1 and IS0 286-2). As a result, in addition to plus-minus tolerances which are common in the U.S., some are expressed as plus-plus or minus-minus deviations from the basic size. For further interpre
14、tation of these tolerances refer to ANSI B4.2 or IS0 286. 1.5 Terminology For definitions of terms relating to fasteners or compo- nent features used in this Standard, refer to ANSI B 18.12, Glossary of Terms of Mechanical Fasteners. 1.6 Referenced Standards Referenced ASME standards may be obtained
15、 from The American Society of Mechanical Engineers, 22 Law Drive, Box 2300, Fairfield, New Jersey 07007-2300. Referenced IS0 standards may be obtained from the American National Standards Institute, 1 1 West 42nd Street, New York, NY 10036-8002. 1.7 Designation Keys conforming to this Standard shall
16、 be designated by the following data, preferably in the sequence shown: (a) ASME document number; (b) product name; (c) nominal size width (b) x height (h) x length; (d) form; (e) hardness (if other than non-hardened). 1.3 Dimensions EXAMPLES: (1) ASME B18.25.1M Square Key 3 x 3 x 15 form B. (2) ASM
17、E B18.2S.IM Rectangular Key IO x 6 x 20 form C Unless otherwise specified, all dimensions in this Standard are in millimeters (mm). hardened. 1 ASME BLB.25-LM 76 m 0757670 0574044 BOT m ASME B18.25.1M-1996 1.8 Preferred Lengths and Tolerances Preferred lengths and tolerances of square and rectan- gu
18、lar keys are shown below. Tolerances are JS16. To minimize problems due to lack of straightness, key length should be less than 10 times the key width. Length ?Tolerances 6 8, 10 12, 14, 16, 18 20, 22, 25, 28 32, 36, 40, 45, 50 56, 63, 70, 80 90, 100, 110 125, 140, 150, 180 200, 220, 250 280 320, 36
19、0, 400 0.38 0.45 0.56 0.65 0.8 0.95 1.1 1.25 I .45 1.6 I .8 SQUARE AND RECTANGULAR KEYS AND KEYWAYS 2 REQUIREMENTS 2.1 Material Standard steel keys shall have a hardness of 183 HV minimum. Hardened keys shall be alloy steel through hardened to a Vickers hardness of 390 to 510 HV. When other material
20、s and properties are required, these shall be as agreed upon by the supplier and customer. 2.2 Dimensions and Tolerances Dimensions and tolerances for square and rectangular keys are shown in Table 1. Recommended dimensions and tolerances for keyways are shown in Table 2. 2 ASME BL8.25.LM b W 075967
21、0 0574045 74b Width, b Tolerance Basic Size h8 SQUARE AND RECTANGULAR KEYS AND KEYWAYS ASME B18.25.1M-1996 Thickness, Chamfer or Radius, h s Range of Lengths Basic Size Sq. h8; Rect. hll Min. Max. From To Tolerance y i. Sharp edges removed not to exceed s rnax. b Y 2 3 4 5 6 I Style A Style B style
22、c 2 O O -0.014 -0.014 3 4 5 O O -0.018 6 -0.018 TABLE 1 DIMENSIONS FOR SQUARE AND RECTANGULAR PARALLEL KEYS 0.16 0.25 6 20 Note il) 0.25 6 36 Note (111 8 45 Note (111 10 56 Note i111 0.40 14 70 Note (I) 5 6 8 8 10 10 12 12 14 14 3 O -0.018 4 O O -0.060 5 -0.075 0.25 7 O -0.090 O 6 O -0.022 -0.075 8
23、O 0.40 -0.090 6 O -0.075 8 O -0.090 6 O -0.075 0.40 O 9 -0.027 Rectangular Keys 56 Note (111 70 Note (1) 90 Note (1)l 110 Note (111 140 Note (li1 160 Note (li1 180 Note (1)l 200 Note (111 (Table 1 continues on next page) 3 ASME BL8*25.l! 96 0759670 0574046 682 Width, b Tolerance Basic Size h8 Thickn
24、ess, Chamfer or Radius, h 5 Range of Lengths Basic Size Sq. h8; Rect. hll Min. Max. From To Tolerance 1 O0 -0.054 ASME 818.25.1M-1996 SQUARE AND RECTANGULAR KEYS AND KEYWAYS TABLE 1 DIMENSIONS FOR SQUARE AND RECTANGULAR PARALLEL KEYS (CONTDI 56 2o I 8 O -0.090 220 Note ilil Note (111 Note (111 Note
25、(111 260 280 320 2o I 12 O -0.110 63 22 I 6 O -0.075 70 22 I o 14 O -0.110 80 -0.033 3 9 O -0.090 90 360 Note (111 0.60 0.80 25 I 14 O -0.110 1 O0 400 Note il) 28 I 10 O -0.090 28 I 16 11 18 12 O -0.110 1.20 O 36 I -0.039 20 22 25 28 O 0.130 40 I 1 .o0 45 I 32 32 36 40 45 50 -0.046 O 1.60 2.00 O -0.
26、160 90 I o 2.50 3.00 (1) See 1.8 for preferred maximum length of key. 4 ASME BLBo25mLM 9b m 0759b70 0574047 519 m SQUARE AND RECTANGULAR KEYS AND KEYWAYS ASME 818.25.1M-1996 I z o o lx In m 8 50 O I I I 7 o 99 O0 JI- 8r 99 O0 I I 5 ASME B18.25.1M-1996 SQUARE AND RECTANGULAR KEYS AND KEYWAYS W c d t
27、O U2 2 x s i a I I I 20 + r O0 + 20 + 20 + e gc a I x /U2 I zz 88 II WOO Nao II 88 Al- 99 WU2 SN O0 WW (YN +I 88 77 mm 99 +P 2k N* O0 99 Q 9 O0 N LD O0 9 s1 9 O0 NN (o W OLD0 mm m m *in 0 O“ 2 E Y 6 ASME BL8.25.LM 96 m 0759670 0574049 391 m SQUARE AND RECTANGULAR KEYS AND KEYWAYS I I I Loui 33 88 +I
28、 b OD O0 9 ASME B18.25.1M-1996 7 ASME BL8-25.lM 96 0757670 0574050 003 AMERICAN NATIONAL STANDARDS FOR BOLTS. NUTS. RIVETS. SCREWS. WASHERS. AND SIMILAR FASTENERS Small Solid Rivets . B18.1.1-1972(R1995) Large Rivets B18.1.2-1972(R1995) Metric Small Solid Rivets .B18.1.3 M.l983(R1995) Square and Hex
29、 Bolts and Screws - Inch Series . B18.2.1-1981(R1992) Square and Hex Nuts (Inch Series) B18.2.2-1987(R1993) Metric Hex Cap Screws . B18.2.3.lM-l979(R1995) Metric Formed Hex Screws B18.2.3.2M-l979(R1995) Metric Heavy Hex Screws . Bl8.2.3.3M-l979(R1995) Metric Hex Flange Screws . Bl8.2.3.4M-l984(R1995
30、) Metric Hex Bolts . Bl8.2.3.5M-l979(R1995) Metric Heavy Hex Bolts . B18.2.3.6M-l979(Rl995) Metric Heavy Hex Structural Bolts Bl8.2.3.7M-l979(R1995) Metric Hex Lag Screws . B18.2.3.8M-l98l(R1991) Metric Heavy Hex Flange Screws Bl8.2.3.9M-l984(R1995) Metric Hex Nuts, Style 1 818.2.4.1M-l979(R1995) Me
31、tric Hex Nuts. Style 2 B18.2.4.2M-l979(R1995) Metric Slotted Hex Nuts . B18.2.4.3M-l979(R1995) Metric Hex Flange Nuts . B18.4.4.4M-l982(R1993) Metric Hex Jam Nuts . B18.2.4.5M-l979(R1990) Metric Heavy Hex Nuts . B18.2.4.6M-l979(R1990) Socket Cap. Shoulder and Set Screws - Inch Series B18.3-1986(R199
32、5) Socket Head Cap Screws (Metric Series) . .B18.3.1 M.1986iR1993) Metric Series Hexagon Keys and Bits .B18.3.2 M.l979(R1990) Hexagon Socket Head Shoulder Screws (Metric Series) .B18.3.3 M.1986R1993) Hexagon Socket Button Head Cap Screws (Metric Series) .B18.3.4 M.l986(R1993) Hexagon Socket Flat Cou
33、ntersunk Head Cap Screws (Metric Series) .B18.3.5 M.l986(Rl993) Metric Series Socket Set Screws .B18.3.6 M.l986(R1993) Round Head Bolts (Inch Series) . 818.5-1990 Metric Round Head Short Square Neck Bolts . B18.5.2.1M-l981(R1995) Metric Round Head Square Neck Bolts . .818.5.2.2 M.1982 Round Head Squ
34、are Neck Bolts With Large Head (Metric Series) .B18.5.2.3 M.1990 Wood Screws (Inch Series) . B18.6.1-1981(R1991) Slotted Head Cap Screws, Square Head Set Screws, and Slotted Headless Set Screws B18.6.2-1972(R1993) Machine Screws and Machine Screw Nuts . B18.6.3-1972(R1983) Thread Forming and Thread
35、Cutting Tapping Screws and Meta I I ic Drive Screws (Inch Series) B 18.6.4-1 981 (R 1991 ) Metric Thread Forming and Thread Cutting Tapping Screws . .B18.6.5 M.l986(R1993) Metric Machine Screws .B18.6.7 M.1985R1993) General Purpose Semi-Tubular Rivets. Full Tubular Rivets. Split Rivets and Rivet Cap
36、s B18.7-1972(R1992) Metric General Purpose Semi-Tubular Rivets . .B18.7.1 M.l984(R1992) Clevis Pins and Cotter Pins (Inch Series) 818.8.1-1994 Spring Pins - Coiled Type (Metric Series) B18.8.3M-1995 Spring Pins - Slotted (Metric Series) B18.8.4M-1994 Machine Dowel Pins - Hardened Ground (Metric Seri
37、es) . B18.8.5M-1994 Cotter Pins (Metric Series) . B18.8.6M-1995 Headless Clevis Pins (Metric Series) . B18.8.7M-1994 Headed Clevis Pins (Metric Series) . B18.8.8M-1994 PIOW Bolts B18.9-1958(R1995) Track Bolts and Nuts .B18.1 0.1982(R1992) Miniature Screws . ,B18.11-1961(R1992) Glossary of Terms for
38、Mechanical Fasteners . B18.12-1962(R1991) Screw and Washer Assemblies - Sems (Inch Series) . . B18.13-1987(R1993) Screw and Washer Assemblies -Sems (Metric Series) . B18.13.1M-1991 Forged Eyebolts . B18.15-1985(R1995) Mechanical and Performance Requirements for Prevailing-Torque Type Steel Metric He
39、x Nuts and Hex Flange Nuts . .B18.16.1 M.l979(Rl995) Torque-Tension Test Requirements for Prevailing-Torque Type Steel Metric Hex Nuts and Hex Flange Nuts . .B18.16.2 M.l979(R1995) Taper Pins. Dowel Pins, Straight Pins, Grooved Pins, and Spring Pins (Inch Series) B18.8.2-1995 Dimensional Requirement
40、s for Prevailing-Torque Type Steel Metric Hex Nuts and Hex Flange Nuts .B18.16.3 M-1982iR1993) Wing Nuts. Thumb Screws. and Wing Screws . B18.17-1968(R1983) Inspection and Quality Assurance for Special Purpose Fasteners .B18.18.3 M.1987iR1993) Inspection and Quality Assurance for General Purpose Fas
41、teners .B18.1 8.1 M-I987(R1993) Inspection and Quality Assurance for High-Volume Machine Assembly Fasteners . .B18.18.2 M-1987iR1993) Inspection and Quality Assurance for Fasteners for Highly Specialized Engineered Applications .B18.18.4 M-1987R1993) Lock Washers (Inch Series) . 818.21.1-1994 Lock W
42、ashers (Metric Series) . B18.21.2M-1994 Metric Plain Washers . B18.22M-I981(R1990) Plain Washers . B18.22.1-1965(R1990) Square and Rectangular Keys and Keyways B18.25.1M-1996 Woodruff Keys and Keyways . B18.25.2M-1996 Helical Coil Screw Thread Inserts (Inch Series) . B18.29.1-1993 The ASME Publications Catalog shows a complete list of all the Standards published by the Society . For a complimentary catalog. or the latest information about our publications. call I-800-THE-ASME (1.800.843.2763) .
