Asme b18 25 1m 1996 (2003) (american society of mechanical engineers)

FOR CURRENT COMMITTEE PERSONNEL PLEASE E-MAIL CS@asme.org Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled when REAFFIRMED 2003 SIUARE AND RECTANGULAR KEYS AND KEYWAYS ASME B18.25.1 M-1996 Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled wh The American Society of Mechanical Engineers This Standard will be revised when the Society approves the issuance of a new edition There 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 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 for additional public input from academia, industry, 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 i n connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable Patent, Letters nor assume any such liability Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their o w n responsibility Participation by federal agency representative(s) or person(s) affiliated with industry is t o not be interpreted as government or industry endorsement of this code or standard ASME accepts responsibilityfor 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 written permission of the publisher The American Society of Mechanical Engineers 345 E 47thStreet New York, NY 10017 Copyright 1996 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed i n U.S.A Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled wh Date of Issuance: July 31, 1996 (This Foreword is not part of ASME 818.25.1M-1996) In 1994ASMESubcommittee B18.25 was created.Thissubcommittee 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 squareandrectangular keys ThisStandardcovering Woodruff keysis based on the IS0 standard with modifications to reflect U.S manufacturing and user needs The final document was balloted June29, 1995 Followingapproval by ASME, the document was submitted to the American National StandardsInstitute.ThisStandard was approved by ANSI on February 5, 1996 111 Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled w FOREWORD (The following is the roster of the Committee at the time of approvalof this Standard.) OFFICERS K E McCullough, Chair D A Clever, Vice Chair E Schwartz, Vice Chair A M Nickles, Secretary COMMITTEE PERSONNEL J C Akins, Safety Socket Screw Corp J Belford, Lawson Products, Inc D J Broomfield, ITW Shakeproof J A Buda, SPS Technologies R M Byrne, Trade Association Management, Inc D A Clever, Deere & Co A P Cookman, Ford Motor Co T Collier, Cam-Tech Industries, Inc A C DiCola, Wrought Washer Manufacturer, Inc B A Dusina, Federal Screw Works G A Gobb, Consultant R J Harrington, Spirol International Corp A Herskovitz, U S Army ARDEC A C Hood, ACH Technologies F W Kern, Society of Automotive Engineers W H Kopke, ITW Shakeproof Industrial Products P D.Korsmo, Consultant J G Langenstein, Caterpillar, Inc M Levinson, ITW Shakeproof J Levy, Consultant A D McCrindle, Stelco Fasteners, Ltd K E McCullough, Consultant D J Miley, Caterpillar, Inc M D Prasad, General Motors Corp W Schevey, BGM Fastener Co E Schwartz, Consultant R M Serabin, Bowman Distribution R D.Strong, General Motors Corp J F Sullivan, National Fasteners Distribution Assoc R L Tennis, Caterpillar, Inc S W V a s , Lake Erie Screw Corp R G Weber, BE1 School of Engineering C J Wilson, Industrial Fasteners Institute R Wright, Wright Tool Co J G Zeratsky, National Rivet & Mfg Co V Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled wh ASME STANDARDS COMMITTEE B18 Standardization of Bolts, Nuts, Rivets, Screws, Washers, and Similar Fasteners - KEYS AND KEYWAYS J G Langenstein, Chair, Caterpillar, Inc D A Clever, Deere 84 Co A Herskovitz, U S Army ARDEC W H Kopke, IMI Shakeproof Industrial Products K E McCullough, Consiltant R S Merrick, Jr., Standard Horse Nail Corp J F Sullivan, National Fasteners Distribution Assoc D J Trinko, Medalist Inc C J Wilson, Industrial Fasteners Institute vi Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled w SUBCOMMITTEE 25 Foreword Standards Committee Roster 111 v introductory Notes 1.1 Scope 1.2 Comparison With IS0 R773-1969 and 2491-1974 1.3 Dimensions 1.4 Tolerances 1.5 Terminology 1.6 Referenced Standards 1.7 Designation 1.8 Preferred Lengths and Tolerances 1 1 1 1 2 Requirements 2.1 Material 2.2 Dimensions and Tolerances 2 Tables Dimensions for Square and Rectangular Parallel Keys Dimensions and Tolerances for Keyways vii Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled wh CONTENTS SQUARE AND RECTANGULAR KEYS AND KEYWAYS INTRODUCTORY NOTES 1.4 Tolerances 1.1 Scope Many of the tolerancesshown in Tables 1and2 arefrom 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 areexpressed as plus-plus or minus-minusdeviations from thebasicsize For further interpretation of these tolerances refer to ANSI B4.2 or I S 286 I.I This Standard covers requirements for square and rectangular parallel keys and keyways intended for both alignment of shaftsandhubs, and transmitting torquebetweenshafts and hubs 1.1.2Keys covered by this Standard have a relatively tightwidthtolerance The deviations are less than the basic size Keys with greater width tolerance and with deviations greater than thebasicsize are coveredby ASME B18.25.3M 1.5 Terminology For definitions of terms relating to fasteners or component features used in this Standard, refer to ANSI B18.12,Glossary of Terms of MechanicalFasteners 1.1.3 The inclusion of dimensionaldata in this Standard is not intended to imply that all sizes described are productionstockitems Consumers shouldconsult withsuppliers concerning lists of stockitems 1.6 Referenced Standards 1.2 Comparison With IS0 R773-1969 and 2491-1974 Referenced ASME standards may beobtained from The American Society of Mechanical Engineers, 22 Law Drive,Box2300,Fairfield, New Jersey 07007-2300 Referenced I S standards may be obtained from the AmericanNationalStandardsInstitute,11 West42nd Street, New York,NY10036-8002 ThisStandard is based on I S StandardsR7731969, Rectangular orSquare ParallelKeysandTheir Corresponding Keywaysand2491-1974,ThinParallel KeysandTheir CorrespondingKeyways(Dimensions inmillimeters).Productmanufactured to thisStandard will meetthe IS0 standards.Because of tighter width tolerances in this Standard, productsmanufactured to the I S standard may not meettherequirements of thisStandard ThisStandard differsfrom IS0 in that it: ( a ) does notrestrictthe comers of a key to be chamfered but allows eithera chamfer or aradius on thekey; (b) specifiesa key materialhardnessrather than a tensileproperty 1.7 Designation Keys conforming to this Standard shall be designated by the following data, preferably in the sequence shown: ( a ) ASMEdocument number; (b) productname; (c) nominalsize[width (b) xheight (h) x length]; (d) form; ( e ) hardness (if other than non-hardened) 1.3 Dimensions EXAMPLES: (1) ASMEB18.25.1M Square Key x x 15 form B Rectangular Key 10 x x 20 form C (2)ASMEB18.25.1M hardened Unless otherwisespecified, all dimensions in this Standardare in millimeters (mm) Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled w ASME B18.25.1M-1996 SQUARE AND RECTANGULAR KEYS AND KEYWAYS REQUIREMENTS 1.8 Preferred Lengths and Tolerances Preferred lengths and tolerances of square and rectangular keys are shownbelow Tolerances are JS16 To minimize problems due to lack of straightness, key length should be less than 10 timesthe key width Length +Tolerances 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, 180 200,220,250 280 320,360, 400 0.38 0.45 0.56 0.65 0.8 0.95 2.1Material Standard steelkeys shall have a hardness of 183 HV minimum.Hardened keys shall bealloysteel through hardened to a Vickers hardness of 390 to 510 HV When other materials and properties are required, these shall be as agreedupon by the supplier and customer 2.2 Dimensions and Tolerances 1.1 1.25 1.45 1.6 1.8 Dimensions and tolerances for square and rectangular keys are shown in Table Recommended dimensions and tolerances for keyways are shown in Table 2 Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled wh ASME B18.25.1M-1996 TABLE DIMENSIONS FOR SQUARE AND RECTANGULAR PARALLEL KEYS Width, b Basic Size h Tolerance h8 Basic Size II Chamfer or Radius, Thickness, Range of Lengths S Tolerance Sq h8; Rect h l l To From Sguare Keys -0.014 -0.014 -0.018 -0.018 0.16 0.25 Rectangular Keys -0.018 l I o -0.060 -0.075 -0.090 10 -0.022 -0.090 12 -0.075 12 -0.090 14 -0.075 16 -0.027 0.40 22 0.40 36 10 18 18 11 I I 36 [Note (1)l 45 [Note (I)] 56 [Note (1)l 0.40 70 [Note (1)l I 56 [Note (111 70 [Note (1)l 0.40 -I 0.60 110 [Note (111 28 0.60 90 [Note (1)l 140 [Note (1)1 160 [Note (111 16 0.25 18 0.25 -0.075 10 14 I 20 [Note (I)] 180 -0.090 [Note (111 -0.110 200 [Note (1)l (Table continues on next page) Max Min Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled w ASME 818.25.1M-1996 SQUARE AND RECTANGULAR KEYS AND KEYWAYS TABLE DIMENSIONS FOR SQUARE AND RECTANGULAR PARALLELKEYS (CONT'DI Tolerance Basic Size 22 25 28 28 I -0.033 II Basic Size l o ++- -0.039 12 220 [Note (1)1 63 260 [Note ( I ) ] 70 80 320 [Note ( I ) ] 90 360 [Note (1)1 100 400 [Note (1)1 -0.110 -0.075 -0.110 0.60 -0.090 -0.110 10 -0.090 18 0.80 -0.046 -0.054 -0.110 12 20 25 100 56 14 45 I -0.090 ~ 14 22 70 To Max Rectangular Keys (Cont'd) 40 63 Range of Lengths From Min 16 I 36 Tolerance Sq h8; Rect h l l 11 36 Chamfer or Radius, Thickness, h Width, b 0.130 1.oo 1.20 1.60 2.00 28 32 32 36 40 45 -0.160 2.50 50 NOTE: (1) See 1.8 for preferred maximum length of key Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled w SQUARE AND RECTANGULAR KEYS AND KEYWAYS ASME 818.25.1M-1996 VI 5 6 3x3 4x4 5x3 5x5 6x4 6x6 10 10 10x6 10x8 ax7 a a 2x2 ax5 Basic Sire Key size bnh t I T Fit Nor1mtal Fit -0.03t -0.03( 0.022L 0.036T o.oIaL 0.030T -0.001 0.01OL -0.025 0.029T N9 Shaft Width Hub I Close Fit 0.007L 0.051T 0.006L 0.042T 0.031T o.ooaL Fit Shaft and Hub H9 Fit Shaft I 0.096L 0.030L t0.03Z 0.058~+O.O~E 0.120L OT 0.040L - t0.03C “.;I Hu I Dl0 [Note (211 Free Fit t0.02E 0.039L +0.060 0.074L OT +0.020 0.020L i Kevwav 3.5 2.5 3.5 +0.2 0 +o +0.2 +0.2 0 +o +0.2 +o Tolerance 0.25 0.16 0.25 0.4 - - 0.16 - 0.08 Max Radius, r Min r (Table continues on next page) 3.3 2.8 3.3 2.8 1.a 2.8 2.8 1.4 1.8 2.5 1.a 1.4 1.a t2 Hub, Basic Size +o Tolerance 1.2 Basic Size tl Shaft, Da th Detail of Keyway and Key DIMENSIONS AND TOLERANCES FOR KEYWAYS Section X-X Tolerance [Note (111 and Resulting Fi TABLE I t I T I f Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled w (Table continues on next page) W A m A B D z U D x 23 v) Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled w Fit H9 F i t Hub Dl0 Fit Free Fit Basic Sire ance Toler- I 0.314L +0.260 0.139L 28 0.120L +0.120 31 90x450 90 100 25 17.4 19.5 15.4 tz +0.3 Tolerance Hub, Basic Size 12.4 20 -0.032 0.083L 0.266L +0.220 0.120L 12.4 +0.074 0.014L 20 OT +0.100 0.1OOL -0.106 0.037T 0.074T 0.106T -0.037 +0.3 22 14.4 P9 Shaft 80x40 Fit Close Fit Shaft and Hub -0.037 0.0975L +0.0435 +0.087 0.017L 0.1254T -0.0435 OT -0.1254 0.0435T Hub +0.037 JS9 0.054L 0.87T -0.087 0.046L Fit Normal Fit tl Shaft, Depth 80 63x320 -0.074 70x36 N9 Shaft Kevwav Tolerance [Note (111 and Resulting Fits [Note (211 Width DIMENSIONS AND TOLERANCES FOR KEYWAYS (CONT'D) NOTES: (1) Note that some of the tolerances are expressed as plus-plus See para 1.4 for more information (2) Resulting fits: L indicates a clearance between t h e key and keyway; T indicates an interference between the key and the keyway 100x50 56 63 56x32 70 Basic Size Key size bxh I TABLE & I Min Max Radius, r Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled wh Small Solid Rivets B18.1.1-1972(!41995) Large Rivets B18.1.2-1972(R1995) B18.1.3 M-l983(R1995) Metric Small Solid Rivets Square and Hex Bolts and Screws - Inch Series B18.2.1-1981(R1992) B18.2.2-1987(R1993) Square and Hex Nuts (Inch Series) Metric Hex Cap Screws 818.2.3.1M-1979(!41995) Metric Formed Hex Screws B18.2.3.2M-l979(R1995) Metric Heavy Hex Screws B18.2.3.3M-l979(R1995) Bl8.2.3.4M-l984(R1995) Metric Hex Flange Screws Metric Hex Bolts B18.2.3.5M-l979(R1995) Metric Heavy Hex Bolts B18.2.3.6M-1979(!?1995) Metric Heavy Hex Structural Bolts B18.2.3.7M-1979(!?1995) Metric Hex Lag Screws B18.2.3.8M-l98l(R1991) Bl8.2.3.9M-l984(R1995) Metric Heavy Hex Flange Screws Metric Hex Nuts, Style 818.2.4.1M-l979(R1995) 818.2.4.2M-l979(R1995) Metric Hex Nuts, Style Metric Slotted Hex Nuts Bl8.2.4.3M-l979(R1995) B18.4.4.4M-l982(R1993) Metric Hex Flange Nuts Metric Hex Jam Nuts B18.2.4.5M-l979(R1990) B18.2.4.6M-l979(R1990) Metric Heavy Hex Nuts Socket Cap, Shoulder and Set Screws- Inch Series B18.3-1986(R1995) Socket Head Cap Screws (Metric Series) B18.3.1M.l986(R1993) B18.3.2 M.l979(R1990) Metric Series Hexagon Keys and Bits B18.3.3 M.l986(R1993) Hexagon Socket Head Shoulder Screws (Metric Series) Hexagon Socket Button Head Cap Screws (Metric Series) B18.3.4 M.l986(R1993) Hexagon Socket Flat Countersunk Head Cap Screws (Metric Series) .B18.3.5 M.l986(R1993) B18.3.6 M.l986(R1993) Metric Series Socket Set Screws .B18 5.1990 Round Head Bolts (Inch Series) .B18.5.2.1 M.l981(R1995) Metric Round Head Short Square Neck Bolts Metric Round Head Square Neck Bolts B18.5.2.2 M.1982 B18.5.2.3 M.1990 Round Head Square Neck Bolts With Large Head (Metric Series) Wood Screws (Inch Series) B18.6.1-1981(R1991) Slotted Head Cap Screws, Square Head Set Screws, and Slotted Headless Set Screws 818.6.2-1972(R1993) Machine Screws and Machine Screw Nuts., B18.6.3-1972(R1983) Thread Forming and Thread Cutting Tapping Screws and Metallic Drive Screws (Inch Series) B18.6.4-1981(R1991) B18.6.5 M.l986(R1993) Metric Thread Forming and Thread Cutting Tapping Screws Metric Machine Screws .B18.6.7 M.l985(R1993) General Purpose Semi-Tubular Rivets, Full Tubular Rivets, Split Rivets and RivetCaps B18 7.1972(R1992) Metric General Purpose Semi-Tubular Rivets .B18.7.1 M.l984(R1992) 818.8.1-1994 Clevis Pins and Cotter Pins (Inch Series) Taper Pins, Dowel Pins, Straight Pins, Grooved Pins, and Spring Pins (Inch Series) B18.8.2-1995 Spring Pins - Coiled Type (Metric Series) B18.8.3M-1995 B18.8.4M-1994 Spring Pins - Slotted (Metric Series) Machine Dowel Pins Hardened Ground (Metric Series) B18.8.5M-7994 B18.8.6M-1995 Cotter Pins (Metric Series) Headless Clevis Pins (Metric Series) B18.8.7M-1994 Headed Clevis Pins (Metric Series) B18.8.8M-1994 PIOWBolts 618.9-1958(R1995) Track Boltsand Nuts B18.10-1982(R1992) Miniature Screws B18.11-1961(R1992) Glossary of Terms for MechanicalFasteners .B18.12.1962(R1991) Sems (Inch Series) B18.13-1987(R1993) Screw and Washer Assemblies B18.13.1M-1991 Screw and Washer Assemblies - Sems (Metric Series) B18.15-1985(R1995) Forged Eyebolts Mechanical and Performance Requirements for Prevailing-Torque Type Steel Metric Hex Nuts and Hex Flange Nuts .B18.16.1 M.l979(R1995) Torque-Tension Test Requirements for Prevailing-Torque Type B18.16.2 M.l979(R1995) Steel Metric Hex Nuts and Hex Flange Nuts - - Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled wh AMERICAN NATIONAL STANDARDS FOR BOLTS NUTS RIVETS SCREWS WASHERS AND SIMILAR FASTENERS 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 7-800-THE-ASME(1.800.843.2763) Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled wh Dimensional Requirements for Prevailing-Torque Type Steel Metric Hex Nuts and Hex Flange Nuts .B18.16.3 M.l982(R1993) Wing Nuts Thumb Screws and Wing Screws B18.17-1968(R1983) Inspection and Quality Assurance for General Purpose Fasteners B18.18.1M-I987(R1993) Inspection and Quality Assurance for High-Volume Machine Assembly Fasteners B18.18.2 M-1987U31993) Inspection and Quality Assurance for Special Purpose Fasteners 818.18.3 M.I987(R1993) Inspection and Quality Assurance for Fasteners for Highly Specialized Engineered Applications 818.18.4 M.l987(R1993) 818.21.1-1994 LockWashers(1nch Series) Lock Washers (Metric Series) 818.21.2M-1994 Metric Plain Washers B18.22M-l98l(R1990) B18.22.1-1965(R1990) Plainwashers Square and Rectangular Keys and Keyways 818.25.1M-1996 Woodruff Keysand Keyways B18.25.2M-1996 818.29.1-1993 Helical Coil Screw Thread Inserts (Inch Series) Copyrighted material licensed to Stanford University by Thomson Scientific (www.techstreet.com), downloaded on Oct-05-2010 by Stanford University User No further reproduction or distribution is permitted Uncontrolled when