1、Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.AN AMERICAN NA TIONALST ANDARDLEAF CHAINS,CLEVISES,ANDSHEAVESASME B29.8-2002(Revision of A
2、SME B29.8M-1993)Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:August 1,2002This Standard will be revised when the Socie
3、ty approves the issuance ofa new edition.There will be no addenda or written interpretations of therequirements 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
4、meeting the criteria forAmerican National Standards.The Standards Committee that approved the code or standardwas balanced to assure that individuals from competent and concerned interests have had anopportunity to participate.The proposed code or standard was made available for public reviewand com
5、ment that provides an opportunity for 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 ri
6、ghts asserted inconnection withany itemsmentioned inthis document,and doesnot undertaketo insureanyoneutilizing a standard against liability for infringement of any applicable letters patent,nor assumeany such liability.Users of a code or standard are expressly advised that determination of thevalid
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9、 the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2002 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll Rights ReservedPrinted in U.S.A.Copyrighted material licensed to Stanford University by Thomson Scientif
10、ic(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.CONTENTSForeword.ivStandards Committee Roster.viCorrespondence With the B29 Committee.vii1Leaf Chains.12Clevises.23Sheaves.144Lubrication.145Additional Informatio
11、n.14Figures1Assembly Showing 3?4 Lacing.12Assembly Showing 4?6 Lacing and Parts.23Leaf Chain Assemblies and Proportions.34Clevis Types.85General Clevis Proportions.96General Sheave Proportions.14Tables1AGeneral Chain Dimensions,in.51BGeneral Chain Dimensions,mm.62Minimum Ultimate Tensile Strength.73
12、ADimensions for Anchor Clevises Type B Leaf Chain,in.103BDimensions for Anchor Clevises Type B Leaf Chain,mm.12Nonmandatory AppendixASupplementary Information:Lubrication and Maintenance.15iiiCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by St
13、anford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.FOREWORDFor many years,roller chain manufacturers have furnished a substantial volume of chainsconsisting of link plates assembled on pins without the use of bushings and rollers.Thesechains provide
14、 relatively high strength per unit of weight and have found wide usage wheresprockets are not required and high-speed power transmission characteristics are not needed.Previously,variation in link plate thickness,link plate contour,diameter of pins,and themethod of lacing limited its interchangeabil
15、ity and restricted its use.For these reasons theAssociation of Roller and Silent Chain Manufacturers appointed a task subcommittee onSeptember 21,1951 to develop this Standard.The scope of the resultant Standard covers the lacing,pin diameter,diameter of linkplate holes,link plate contour and thickn
16、ess,chain widths,and minimum ultimate tensilestrengths.The Standard also recommends clevis and sheave design.Supplementary informationto guide users in the application of these chains appeared in the 1958 edition and wasdeleted in 1960.The 1971 reaffirmation was approved by the American National Standards Institute onSeptember 10,1971.Prior to 1975,all B29.8 leaf chain standards included both Type A and Type B leafchain designs.Type A,the lighter series,was characterized by even or balanced laci
