1、AN AMERICAN N ATIO N AL STA NDA RD ASME B29.8-2010Revision of ASME B29.8-2002(R2008)Leaf Chains,Clevises,and SheavesREAFFIRMED 2017ASME B29.8-2010Revision of ASME B29.8-2002(R2008)Leaf Chains,Clevises,andSheavesAN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY 10016 USADate of Issuance:Marc
2、h 31,2011The next edition of this Standard is scheduled for publication in 2016.There will be no addendaissued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.Periodically certain actions of the ASME B29 Committee may be publis
3、hed as Code Cases.Code Cases and interpretations are published on the ASME Web site under the Committee Pages athttp:/cstools.asme.org as they are issued.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited a
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9、without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2011 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the B29
10、Committee.vi1Leaf Chains.12Clevises.23Sheaves.24Lubrication.35Additional Information.3Figures1Assembly Showing 4?6 Lacing.32Assembly Showing 4?6 Lacing and Parts.33Leaf Chain Assemblies and Proportions.44Clevis Types.65General Clevis Proportions.66General Sheave Proportions.7Tables1General Chain Dim
11、ensions,in.82General Chain Dimensions,mm.93Minimum Ultimate Tensile Strength.104Dimensions for Anchor Clevises Type B Leaf Chain,in.115Dimensions for Anchor Clevises Type B Leaf Chain,mm.13Nonmandatory AppendixASupplementary Information:Lubrication and Maintenance.15iiiFOREWORDFor many years,roller
12、chain manufacturers have furnished a substantial volume of chainsconsisting of link plates assembled on pins without the use of bushings and rollers.These chainsprovide relatively high strength per unit of weight and have found wide usage where sprocketsare not required and high-speed power transmis
13、sion characteristics are not needed.Previously,variationin linkplate thickness,link platecontour,diameterof pins,and themethodof lacing limited its interchangeability and restricted its use.For these reasons the Associationof Roller and Silent Chain Manufacturers appointed a task subcommittee on Sep
14、tember 21,1951to develop this Standard.The scope of the resultant Standard covers the lacing,pin diameter,diameter of link plateholes,link plate contour and thickness,chain widths,and minimum ultimate tensile strengths.The Standard also recommends clevis and sheave design.Supplementary information t
15、o guideusers in the application of these chains appeared in the 1958 edition and was deleted 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 leaf chain designs.Ty
16、pe A,the lighter series,was characterized by even or balanced lacing,while Type B,the heavierseries,was shown only with uneven or unbalanced lacing of chain links.During the decade preceding 1975,it became increasingly apparent that the use of Type A leafchain was declining and that it was being used primarily for replacement.Most new designapplications used the heavier Type B design either with the standard uneven lacing or with evenlacing,which was shown as standard only for Type A leaf chain.
