1、A M E R I C A N N A T I O N A L S T A N D A R D General Purpose Metric Tapered and Reduced Cross Section Retaining Rings TYPE 3DM1-HEAVY DUTY EXTERNAL RINGS TYPE 3EM1-REINFORCED E RINGS TYPE 3FM1-C TYPE RINGS ANSI B27.8M-1978 REAFFIRMED 1999 FOR CURRENT COMMITTEE PERSONNEL PLEASE SEE ASME MANUAL AS-
2、I 1 SECRETARIAT SOCIETY OF AUTOMOTIVE ENGINEERS THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS PUBLISHED BY T H E A M E R I C A N S O C I E T Y O F M E C H A N I C A L E N G I N E E R S United Engineering Center 345 East 47th Street New York,N.Y.1001 7 Copyrighted material licensed to Stanford Univers
3、ity 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:March 15,1979 No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,withou
4、t the prior written permission of the publisher.Copyright 1979 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A.Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproducti
5、on or distribution is permitted.Uncontrolled when printed.FOREWORD American National Standards Committee B27 for the standardization of plain and lock washers was organized in March 1926,as Sectional Committee B27 under the aegis of the American Standards Associa-tion(later the United States of Amer
6、ica Standards Institute and,as of October 6,1969,the American National Standards Institute,Inc.),with the Society of Automotive Engineers and The American Society of Mechanical Engineers as joint secretariats.In 1950,this Committee had been designated responsibility for standardization of washers an
7、d machine rings.At a meeting of ANSI B27 Standards Committee held on February 4,1971 it was recommended to the secretariats(ASME and SAE)that subcommittee 1,2 and 4 on washers be merged into ANSI B18 Stan-dards Committee and that Subcommittee 3 on retaining rings become a separate Standards Committe
8、e retaining the B27 designation.This change was subsequently approved by ANSI.Formation of Subcommittee 1 on tapered and reduced section retaining rings was authorized by Stan-dards Committee B27 at its meeting on October 15,1974.At this meeting,it was decided that no further effort should be expend
9、ed on inch dimensional products and Subcommittee I was assigned the respon-sibility of preparing American metric standards for tapered and reduced section retaining rings.This Standard was approved as an American National Standard on November 28.1978.111.Copyrighted material licensed to Stanford Uni
10、versity by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.AMERICAN NATIONAL STANDARDS COMMITTEE B27 Standardization of Retaining Rings,Retaining Clips and Similar Devices)(The following is the
11、roster of the Committee at the time of approval of this Standard)OFFICERS J.B.Levy,Chairman R.L.Berkbigler,Vice-Chairman Kurt Wessely,Secretary COMMITTEE PERSONNEL AMERICAN SOCIETY OF MECHANICAL ENGINEERS,THE J.8.Levy,General Electric Company,Schenectady,New York E.R.Friesth,alternate,Deere&Company,
12、Moline,Illinois ASSOCIATION OF AMERICAN RAILROADS J.H.Bean,Association of American Railroads,Chicago,Illinois FARM&INDUSTRIAL EQUIPMENT INSTITUTE A.G.Nauta,International Harvester Company,Hinsdale,Illinois NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION F.V.Kupchak,Westinghouse Electric Corporation,Pi
13、ttsburgh,Pennsylvania J.8.Levy,General Electric Corporation,Schenectady,New York R.L.Mancini,alternate,National Electrical Manufacturers Association,New York,New York SOCIETY OF AUTOMOTIVE ENGINEERS R.L Berkbigler,Ramsey Corporation,St.Louis,Missouri J.Long,General Motors Technical Center,Warren,Mic
14、higan SPRING MANUFACTURERS ASSOCIATION,INC.YI!L.Abrams,Precision Spring Corporation,Detroit,Michigan U.S.DEPARTMENT OF THE ARMY R.C.Englemann,Liaison,Rock Island Arsenal,Rock Island,Illinois 0.M.Kelley,alternate,Rock Island Arsenal,Rock Island,Illinois U.S.DEPARTMENT OF THE NAVY J.R.Ruff,Department
15、of the Navy,Naval Ship Systems Command,Washington,D.C.INDIVIDUAL COMPANIES 8.G.Allen,Pitney Bowes,Stamford,Connecticut Joseph Altman,Waldes Kohinoor,Incorporated,Long Island City,New York P.W.Dulk,The Singer Company,Elizabeth,New Jersey John Hiddlesfone,Anderton Darby,Incorporated,Clifton,New Jersey
16、 Daniel Frailly,Eaton Corporation,Massillon,Ohio P.M.Gladstone,The National Lock Washer Company,North Branch,New Jersey H.Greenhill,Smalley Steel Ring Company,Wheeling,Illinois G.A.Moos,Gordon Moos Associates Corporation,Washington,D.C.W.L.Scott,Massey-Ferguson Ltd.,Toronto,Canada Roberr Slass,Rotor Clip Company,Incorporated,Somerset,New Jersey V.A.Srabile,Industrial Retaining Ring Company,Irvington,New Jersey INDIVIDUAL MEMBER E.D.Cowlin,Canton,Ohio V Copyrighted material licensed to Stanford U