ASME_B5.26-1950.pdf

.-:o.a.Reproduced By GlOBAl J:;ENGINEERING DOCUMENTS-With The Permission Of ASME-.:;u Under Royalty Agreement A M E R C A N STANDARD INVO.LUTE.-SERRATJONS-_jl.-.ASA 85.26-1950/one of q Series of Standards for;S.maif Tools and Machine.,.;uoc 621.824.4-45 Tool Elements on.1or.1/or:Ji.1 StanJa,.J Metal Cutting Tool Institute Society of Automotive Engineers American Gear Manufacturers Association National Machine Tool Builders Association The American Society of Mechanical Engineers Put/;jeJ tJ AMERICAN SOCIETY OF MECHANICAL ENGINEERS G;z 0 Ab:o.3 1.29 West 39th Street,New York 18,N.Y./2-:Copyright ASME International Provided by IHS under license with ASME Licensee=University of Alberta/5966844001,User=trert,rtyrtyrtyNot for Resale,03/07/2015 22:06:39 MSTNo reproduction or networking permitted without license from IHS-,-,-FOREWORD DURING the summer ot 1945,there were some discussions of the SAE Serrated Shaft Standard which disclosed some inconsistencies.It was also brought out that a great many serrations,as generated by bobbing especially,had an involute form even though they were considered straight.This fact forced a decision to proceed to develop a 45 deg Involute Serration Standard to replace the old SAE Standard,and a committee was appointed as a subcommittee of the Parts and Fittings Division to develop the new standard and review the old by adding desired information.In the new standard,even diametral pitches were adBpted,which are slightly coarser than the old SAE Standard.The range of teeth used presents diarpeters both smaller and larger than the old stand-ard,so that throughout there is much greater selection of sizes.The introduction of allowable errors and effective fits into the Involute Spline Standard has made necessary the same procedure for the Involute Serrations.These are now incorporated as Table 13,and in order to include effective fits the pin measurements are now given as maximum for the internal and minimum for the external.In order to calculate all fits,it is now necessary to have basic measurements between and over pins,and new tables have been included,and also new tables giving the maximum tooth space and the minimum tooth thickness.The scope of sizes given has also,at the request of NASr.,been increased for 40/80,48/96,64/128,80/160,and the rang-e of the 32/64 moved downward to agree with the coarser pitches.The text of the SAE standard was approved by Sectional Committee(135)on the Standardization of Small Tools and Machine Tool Elements,as the proposed American Standard for Involute Serrations on August 29,1949.Following approval of the sponsor organizatic:ms and the A:Ierican Standards Association,this proposal was designated as an American Stand on March 22,1950 .-;-.-.Any part of this standard may be quoted.Credit lines should rNli:Extracted from American Standard Involute Serrations(ASA 85.26-1950),with the permission!e eublisher,The American Society of Mechanical Engineers,29 IJest 39th Street,New York JS.Y.Copyright,1950,by THE AMERICAN SOCIETY OF MECHANICAL D;S Lithographed in U.S.A.Varityped by ASME Copyright ASME International Provided by IHS under license with ASME Licensee=University of Alberta/5966844001,User=trert,rtyrtyrtyNot for Resale,03/07/2015 22:06:39 MSTNo reproduction or networking permitted without license from IHS-,-,-Standardizati-on of Small Tools and.Machine Tool P.LHouser,Chairman Officers of Sectional Committee A.F.Murray,Vice-Chairman R.M.Norman,Secretary Personnel of Technical Committee No.13 on Standardization of Splines and Splined Shafts S.O.jomberg.Chairman Cons.Eng-linois Tool Works,Oticago,Ill.G.L.NcCain,secretary,Engrg Div.,-ler Corp.,Detroit,Mich.J.B.Aanhage,V.P.,Charge of Engrg,.Keariiey&TrecLer Corp.,Mil waukee,Wis.E.H.Babel,Northrop Aircraft,Inc.,Hawthome!-Calif.W.L.Barth,Exec.Secy.Engineering Standards,GenNal Motors Corp.,Detroit,Mich.A.S.Beam,Gear Div.,Yinco Corp.,Detroit,Mich.J.P.Breuer,Gear&Service En gr.,Machine&Small Tools Oiv.,Barber-Colman Co.,Rockford,Ill.Bureau of Ships,(liaison)(Code 350),U.S.NaY Department,Washington,D.C.G.Carvelli,Standards En gr.,Wright Aeronautical Corp.,Wood-Ridge,N.J.J.F.Cramer,Boeing Aircraft Co.,Seattle,Wash.J?.M.Dean,Aeronautics&Ordnance Systems Div.,General Electric Co.,Schenectady,N.Y.N.J:inkelstein,Engrg Dept.,Ford Motor Co.,Dearborn,Mich.I!H.Gotberg,ColoniBJ Broach Co.,Detroit,MJch-.;B:.P Graves,Dir.of Design,BroWD&Sharpe llfJ-Co.,Providence,R.I.it KetJDetb Hodge,Engrg Dept.,Pratt&Whitney Aircraft,Div.of United Aircraft Corp.,East Hartford,Conn.Harold mch,Jr.,Production Engr.,Ford Motor Co.,Engineering Laboratory,Dearborn,Mich.J,E.Lovely,V.P.&Ot.EngrJones&Lamson Machine Co.,Springfield,Vt.IL A.Marchant,Engrg.Dept.,Utrysler Corp.,Detroit,Mich.Harry Morton,Buick Motor Div.,General Motors.Corp.,FUnc,Mich.Harry Pelphrey,Michitan Tool Co.,Detroit,Mich.C.E.Plouff,Boeing Aircraft Co.,Seattle,Wash.:.Paul Pritchard,Transmission Engrg Dept.,Allison Div.,General Motors Corp.,Indianapolis,Ind.G.H.Sanbom.J.Ch.