ASME_B94.20-1977.pdf

9009275 0024242 966 A M E R I C A N N A T I O N A L S T A N D A R D Specifications for Carbide Blanks for Twist Drills,Reamers,End Mills,and Random Rod ANSI B94.20-1977(REVISION OF 694.20-1968)SECRETARIA T 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 New York,N.Y.1 O 0 1 7 3 4 5 East 47th Street Copyright ASME International Provided by IHS under license with ASME Licensee=University of Alberta/5966844001,User=trert,rtyrtyrtyNot for Resale,03/07/2015 23:49:19 MSTNo reproduction or networking permitted without license from IHS-,-,-=9009275 0024243 8T2 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.Copyright O 1977 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A.Copyright ASME International Provided by IHS under license with ASME Licensee=University of Alberta/5966844001,User=trert,rtyrtyrtyNot for Resale,03/07/2015 23:49:19 MSTNo reproduction or networking permitted without license from IHS-,-,-9007275 0024244 739 F O R E W O R D The material contained in the following pages of this standard was originally developed by the Standards Committee of the Cemented Carbide Producers Association in cooperation with the Solid Carbide Tool in-stitute and the Metal Cutting Tool Institute.The dimensional listings together with tolerances and nomenclature were developed after a thorough in-vestigation of all factors involved in the area covered by this standard.Certain portions of this standard were based on material originally prepared by the Solid Carbide Tool Institute;others were developed after a cooperative exchange of ideas between the Metal Cutting Tool Institute and the Cemented Carbide Producers Association.On May 19,1959,the Cemented Carbide Producers Association submitted the final draft of the standard to ASA(now American National Standards Institute)for approval under the Existing Standards Method.The proposal was approved as an American Standard on May 24,1963,and designated B85.1-1963.The Cemented Carbide Producers Association requested that revision of the standard be undertaken by ANSI Standards Committee B94,Cutting Tools,Holders,Drivers and Bushings.Accordingly,this work was assigned to Technical Committee 1 on Carbide and Oxide Tools.The standard was revised in 1976.The Metal Cutting Tool Institute recommended substantial changes in male and female centers in blanks for reamers,driils and end mills.In addition,the MCTI recommended new standards for circuit board drill blanks,blanks for driils and countersinks,and blanks for fluted coun-tersinks.These changes were incorporated in this revision.This standard was approved as an American National Standard on July 19,1977.iii Copyright ASME International Provided by IHS under license with ASME Licensee=University of Alberta/5966844001,User=trert,rtyrtyrtyNot for Resale,03/07/2015 23:49:19 MSTNo reproduction or networking permitted without license from IHS-,-,-9009275 0024245 675 AMERICAN NATIONAL STANDARDS COMMITTEE B94 Standardization of Cutting Tools,Holders,Drivers and Bushings(The following is the Committee at the time of approval of this Standard)OFFICERS Harry McLinden,Chairman A.H.Mezey,ViCe-ChJfInan Kurt Weaely,Secretary AMERICAN GEAR MANUFACTURERS ASSOCIATION,THE P.M.Dean,Jr.,Mechanical Technology,Inc.,Latham,New York G.L.Scott,Alternate,American Gear Manufacturers Association,Washington,D.C.AMERICAN SOCIETY OF MECHANICAL ENGINEERS,THE M.E.Merchant,Dr.,Cincinnati Milacron,Inc.,Cincinnati,Ohio G.M.Monacelli,General Electric Company,Detroit,Michigan C.J.Oxford,Jr.,National Twist Drill&Tool Company,Rochester,Michigan G.F.Wilson,Alternate,Wheeling Illinois CEMENTED CARBIDE PRODUCERS ASSOCIATION J.A.Woodward,Teledyne Firth Sterling,Pittsburgh,Pennsylvania A.P.Wherry,Alternate,Cemented Carbide Producers Assn.,Cleveland,Ohio CUTTING TOOL MANUFACTURERS ASSOCIATION E.J.Czopor,Gorham Tool Industries,Inc.,Detroit,Michigan C.W.Jaho,Alternate,Cutting Tool Mfrs.Assn.,Birmingham,Michigan W.R.Wacker,General Services Administration,Washington,D.C.Richard Schrade,Clemson Brothers,Inc.,Middletown,New York C.M.Srockinger,Alternate,Hack and Band Saw Manufacturers Association of America,Cleveland,Ohio W.A.Wagner,Cleveland Twist Drill Company,Cleveland,Ohio.M.Byrne,Alternate,Metal Cutting Tool Institute,New York,New York GENERAL SERVICES ADMINISTRATION HACK AND BAND SAW MANUFACTURERS ASSOCIATON OF AMERICA METAL CUTTING TOOL INSTITUTE NATIONAL ASSOCIATION OF PUNCH MANUFACTURERS R.E.Smith,Dayton Progress Corporation,Dayton,Ohio J.R.fidgeon,National Bureau of Standards,Washington,D.C.G.F.Wilson,General Electric Company,Worthington,Ohio E.J.Loeffler,Alternate,National Machine Tool Builders Association,McLean,Virginia C.H.Lang,c/o Society of Carbide Engineers,Bridgeviile,Pennsylvania K.A.Lundell,The Producto Machine