USASTANDARDGEARSHAPER,CUTTERSUSASB94.21-19683p0,,0,TheAmericanSocietyofMechanicalEngineersTHEAMERICANSOCIETYOFMECHANICALENGINEERSUnitedEngineeringCenter345East47thStreetNewYork,N.Y.10017CopyrightedmateriallicensedtoStanfordUniversitybyThomsonScientific(www.techstreet.com),downloadedonOct-05-2010byStanfordUniversityUser.Nofurtherreproductionordistributionispermitted.UncontrolledwREAFFIRMED2003FORCURRENTCOMMITTEEPERSONNELPLEASEE-MAILCS@asme.orgUSASTANDARDThisUSAStandardisoneofnearly3000standardsapprovedasAmericanStandardsbytheAmericanStandardsAssociation.OnAugust24,1966,theASAwasreconstitutedastheUnitedStatesofAmericaStandardsInstitute.StandardsapprovedasAmericanStandardsarenowdesignatedUSAStandards.Thereisnochangeintheirindexindentifi-cationortechnicalcontent.Anypartofthisstandardmaybequoted.Creditlinesshouldread:“ExtractedfromUSAStandardGearShaperCutters(USASB94.21-1968)withthepermissionofthepublisher,TheAmericanSocietyofMechanicalEngineers,UnitedEngineeringCenter,345East47thStreet,NewYork,NewYork10017.”THEAMERICANSOCIETYOFMECHANICALENGINEERSCopyright,@1969byPrintedinU.S.A.CopyrightedmateriallicensedtoStanfordUniversitybyThomsonScientific(www.techstreet.com),downloadedonOct-05-2010byStanfordUniversityUser.Nofurtherreproductionordistributionispermitted.UncontrolledwFOREWORDInresponsetorequestsfrombothusersandproducersaprojectwasinitiatedinDecemberof1961toestablishstandardsforgearcuttingtools.USAStandardsCommitteeB5approvedthisprojectattheirannualmeetingin1961andcreatedtechnicalcommitteeTC-14topreparesuchstandards.In1962theUSAStandardsCommitteeB5wasdividedandtechnicalcommit-teesidentifiedwiththegeneralareaof“metalcutting”weretransferredtoanewUSAStandardsCommitteeB94.ThefirstmeetingofTC-14,reportingtoUSAStandardsCommitteeB94,washeldinDecember1962.Itwasatthistimedecidedtodividethegeneralsubjectintothreeareas;i.e.,hobs,gearshapercuttersandshavingcutters.TheinitialactivitywastoprepareaproposalforaUSAStandardonhobs,usingtheindustrystandards(MCTI)asthebasisforconside...
