文档介绍：NationalStandardofthePeople’sRepublicofChinaStraightCylindricalInvoluteSplines–Modules,BasicRackProfiles,andTolerancesGB/–-83ThisstandardisidenticaltoPartI“Generalities”,ISO4156–1981“StraightCylindricalInvoluteSplines–MetricModules–SideFit–Generalities,Dimensions,andInspection”.SubjectContentsandApplicationScopeThisstandardspecifiesthemoduleseries,basicrackprofiles,tolerances,ºº(~10mm)andsidefitat45º(~).NormativeReferenceGB1800 Toleranceandfitting–generalities-standardtolerancesandbasicdeviationsGB10095 AccuracyofinvolutecylindricalgearsGB/ Straightcylindricalinvolutesplines-InspectionmethodsTerms,Symbols,andDefinitionsTheterms,symbols,anddefinitionsadoptedinthisstandardareshowninTable1andFigure1(30ºpressureangleflatrootishereafterreferredtoas30ºflatroot,30ºpressureanglefilletrootishereafterreferredtoas30ºfilletroot,ººfilletroot,and45ºpressureanglefilletrootishereafterreferredtoas45ºfilletroot).Table1 Terms,Symbols,(Continued),onwhichthepressureangl