DIN-58405-1-1972

üDC621.833:681:001.4DEUTSCHENORMENitefmSpurGearDrivesforFineMechanicsScope,Definitions,PrincipalDesignData,ClassificationDINI58105SheetIStirnradgetriebederFeinwerktechnik;Geltungsbereich,Begriffe,BestimmungsgröBen,EinteilungPhisStandardislargelybasedonthegeartoothsystemstandardsformechanicalengineeringDIB3960etc.,exceptwheredifferentprovisionsarenecessaryinordertomeetthespecialrequirementsoffinemechanics.Tofacilitateunderstanding,variouspartsofDIN3960etc.arerepeatedhere.PhereferencestotheotherSheetsofthisStandardrelatetotheNay1972issues.ContentsandsurveySheet1.Scope,definitions,principaldesigndata,classificationI.Introduction1.1.GeneralfundamentaltermsI.2.Symbolsanddenominations1.3.Definitions1.3.1.Gearfit1.3.2.Toppedspurgears1.4.Arrangementofaschemeofgearfits2.1.Basicrackprofileofteeth2.2.Modulem2.3.A&dendummodificationfactorx2.4.Helixangleßo2.5.Numberofteethz2.6.Pitchcirclediameterdo2.7.Facewidthb3.Definitionsandprincipaldesiwdata3.1.'pipcircle,tipcirclediameterdk3.1.1.Tipeasingk*m3.2.Positionofbasicrackprofilesinrelationtopitchcircle2.SCODûSheet2.Gearfitselection,tolerances,allowances1.Gearfitselection1.1.Directionsforselectingagearfit1.2.GeneralrequirementsSoragearfit2.TolerancesonRearblank2.1.Tolerancesondiameteroftipcircle2.1.1.Gearblanksfornon-toppedspurgears2.1.2.Gearblanksfortoppedspurgears2.2.Permissibleradialeccentricityof2.3.Peniisaibleaxialeccentricityofend(tipcylinder)tipcircle(tipcylinder)faces3.Tolerancesontipcirclediameteroftopmaspurmars3.1.Necessarytolerancingwithindirectmeasurementofbasetangentlength(tooththicknessmeasurement)3.2.Tolerancesarisingwithdirectmeas-urementofbasetangentlength(tooththicbessmeasurement)3.2.1.Addendummodification;addendum3.2.2.Undercut3.2.3.Avoidingundercutthroughaddendum3.2.4.Permissiblepairingswithundercutmodificationfactorxmodificationunmodifiedgears3.3.ContactratioE3.3.1.Profilecontactratio(durationofcontact)~p3.3.2.FacecontactratiotSp3.3.3.Totalcontactratioegee3.4.BasetangentlengthW3.5.DualconewidthR3.5.1.Dualconewidthofunmodifiedgears3.5.2.DualconewidthofVgears3.6.TorsionalbacklashSa3.6.1.Usingabsolutetoleranceaddition3.6.2.Usingstatisticaltoleranceaddition3.6.3.Conversionoftorsionalbacklashfrompmtoangularseconds4.Classification4.Tolerancesandallowancesonteeth4.1.AllowancesforbasetangentlengthAw4.2.Dualconewidthallowances4q4.3.TotalcompositeerrorFi4.4.Toothtotoothcompositeerrorfi4.5.Facealignmenterrorfp5.Tolerancesandallowancesforhousing5.1.CentredistanceallowancesA,5.2.Errorinaxialparallelismfp6.TolerancesforRearassemblies6.1.TolerancesforgearassembliesofGrade56.2.TolerancesforgearassembliesofGrade66.3.TolerancesforgearassembliesofGrade76.4.Tolerance8forgearassembliesofGrade86.5.TolerancesforgearassembliesofGrade96.6.TolerancesforgearassembliesofGradeIOContinuedonpages2to12leinverkaufderNormblötterdur&Beuih-VertriebGmbH,Berlin30undKölnDIB58405B1.Iengl.Preisgr.--``,``,`,``,``,`````,,,,,,,,`-`-`,,`,,`,`,,`---Page2DIN58405Sheet1Sheet3.Indicationsindrawings,examplesforcalculationI.IndicationsinthesDurueardrawing1.1.Dataforthegearblank1.2.Dataforgear-cutting1.2.1.ToolbasicrackprofileaccordingtoDIN504121.2.2.Numberofteethz1.2.3.Modulem1.2.4.Pitchcirclediameterdo1.2.5.Basicrackprofile1.2.6.Addendummodificationfactorx1.2.7.HelixangleBo1.2.8.Facealignment1.2.9.GearfitaccordingtoDIN58405Sheet21.2.13.DualconewidthN1.2.14.Centredistanceainthedual1.2.15.Numberofmatinggear1.2.16.Centredistanceinhousinga1.2.17.BasetangentlengthU2.Indicationsinthehousinndrawing2.1.Centredistancea2.2.GradeandtolerancezoneaccordingtoDIN58405Sheet2andcentredis-tanceallowance2.3.Permissibleerrorinaxialparallel-flankrolltesterwithmastergear-1.2.10.Permissibletotalerror1.2.11.Permissibletoothtotoothcom-ismfprangeFi3.IndicationsintheRearshaftdrawinqpositeerrorfierrorfß1.2.12.Permissiblefacealignment4.Individualerrors5.ExamplesforcalculationSheet4.Tables1.Basetannentlenuthsw'2.FactorfordetermininßcentredistancewithaddendummodificationaDDìied3.RadialsettingRoftoolforbasetanuentlengthdifferencesAWbetweentheoret-icaldimensionandactualdimensionSupplementarySheetI.CalculationproformaSupplementarySheet2.ExplanationsaccordingtoDIN58405TheExplanationswhichareincourseofpreparationcontaininformationwhichmustbetakenintoaccountifthescopeindicatedinSheetI,Section2isexceeded.DetailsarealsogivenoftheboundaryconditionswhichwereborneinmindduringthecompilingofthisStandard.AcorrespondingnoteisincludedattheappropriatepointsinthisStandard.TheExplanationsarenotnecessaryfortheapplicationofthisStandardwithinitsdefinedscope.1.IntroductionThefundamentaltermsspecifiedorusedinDIN7182Sheet1andSheet4(PreliminaryStandard)aretobeapplied,asappropriate,togears;furtherdefinitionsrequiredarelistedbelow.Thefollowingdefinitionsshouldbenotedinparticular:I:l:-b8oera_i_ounaameoqal_leloosnominaldimensionThenominaldimensionisthedimensionusedforindicatingthemagnitude,anditisthedimen-siontowhichtheallowancesofameasuredquantityarerelated.MeandimensionThemeandimensionisthedimensioncorrespondingtothearithmeticmeanofthemaximumandminimumdimensio