>> P.258
F3■TypesInIKOThrustBearings,thetypesshowninTable1areavailable.TheidentificationnumberofThrustBearingsconsistsofamodelcode,dimensionsandaclassificationsym-bol.Someexamplesareshownbelow.■IdentificationNumberThrustNeedleRollerBearingsThesebearingsconsistofacagemadefromasteelplate,whichispreciselypressformedandsurface-hardened,andneedlerollerswithadiametervariationwithin2μm.Theyhavearigidstructureandahighlubricant-retainingcapacity.Astheyhavethelowestsectionalheightcomparedwithotherthrustbearings,theycanbeusedinsteadofconventionalthrustwashersandcanwithstandhigh-speedrotationswithalowcoefficientoffriction.Speciallydesignedthininnerrings(WS)andouterrings(GS),andespeciallythin(1mmthick)thrustwashers(AS),areavailableforuseinvariousapplica-tions.Thesebearingsaregenerallyusedbyutilizingtheirinnersurfaceastheguidesurface.ThrustRollerBearingsInthisseries,thecagedcylindricalrollersAZKandthecompletebearingsAZinwhichAZKarecombinedwithaninnerring(WS)andanouterring(GS)areavailable.Thecagehasaspecialprecisestructurewhichishighlyrigid,andcylindricalrollersareoutwardlyarrangedandguidedbythecagewithexactprecisiontoenablethemtowithstandheavyloadsevenathighrotationalspeeds.OwingtothehighaccuracyofthebearingheightT,theyaresuitableforuseinmachinetools,ultra-highpressurepumps,etc.Thesebearingsaregenerallyusedbyutilizingtheirinnersurfaceastheguidesurface.Table1.1TypeofbearingTypeModelcodeNTBAZKAZThrustrollerbearingsThrustneedlerollerbearingsWithoutnneranduterringsWithinnerandouterringsTable1.2TypeofbearingringTypeModelcodeWSGSASOuterringThrustwasherInnerringModelcodeDimensionsNTB25Typeofbearing42Examplesofidenti(cid:16)cationnumberExample1(IncaseofNTBorAS)Example2(IncaseofAZorAZK)ModelcodeDimensionsAZ2511Typeofbearing42P5ClassificationsymbolBearingheight(11mm)Outsidediameter(42mm)Borediameter(25mm)Accuracyclass(1)(Class5)Example3(IncaseofWSorGS)ModelcodeDimensionsWS2542P5Accuracyclass(Class5)Borediameter(25mm)Outsidediameter(42mm)TypeofbearingringBorediameter(25mm)Outsidediameter(42mm)ClassificationsymbolNote(1)NotapplicabletothemodelAZK.
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