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G■StructureandFeaturesIKOCombinedTypeNeedleRollerBearingsarecom-binationsofaradialbearingandathrustbearing.Cagedneedlerollerbearingsareusedasradialbear-ingsandthrustballbearingsorthrustrollerbearingsareusedasthrustbearings.Theyarecompactandveryeconomical,andcanbesubjectedtoradialloadsandaxialloadssimultaneously.Theyarewidelyusedmachinery,andindustrialmachinery.formachinetextiletools,■TypesThetypesofCombinedTypeNeedleRollerBearingsshowninTable1areavailable.Table1.1TypeofbearingType──WithdustcoverCombinedwiththrustballbearingWithoutinnerringWithinnerring(1)CombinedwiththrustrollerbearingWithoutinnerringring(1)WithinnerNAXNAX…ZNAXINAXI…ZNBXNBX…ZNBXINBXI…ZTable1.2TypeofbearingTypeCombinedwithangularCombinedwiththree-pointcontactballbearingcontactballbearingModelcodeNATANATBNote(1)FortheCombinedTypeNeedleRollerBearingswithinnerrings,theneedlerollerbearingsandinnerringswillbedeliveredseparately.PleasecontactIKOifinneedofdeliveryasanintegratedproduct.NeedleRollerBearingswithThrustBallBearingislabyrinthwiththereforeeffectivethisseries,needlerollerbearingsarecombinedInwiththrustballbearingstoreceivethrustloads.Inbearingswithadustcover,thedustcoverisformedfromathinsteelplateandfixedtoagroovecutontheoutercylindricalsurfaceoftheouterringcollar.Thethethrustracewayring,coverformsaandleakageofgreaseandpenetrationofdustanddirt.Inthecaseofbearingswithoutaninnerring,thetoler-ancesofrollersetborediameterFwareshowninTable14onpageA33.Therefore,therequiredradialinternalclearancescanbeselectedbycombiningthebearingswithshaftsthathavebeenheat-treatedandfinishedbygrindingasshowninTable23onpageA42andTable26onpageA44.inpreventingStructuresofCombinedTypeNeedleRollerBearingsBearingringforthrustbearingOuterringDustcoverThrustballbearingInnerringRadialneedlerollerbearingBearingringforthrustbearingRadialneedlerollerbearingOuterringInnerringOuterringInnerringOuterringInnerring(A)ThrustrollerbearingNeedlerollercageBallcage(Angularcontacttype)NeedlerollercageInnerring(B)Ballcage(3-pointcontacttype)G2
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