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英文原文BASICDYNAMICLOADRATINGANDLIFELIFEROLLINGBEARINGSWILLSUFFERDAMAGEDUETOVARIOUSCAUSESDURINGSERVICEDAMAGESUCHASABNORMALWEAR,SEIZURE,ANDCRACKSISCAUSEDBYIMPROPERUSE,INCLUDINGINCORRECTMOUNTING,LACKOFOIL,DUSTINTRUSIONANDSOON,ANDCANBEAVOIDEDBYREMEDYINGTHESECAUSESHOWEVER,BEARINGSWILLEVENTUALLYBEDAMAGEDDUETOFATIGUEFLAKINGEVENIFUSEDPROPERLYWHENABEARINGROTATESUNDERLOAD,THERACEWAYSANDTHEROLLINGELEMENTSARESUBJECTEDTOREPEATEDSTRESSESCONCENTRATEDONTHEPARTCLOSETOTHESURFACEFATIGUE,THEREFORE,OCCURSINTHESURFACELAYER,PRODUCINGDAMAGEINTHEFORMOFSCALINGTHISISCALLEDFLAKINGSPALLINGWHENTHISOCCURS,THEBEARINGCANNOLONGERBEUSEDBEARINGLIFEBEARINGLIFEISDEFINEDASTHETOTALNUMBEROFREVOLUTIONSORTOTALSERVICEHOURSATACONSTANTROTATIONALSPEEDBEFOREASIGNOFTHEFIRSTFLAKINGAPPEARSONTHEROLLINGSURFACEOFRACEWAYORROLLINGELEMENTSHOWEVER,EVENWHENBEARINGSOFTHESAMESIZE,STRUCTURE,MATERIALANDHEATTREATMENTARESUBJECTEDTOTHESAMECONDITIONS,THEBEARINGLIVESWILLSHOWVARIATIONTHISRESULTSFROMTHESTATISTICALNATUREOFTHEFATIGUEPHENOMENONINSELECTINGABEARING,ITISINCORRECTTOTAKEANAVERAGELIFEFORALLBEARINGSASTHEDESIGNSTANDARDITISMOREPRACTICALTOCONSIDERABEARINGLIFETHATISRELIABLEFORTHEGREATERPROPORTIONOFBEARINGSUSEDTHEREFORE,THEBASICRATINGLIFEDEFINEDINTHEFOLLOWINGISUSEDBASICRATINGLIFETHEBASICRATINGLIFEISDEFINEDASTHETOTALNUMBEROFREVOLUTIONSTHAT90OFAGROUPOFIDENTICALBEARINGSCANBEOPERATEDINDIVIDUALLYUNDERTHESAMECONDITIONSFREEFROMANYMATERIALDAMAGECAUSEDBYROLLINGFATIGUEFORROTATIONATACONSTANTROTATIONALSPEED,THEBASICRATINGLIFECANBEREPRESENTEDBYTHETOTALSERVICEHOURSBASICDYNAMICLOADRATINGTHEBASICDYNAMICLOADRATINGISDEFINEDASTHECONSTANTRADIALLOADINTHECASEOFRADIALBEARINGSORTHECONSTANTAXIALLOADACTINGALONGTHEBEARINGCENTRALAXISINTHECASEOFTHRUSTBEARINGSTHATALLOWSABASICRATINGLIFEOF1,000,000REVOLUTIONSIKOCAMFOLLOWERSAREBEARINGSWITHASTUDINCORPORATINGNEEDLEROLLERSINATHICKWALLEDOUTERRINGTHESEBEARINGSAREDESIGNEDFOROUTERRINGROTATION,ANDHAVESUPERIORROTATIONALPERFORMANCEWITHASMALLCOEFFICIENTOFFRICTIONANDHIGHLOADCAPACITYASSTUDSALREADYHAVETHREADSORSTEPS,THEYAREEASYTOMOUNTCAMFOLLOWERSAREFOLLOWERBEARINGSFORCAMMECHANISMSANDLINEARMOTIONSANDHAVEHIGHRIGIDITYANDHIGHACCURACYTHEYARE,THEREFORE,USEDWIDELYFORMACHINETOOLS,INDUSTRIALROBOTS,ELECTRONICDEVICES,ANDOAEQUIPMENTSTAINLESSSTEELMADECAMFOLLOWERSARESUPERIORINCORROSIONRESISTANCEANDSUITABLEFORAPPLICATIONSINENVIRONMENTSWHEREOILCANNOTBEUSEDORWATERSPLASHED,ANDINCLEANROOMSTYPES1、STANDARDTYPECAMFOLLOWERSTHESEARETHEBASICTYPEBEARINGSINIKOCAMFOLLOWERSERIESMODELSWITHSTUDDIAMETERSRANGINGFROM3TO30MMAREPREPARED,ANDARESUITABLEFORAWIDERANGEOFAPPLICATIONS2、SOLIDECCENTRICSTUDTYPECAMFOLLOWERSTHESTUDOFTHESEBEARINGSISECCENTRICTOTHECENTERAXISOFTHEOUTERRINGTHUS,THEPOSITIONOFTHEOUTERRINGINTHERADIALDIRECTIONINRELATIONTOTHEMATINGTRACKSURFACECANEASILYBEADJUSTEDBYTURNINGTHESTUD,ANDTHELOADDISTRIBUTIONONANUMBEROFCAMFOLLOWEROUTERRINGSUSEDONTHESAMETRACKSURFACECANBEMADEUNIFORMTHESEAREECCENTRICCAMFOLLOWERSWITHAONEPIECESTUDTHATCANBEMOUNTEDINTHESAMEMOUNTINGHOLESASTHOSEFORSTANDARDTYPECAMFOLLOWERSECCENTRICITYIS025MM~06MM3、ECCENTRICTYPECAMFOLLOWERSINTHESEBEARINGS,ANECCENTRICCOLLARISASSEMBLEDWITHTHECAMFOLLOWERSTUD,ENABLINGTHEOUTERRINGTOBEPOSITIONEDEASILYINTHERADIALDIRECTIONAGAINSTTHEMATINGTRACKSURFACEECCENTRICITYIS04~15MM4、THRUSTDISKTYPECAMFOLLOWERSTHESEBEARINGSHAVESPECIALRESINTHRUSTDISKWASHERSSUPERIORINWEARANDHEATRESISTANCEBETWEENTHESLIDINGSURFACESOFOUTERRINGSHOULDERS,STUDHEADANDSIDEPLATETHESEDISKWASHERSREDUCEFRICTIONANDWEARDUETOAXIALLOADSCAUSEDBYMISALIGNMENT,ETC5、CENTRALIZEDLUBRICATIONTYPECAMFOLLOWERSTHESEBEARINGSHAVEONEORTWOPIPETHREADEDHOLESINTHESTUDTHUS,THISSERIESISSUITABLEWHENCENTRALIZEDLUBRICATIONISREQUIRED6、EASYMOUNTINGTYPECAMFOLLOWERSTHESEBEARINGSHAVEASTEPPEDTAPEREDPORTIONONTHESTUDWHENMOUNTINGTHECAMFOLLOWER,ITISEASYTOFIXITSLOCATIONBYTIGHTENINGASETSCREWTOTHESTEPPEDPORTIONTHUS,THISTYPEISSUITABLEWHENALARGENUMBEROFCAMFOLLOWERSAREUSEDINAMACHINESUCHASAPALLETCHANGER7、CLUBECAMFOLLOWERTHESEBEARINGSARELUBRICATEDWITHANEWLYDEVELOPEDTHERMOSETTINGSOLIDTYPELUBRICANTWHICHFILLSTHEINNERSPACEOFTHEBEARINGTHISLUBRICANTPROVIDESLONGTERMMAINTENANCEFREE8、HEAVYDUTYTYPECAMFOLLOWERSTHESEBEARINGSAREFULLCOMPLEMENTTYPEBEARINGSINCORPORATINGDOUBLEROWSOFFULLCOMPLEMENTCYLINDRICALROLLERSINTHEOUTERRING,ANDCANWITHSTANDLARGERADIALLOADSANDSOMEAXIALLOADS9、MINIATURETYPECAMFOLLOWERSTHESEARECOMPACTLYDESIGNEDBEARINGS,INCORPORATINGVERYTHINNEEDLEROLLERSINANOUTERRINGWITHASMALLOUTSIDEDIAMETERTHEYAREUSEDINELECTRONICDEVICES,OAEQUIPMENT,SMALLINDEXDEVICES,ETC10、INCHSERIESCAMFOLLOWERSTWOTYPES,CRANDCRH,AREAVAILABLEINTHEINCHSERIESCAMFOLLOWERSBLACKOXIDEFILMTREATMENTISMADEONCRHMODELSMAXIMUMALLOWABLESTATICLOADTHEAPPLICABLELOADONCAMFOLLOWERSIS,INSOMECASES,LIMITEDBYTHEBENDINGSTRENGTHANDSHEARSTRENGTHOFTHESTUDANDTHESTRENGTHOFTHEOUTERRINGINSTEADOFTHELOADRATINGOFTHENEEDLEROLLERBEARINGTHEREFORE,THEMAXIMUMALLOWABLESTATICLOADTHATISLMITEDBYTHESESTRENGTHSISSPECIFIEDTRACKCAPACITYTRACKCAPACITYISDEFINEDASALOADWHICHCANBECONTINUOUSLYAPPLIEDONACAMFOLLOWERPLACEDONASTEELTRACKSURFACEWITHOUTCAUSINGANYDEFORMATIONORINDENTATIONONTHETRACKSURFACEWHENTHEOUTERRINGOFTHECAMFOLLOWERMAKESCONTACTWITHTHEMATINGTRACKSURFACEPLANEIFLUBRICATIONBETWEENTHEOUTERRINGANDTHEMATINGTRACKSURFACEISINSUFFICIENT,SEIZUREAND/ORWEARMAYOCCURDEPENDINGONTHEAPPLICATIONTHEREFORE,ATTENTIONMUSTBEPAIDTOLUBRICATIONANDSURFACEROUGHNESSOFTHEMATINGTRACKESPECIALLYFORHIGHSPEEDROTATIONSSUCHASCAMMECHANISMSOPERATINGTEMPERATURERANGETHEOPERATINGTEMPERATURERANGEFORCAMFOLLOWERSIS20゜C~120゜CHOWEVER,THEMAXIMUMALLOWABLETEMPERATUREFORTHEFOLLOWINGTYPESISDIFFERENTTHEMAXIMUMALLOWABLETEMPERATUREFORTHEMETRICCFSERIESWITHASTUDDIAMETERD1OF4MMORLESSANDCFS2IS110゜C,AND100゜CWHENTHEYARECONTINUOUSLYOPERATEDTHEMAXIMUMALLOWABLETEMPERATUREFORTHESEALEDTYPEWITHASTUDDIAMETERD1OF5MMORLESSIS80゜CMOUNTING1、MAKETHECENTERAXISOFTHEMOUNTINGHOLEPERPENDICULARTOTHEMOVINGDIRECTIONOFTHECAMFOLLOWERANDMATCHTHESIDESHOULDERACCURATELYWITHTHESEATINGSURFACEINDICATEDBYDIMENSIONFINTHETABLEOFDIMENSIONSTHEN,FIXTHECAMFOLLOWERWITHTHENUTDONOTHITTHEFLANGEHEADOFTHECAMFOLLOWERDIRECTLYWITHAHAMMER,ETCTHISMAYLEADTOABEARINGFAILURESUCHASIRREGULARROTATIONORCRACKING2、THEIKOMARKONTHEFLANGEHEADOFTHESTUDINDICATESTHEPOSITIONOFTHEOILHOLEONTHERACEWAYAVOIDLOCATINGTHEOILHOLEWITHINTHELOADINGZONETHISMAYLEADTOASHORTBEARINGLIFETHEHOLELOCATEDINTHEMIDDLEPARTOFTHESTUDPERPENDICULARTOTHESTUDCENTERAXISISUSEDFORGREASINGORLOCKING3、WHENTIGHTENINGTHENUT,THETIGHTENINGTORQUESHOULDNOTEXCEEDTHEVALUESSHOWNINTHETABLEOFDIMENSIONSIFTHETIGHTENINGTORQUEISTOOLARGE,ITISPOSSIBLETHATTHETHREADEDPORTIONOFTHESTUDWILLBEBROKENWHENTHEREISAPOSSIBILITYOFLOOSENING,ASPECIALNUTSUCHASALOCKNUT,SPRINGWASHER,ORSELFLOCKINGNUTSHOULDBEUSED4、INTHECASEOFSOLIDECCENTRICSTUDTYPECAMFOLLOWERSANDECCENTRICTYPECAMFOLLOWERS,THEOUTERRINGPOSITIONCANBEADJUSTEDAPPROPRIATELYBYTURNINGTHESTUDWITHASCREWDRIVERORHEXAGONBARWRENCHUSINGTHESCREWDRIVERSLOTORHEXAGONHOLEOFTHESTUDHEADTHESTUDISFIXEDWITHANUTANDASPRINGWASHER,ETCTHETIGHTENINGTORQUESHOULDNOTEXCEEDTHEVALUESOFMAXIMUMTIGHTENINGTORQUESHOWNINTHETABLEOFDIMENSIONSWHENSHOCKLOADSAREAPPLIEDANDTHEADJUSTEDECCENTRICITYHASTOBEENSURED,ITISRECOMMENDEDTOMAKEHOLESINTHEHOUSING,STUDANDECCENTRICCOLLAR,ANDFIXTHESTUDWITHADOWELPINASSHOWNINFOLLOWINGHOWEVER,WHENTHESTUDDIAMETERISLESSTHAN8MMECCENTRICCOLLARDIAMETER11MM,ITISDIFFICULTTOMAKEAHOLEINTHESTUDBECAUSETHESTUDISTHROUGHHARDENED5、INCASEOFECCENTRICTYPECAMFOLLOWERSCFE,THELENGTHOFTHEMOUNTINGHOLESHOULDBEMORETHAN05MMLONGERTHANTHEDIMENSIONOFECCENTRICCOLLARWIDTH6、FORMOUNTINGEASYMOUNTINGTYPECAMFOLLOWERS,ITISRECOMMENDEDTOFIXTHEFIXINGSCREWFROMTHEUPPERSIDETOTHESTEPPEDPORTIONOFTHESTUDINSPECTIONOFBEARINGCLEANINGOFBEARINGWHENINSPECTINGABEARINGAFTERREMOVAL,THEAPPEARANCEOFTHEBEARINGSHOULDBERECORDEDFIRSTTHEN,AFTERTHERESIDUALAMOUNTOFLUBRICANTISCHECKEDANDASAMPLEOFLUBRICANTISCOLLECTED,THEBEARINGSHOULDBECLEANEDFORCLEANING,LIGHTOILORKEROSENEISCOMMONLYUSEDCLEANINGISDIVIDEDINTOROUGHCLEANINGANDFINALCLEANING,ANDWIREGAUZEISSETASARAISEDBOTTOMINACONTAINERTOPREVENTTHEBEARINGFROMTOUCHINGTHEBOTTOMOFTHECONTAINERLUBRICATINGGREASEANDADHERINGSUBSTANCESSUCHASFOREIGNPARTICLESAREREMOVEDWITHABRUSH,ETC,USINGOILFORROUGHCLEANINGCARESHOULDBETAKENDURINGTHISPROCESS,BECAUSEIFTHEBEARINGISTURNEDWITHFOREIGNPARTICLESATTACHED,THERACEWAYSURFACESMAYBESCRATCHEDFINALCLEANINGISCARRIEDOUTBYTURNINGTHEBEARINGINCLEANINGOILITISDESIRABLETHATTHECLEANINGOILISKEPTCLEANBYFILTERINGIMMEDIATELYAFTERCLEANING,THEBEARINGMUSTBEPROTECTEDAGAINSTCORROSIONINSPECTIONANDEVALUATIONOFBEARINGTHEJUDGMENTASTOWHETHERTHEREMOVEDBEARINGISREUSABLEDEPENDSONTHEINSPECTIONAFTERCLEANINGCONDITIONSOFTHERACEWAYSURFACES,ROLLINGELEMENTSANDFITTINGSURFACES,WEARCONDITIONOFTHECAGE,INCREASEOFBEARINGCLEARANCE,DIMENSIONS,ROTATIONALACCURACY,ETCSHOULDBECHECKEDFORDAMAGEANDABNORMALITIESTHEEVALUATIONISPERFORMEDBASEDONTHEEXPERIENCETAKINGINTOCONSIDERATIONTHEDEGREEOFDAMAGE,MACHINEPERFORMANCE,IMPORTANCEOFTHEMACHINE,OPERATINGCONDITIONS,PERIODUNTILTHENEXTINSPECTION,ANDOTHERSUCHFACTORSMAINTENANCEANDINSPECTIONMAINTENANCEANDINSPECTIONARECARRIEDOUTTOMAINTAINGOODPERFORMANCEOFBEARINGSINSTALLEDINTHEMACHINEMAINTENANCEISPERFORMEDBYCHECKINGTHEMACHINEOPERATINGCONDITIONS,CHECKINGANDREPLENISHINGORREPLACINGTHELUBRICANT,CHECKINGTHEBEARINGANDRELATEDPARTSBYPERIODICDISASSEMBLYANDOTHERSUCHPROCEDURESITEMSFORINSPECTIONOFARUNNINGBEARINGINAMACHINEINCLUDETHEBEARINGTEMPERATURE,NOISE,VIBRATIONANDCONDITIONOFLUBRICANTDAMAGE,CAUSESANDCORRECTIVEACTIONROLLINGBEARINGSCANGENERALLYBEUSEDFULLYUPTOTHEIRROLLINGFATIGUELIFEIFTHEYAREPROPERLYSELECTED,MOUNTED,OPERATEDANDMAINTAINEDHOWEVER,THEYMAYACTUALLYBEDAMAGEDEARLIERTHANTHEIREXPECTEDLIFETIMESCREATINGPROBLEMSORACCIDENTSCOMMONCAUSESOFDAMAGEINCLUDEIMPROPERMOUNTINGORHANDLING,INSUFFICIENTLUBRICATIONANDPENETRATIONOFFOREIGNPARTICLESITMAYBEDIFFICULTTODETERMINETHEEXACTCAUSEOFAPROBLEMBYCHECKINGONLYTHEDAMAGEDBEARINGTHECONDITIONSOFTHEMACHINEBEFOREANDAFTERTHEOCCURRENCEOFTHEDAMAGE,THELOCATIONANDTHEOPERATINGANDAMBIENTCONDITIONSOFTHEBEARING,THESTRUCTUREAROUNDTHEBEARING,ETCSHOULDALSOBEEXAMINEDITTHENBECOMESPOSSIBLETOASSESSTHECAUSEOFTHEDAMAGEBYLINKINGTHECONDITIONSOFTHEDAMAGEDBEARINGTOTHEPROBABLECAUSESARISINGFROMTHEMACHINEOPERATION,ANDTOPREVENTTHERECURRENCEOFSIMILARPROBLEMS
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