>> P.53
1N=0.102kgf=0.2248lbs.1mm=0.03937inchABCDEFGHIJKLM2ReplenishmentofgreaseThelifeofgreasedependsonitstypeandquality,thetypeanddimensionsofthebearing,operatingcondi-tions,temperature,amountofwear,penetrationoffor-eignparticlesandwater,etc.Fig.20showsthegreasereplenishmentintervalsasageneralguideline.Thevaluesobtainedthisdiagramapplyundernormalloadconditionswhenthemachinebodyisstationaryandforcessuchasinertiaarenotactingonit,andtheoperatingtemperatureontheoutersurfaceofthebearingouterringislessthan+70°C.temperatureexceeds+70°C,asageneralrule,thereplenishmentintervalishalvedforevery15°Cincrease.fromtheIf10md=m20Greaselubricationtobefilleddependson1AmountofgreasetobefilledtheTheamountofgreasehousingstructure,dimensions,typeofgreaseusedandatmosphere.Generally,fillingabout1/3to1/2ofthefreespaceinsideofthebearingandthehousingisconsideredtobeappropriate.Toomuchwillcauseariseintemperature,andcareshouldbetakenespe-ciallyathighspeedrotations.InFig.19,severalgreasepocketsareprovidedbythegreasesectorsononesideofthebearing.Eveniftheforceatfilledgreaseisdispersedbyhighrotationalspeeds,isthegreasepocketsanddivertedbackintothebearingagain.Oldgreaseaccumulatesinthespaceontheoppositesideofthebearing,andthiscanberemovedperiodicallybytakingoffthecover.thecentrifugaltrappedbyit200200400600100020004000600010000Rotationalspeed,nmin-1Remarkdistheborediameteroftheinnerring.Forabearingwithoutaninnerring,therollersetborediameterFwisusedford.Fig.20IntervalforreplenishmentofgreaseA503040506180100120140160202800238000400Fig.1920000150001000080006000500040003000200015001000800600500400300Replenishmentintervalforgrease,tfhours
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