>> P.74
1-4BearingSelection(17)LubricantsGreaseamountThestandardgreaseamountforminiatureandsmall-diameterballbearingsis30%.Insertedamountssuitedtotheapplicationareshowninthetableatright.InsertedamountsymbolInsertedamountXLTNosymbol(standard)HJ5~10%10~15%15~20%25~35%40~50%50~60%CautionInrecentyears,asdevicesbecomemorecompactandlighter,resinmaterialsaremorefrequentlyusednearbearings.Someresinmaterialsreactbadlyinscientifictermstosometypesofoilandgrease,leadingtodeteriorationordamage.Whenselectinglubricants,considertheoperatingenvironmentcarefullyandtakecaretoavoidtheseproblems.Table17-1LubricanttypesNameThickenerBaseoilmaincomponentNoiseTorqueHigh-Low-temperatureenvironmenttemperatureenvironmentHigh-speedrotationResindeteriorationLithiumsoapgreaseLisoapEsters,etc.UreagreaseUreaSynthetichydrocarbonEstersFluorinegreasePTFEFluorineConductivegreaseCarbon-basedOil-Fluorine+estersSynthetichydrocarbonFluorineEstersSynthetichydrocarbon◎◎◎◎◎△----××◎◎◎◎◎○△△○○○△--◎◎◎◎◎◎○△◎◎○◎◎◎◎◎◎◎◎◎◎◎◎◎△△○◎△×-○◎---◎○*1:Fortheresindeterioration*mark,consultMinebeaMitsumi.*2:Theoperatingtemperaturerangeisthevalueslistedinthelubricantmanufacturercatalog,notthebearingoperatingtemperaturerange.(Dependingonthemanufacturer,thesettingmethodmaydiffer,soconsiderthesenumbersonlyasreference.)Remarks:Qualitydisplaymarks:Excellent←◎◎◎-◎◎-◎○-◎-○○-○-△-×-××→Poor△△◎◎-△△-××△△××○×*1*1*1×○○×○74
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