>> P.458
■OperatingTemperatureRangerangetemperatureTheoperatingBushingswithsealsis-30゜C〜+80゜C.ThemaximumallowabletemperatureforSphericalBushingswithoutsealsforthesteel-on-steeltypeand+150゜Cforthemaintenance-freetype.forSphericalis+180゜Cthehousingmaterialconsidering2WhentheloadactsintheYudirection;theSelectstressobtainedfromthefollowingequation.σ2=F k………………………(10)tensileC(DH-D)where, σ2: MaximumtensilestressoccurringinthehousingboreN/mm2■PrecautionsforUseDesignofshaftF:AppliedloadNC:WidthofouterringandhousingmmDH:OutsidediameterofhousingmmD:Outsidediameterofouterringmmk:Stressconcentrationfactor(RefertoFig.7.)0123456789DH/DFig.7Stressconcentrationfactor9876543210kStressconcentrationfactorWhentheloadislarge,slidingmayoccurbetweentheshaftandinnerringboreofbushing.Forsuchcases,itisnecessarytopreparetheshaftwithahard-nessof58HRCorgreaterandsurfaceroughnessofthe0.8μmRaorless.theshearand/orbendingstressesFurthermore,attentionmustbepaidtothestrengthofshaftbecauseintheallowablevalueseventheshaftmaysurpasswhenloadcapacityofSphericalBushings.isbelowthestatictheloadDesignofhousingThehousingshouldhavesufficientrigiditytoavoidharmfuldeformationunderload.WhenthehousingshowninFig.6isused,itshouldbedesignedwithsufficientstrengthasfollows.DHYUFFYLCDFig.6Shapeofhousing1WhentheloadactsintheYLdirection;Selectthehousingmaterialconsideringthecompres-sivestressobtainedfromthefollowingequation. ……………………………………(9)σ1=FCDwhere, σ1: Maximumcompressivestressoccur-ringinthehousingboreN/mm2F:AppliedloadNC:WidthofouterringandhousingmmD:OutsidediameterofouterringmmK9
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