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K2■StructureandFeaturesIKOSphericalBushingsareself-aligningsphericalplainbushingsthathaveinnerandouterringswithsphericalslidingsurfaces,andcantakealargeradialloadandabi-directionalaxialloadatthesametime.TherearemanytypesofSphericalBushings,buttheyarebasicallydividedintosteel-on-steeltypesandmaintenance-freetypesaccordingtothekindofslid-ingsurfaces.Steel-on-steelSphericalBushingshaveinnerandouterringsofhighcarbonchromiumbearingsteel,ofwhichslidingsurfacesarephosphate-treatedandthendry-coatedwithmolybdenumdisulfide(MoS2).Theycan,therefore,operatewithlowtorque,andhaveexcellentwearresistanceandlargeloadcapaci-ty.Theyareespeciallysuitableforapplicationswheretherearealternateloadsandshockloads.Theyhavewideapplicationsmainlyinindustrialandconstructionmachinery.Maintenance-freeSphericalBushingsconsistofanouterringwhichhasaspecialPTFElinerreinforcedwithcopperalloymeshesontheslidingsurface,andasphericalinnerringofwhichslidingsurfacehasahardchromiumplating.Creepdeformationduetocompressiveloadissmall,andwearresistanceissuperior.Thus,theyaremaintenance-freeandcanbeusedforextendedperiodsoftimewithoutre-lubri-cation.Theyareespeciallysuitableincaseswherefixeddirectionalloadsareappliedandareusedmain-lyinfoodprocessingmachinesandconstructionmachineryandinotherapplicationsinwhichtheuseofoilisundesirableorlubricationisnotpossible.StructuresofSphericalBushingsOuterring(MoS2coating)Innerring(MoS2coating)Steel-on-steeltypeOuterring(MoS2coating)Innerring(MoS2coating)Seal(Polyurethane)OuterringOuterringSpecialPTFEliner(Reinforcedwihcopperalloymeshes)Innerring(Chromiumplating)Innerring(Chromiumplating)Seal(Syntheticresin)SpecialPTFEliner(Reinforcedwihcopperalloymeshes)Steel-on-steeltypeMaintenance-freetypeMaintenance-freetype■TypesSphericalBushingsareavailableinvarioustypesshowninTable1.Table1TypeofbearingTypeSeriesMetricInchSBSB…AGE…E,ESGE…G,GSSBB--GE…S-2RSGE…S-2RSSBB… -2RSGE… EC-GE… EC-2RS-Maintenance-freeWithoutsealsWithsealsSteel-on-steelWithoutsealsWithsealsK
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