>> P.454
K5dNominalboredia.mmGE…EGE…ESGE…GGE…GS45681012151720253035404550607080901001101201401601802002202402602803003268405060728510011082100120142165192214RadialinternalclearanceMin.Max.RemarkAlsoapplicabletobushingswithseals.---68101215172025303540455060708090100110120140160180200220240260280unit:μmTable6RadialinternalclearanceofGE…ECtype(Maintenance-free)dNominalboredia.mm1517202530354045506070040050060072RadialinternalclearanceMin.Max.RemarkAlsoapplicabletobushingswithseals.■FitTherecommendedfitsforSphericalBushingsareshowninTables7and8.■SelectionofSphericalBushingsTable7RecommendedfitsforSteel-on-steelSphericalBushingsConditionNormaloperationWithdirectionallyindeterminateloadh6,j6m6,n6H7,J7M7,N7ToleranceclassShaftHousingboreRemarkN7toleranceisrecommendedforlightmetalhousings.Table8RecommendedfitsforMaintenance-freeSphericalBushingsToleranceclassofshafth6,j6H7,J7,K7ToleranceclassofhousingboreRemarkK7toleranceisrecommendedforlightmetalhousings.Selectionbetweenthesteel-on-steeltypeandthemaintenance-freetypeismadeconsideringtheoper-atingconditionssuchasload,lubrication,tempera-ture,andslidingvelocity.Loadcapacity1DynamicloadcapacityThedynamicloadcapacityCdisthemaximumallow-ableloadthatcanbeappliedonasphericalbushingunderoscillatingmotion.Itisobtainedonthebasisofthecontactpressureonthesphericalsurfaces.Thedynamicloadcapacityisalsousedforcalculatingthelifeofsphericalbushings.TherecommendedvalueofbushingloadisobtainedbymultiplyingthedynamicloadcapacityCdbyanumericalfactor,whichdiffersdependingonthebushingtypeandtheloadcondition.AguidelineforselectionisshowninTable9.Table9GuidefordeterminationofloadTypeofbushingSteel-on-steelMaintenance-free≦0.3Cd≦Cd≦0.6Cd≦0.5CdLoaddirectionConstantAlternateWhenthemagnitudeofloadexceedsthevaluegiveninTable9,pleaseconsultIKO.ThedynamicloadcapacityCdtconsideringtheinflu-enceofbushingtemperaturecanbeobtainedfromthefollowingequationusingthetemperaturefactor.Cdt=ftCd ……………………………………(1)where, Cdt:DynamicloadcapacityconsideringtemperatureincreaseN ft:Temperaturefactor(RefertoTable10.) Cd:DynamicloadcapacityN(Refertothedimensiontables.)unit:μmTable5RadialinternalclearanceofGEtype(Steel-on-steel)
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