HousingNominalbore diameterBearingOutside diametertoleranceHousing bore diameter deviations, resultant fits1)Tolerance classesDtΔDmpK6ⒺK7ⒺM5ⒺM6ⒺM7ⒺDeviations (housing bore diameter)Theoretical interference (–)/clearance (+)overincl.lowhighProb

ShaftNominaldiameterBearingBore diametertoleranceShaft diameter deviations, resultant fits1)Tolerance classesdtΔdmph6Ⓔh8Ⓔh9Ⓔj5Ⓔj6ⒺDeviations (shaft diameter)Theoretical interference (–)/clearance (+)≤LUProbable interference (–)/clearance (+)

HousingNominalbore diameterBearingOutside diametertoleranceHousing bore diameter deviations, resultant fits1)Tolerance classesDtΔDmpH7ⒺH8ⒺH9ⒺH10ⒺJ6ⒺDeviations (housing bore diameter)Theoretical interference (–)/clearance (+)overincl.lowhighPro

HousingNominalbore diameterBearingOutside diametertoleranceHousing bore diameter deviations, resultant fits1)Tolerance classesDtΔDmpF7ⒺG6ⒺG7ⒺH5ⒺH6ⒺDeviations (housing bore diameter)Theoretical clearance (+)overincl.lowhighProbable clearance (+)

HousingNominalbore diameterBearingOutside diametertoleranceHousing bore diameter deviations, resultant fits1)Tolerance classesDtΔDmpN6ⒺN7ⒺP6ⒺP7ⒺDeviations (housing bore diameter)Theoretical interference (–)/clearance (+)overincl.lowhighProbable

Bore diameterHousingUnit seriesMetricInchSeriesMaterialStandardYAR 2.. 2Fstandard seals withadditional flingers (fig. 1)standard grease (VT307)✔✔FY .. M (fig. 2)Cast ironISOFY .. TF–✔FY .. U1) (fig. 2)FY .. TF–✔FYM .. TF✔✔FYTB .. M (fig. 

Shaft diameterdadadbdcdbdcLabyrinth seal1)Contact seal3)Taconite sealsEnd plug5(00)Series6(00)Series2(00)Series2(00)Series3(00)Series3(00)SeriesRing sealO-ring for LOR2)Speed limit4)with contact seal5)with V-ring sealSpeed limitin.in.–r/min–r/min

ShaftNominaldiameterBearingBore diametertoleranceShaft diameter deviations, resultant fits1)Tolerance classesdtΔdmpr6+IT6r7+IT7Deviations (shaft diameter)Theoretical interference (–)overincl.lowhighProbable interference (–)mmµmµm315355–400+180+

HousingstandardLocking methodBore diameterBearing seriesHousing series Unit seriesMetricInchISOEccentric lockinggrub screws✔✔YAR 2.. 2Fstandard seals withadditional flingers (fig. 1)standard grease (VT307)SY .. MSY .. TF✔✔YAR 2.. 2RFmultiple se

Inner ring and bearing widthdtΔdmptVdsptVdmptΔBstKiatSdtΔTstΔT1stΔT2s≤UL UL ULULULmmμmμmμmμmμmμmμmμmμm10180–7550–20057+200–200+100–100+100–10018300–8650–20058+200–200+100–100+100–10030500–10850–24068+200–200+100–100+100