Ball and Roller Bearings

Technical DataFitting surface pressurePmkgf/mm 2 MPa5 504 403 30210.50.40.30.20.120105432120 30 50 70 100 200 300 500MPa250200Fig. 17.5.1 Average fit interference as it relates to surfacepressure Pm and max. stress t maxjs51501005040Nominal bearing bore diameter (Class 0) mmk5p6n6m53020105kgf/mm22520151054321t max0.5Maximum stress17.6 Necessary press fit and pullout forceEquations (17.1) and (17.2) below can be used tocalculate the necessary pullout force for press fit for innerrings and shafts or outer rings and housings.For shaft and inner rings:Kd = PdB (17.1)For housing and outer rings:KD = PDB (17.2)Where,Kd : Inner ring press fit or pullout force NkgfKD : Outer ring press fit or pullout force NkgfP : Fitting surface pressure MPakgf/mm 2 (Refer to Table 17.5.1)d : Shaft diameter, inner ring bore diameter mmD : Housing inner diameter, outer ring outerdiameter mmB : Inner or outer ring width : Sliding friction coefficient (Refer to Table 17.6.1)Fitting surface pressurePmkgf/mm 2 MPaMPa10 100kgf/mm 2400 40543210.50.40.30.250403020105432m5k5js520 30 50 70 100 200 300 500300250200150100Nominal bearing bore diameter (Class 0) mmp6n6504030201030252015105432t max1Maximum stressTable 17.6.1 Press fit and pullout sliding friction coefficientTypeInner (outer) ring press fit onto cylindrical shaft (bore)Inner (outer) ring pullout from cylindrical shaft (bore)Inner ring press fit onto tapered shaft or sleeveInner ring pullout from tapered shaftSleeve press fit onto shaft/bearingSleeve pullout from shaft/bearing0.120.180.170.140.300.33Fig. 17.5.2 Maximum fit interference as it relates to surfacepressure Pm and max. stress t max1 For recommended fitting, see page A-50.A-104