>> P.45
1N=0.102kgf=0.2248lbs.1mm=0.03937inchABCDEFGHIJKLMTable 22 Fit between needle roller bearings with inner ring and shaftsShaft dia. mmOverIncl.Tolerance classof shaft1)Application examples (Reference)Operating conditionsLight load, normal load, low or medium rotating speedStationary load on inner ring Heavy load, medium rotating speedAll shaft diametersEspecially smooth operation and accuracy are required.g6h6h5Wheels on dead axlesControl lever gearsRope sheavesTension pulleysA4250100200-50150200-150-j5k5m6(2)n6(3)k5(4)m5,m6(2)n6(3)p6(3)n6(3)p6(3)Electric appliances, Precision machineryMachine tools, PumpsBlowers, Transportation vehiclesGeneral bearing applicationsPumps, Transmission gearboxes,Wood working machinery, Internal combustion enginesIndustrial vehicles, Construction machineryCrushers-50100200-5015020050-1Light loadRotating load on inner ring or Directionally indeterminate Normal loadloadHeavy loadShock loadNotes(1)This table applies to solid steel shafts.(2)It is necessary to examine the reduction of radial internal clearances caused by the expansion of inner rings after mounting.(3)It is necessary to use bearings with radial internal clearances greater than CN clearance.(4)For NATA and NATB, do not use a tighter t than k5.Table 23 Tolerance class of shafts assembled with needle roller bearings without inner ringFwNominal roller set bore diametermmOver-6580160180200250315Incl.6580160180200250315-Radial internal clearanceSmaller than CN clearanceCN clearanceLarger than CN clearanceTolerance class of shaft(1)k5k5k5k5j5j5h5g5h5h5g5g5g5f6f6f6g6f6f6e6e6e6e6d6Note(1)When the housing bore t is tighter than K7, the shaft diameter is made smaller by considering shrinkage of roller set bore diameter after mounting.
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