装有滚动轴承的主轴部件的回转精度,取决于滚动轴承的精度,主轴的制造精度,和主轴相配合的其他零件制造精度,装配质量及轴承的间隙(或过盈)等。其中轴承内圈的径向跳动,主轴锥孔中心线对轴颈的径向跳动,是造成主轴部件装配后中心线偏移的主要原因。但是,如果采用恰当的选配方法,则可降低轴承 The accuracy of the rotation of the spindle components fitted with rolling bearings depends on the precision of the rolling bearing, the manufacturing precision of the spindle, the manufacturing precision of other components matched with the spindle, the assembly quality and bearing clearance (or interference). The radial runout of the inner ring of the bearing and the radial runout of the centerline of the spindle taper hole on the journal are the main causes of the deviation of the centerline after the assembly of the spindle component. However, the bearings can be reduced if the proper matching method is used