Because rolling bearing turns, in under the effect of load,the distortion of rolling bearing cause vibration.
The vibration is basically caused by the collar of bearing, what is more, bearing structure, stiffness, manufacturing precision and installation conditions and other factors, such as the useage, If inner bearing ring has the big radial direction ripples, when outer roll bearing will produce radial vibration. Inner bearing circle of ripples would not only cause outer radial vibration, and will also cause the outer axial vibration, bearing by axial load will make bearing inner and outer shaftchange the relative position.
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