The Influence of Lubrication Fluctuation on the NRRO of the Components of Retainer Rotation in a Ball Bearing

摘要

The nonrepetitive runout (NRRO) value of the components of retainer rotation is caused mainly by the diameter differences of balls contained in one bearing. In measuring NRRO for a long time, it was often observed that the NRRO of retainer rotation fluctuated suddenly. Geometric errors were not regarded as a cause. In this paper, we made an instrument that could let a lubrication state change intentionally and investigated the influence of lubrication fluctuation on the NRRO of retainer rotation. We found that lubrication fluctuation caused a change of the NRRO of retainer rotation at the nanometer level.