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In this paper, we researched the NRRO of an angular contact ball bearing for machine tools. At first, we developed a new apparatus for measuring rotational accuracy of rolling bearings. It was cleared the following results by measuring the radial NRRO used this apparatus. (1) The NRRO of cage rotation increased with rotational speed. (2) The influence of the shape error of inner and outer ring on NRRO was small. (3) The influence of the shape error and the diameter difference of balls were very big.

nihon kikai gakkai ronbunshū. c

Reduction of Radial NRRO of an Angular Contact Ball Bearing for Machine Tools (1st Report, Development of Apparatus for Measuring NRRO and Grasp of Present Situation)