HIGH SPEED SPINDLE MOTOR AND ITS MANUFACTURE

摘要

PROBLEM TO BE SOLVED: To provide a high-speed spindle motor suppressing the deviation of a shaft and the deviation of a plane at high-speed rotation. SOLUTION: This spindle motor loosely fits a retainer 11 and a revolving shaft 7 inside of a bearing housing 1 attached at the center of a stator base 4. In the roller holding part of the retainer 11, the roller group 9 at the first row that revolves on the track at the first distance from the center of the rotation and also the roller group 10 at the second row that revolves on the track at the second distance from the center of the rotation are inserted.