| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce bearing torque without decreasing supporting rigidity and a life caused by noises. SOLUTION: Dimensions for a ball diameter, a bearing outer diameter, and a bearing bore diameter are set so as to satisfy the following expression (1) when the ball diameter is set at DW, the bearing outer diameter is set at D, and the bearing bore diameter is set at d. 0.650<=DW/ (D-d)/2}<=0.750...(1).</p> |
