| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball screw device for reducing the shake of a screw shaft at its end when an excessive load is applied to the screw shaft.SOLUTION: A ball screw device 1 includes a screw shaft 10 having a spiral groove 11 formed in the surface, and a bearing 20 for supporting a bearing installation part 10a formed at the end of the screw shaft 10. Herein, an annularly shaped spacer 50 is provided which is fitted to the bearing installation part 10a. An end face 50a in the axial direction of the spacer 50 abuts on an inner ring 21 of the bearing 20. Knurling work is applied to the inner peripheral face of the spacer 50. |
