| 摘要 |
There is provided a return pipe type ball screw capable of accurately positioning and fixing return pipes on and to a nut member even when a troublesome positioning operation is not carried out, and circulating balls endlessly and smoothly for a long period of time without the possibility that dust enters the interior of the nut member. In such a ball screw, ball passing holes formed so as to extend through the nut member are inclined at an angle equal to a lead angle of a ball rolling groove of a screw shaft, and each of the return pipes is formed by combining together a pair of return pieces adapted to be fitted in the ball passing holes. |
