| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a ball screw in which breakage is hardly generated in a lock part of a dowel by a force of a ball for pushing up the ball, and the lock part of the dowel hardly comes off from a nut.SOLUTION: A groove 23 which extends to a radial direction by a prescribed dimension is formed at a penetration hole side face 22a of a penetration hole 22 of a nut 2. A dowel 4 has a claw 43 which is engaged with the groove 23 at a side part in a width direction of a ball return passage 41. The dowel 4 is arranged in the penetration hole 22 of the nut 2 by making the claw 43 engaged with the groove 23, and in a state that an annular body 6 is attached to the nut 2, a clearance exists between a face 23a at the outside of the nut radial direction of the claw 43 and the groove 23 and a face 23b at the inside of the nut radial direction.</p> |
