| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a ball screw and a manufacturing method for the ball screw which are capable of reducing manufacturing cost and preventing deterioration of lubrication in a load raceway caused by operation of the ball screw.SOLUTION: In a ball screw, a raceway constituted by a raceway groove 11 of a screw shaft 10 and a raceway groove 21 of a nut 20, includes a load raceway on which balls 30 are rollably disposed, and a not-loaded raceway on which the balls 30 are not disposed and grease is retained.</p> |
