| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ball screw device capable of dissolving a lack of lubrication. Ž<P>SOLUTION: This ball screw device 1 is used in a form in which a hollow shaft 5 and a ball screw nut 3 are rotated and a screw shaft 2 straightly moves in the axial direction. The inner surface of the hollow shaft 5 has a tapered surface 11a so that the lubricating agent supplied to the screw shaft 2 is easily moved upward by a centrifugal force. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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