| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball screw capable of easily supplying lubricant to a lubricant supplying member. SOLUTION: An oil reserving portion 22 is formed over the whole periphery of a lubricant supplying member 19, on an outer peripheral face of the lubricant supplying member 19 of a seal device 16 for sealing a gap between a screw shaft 11 and a nut 13, and a communication hole 23 is formed on a cylindrical portion of a seal portion receiving member 17 to communicate an oil supply passage 21 formed in the nut 13 and the oil reserving portion 22. COPYRIGHT: (C)2007,JPO&INPIT
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