| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball screw device capable of reducing the noise emission. SOLUTION: The ball screw device is structured so as to meet the condition ¾Δt/Dw¾≤0.03, whereΔt is the level difference in the radial direction between a preparatory hole 7a for a hole 7 formed at the periphery of a nut 6 and the end part inside surface of a circulating tube 8, and Dw is the diameter of balls 5, and it is arranged so that the maximum value ofΔt is limited by Dw. COPYRIGHT: (C)2005,JPO&NCIPI
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