| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball screw excellent particularly in wear resistance in the case of high-speed drive and a high load. SOLUTION: For the ball screw is used a grease which has a sulfur-containing extreme pressure additive consisting of at least one out of a monosulfide, a disulfide, a sulfoxide, and a thiolsulfinate. The grease contains the extreme pressure additive in such an amount that the grease may have a sulfur content of 0.08 mass % to 2.08 mass %. COPYRIGHT: (C)2004,JPO&NCIPI |
