| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball screw capable of feeding lubricant to a frictional surface between balls over a long period while avoiding decrease in load capacity. SOLUTION: A spacer 6 is inserted between the balls 3 and 3 provided between thread grooves 4 and 5 of a screw shaft 1 and a nut 2. The spacer 6 comprises a through-hole, and adjoining balls 3 and 3 in the through-hole can contact to each other. The ball screw is thereby formed by using loaded balls for all balls. |
