| 摘要 |
PROBLEM TO BE SOLVED: To markedly reduce vibration and noise of a ball screw. SOLUTION: Super finishing is performed after grinding, so as to obtain at least surface roughness in a ball rolling groove 4 of a screw shaft 1 in 0.12μm or less by mean roughness (Ra). A separator 7 having a ball hold surface 71 of recessed face is arranged between balls 3. |
