| 摘要 |
The screw has a ball groove formed on an inner circumference of a spindle nut. A return tube (4) is provided for balls, in which the balls are returned from an end to a beginning of the groove. A lubricant channel (6) is formed on an inner circumference of the return tube. The return tube is longitudinally divided along a parting plane into two half-tubes, where the channels are arranged on both sides of the parting plane. |
