| 摘要 |
PROBLEM TO BE SOLVED: To properly feed lubricating grease to the most important sliding surface of a power-operated chuck. SOLUTION: This power-operated chuck has a chuck body 1 and a tightening tooth 2 guided along the radial tooth guide recess thereof. In addition, the tightening tooth 2 is housed within the chuck body 1 and driven with at least one drive member 6. In this case, cutout parts 11 for forming space filled with lubricating grease are respectively formed within the intermediate range of the radial tooth guide recess 3 of the chuck body 1. |
