| 摘要 |
<p>A 4-jaw work holding rotary chuck with jaws (10) adjustable in pairs with equal and opposite motion by adjusting screws (16) with right and left hand screwthreads (18, 20) at their opposite ends, the chuck also having means operable independently of the adjusting screws (16) for effecting a differential adjustment of one of each pair of oppositely disposed jaws (10) relative to the other. …<??>So that the adjusting screws (16) can be turned to adjust the jaws (10) in oppositely disposed pairs without unwanted movement of the means for effecting differential adjustment of the jaws, said means are associated with lockable driving mechanism (45) constituted by respective spring loaded driving members (60) capable of non-rotatably engaging the body part (14) of the chuck or a part connected thereto.</p> |
