| 摘要 |
A machine tool chuck includes a chuck body which supports a plurality of jaws having semi-cylindrical mounting portions and correspondingly formed jaw seating ramps within the chuck body to allow the chuck jaws to swivel within their seating ramps about their respective longitudinal axes. The ability to swivel compensates for roughness or irregularities on the workpiece clamping surfaces. A jaw actuating member interconnects the jaws for selective radial contraction and expansion; and upon the imposition of an external inwardly directed force upon the workpiece, the jaws are automatically drawn into more tightly clamping relation to the workpiece. |
