| 摘要 |
The chuck has a body (16) having a threaded shaft (18) and an integral circular plate (20) with three angular apertures (34), the axes (36) of which converge on the chuck axis of rotation (12). A hollow, stainless steel cone (50) is crimped to the periphery of the plate to provide an inside guide surface of three jaws (40) disposed in respective apertures (34). A nut (70) with captured bevelled washer (74) and rotatable jaw retainer (72) is threaded to the shaft (18), and the jaw ends (44) distant the workpiece gripping ends (42) are connected to the retainer. The nut advances and retracts the jaws. A plastic nut-actuating sleeve (90), protectively covering the nut and the jaws, is splined to the nut and rotatably carried by the cone. The body is formed by upsetting or cold heading a rod, and the cone is formed by deep drawing sheet material. |
