| 摘要 |
<p>A non-impact keyless chuck (10) suitable for use with manual or powered drivers is disclosed. The chuck (10) comprises a body (16) which carries a rotatable split nut (38) having a relatively fine thread (40) and a plurality of slidable jaws (18), which may be identical, driven by the rotatable nut. An anti-friction bearing (48) is disposed between the rotatable nut (38) and a bearing thrust ring (50) mounted on the body. A clutch or torque limiting mechanism is provided to limit the tightening torque to a predetermined value while the loosening torque may be limited or unlimited. The front sleeve (12), and rear sleeve (14), if used, may be formed from a structural plastic to reduce manufacturing costs. A relatively soft elastomeric grip boot may be placed on the front sleeve to improve the grip and temporarily restrain and center the tool during chuck tightening or loosening operations. A relatively soft elastomeric grip boot may also be placed on the rear sleeve, if used. <IMAGE></p> |
