| 摘要 |
<p>A positive feed tool includes a differential feed gear (246) and differential drive gear (244) coupled to a spindle (208) via spindle drive gear (250) and spindle feed gear (248) so that rotational drive and axial feed is imparted to the spindle during machining. In order to prevent torque overload of the tool or drive train, an apparatus and method is disclosed for limiting the transmission of power from the motor (202) to the spindle (208). Also disclosed is an apparatus and method for causing the spindle (208) to automaticaly retract when the high torque situation develops.</p> |
