ZUGSTANGENMECHANISMUS

摘要

In a wedge ring mechanism for providing a collet clamping force in a machine tool spindle, a sleeve member retains a plurality of steel balls. A mechanical advantage is realized as the balls are wedged between obliquely inclined surfaces. The sleeve member is provided with a plurality of cylindrical passageways so that positive control over the motion of the balls is maintained at all times during both engagement and release of the collet clamping force, thereby obviating the need to pinch out the balls during release.