Spannfutter für Drehmaschinen

摘要

The specification discloses a chuck having radially moveable jaws and driving means for the jaws which disengage from the jaws in outer positions of the jaws. Each jaw has associated therewith a holding member which is engaged with the jaw and moves therewith and prevent the jaws from coming out of the chuck body when disengaged from the driving means. Each holding member is releasable from its jaw by radially inward movement of the jaw and holding member while the jaw is disengaged from the driving means.