The drill chuck (2) is located in a rotationally locked manner and with an axial displacement play on the drill spindle (1). To exclude this displacement play, a locking member (10) can be displaced into a recess (11) of the chuck body (7) by a coupling ring (12). In order nevertheless to avoid damage to the drill chuck (2) in this operating state, if the snap die (4) of the drill spindle has inadvertently not been released, the locking member (10) can emerge automatically from the recess (11) against the force of an abutmant (40) supported elastically on the coupling ring (12) and free the axial displacement play of the drill chuck (2). <IMAGE>
