RE-TIGHTENING DRILL CHUCK

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The invention relates to a re-tightening drill chuck with a chuck body (1), a clamping cone (2) which can rotate coaxially with respect to the chuck body (1) and is axially supported on a jaw holder (3), which is mounted on the chuck body (1) and in which clamping jaws (4) are guided in guiding slots and are adjustable for clamping and release by relative rotation between the chuck body (1) and the clamping cone (2) with the jaw holder, wherein a stop is formed on the jaw holder (3) and a counter-stop (11) is formed on the clamping cone (2) for the defined delimitation of a relative rotatability of the clamping cone (2) with respect to the jaw holder (3) between a first rotational position and a second rotational position. A snap-in locking device (12), which has a snap-in element (26) and a snap-in location (13) respectively assigned to the first rotational position and the second rotational position, is arranged between the jaw holder (3) and the clamping cone (2). Rotatably arranged on the chuck body (1) is a gripping sleeve (5), arranged in which is a locking slide (6), which is adjusted from a position in which it is disengaged from a first toothed ring (7) assigned to the chuck body (1) into a position in which it is engaged when a change takes place between the second rotational position and the first rotational position, and vice versa. A stop (8) is provided for delimiting the relative rotatability of the gripping sleeve (5) with respect to the jaw holder (3) in the sense of re-tightening.