Abstract: A shank (4) of the chuck (1) has an axially located cylindrical opening (41) for holding a fixation lug (5) of a tool (6). A stop piece (11, 12, 13) provided with a rack-like tooth member (14) is axially movably mounted in a bore (10) which is also axially located. An adjustment shaft is inserted in a bore (15) located at a right angle to the chuck axis and provided with a second toothed member (17) which engages with the first toothed member (14) on the stop piece. This makes it possible to adjust the stop piece (11), one end (12) of which forms the stop for the fixation lug (5) of the tool (6), from the side of the chuck. The time-consuming repeated removal and insertion of the chuck from a presetting device, as occurs in prior art devices, can be eliminated.