Chucking device

A chucking device for a tool, said chucking device comprising:

• a tool receiving element;
• a collet for clamping the tool, said collet being inserted into an opening in the tool receiving element;
• a clamping nut for axially displacing the collet in relation to the tool receiving element;
• and
• a pressure piece which is disposed between the clamping nut and the collet and is rotatably mounted in relation to the clamping nut, such that the pressure piece allows the collet to be axially displaced in relation to the tool receiving element by the clamping nut,
• wherein the pressure piece comprises coupling elements for a torsion-proof connection to corresponding mating elements of the tool receiving element,
• the pressure piece and the collet are connected by a coupling so as to be torsion-proof and detachable in such a manner that the pressure piece and the collet assume a predefined angular position in relation to each other when connected by the coupling,
• one of the collet and the tool receiving element includes detent lugs for torsion-proof engagement in corresponding detent grooves of the other of the collet and the tool receiving element, the detent lugs engaging in the detent grooves by a rotational movement relative to each other, and
• the detent grooves or detent lugs of the tool receiving element are positioned at the same angle relative to the mating elements of the tool receiving element as the detent lugs or detent grooves of the collet are positioned relative to the coupling elements of the pressure piece.