Collet Chuck

The collet chuck (1) according to one of the preceding claims, characterized in that the receiving sleeve (3) is rotationally secured relative to the chuck body (2) through form-fitting engagement.

The collet chuck (1) according to one of the preceding claims, characterized in that the screw cap (4) has an installation opening (8*) that is accessible from the outside of the screw cap (4) for inserting rolling elements (5) between the screw cap (4) and the receiving sleeve (3).

The collet chuck (1) according to one of the preceding claims, characterized in that in its end oriented away from the screw cap (4), the receiving sleeve (3) has an opening (10) for a length-adjusting screw.

The collet chuck (1) according to one of the preceding claims, characterized in that the receiving sleeve (3) has a collar (7), which in the chucked state, rests flat against the end (11) of the chuck body (2) and/or the screw cap (4) has an inner end (12), which, in the chucked state, rests flat against the end (11) of the chuck body (2).

The collet chuck (1) according to one of the preceding claims, characterized in that the screw cap (4) can be screwed to the chuck body (2) by means of a multi-start thread (13, 14) and/or a thread (13, 14) embodied as a trapezoidal thread.

The collet chuck (1) according to one of the preceding claims, characterized in that at its outer circumference between its end (11) and an external thread for the screwing-on of the screw cap (4), the chuck body (2) has a damping element, which encloses the chuck body (2) in annular fashion at its outer circumference.

The collet chuck (1) according to one of the preceding claims, characterized in that at its end (11) oriented toward the screw cap (4), the chuck body (2) has a damping element.

The collet chuck (1) according to one of the preceding claims, characterized in that at its outer circumference, the chuck body (2) has a mating surface (15), which interacts with a corresponding counterpart mating surface on the inside of the screw cap (4) and as a result, centers the screw cap (4) relative to the chuck body (2) in a form-fitting way.

The collet chuck (1) according to one of the preceding claims, characterized in that in the region between its external thread (13) for screwing on the screw cap (4) and its end (11) oriented toward the screw cap (4), the outer diameter of the chuck body (2) tapers toward said end.

The collet chuck (1) according to one of the preceding claims, characterized in that the receiving sleeve (3) and/or the screw cap (4) and/or the chuck body (2), preferably at least in the region in which they come into form-fitting contact with one another, is/are provided with an in particular electrically non-conductive coating to improve the mechanical properties, in particular, a shape-memory alloy and/or a sliding coating and/or a wear-protection coating;

• the coating of the chuck body (2) and/or the receiving sleeve (3) and/or screw cap (4) can be different and in particular, the receiving sleeve (3) and/or screw cap (4) can each have several different coated regions, namely a coating is provided in the region in which the screw cap (4) and receiving sleeve (3) interact with each other and another coating is provided in the region in which the receiving sleeve (3) interacts with the chuck body (2) or another coating is provided in the region in which the screw cap (4) interacts with the receiving sleeve (3), or another coating is provided in the region in which a respective running surface for the rolling elements.

The collet chuck (1) according to one of the preceding claims, characterized in that the receiving sleeve (3) has at least two different types of slit, in particular slits that differ in terms of their length in the direction parallel to the longitudinal axis of the receiving sleeve (3).

The collet chuck (1) according to one of the preceding claims, characterized in that the receiving sleeve (3) has a form-fitting pull-out prevention element by means of which it can interact with a complementary pull-out prevention element on the tool shaft, thus providing a pull-out prevention for the tool.

The collet chuck (1) according to one of the preceding claims, characterized in that the conical surface by means of which the receiving sleeve (3) is compressed by the chuck body (2) has a cone angle of 0.5° to 4°, preferably 1° to 3°.

The collet chuck (1) according to the preceding claim, characterized in that the chuck body (2) has a receiving sleeve socket with an inner cone whose cone angle is less than or equal to that of the outer cone of the receiving sleeve (3).

The collet chuck (1) according to one of the preceding claims, characterized in that the receiving sleeve socket of the chuck body (2) has at least one groove that makes it possible to dispense coolant and/or lubricant into the working region of the tool through the tool holder.

A working unit for a machine tool that particularly operates by means of material-removing machining, composed of a collet chuck (1) in which a tool with a preferably cylindrical tool shaft is chucked;

• the collet chuck (1) includes a chuck body (2), a receiving sleeve (3), and a screw cap (4), which are matched to one another in such a way that by tightening the screw cap (4), the receiving sleeve (3) is driven into the chuck body (2) so that it fixes the tool shaft in the collet chuck (1) in a ready-to-operate fashion, characterized in that the receiving sleeve (3) and the screw cap (4) are permanently connected to each other and at the same time, are able to rotate relative to each other.