Patent ID: 6908086

Claim:
A chuck comprising: a chuck body and a chucking head, wherein the chuck body has an internal cone surface, wherein the chucking head has an external cone surface which is matched to the internal cone surface of the chuck body, and wherein the chucking head is subdivided by axially and radially continuous separating slots into a number of chuck jaws which are combined with one another by elastic connecting elements, an anti-rotation locking means, which acts between the chuck body and the chucking head and whose part assigned to the chucking head is arranged in the plane of symmetry of one of the chuck jaws, the anti-rotation locking means comprising: one recess each on the internal cone surface of the chuck body in the circumferential region of each separating slot of the chucking head, wherein the recesses are at least approximately identical to one another, wherein the circumferential extent of the recesses is greater than that of the separating slot, wherein the axial extent of the recesses is at least equal to the greatest axial overlap distance of the two cone surfaces and wherein the recess is arranged symmetrically to the separating slot.