Patent ID: 6354179
Filing Date: 2002-03-12
Classification: B23B,Y10T

Abstract:
A combination of a device, a holder and a tool, the tool having a tool shank and a cutting part, the holder having an insertion opening for accommodating the tool shank, said device having a clamping element mounted for rotation a restricted extent about an axis of rotation in the holder, the clamping element being mounted for rotation at bearing locations of the holder, the axis of rotation being aligned transversely to an axis of insertion of the insertion opening, and the clamping element having a partially cylindrical surface portion which is eccentric in relation to the axis of rotation thereof, the tool having a partially cylindrical recess aligned transversely to a shank axis in a surface of the shank, and wherein the clamping element, during a clamping operation, is screwable at the partially cylindrical surface portion into the partially cylindrical recess, and bends flexibly between the bearing locations to produce a self-locking frictional connection between the bearing locations, thereby automatically setting a position for a cutting edge that is defined with respect to the axis of insertion of the holder in axial and radial directions, as well as in a circumferential direction with respect to the axis of insertion, while fixing the tool shank to the holder and eliminating radial and axial shank backlash in the insertion opening, wherein the clamping element in a flexibly bent fixed state is pressed to a greater extent against a wall of the recess of the tool shank near extreme ends of the clamping element than in a middle region of the wall.