Patent ID: 6533290
Filing Date: 2003-03-18
Classification: B23B,Y10T

Abstract:
A machine tool feeder chuck, including:a tubular chuck body having an axial bore through which a bar to be inserted into the machine tool is passed, a screwthreaded upstream section for fixing the chuck to a feeding carriage of the machine tool, a chuck body downstream section, including longitudinal slots so that it has a capacity for elastic deformation in the radial direction enabling it to bear on the exterior surface of the bar, and including an external conical clamping bearing surface, an exterior envelope, having a downstream section with an internal conical clamping bearing surface in contact with the external conical clamping bearing surface of the chuck body, and having an upstream section with an interior screwthread meshing with an exterior screwthread of the chuck body to clamp the downstream section of the chuck body in the radial direction, wherein: the screwthreaded fixing upstream section of the chuck is fastened to the chuck body, the exterior envelope has a structure having a high resistance to radial expansion in its downstream section with the internal conical clamping bearing surface, the exterior envelope includes means conferring on it a capacity for elastic deformation in the longitudinal direction in the part of its length between the internal conical clamping bearing surface and the interior screwthread.