A method for optimizing the distribution of mass and of the tensile stress of the invention is to barrel in the case of a tool, and such a tool

摘要

The present invention relates to a method for the optimization of the distribution of mass and of the brake application mechanism various barrel in the case of a tool, in particular for clamping a drill bit in a dental hand piece. The tool comprises a sleeve-like collet chuck (14, 114, 214), which at the circumference of slots (15, 115), which the collet chuck (14, 114, 214) in tension lever (16, 18; 116, 118, 216, 218) with clamping surfaces (16a, 18a, 116a, 118a, 216a, 218a) for clamping the tool and for exerting a clamping force on the clamping surfaces (16a, 18a, 116a, 118a, 216a, 218a) divide. The collet chuck (14, 114, 214), by means of an outer contour, an inner contour, and a by means of a width b of the slots (15, 115, 215) certain slit geometry (32, 132, 232) described. The outer contour of the collet chuck is obtained by means of a course of an outer radius r determines. The inner contour of the collet chuck is obtained by means of a course of an inner radius r determines.According to the invention reduces the inner radius r of the collet chuck, starting from the sleeve-shaped portion (14a) of the collet chuck (14, 114, 214) in the direction of the clamping surfaces (16a, 18a, 116a, 118a, 216a, 218a).