Toothed tool coupling for metal cutting devices

摘要

A metal cutting tool includes a stationary tool holder and a mounting body therefor. The tool holder includes a first coupling part which is restrained by a second coupling part on the mounting body. The coupling parts are coaxially arranged one inside of the other. The coupling pars are conical as viewed in a longitudinal section plane containing the axis. The first coupling part includes teeth projecting generally radially with respect to the axis and received in respective radially-open recesses formed in the second coupling part. Each of the teeth makes contact with a wall of the respective recess at first and second contact places which are respectively situated on opposite sides of a generally radial line of symmetry of the tooth. The contact places are operable to transmit a restraining force from the second coupling part to the second coupling in respective directions. A restraining angle in the range of -5° to +45° is formed at each contact place.