| 摘要 |
A tool support, or an extension or reduction part holding a tool support, is held by its shank in an axial bore of a socket of the tool-holding device. The socket has one or more further bores, the longitudinal axes of which each form an angle of from 0 DEG to about 5 DEG with a straight line perpendicular to the longitudinal axis of the socket. A setscrew disposed in one such further bore cooperates by means of a beveled or faceted surface at its lower end with a chucking surface running on the outside of the shank at an angle to the longitudinal axis thereof. Another setscrew may cooperate with a second such chucking surface forming an angle of about 45 DEG with the first chucking surface. Faultless force-locking and a bias are produced between the end faces of the socket and of the tool support, thus making it possible to combine even large, heavy boring tools with universally usable tool-holding devices inasmuch as there is sufficient resistance to torsional stress between the tool-holding device and the tool support.
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