Abstract: An arrangement for holding a tool fitting for driven tools has a spindle with a forward directed surface and a bore which intersects the forward directed surface and which, starting from the forward directed surface, extends rearwardly in order to receive a shaft of the tool fitting as well as with a device for locking the tool fitting with the spindle. Inner and an outer locking elements of the arrangement are engage a bayonet coupling and a manacle ring is engaged with the outside of the spindle. The manacle ring also acts directly on the outer locking element and the outer locking element is formed by a projecting element which engages in a blind stop groove in the inner locking element. The stop groove extends first axially and then subsequently radially in a circumferential surface of the tool fitting starting from an end face of the tool fitting.

Abstract: Arrangement for holding a tool fitting has a spindle with a forward directed surface and a bore which intersects the forward directed surface and which, starting from such surface, extends rearwardly in order to receive a shaft of the tool fitting. A device for locking the tool fitting with the spindle has an inner and an outer locking element which engage on another. The locking elements act in the manner of a bayonet coupling, wherein a projecting element is disposed in a blind stop groove extending first axially and subsequently radially in a circumferential surface starting from an end face.

Abstract: A collet chuck for retaining a thread cutting tool with a sleeve is axially movable in the interior and has a mechanism for retaining the thread cutting tool. To shorten the tool changing times it is provided that the mechanism for retaining the tool is an axially movable quick-change sleeve guided in the collet chuck or in the sleeve, which quick-change sleeve is developed such that it is stayed via a spring, axially with respect to the sleeve and a clamping body for clamping a tool is provided.

Abstract: An article of jewelry has a first (5) and a second part (3) and a hinge (7) which articulatedly connects the two parts (3, 5) in such a way that the parts (3, 5) are movable between a first closed position and a second opened position. The article of jewelry is characterized in that a spring (21) is provided which forces the two parts (3, 5) into the closed position.

Abstract: A cutter plate (20) for a milling tool (10), has a top surface (26) with fastening hole and a bottom surface (28) with a thread cutting profile. Between these two faces (24, 26) and at a side surface (28), a cutting edge (32) is formed which is adjoined in the top surface (24) by a chip guide groove (34) with chip outlet edge (36). The cutting edge (32) and the chip outlet edge (36) are disposed on helicoidal paths (38, 40) which diverge in top view. Tooth edges (42) on the side surface form angles (b) with the top surface (24). The cutter plate (20) can be installed obliquely to the tool axis, for example the shaft of the tool in order to achieve a soft first cut, which has a higher degree of quiet running, longer tool life, and a lower cutting pressure of the tool and to effect higher stability of the tool, in particular with small shaft diameters.

Abstract: A cutting tool having a cutting plate with at least one blade and a central axial hole through which a head screw can be used to connect the cutting plate to a holder having an axial bore through its center for receiving the screw and a recess around the bore for receiving a complimentary projection located around the central hole of the cutting plate which is longer than the recess is deep. Alternate embodiments are provided in which the projection is located on the holder and the recess in the face of the cutting plate. In all embodiments, the recess and projection have contacting surfaces which substantially eliminate axial forces on the head screw.

Abstract: On a chuck, the clamping jaws can be adjusted axially by means of an internally threaded sleeve of a jackscrew actuator in one direction for clamping and in the other direction for release. When the jaws are adjusted in the clamping direction, the clamping jaws are moved radially inward by interaction with a jaw convergence sleeve; for an axial movement in the release direction, the clamping jaws are moved radially outward by interaction with jaw expansion means attached inside the jaw convergence sleeve. The internally threaded sleeve is designed on its one end as an expansion cage for the clamping jaws lying inside the convergence sleeve, and is centered by an adjacent sleeve extension in the base unit. The internally threaded sleeve is guided both inside the expansion cage and inside the sleeve extension centering on the guide sleeve.