Abstract: A machine tool comprises a spindle stock (11) and a tool magazine (29) in which a plurality of tool-carrying toolholders (17) can be displaced along an endless path in a plane perpendicular to the axis (19) of the spindle stock (11). Two gripper arms (20, 20a) serve for transferring the toolholders (17) between withdrawal and/or loading positions (74) in the tool magazine (29), which are located on either side of the spindle stock (16), and a spindle position in a spindle nose (15) of the spindle stock (16). The endless path extends along a U shape, and a withdrawal or mounting position (74) is provided on each end (30', 30a') of the legs (30a) of the U. The spindle nose (15) is arranged in front of and below the ends (30', 30a') and rigidly connected with the tool magazine (29) in the direction of the axis (19).

Abstract: The machine tool exhibits a magazine and a tool changing device with two interconnected swivel-mounted transfer arms for tool changing. The magazine is disposed outside the range of the transfer arms on the side of an upright supporting the headstock, said side facing away from the headstock, whereby a conveying device to convey the tools from the magazine to the gripping elements of the transfer arms and back again is provided on both sides of the headstock.

Abstract: A toolholder is provided for a machine tool having a magazine containing several toolholders from which a selected toolholder can be taken by means of an arm and introduced in a working position in a rotating receiving means of the machine tool. An arm with a holding part that can be rotated via a pivot bearing in the direction of the shaft of the receiving means, is applied to the toolholder. In order to prevent the rotatably disposed toolholder from being carried along in its rotation during introduction into the spindle of the machine tool by the form-fitting coupling means of the spindle, without said coupling means engaging with the toolholder, braking means are provided which, during the introduction of the toolholder into the rotating receiving means, increase the frictional connection between the holding piece and the toolholder.

Abstract: A machine tool for sequentially machining workpieces with different tools which may be clamped in a spindle of the machine tool, comprising a magazine in which the tools are disposed in a ring pattern and held in holders such that the holder of the tool to be clamped in or unclamped and removed from the spindle is in alignment with the spindle axis during the tool change, is characterized in that the holders of the magazine are distributed about the spindle axis, that each holder is provided with its own drive which moves it into a position where it is aligned with the spindle axis (clamping position) and into a position outside the spindle axis (magazine position) and that the holder remains aligned with the spindle axis while the tool held therein performs a machining operation. This permits a very quick tool change.