Abstract: The present invention relates to a machine tool, in particular a lathe, comprising a machine frame 1 having a first carrier side TS1 and a second carrier side TS2, wherein the machine frame 1 includes a first carrier portion 1a, a second carrier portion 1b and a middle carrier portion 1c which is arranged between the first and second carrier portions, a first spindle carrier 31 which is arranged on the first carrier side TS1 of the first carrier portion 1a and which holds a first work spindle 21, a first spindle carrier slide 42 which is arranged on the first or second carrier side of the second carrier portion 1b and on which a second spindle carrier 32 is arranged which holds a second work spindle 22 facing the first work spindle 21, wherein the spindle axes are aligned in parallel, in particular coaxially, and wherein the second spindle carrier 32 can be moved in direction W parallel to the spindle axes, and a second tool carrier slide 52 which is arranged on the first carrier side TS1 of the middle portio

Abstract: The present invention relates to a machine tool, in particular to a lathe, comprising a machine frame 1, a first work spindle 21 which is arranged on a spindle carrier face of the machine frame 1 and is to receive a first workpiece W1, a second work spindle 22 which faces the first work spindle 21, is arranged on a spindle carrier face of the machine frame 1 and is to receive a second workpiece W2, the axis of the second work spindle 22 being aligned parallel, in particular coaxially to the axis of the first work spindle 21, and comprising two movable tool carrier slides 51 and 52, on which a respective tool-carrying tool carrier 61 and 62 is arranged. According to the invention, provided between the work spindles 21 and 22 is a tool carrier 62 which can be moved transversely to the spindle axes, is configured as a tool turret and the turret axis of which is aligned transversely to the spindle axes.

Abstract: The present invention relates to a machine tool, in particular a lathe, having a machine frame 1, a first work spindle 21, arranged on a face of a first carrier portion 1a of the machine frame 1, for receiving a first workpiece W1, a second work spindle 22, facing the first work spindle 21 and arranged on a face of second carrier portion 1b of the machine frame 1, for receiving a second work piece W2, the spindle axis of the second work spindle 22 being aligned parallel to, in particular coaxial with, the spindle axis of the first work spindle 21, and two displaceable tool carrier slides 51 and 52 on each of which a tool-carrying tool carrier 61 or 62 is arranged. According to the invention, a third tool carrier 63 is provided which is displaceable between the work spindles 21 and 22 transverse to the spindle axes and which is arranged on a tool carrier face WTS3 of a central carrier portion 1c positioned between the first and the second carrier portion 1a, 1b.

Abstract: A piece-threading device on a numerically controlled lathe comprises a supporting assembly having an inner rotatively driven body which, on a side thereof facing a workpiece to be threaded, comprises a plurality of threading tools, the rotatively driven body having a built-in electrical rotor (9) to which an electric stator (8) also built-in in the supporting assembly is operatively coupled, the stator (8) having a plurality of circumferential channels (6) for circulating therethrough a refrigerating and lubricating fluid.

Abstract: A multiple-spindle turning machine has an upright structure supporting a rotary drum which, in turn, supports a plurality of workpiece supporting spindles. On the upright, at each spindle, a cross slide adapted to support a plurality of machining tools to be used for machining the front portion of a workpiece is provided. The machine tool further comprises, in front of the rotary drum, parallel guides which are arranged crosswise of the machine bed, on the guides being slidably mounted two slides each including a workpiece supporting spindle. On the two sides of the machine tool, near each spindle, a vertical slide adapted to support a plurality of machining tools for machining the rear portion of the workpiece is arranged.

Abstract: Clamping device for fixing a spindle sleeve (2) on the carrying platform (1) of an automatic machine tool by interposing a concave carrying slide (3) and using clamping strips (5) which are arranged laterally with respect to the spindle-carrying sleeves and are inserted into a corresponding recess (4) of the spindle-carrying sleeve (2) and secured by means of screws (5a) on the associated slide (3). The spindle-carrying sleeve (2) is moreover secured on the associated slide (3) by means of screws (2a) provided inside threaded holes (9) along the center line on the bottom of the concave slide (3). Adjusting devices (8) are arranged in retaining strips (6) for fixing the concave slides (3) on the platform (1).

Abstract: Toolholder for an automatic lathe, in which the body of the toolholder has on its bottom side a projecting rib extending parallel to the axis (X) of the workpiece to be machined and the projecting rib may be coupled with a groove formed in a retaining support of the machine and oriented parallel to the axis of the workpiece, wherein moreover the retaining support receiving the toolholder has parallel grooves which are oriented radially with respect to the axis (X) of the workpiece to be machined and wherein strips can be inserted in these grooves, with which screws can be engaged for clamping the toolholder.

Abstract: A clamping device for locking the workpiece-carrying collet of an automatic machine tool has a spring made of flexible plastic material. The spring has a flat elasticity characteristic and cooperates with an adjusting nut and an indicator nut. Pivotable closing levers that cooperate with a profiled abutment sleeve are also provided.