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.