Abstract: Means for gripping and releasing tools and attachments used with a machine tool, especially a grinding machine equipped with a form grinding head, comprising a grinding wheel adaptor (22) a dresser roll cartridge (14) both provided with end compartments (25, 54) having a slot (35) adapted to be engaged by collet-type gripping apparatus (36) being part of maneuvering apparatus (37) also comprising a thrusting apparatus (40) adapted to selectively actuate locking apparatus (27) for the grinding wheel adaptor (22) on the spindle and locking apparatus for the dresser roll cartridge (14) on a movable support.

Abstract: Locking and unlocking device for cartridge-type tools used in a toolholder mounted on a machine tool ram comprises transmission apparatus (20) connected to control apparatus (24) and arranged to slide axially within a rotating block (23), said transmission apparatus carrying a pin (19) operable to selectively actuate any of several secondary plungers (12) slidably mounted in hydraulic cylinders (11) provided in the toolholder (3), said cylinders being connected via ducts (10) to hydraulic chambers (8) in the top of the toolholder, and said cartridge tools (6) being carried in hollows (5) therein.

Abstract: A device for mounting a turning or milling tool-holder on the slide of a machine-tool, wherein a sleeve is mounted for sliding inside the slide body, said sleeve receiving internally a rotary spindle, and being designed to occupy one position in which it is moved inwards of the body and in which the turning tool-holder is immobilized on the seat of the slide, by means of notchings or serrations, under the action of an axial force exerted by one of the ends of the spindle on the turning tool-holder, and another position in which said sleeve is moved out of the slide body and brought against a centering seat of said body, for which the milling tool-holder is mounted on the end of the spindle which is rotatable under the action of rotating drive means.