Abstract: The present invention concerns a bore head, which consists essentially of a body (1) provided with a radial piston (2) for receiving a bore tool (3) which can be tightened in said radial piston (2) with a tightening means (4), where the position of said radial piston (2) can be regulated by means of a micrometric screw (5), and where the radial piston is guided and tightened in the regulation position with a guidance and tightening means, and where, moreover, said body is provided with a balancing device (7) with balancing weights (8 and 9). Bore head characterized in that the means (4) for tightening the bore tool (3) in the radial piston (2) of the body (1) is in the form of a screwing device (10), equipped with a movable center punch (11) which is under tension caused by a spring (12), and in that the means for guidance and tightening in the position of regulation of the radial piston (2) is an indirect tightening means which carries out said guidance and tightening radially.

Abstract: The present invention concerns a bore head, which consists essentially of a body (1) provided with a radial piston (2) for receiving a bore tool (3) which can be tightened in said radial piston (2) with a tightening means (4), where the position of said radial piston (2) can be regulated by means of a micrometric screw (5), and where the radial piston is guided and tightened in the regulation position with a guidance and tightening means, and where, moreover, said body is provided with a balancing device (7) with balancing weights (8 and 9). Bore head characterized in that the means (4) for tightening the bore tool (3) in the radial piston (2) of the body (1) is in the form of a screwing device (10), equipped with a movable center punch (11) which is under tension caused by a spring (12), and in that the means for guidance and tightening in the position of regulation of the radial piston (2) is an indirect tightening means which carries out said guidance and tightening radially.

Abstract: A boring head, essentially consists of a body (1) provided with a housing (2) for receiving two tool-holders (3), capable of being radially driven via a moving device (4), and of element (5) for locking the tool-holders (3) in operational position. The boring head is characterized in that the element (5) locking the tool-holders (3) in operational position consists of a single clamping device simultaneously acting on the two tool-holders (3) and on the body (1). The invention is more particularly applicable in the field of machine-tool accessories, in particular digitally controlled machines, of machining plants and adaptable cells and workshops.

Abstract: The invention concerns a boring head, essentially consisting of a body (1) provided with a housing (2) for receiving two tool-holders (3), capable of being radially driven via a moving device (4), and of means (5) for locking the tool-holders (3) in operational position. Said boring head is characterised in that the means (5) locking the tool-holders (3) in operational position consists of a single clamping device simultaneously acting on the two tool-holders (3) and on the body (1). The invention is more particularly applicable in the field of machine-tool accessories, in particular digitally controlled machines, of machining plants and adaptable cells and workshops.

Abstract: A hollow cone device for gripping attachments, essentially constituted by a bit-carrying socket (1) for blocking the member (2) to be fixed, prolonged by a securement element (3) in a support (4), such as a spindle or the like. The securement element is in the form of a screw-threaded element connected to the socket (1) and screwed into the support (4). The bit-carrying socket (1) comprises two radial recesses extending perpendicularly to its axis and in which are mounted two gripping bits (5) actuated simultaneously, to slide radially in a symmetrical manner, by a screw (6) maintained in translation by a stud screw (7) co-acting with a circular throat provided in the central region of the screw (6). An ejector (12) is guided in translation in a bore in the bit-carrying socket (1) and actuated by symmetrical pressure of the bits (5). The device also includes an element (15) for relative angular displacement between the bit-carrying socket (1) and the screw-threaded element.

Abstract: The present invention relates to a boring head constituted by a body (1) provided with a radial piston (2) for reception of a boring tool (3) gripped by means of a screw (4), said piston (2) being adjustable in position by means of a micrometric screw (5), characterized in that the body (1) is provided also with a slide block (6) effecting the guidance, the orientation and an end-of-movement abutment for the piston (2) for reception of the boring tool (3) and with a balancing device (7) with independent counterweights (8 and 9).