Abstract: Part holding device for holding a part (1) while it is being machined, having: a resting surface (2), one or several mobile flanges (5) for pinning said part against the resting surface when the flanges rest against the upper side of said part, the flanges being capable of being raised when the part (1) is inserted and extracted, one or several mobile jaws (3, 30) in a plane (X-Y) parallel to said resting surface in order to hold at least one portion (11) of said part by its lateral sides (16).

Abstract: Device for coupling in a reproducible position two coupling elements, comprising a first coupling element (2) and a centering plate (4), the centering plate (4) being designed to be fastened to a second coupling element (3), the first coupling element (2) comprising at least one peg (21) comprising at least one spherical portion, the centering plate (4) comprising at least one hollow portion (41) working with the peg (21) during the coupling of said second coupling element (3) to said first coupling element (2) so as to determine the position of said centering plate (4) relative to said first coupling element (2), and equipment for pre-adjusting machine tools comprising this device.

Abstract: Device for coupling in a reproducible position two coupling elements, comprising a first coupling element (2) and a centering plate (4), the centering plate (4) being designed to be fastened to a second coupling element (3), the first coupling element (2) comprising at least one peg (21) comprising at least one spherical portion, the centering plate (4) comprising at least one hollow portion (41) working with the peg (21) during the coupling of said second coupling element (3) to said first coupling element (2) so as to determine the position of said centering plate (4) relative to said first coupling element (2), and equipment for pre-adjusting machine tools comprising this device.