Self-centering vise

A self-centering vise comprising a body, two or more jaws constrained to the body and actuators of the jaws,

• wherein the jaws are movable with respect to the body, on a lying plane of the jaws, close to and away from a workpiece gripping axis, to clamp a workpiece on said workpiece gripping axis and to release the workpiece, in response to the stresses imparted by said actuators, and;
• characterized in that
• each actuator comprises a thrust element susceptible to displacements parallel to the lying plane of the jaws in response to the stresses imparted by a fluid fed to the vise, and
• each jaw comprises two guides inclined and symmetrical with respect to a displacement direction of the jaw, and
• said thrust element comprises two walls inclined and symmetrical with respect to a displacement direction of the same thrust element, and
• each actuator exerts its own thrust simultaneously on two of the jaws by slidingly engaging the guides of the two jaws with its own inclined walls.