Abstract: The bearing device consists of a hydraulic cylinder and piston unit mounted between two pivotally interconnected solids and a hydraulic circuit. The acceleration performances in the two directions imparted to the suspended mass supporting the grinding wheel are obtained by using a combination of suitable valve means controlling the hydraulic circuit and more particularly through the system for regulating the fluid pressure in one of the chambers of the cylinder which operates as a differential. The result thus obtained is a homogeneous removal of chips and an optimal exploitation of energying flaw-removing machines.