Brake device and manufacturing method

The system has a servomotor (1) with a cylinder (10) defining a pneumatic envelope. A master cylinder (5) is fixed with the cylinder (10) by plastic deformation of a vent (9) encircling a central orifice, extending outside the envelope and penetrating in an orifice of the body (14) of the cylinder (5). The cylinder (5) has a clamping plate (6) extending outside the body and supporting against a plane surface of the cylinder (10). An independent claim is also included for a method of manufacturing a braking system.