Driver for electromechanical brake caliper piston, comprising a non-friction face

An electromechanical disc brake comprising a brake caliper comprising a single-piece caliper body comprising a housing enclosing a piston and a mechanism for moving this piston, the housing and the mechanism for moving the piston being configured to be immersed in hydraulic fluid, said mechanism for moving the piston comprising a drive member and a socket, said drive member being screwed into the socket, said socket carrying a ring for locking said socket with respect to rotation with respect to the piston, the ring extending axially along the socket, the socket and the ring being situated in an internal space delimited by the piston, said drive member comprising a threaded body and a head comprising a bearing face bearing against a bottom of the housing, and wherein a non-friction thrust bearing element is interposed between the bottom of the housing and the bearing face.