Abstract: The invention relates to a removable electro-mechanical device for burnishing and smoothing metal parts, said device comprising: a tank (2) containing an electrolytic solution and the cathode (c); a main body (3) which closes the tank (2), and in which the electrical contacts (6), the mechanical components and the drive systems (5) are incorporated, said drive systems being located in the lower portion of the main body (3) and being vertically and radially secured to a part (7) such that, in addition, when said body (3) is coupled to the tank (2), they remain immersed in the solution; and a detachable head (4) that can be coupled to the main body (3) and includes an electric motor (14) linked to a rotating body (15) and a removable, coupleable, rod-shaped supporting structure (41) or anode (a) having securing means (42) for the parts to be treated, and being disposed in such a way that, when said head (4) is coupled to the main body (3), the parts remain immersed in said solution.