Machine for the roughing, honing and polishing of metal frames. The barrel is made of wood with 1 or 2 compartments and it is equipped with 8 or 16 racks that can hold 496 frames in total. Each rack is moved by a geared motor reducer with a delayed start in respect to the barrel. The barrel is either available with fixed (17 RPM) or adjustable (from 1 to 34 RPM) speed. The working cycle is timed and equipped with a safety device which stops the rotation and notifies in case a part of the frame has fallen down from the hooks.
