Apparatus for the anti-rub of metal surfaces involved in the process for processing vegetables, flours and preferably for processing animal meat for producing sausages, including, in sequence along the axis (100), an actuation shaft (200), a loading hopper (70), at least one auger (1) adapted to transport the animal meat to be processed; at least one first knife (11), preferably a plurality of knives (11), rotary and arranged at the outlet of the meat from the auger (1); at least one first fixed drawing disc (3), the first disc (3) having a plurality of holes and having the actuation shaft (200) at least one cylindrical projection (300), arranged along the actuation shaft (200), provided with at least one circular bearing (40), preferably a pair of circular bearings (40) adapted to stabilize and reduce the forces acting on the actuation shaft (200).