In present systems, the product which passed from between feed roller and feed curtain is gone to the grinding area. In normal conditions, none-request materials (bolt, metal bits etc.) within the product are being tried to prevent with magnetic mechanism into inlet lantern (product inlet). Because of various reasons, none request materials are hindered entry to the grinding area for preventing from probable damages in this conditions like these not connecting, not working regularly of magnetic mechanism. Additional safety system is in areas of feed rollers. This system is not exist in similar machinery. Private Safety Apparatus has been fixed in such a way that this private safety apparatus doesn抰 hindered to the product flow. Thus, none-request materials which went along products flowing are hindered to entry of the grinding area.