VSL 250/300 by Antenore Visentin are the double rolling mills with four rolls situated horizontally. The quality rolls in chilled cast iron with high superficial hardness: 550-580 Hp. Grinding rolls supported by oscillating bearings with double cask rolls row. Shaft worked with taper and thread for the direct block of the conic bearings. Rolls motion transmission by a helical teeth couple of gears in partial oil bath and enclosed in aluminum fusion carter perfectly watertight, alternatively belt transmission. Certified CE, roller mill guarantee high hygiene and inside cleaning. The precise and stable micrometric regulation of rolls distance and parallelism obtained by rotating handwheel equipped with inertial indicators. Automatic pneumatic control with probe located on the feeding bell for the basis functions: approaching and releasing of the grinding rolls automatic start of the new conception supply group.