Easy mounting on tractores with hydraulic system on 3 point linkage and 540rpm in PTO; with type I and type II link pins. Side chain transmission in oil bath, with level check, automatic adjuster (JF.0D) and gears adjustment (JF-1D). The rotor carries 4 blades for each flange (JF-0D) and 4 or 6 blades (JF-1D). L type curved blades, highly resistant to shock and wear. Rear sliding cover for soil crushing adjustable by chain or springs. Adjustable skids for depth control. Side shifting by crank.