These heavy duty grinders are designed with and angled grinding chamber and almost level feeding hopper to allow the feeding of long parts of pipes and profiles. The specially angled rotor automatically pulls the fed pipes or profiles into the cutting chamber, this design also regulates the amount of material. The model with the wider grinding chamber 1.000 to 1.400 mm can be fitted with a special hopper specifically designed for the feeding of plastic pallets. The rotor bearings, blades support and rotor shaft are oversized to guarantee a long service life.