Pusher-drawer single shaft grinders. Machines studied for the grinding of materials with high thickness and cutting endurance, such as plastic blocks and plates, different types of wood, paper, extruded polymer tubes, etc..
A hydraulic drawer pushes the material against the rotating tools-holder which performs the pre-rupture and the grinding. In case of overloading, the rotor and the drawer automatically reverse the movement to release the material and avoid structural overloads. At the end the material is screened by a perforated grate to determine the final size of the ground material.