<p>The blade (1) has a saw tooth collar (2) comprising saw teeth (3) for removing plastic material. A centrally arranged transmission element (4) drives the blade by transferring necessary drive torque. The blade comprises openings (6a-6d) for supplying cool air to cool the plastic material in a cutting zone, where the openings form delimiting material edges (7a-7d) that are partially designed as flow edges. The openings are arranged to center of the blade in a point-symmetrical and / or axially symmetrical manner.</p>
