| 摘要 |
<p>The disk (1) has middle recess and a drive shaft (6) fit the disk to an entrainment unit (7) along a rotational axis (8), where circumferential cutting edge formed on outer circumference at outer periphery of the edge. The middle recess is formed as a non-circular central recess such that the disk is rotatably fixed on the drive shaft after mounting on the entrainment unit. The middle recess is in oval or ellipse shape. The disk is made of metal, tool steel or tungsten carbide and/or ceramic.</p> |
