During the shot blast process the workpieces are constantly cascading over each other resulting in effective all-around blast coverage. The continuous contact between the workpieces accelerates the deburring process and/or the loosening and discharge of sand cores from sand castings. Up to three high-performance blast wheels guarantee homogeneous blasting results in extremely blasting cycle times, the endless belt can consist of high quality perforated rubber, or respectively, a hardened steel or manganese steel slat. Workpieces specific mixing strips. Either bonded on the rubber or welded on the slats ensure an optimized cascade action in combination with a selected belt speed.