Meta blast tumblast machines are designed for batch operations. Appropriate loading and unloading devices can be used to integrate the shot blast machine into an existing production plant to create a continuous work flow. The loading device delivers the workpieces to the trough-shaped shot blast chamber consisting of a continuous rubber conveyor belt or a steel apron conveyor and adjustable lateral disks. Shot, burrs, flashes or scale and sand deposits are removed by the lower vibrating deck before the separator (optional on smaller machines). Belt speeds can be adapted to the tumbling behaviour of the workpieces, thereby allowing for individual dwell times during the blasting sequence. With the belt running in the reverse direction, the workpieces are unloaded from the machine to be placed in containers or on conveyor belts. Loading / unloading is aligned with production requirements