Gap or Continuous Machining for High Volume or Sensitive Workpieces RMBC Crawler Shot Blasting Machine This crawler shot blasting machine is particularly suitable for high volume machined workpieces that can be turned over, regardless of the material of which the workpieces are made. From any small workpiece, precision plastic workpiece to large forged workpiece can meet the highest processing technical standards. The gap machining system can be expanded into a fully automatic system along with the peripheral feeding and unloading devices.