Shotblasting machines with overhead conveyor are used for cleaning surface, removing casting sand and filings and consolidation the surface (microhandling), roughing the surface before colouring and shotblasting. On the basis of dimensions and weight of treated objects and size of manufactured series, the type of machine is defined. It can be: - Machine with rotating hook, where treated objects are transported to the machine via I, Y or circular conveyor. - Free-flowing machines with a rotating hook, where treated objects are transported to machine on a hanging closed conveyor. - Free-flowing machines with overhead conveyor, where treated objects travel on hanging closed conveyor through several technological procedures such as delubrication, shotblasting, colouring, etc.