Hanger type shotblasting machines have a cabin of suitable dimensions, internally lined with wear-proof material. The turbines are placed on one of the two side walls; the number of turbine wheels depends on the cabin dimensions. The room has a double hinged door from which the pieces are transferred. The pieces are hinged on hook (directly or through an holder) and moved by a trolley (manual or motorized). Once entered in the cabin, the hook can swing in several positions and rotate through a rotating system placed on the roof of the cabin. This double movement allows the best coverage of the blasting process. The trolleys move along a beam that can be straight (in this case there is only one hook) or Y shaped (in this case there are two hooks).