Blasting machines with overhead conveyor have a shotblasting cabin of suitable dimensions, internally lined with wear-proof material. The turbines are distributed on both lateral side walls; the number of turbine wheels depends on the height of the cabin. The cabin is equipped with vestibules with rubber curtains to permit the continuous passage of parts. The pieces are transferred by a linear monorail conveyor or a closed loop overhead conveyor. The closed loop conveyor can transfer the parts from blasting machine to the painting booth. The shotblasting machine can be equipped with also a blasting room for manual retouch.