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Another difference between a sand blasting machine and a shot blasting machine is the type of
material used. A sandblasting machine utilizes a motor to propel an impeller. The shot is then
collected by the recovery system and returned to the propelling device. This process is faster
and more efficient and has quick time cycles. On the other hand, a shot blasting gun uses small
steel or iron shots to clean the surface of a workpiece. It also increases surface hardness by
removing any surface contaminants.