Shot Blasting ---------
SHOT-BLASTING: Shot blasting consists of attacking the surface of a material with one of many types of shots. Normally this is done to remove something on the surface such as scale, but it is also done sometimes to impart a particular surface to the object being shot blasted, such as the rolls used to make a 2D finish. The shot can be sand, small steel balls of various diameters, granules of silicon carbide, etc. The device that throws the shot is either a large air gun or spinning paddles which hurl the shot off their blades. This process is being repeated during various stages of manufacturing of gear and shafts, so that the surface of the material is free from scale/ rust or any other foreign particles.