Projection Spot Welding Machines are perfect for the projection welding processes. Projection welding process is a variation of spot welding. These machines are widely used for the assembling of nuts as well as bolts. They are suited for the welding of shopping carts and steel wire. In addition, these are used for other industrial applications. Projection Spot Welding Machines are preferred for the welding of thick materials. These allow the deepest machine parts to fit within the machine throat.