will be recycled after being cleaned the sand will be used to produce the next casting three minutes later the mega diesel crankcase is roughly clean it's next stop is the shot blasting chamber where the crankcase will be bombarded with a storm of tiny steel pellets [Music] these are the steel pellets they're made of ordinary steel and have a maximum diameter of 2.5 millimeters so we can roughly estimate what the surface will look like afterwards and how clean it will be millions of the steel pellets are fired