Heat and pressure are required to forge steel, and lots of both. We all know that a forged crank is stronger than a cast crank and the reasons have to do with the grain of the material and the density of it. Both of these traits are influenced by the process in which the crankshaft is made, ie cast vs forged. In this video you’ll see what looks like a straight 6 crankshaft of some kind being forged and the process is pretty cool to see. These machines are huge and we’re sure you don’t want to touch any of them for fear of being burned or squashing a finger like none other.

Watch the video to see how it’s made.