The manufacturer's plate says 350, and I'm guessing it's original. I'd say definitely not homemade, because the casting is gigantic. I don't know if it's really visible, but there's an almost equally large cylinder that runs horizontally. I'd like to see how that works, Mike says he's never used it. Andy What size motor does it take to drive that thing? I am assuming that 3 Phase is being used for the power end of things? Mark