I had a little bench top horizontal mill that had little handles that fit onto 3/8" squares on the ends of the lead screws. perfect fit for a bbq spit motor I had. It worked ok and was very small. It did burn out after a while, but the thrift stores always seemed to have a bunch of those...
(caused some alloy in the bronze to "boil up") That was likely zinc. They no longer make pennies out of copper, they are zinc with a light copper plating. or maybe I'm mistaken and that's not a penny in the photo
This is an awesome project. I some how stumbled on what I'm guessing is your weebly site looking for some plans for something. Managed to find this place. I've been fascinated by the Quadricycle and the mercedes-benz daimler motor carriage since I was a kid. Well that and muscle cars. Thank you...