Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Sorta like the earlier piece in the video, but not quite. I think it’ll be fine. Still not understanding how the shaft you chuck in the drill spins the bearing and releases. I understand the one way bearing. What I don’t understand is what makes the shaft he is holding turn the bearing, and if the stub is fixed to the inner bearing, so it’s attached, how do I free the drill motor once it’s running? My thought was that the stub ends up secured in the chuck and free of the engine once running, but I can’t see how the stub drives the bearing and gets loose.