This little model engine was the Final Project from Machining class.
We used brass, aluminum, and steel. Class training involved both a metal lathe and Bridgeport milling machines with DROs to get parts to within .005” of tolerance.
We also got to train on how use edge finders and dial indicators to mill surfaces flat and square up rough cut pieces as well as taping holes for small screws by hand and by machine assistance.
Once assembled, we polished and sanded parts for smooth movement. Afterwards we ran oil through the whole set-up with air to lubricate in between the parts and test for weak connections.
And here is the finished product! Normally the surface is better polished but Covid so…here we are.