You know you’re in for a treat when you are told that a lathe which can reach a resolution of one micrometer (1×10 −6, a millionth of a meter, or 0.00004″ for people who love zeros ...

The angle grinder plays a prominent role in the build, as do simple tools like a hand drill, files, and a welder — and yes, the unfinished lathe itself, which was used to bore out the bearing ...