[Maciej Nowak] demonstrates just how to produce your own gears with a homemade cutting tool. The cutting tool for the job is an M16 machine tap, chosen for the smaller flutes compared to a hand tap.

But where’s the fun in that? Here’s an easy way to cut your own keys using a CNC mill! [Bolsterman] now “works” for a real estate company that rents out various properties. Whenever ...