[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.

If they are different, the machine is cutting a taper, which means your bed has some twist. Adjust or shim the lathe’s tailstock-end feet a little bit and make another cut. A larger tail-end on ...

See how skilled lathe operators in a local factory transform rusted iron into precision spur gears. Witness the expert ...