1:4 reduction gear assembly from my project i'm designing. It's a compact, clever way of mounting Nema 17 stepper motor below a turntable that uses a lazy susan bearing. gear should slide onto the motor shaft with no need for glue or screws. I made a demonstration video of how all of it is put together. Note that the project is unfinished and i already opted out for a different bearing type so it's not all finished although the gears themselves work very smoothly.