Nema 17 16:1 Gearbox

thingiverse

I designed this gearbox to fit onto a NEMA 17 stepper motor, allowing it to be mounted in the same location as a standard NEMA 17. [](https://www.youtube.com/watch?v=87yFGr4fGRY) The video above shows the gearbox in action and provides assembly instructions. Click on the image to view it. Alternatively, written instructions are available here: https://www.instructables.com/id/3D-Printed-161-Nema-17-Gearbox/ This allows you to increase torque in many applications without redesigning the machine. It features three pairs of 12-tooth gears turning 30-tooth gears, resulting in a 0.4 ratio reduction per pair. With three reductions, the overall gearbox ratio is 15.625:1. This means every 15.625 motor revolutions, the gearbox shaft will rotate once. Supplies needed: You'll need: 3D printed parts NEMA 17 Stepper Motor Two MR105-ZZ bearings (5x10x4mm) Seven M3 Nuts Two 6mm M3 Screws Two 10mm M3 Screws Two 25mm M3 Screws M3 Grub Screw Fifty millimeter or longer M5 Bolt with Hex Head Two M5 Hex Nuts CA/Super Glue