11-to-1 NEMA17 hypocycloid reducer

thingiverse

Inspired by chriswal's innovative Nema 17 Cycloidal Gearbox prototype, I decided to push my skills further and design a working hypocycloid reducer for a Nema17 stepper with an impressive 11:1 ratio. Building on Otvinta's tutorial as a foundation, I scaled up the model to perfectly fit the frame of my Nema17 motor. The eccentric input shaft is largely inspired by chriswal's design, while I carefully modeled all parts in Blender and Fusion360 from scratch. After printing the first prototype in PLA and assembling it, I was thrilled to find that it not only worked flawlessly but also displayed minimal play or backlash. To achieve this level of precision, I applied a thin layer of PTFE grease to lubricate both the gear and output. To replicate my experience of success, you'll need: - 2 high-quality 608 bearings, - An M3 nut and an M3x5mm set screw for securely locking the input shaft to the stepper motor. - A sturdy M5 hexagonal head bolt for the output.