530:1 Planetary Reduction Gearbox for NEMA 14 Stepper Motor
thingiverse
I needed a high-reduction gearbox for my project, but couldn't find one online, so I decided to try designing one myself. The result was printed on a Creality CR10 at an extremely fine layer height of 0.06mm using PLA material. To my surprise, it actually works exactly as designed. The final assembly is just 6mm longer than a standard NEMA 17x38mm stepper motor. The design breaks down into modular stages, each with a gear ratio of 4.8:1, which can be customized for different ratios to suit various applications. For my specific needs, I used three stages and a .9 degree stepper motor. This resulted in an overall gear ratio of 110:1 with a precise step angle of 0.008 degrees. Printing the component in Nylon or PETG material will yield a usable and functional part.
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