Cycloidal Drive 1:20

3D Printed Cycloidal Gearbox – Detailed Assembly Guide Overview This project is a fully 3D printed cycloidal gearbox designed for compactness, durability, and smooth torque transmission. The design utilizes standard hardware components such as M3 screws, threaded inserts, and ball bearings to ensure structural rigidity and reliable operation. Gear ratio: 1:20, making this gearbox ideal for applications requiring high torque and reduced output speed. The gearbox is optimized for makers who want a precise and robust reduction mechanism using accessible components and additive manufacturing. Required Components Hardware 6× threaded inserts (for the output ring) 2× threaded inserts (for the shaft) M3 screws (length: 20 mm) 3D printed spacers (bushings) for M3 screws Bearings 4× ball bearings (10 × 19 × 5 mm) – mounted on the shaft 2× ball bearings (45 × 58 × 7 mm) – mounted in the outer ring 3D Printed Parts Cycloidal disc(s) Output ring Outer housing Shaft Spacers (bushings) Assembly Inst