🪐 2-Stage Planetary Gearbox (16:1) for NEMA17
This is a compact and durable 2-stage planetary gearbox designed specifically for NEMA17 stepper motors. It provides a 16:1 gear reduction, significantly increasing torque while maintaining good precision and smooth operation.
The design is optimized for FDM 3D printing, with tolerances adjusted to ensure reliable performance without post-processing (though light cleanup can improve results).
⚙️ Specifications
- Gear ratio: 16:1
- Motor compatibility: NEMA17
- Type: 2-stage planetary gearbox
- Module: 1.0
- Planets per stage: 3
🔩 Hardware Required
- 8× bearings (10×5×4 mm)
- M3 heat-set inserts
- M3 screws
All components are designed for easy assembly and solid mechanical alignment.
🛠️ Assembly Notes
- Press-fit or gently install the bearings into the planet gears
- Use M3 screws as shafts for the planet gears
- Install heat-set inserts for durable threaded connections
- Ensure smooth rotation of each stage before final assembly
- A small amount of grease is recommended for quieter operation
🧩 Features
- High torque output thanks to 2-stage reduction
- Compact and efficient design
- Fully 3D printable structure
- Designed with proper backlash for reliable operation
- Easy to assemble and maintain
🧪 Printing Tips
- Recommended material: PETG (PLA also works for light use)
- Layer height: 0.15–0.2 mm
- Use good cooling for clean gear teeth
- Light sanding or cleanup of teeth can improve performance
Domino
