Planetary Gearbox Nema 17 1:16

🪐 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