100 To 1 Planetary Gearbox For Nema 17 Stepper Motor, 42 To 66mm Body, 25.5mm Input Shaft, 8mm Output Shaft, Low Backlash 20 Arcmin, Ideal For CNC And 3D Printer DIY Reducer, Includes 4 Screws, 2 Plugs And 1 Key

Single-Unit 100:1 Planetary Gearbox for NEMA 17 Motors
✔️ Input 5mm shaft; 25.5mm; output 8mm; 21.5mm; body 42-66mm

This compact planetary gearbox provides high-torque, low-speed drive for NEMA 17 motors, perfect for CNC builds, 3D printers, and precision robotics. Includes mounting screws, plugs, and a key for immediate mounting.

✅ 100:1 gear ratio for high torque at low speed
✅ Backlash ≤ 20 arcmin for precise motion
✅ Nominal torque 5 Nm; peak 10 Nm
✅ Efficiency ~94% for cooler operation
✅ Input speed 3000 RPM nominal; 6000 RPM max
✅ Input shaft 5 mm; output shaft 8 mm; lengths 25.5 mm & 21.5 mm
✅ Body length 42-66 mm; hole spacing 31 mm
✅ IP54 waterproof; operating -20 to 150 C; weight 235 g
✅ Includes 4 screws, 2 plugs, 1 key for easy mounting

💡 What is a planetary gearbox used for in CNC and 3D printer setups? This handy drive boosts torque and smooths motion for precise control.
- High torque at low speeds improves accuracy and smoothness - Low backlash supports tight tolerances - Compact form factor fits into small tool heads and enclosures - Durable gear train offers long life in DIY projects