5 To 1 Planetary Gearbox Reducer For Nema 17 Stepper Motor 42 40mm Body With 15 Arcmin Backlash 10.8mm Input Shaft 5mm Diameter And 8mm Output Shaft 21.5mm Length Fits 86 Step Motors Includes 4 Screws 2 Plugs 1 Key For CNC 3D Printer Lathe

5:1 NEMA 17 Planetary Gearbox Reducer for Stepper Motors
✔️ 5 mm input shaft, 8 mm output, 42x40 mm body, 15 arcmin

This compact planetary gearbox reducer fits NEMA 17 stepper motors and is ideal for CNC routers, 3D printers, and small lathes where precise torque at low speeds is needed.

✅ Backlash up to 15 arcmin
✅ Nominal output torque 9 Nm (1274 oz-in)
✅ Efficiency 96% or higher
✅ Max input speed 2000 rpm
✅ IP54 rated
✅ Lifetime 20000 h
✅ Input shaft 5 mm diameter, 10.8 mm long
✅ Output shaft 8 mm diameter, 21.5 mm long
✅ Body size 42x40 mm, weight 235 g

💡 What is a planetary gearbox used for in CNC machines and precision motion control?

This handy device boosts torque at low speeds while keeping control tight.

- Handy torque boost for high-load, low-speed drives - Improves positioning accuracy in CNC and 3D printers - Helps extend motor life in demanding setups