50 To 1 Planetary Gearbox For Nema 17 Stepper Motor Boosts Torque Fits 42 To 66 Mm Body Input Shaft 5 Mm Output Shaft 8 Mm Works With 22 To 25 Mm Shaft Length Plug And Play For Hobby CNC And Robotics Upgrades

50:1 Planetary Gearbox for NEMA 17 motor, single unit torque
✔️ 50:1 ratio; Ø5mm in; Ø8mm out; body 42-66mm; 235g

This 50:1 planetary gearbox is designed for NEMA 17 stepper motors, delivering high torque in a compact package. It's ideal for hobby CNC machines, 3D printers, and robotics projects where space is tight and precise motion matters.

✅ Backlash ≤ 20 arcmin
✅ Efficiency 94%
✅ Nominal output torque 10 Nm (1416 oz-in)
✅ Moment permissible torque 20 Nm (2832 oz-in)
✅ Nominal input speed 3000 RPM; Max input speed 6000 RPM
✅ Input shaft Ø5 mm; Output shaft Ø8 mm
✅ Body length 42-66 mm; Installation hole distance 31 mm
✅ Waterproof IP54; Working temperature -20°C to +150°C
✅ Weight 235 g; Lifetime 20000 h

💡 What is a planetary gearbox used for in automation and hobby projects?

Planetary gearboxes are handy reducers that multiply torque in a compact form.

- Increases torque density for tight CNC, robotics, and 3D printers
- Enables slower, controlled motion with higher precision
- Keeps backlashes low for repeatable results
- Works with standard NEMA 17 motors and 5 mm input shafts
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