20:1 Planetary Gearbox For Nema 17 Stepper Motor, 42 To 66mm Body, Backlash 20 Arc Minute, 5mm Input Shaft, 25.5mm Length, 8mm Output Shaft, Planet Reducer For 42 Step Motor, Includes 4 Screws 2 Plugs 1 Key For CNC And 3D Printer DIY

High-Torque 20:1 Planetary Gearbox for NEMA 17 Motors
✔️ 20:1 ratio, 5mm input, 8mm output, body 42-66mm, includes 4 screws

This compact planetary gearbox is built for NEMA 17 stepper motors and is ideal for CNC, robotics, and DIY projects where torque and precise positioning matter. It accepts varying shaft lengths and delivers smooth, reliable power in demanding environments.

✅ Ratio 20:1
✅ Input shaft Ø5 mm, length 25.5 mm
✅ Output shaft Ø8 mm, length 21.5 mm
✅ Body length 42-66 mm
✅ Backlash ≤ 20 arcmin
✅ Efficiency 94%
✅ Nominal output torque 12 Nm
✅ Max input speed 6000 RPM
✅ Radial 300 N, Axial 100 N
✅ IP54, -20°C to +150°C
✅ Weight 235 g

💡 What is a pillow block bearing used for in precision drive systems?

- Pillow block bearings support rotating shafts and help maintain alignment in machinery.
- Handy in CNC, robotics, and DIY projects where steady motion matters.
- They allow mounting and lubrication, and can tolerate small misalignments under light to moderate loads.