Planetary Gearbox for Nema17 Stepper motor

Someone wanted to build a small and light gearbox for a stepper motor and increase torque for a direct drive extruder.

By: Janth, Link: http://www.instructables.com/i...

Bill of materials:

- 3* bearings 3mm inner diameter, 7mm outer diameter, 3mm height.

- 1* bearing 5mm inner diameter, 10mm outer diameter, 4mm height.

- 3* 3mm hexagon socket head screw 12mm long, with 12 washer and 3 nuts.

- 1* 5mm hexagon socket head screw 30mm long (but trimmed down) and 3 nuts (small height).

- 2* 3mm hexgon socket head screw 40mm long with 2 washers.

- NEMA17 stepper driver (5mm diameter axis)..- MK8 drivegear for 5mm axis.