This is a 5:1 gearbox designed for the NEMA-17 stepper motor. Some hardware is required, but the main part is printed. See photos provided for assembly or give me a comment on any issues you are having. I am happy to fix any model issues or provide help/insight.

Hardware needed:

3X 6mm Outer diameter, 3mm inner diameter Ball Bearing

2X 32mm Outer diameter , 20mm inner diameter Bearing

4X 40mm 3M bolts/nuts: 5mm Socket Head

3X 10-12mm 3M bolts/nuts 5mm Socket head

3X 3M bolt holes are provided to connect the output to what ever you wish to drive