Extruder motor planetary gearbox

This is a 4.36:1 planetary gearbox intended to be inserted between your NEMA 17 extruder motor and your extruder mechanism. This allows you to use your existing Airtripper or similar extruder and your MK7 drive gear with a 5mm bore, yet still insert a gear reduction so your motor doesn't overheat.

This design is based on my custom gearhead extruder, but I have extracted just the gear reduction mechanism and given it a face mounting plate which should allow you to mount it to your existing ex