RepRap Universal Mini Extruder by adrian-bowyer

Last crawled date: 2 years, 12 months ago

This printable extruder is intended to work on RepRap Mendel (both standard and Prusa), RepRap Huxley, and virtually any other open-source 3D printer you can find.
It features:
1.75 mm filament
Adaptable mounting plate to attach it to virtually any 3D printer
Very compact high-torque NEMA 11 motor
Active ducted fan cooling for high reliability
Wade-style hobbed bolt filament transport
Wing-nut drive to spread the torque loading on the plastic gears
Push-fit hot-end parts - no thread cutting
Easily replaced PTFE liner for the hot end
A single M3-threaded rod cut to lengths makes all the fixings
Lightweight: 420g
Compact design (110 mm x 90 mm x 80 mm)

I based this design (loosely) on Jstkatz's extruder (http://www.thingiverse.com/thing:7037), in particular, the idea of using a lever to trap the filament against its drive.