Another bowden geared extruder for my Prusa Steel that uses a hobbed socket bolt for avoid the erosion of the 3mm filament. The original file is this: http://www.thingiverse.com/thing:60531. The gears used are the common greg's wade extruder ones. Check out the size of the tube connector hole before print this thing.

Instructions

This video inspired me for build the hobbed bolt. https://www.youtube.com/watch?v=gLP_OmY7iTY

Category: 3D Printer Extruders