About this 3D model

Very compact, only 50x42x20mm !! Only one simple piece to print for the whole extruder !! This is a very simple extruder for NEMA17 motors. Designed for 3mm filament. I think a PTFE pipe to adapt 1.75mm is possible. You just need a brass insert (Like Adrian Geared Extruder) and a 608ZZ bearing (+ screw and nut). No springs, you have to adjust the pressure at the mounting of the motor.