Bowden extruder for 1.75mm filament and 1/8" push fit coupling (used for 4mm OD tubing)
thingiverse
I have reworked a version of Carl Feniak's extruder by increasing the size of the filament holes for use with 1.75mm filament and expanding the bore opening to accommodate a snug fit push coupler suitable for Bowden extruders. This is similar to the coupling I utilized: A "4mm OD tubing to 1/8" male thread - Quick connect for Bowden extruder tubing". I recently revised the push fit coupling's entrance hole, and now it perfectly screws onto my printer straight away. The filament path leading into this coupling has been angled as well.
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