Bowden extruder based on compact extruder
thingiverse
For a compact 1.75mm filament extruder on your 3DR delta printer, choose between 40 or 48mm-long steppers in two available versions. Print essential parts including the idler, small and large gears; obtain sources for these. An MK8-like hobbed bolt is necessary, along with one 608ZZ and two 625ZZ bearings. Two springs, two 40mm M3 screws, and two M3 bolts are also required. Motor installation needs two 8mm M3 screws, plus two nuts and a 60-ish mm M5 rod. Secure the extruder to your 20x20mm extrusions with M4 bolts.
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