Compact Bowden Extruder 4mm Idler arm with lever
thingiverse
Billies idler arm was modified for a major upgrade on mokash770's extruder frame. Additionally, the hole for the M3 screw head was enlarged to accommodate a washer. The lever design was revamped with a larger, angled component to create more space between it and the filament entering the extruder. An M5 bolt up to 12mm with a washer is used to secure the bearing, or you can print the push-fit retainer inspired by https://www.thingiverse.com/thing:287287.
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