Ender 3 Ball Bearing Filament Guide
thingiverse
This device guides filament smoothly into the extruder of your Ender 3 with the assistance of a ball bearing. Hardware - A 608 bearing, oiled instead of greased, will spin more freely - A 5/16 or 8mm bolt and nut (or printed substitute) - Two printed spacers to keep the outer bearing race free
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