Ender 3 Filament Guide Bracket
thingiverse
Remix of @Holspeed's outstanding Filament Roller Guide has been adapted to incorporate 604 bearings, identical to these from Amazon: https://www.amazon.com/gp/product/B01M2CSJE4/. This modified design requires an M4x16 screw to secure the bearing firmly in place. The rear hole measures 4mm in diameter, while the front hole is a precise 3.3mm, allowing you to easily drive the screw from the back without needing any additional fasteners.
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