Filament rollers using 608ZZ bearings

thingiverse

Filament roller designed to match Rubbermaid's 21-cup container perfectly. It relies on four precision-engineered 608ZZ bearings to ensure smooth operation without any additional support from screws or other components. To enhance durability, I've incorporated M3 bolts and nuts into the design, but with sufficient infill density in the bridges, this reinforcement may not be necessary.