Ender 3 Filament roller
thingiverse
I built a custom filament roller for my Ender 3 printer. I chose 624ZZ U-groove bearings for maximum stability. To keep the bearings snug, I used shorter M4 bolts on one side and longer bolts on the other to accommodate varying filament widths. For the stationary side, I needed two M4 bolts measuring 15-18mm each. For the moving side, I opted for two 30mm M4 bolts that provide extra leverage. To support the bearings, I selected four 624ZZ U-groove bearings. Two M5 bolts and matching washers were used to secure the filament roll holder parts, which came from the Ender 3's original package.
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