Ball Bearing Spool Rollers
thingiverse
Spool Rollers - using ball bearings to provide near frictionless spool rotation. Mounts to a 30mm spool holder (Creality and others in that size range) Uses 5x10x4 mm ball bearings common in most radio control cars, and M3 countersunk screws. M3x6 CSK recommended. Fit ball bearings and cable tie to spool holder arm in required position. You may find it easier to pre tap holes to suit your bolts, but M3 should be fine to cut their own thread in PLA. Used successfully on Creality Ender 3
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