Filament spool holder
thingiverse
A stable filament spool holder, compatible with or without a spool, features ball bearings and can be constructed using aluminum t-slotted profiles (20x20mm with 6mm slots). Print the bearing housing for a snug fit of 624-bearings. You may opt to print your own spool holder (suitable for 38mm diameter spools) or use an aluminum "propeller" along with four printed holders. Additional details can be found on http://www.multec.info.
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