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UMO compatible friction less spool holder
This is yet another spool holder, compatible with Ultimaker original.
It uses 2x 8x16x5 bearings, M8x150 mm bolt and some printed parts. By printing 2 sets of cone centering parts, you will be able to use it for 2 type of reels: narrow reels with ID up to 70 mm and wide reels with ID 50 mm. I found these two common types of spools when ordering plastic from European suppliers.
Check BOM for parts list.