This model is outdated. Find the improved version with stand added in the Remixes tab or follow this link: https://www.printables.com/model/548173-improved-filament-roller-stand-freecad
Filament Spool Roller with 6000 bearings. Adjust width (RolleBreite) for your needs.
Print both halfs w/o support standing on the large diameter, they will snap together firmly. Adapters to fit on a 8 mm rod included.
The author marked this model as their own original creation.