Spool Hub
thingiverse
If you have a 3D printer, designing your own spool hub is an option; I created one that accommodates an 8mm rod, specifically for my old Mendel-shaped desk inbox. The spool holds a 10 lb roll of filament, which requires wide holes on the plastic rings. To print successfully, ensure you pre-slack the machine beforehand.
Download Model from thingiverse
With this file you will be able to print Spool Hub with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Spool Hub.