Ender 3 Filament Spool Bearing

thingiverse

This design won't accommodate every spool size, which is why it's designed as a removable part. With the standard 608 bearings used in most fidget spinners, this is the shortest version possible. These bearings are commonly found around the house if you have kids. To assemble this spinner, add the 608 bearings to the shaft. It's best to print each piece separately without supports. Print the shaft with a brim for added stability. Then, use hot glue to attach the bearings to the shaft. For the roller, you can choose either to glue it directly or use rubber bands to keep everything removable. Four rubber bands are sufficient, but when you have a stash of them, it's easy to get carried away!