When printing a spool winder, I was wondering if I could print the ball bearings as well.

I had some 6mm plastic softair BBs lying around anyways. But I did not find any models for a 608 ball bearing using 6mm BBs.

So I designed this myself. It is made to print just right on my bambu x1c with a 0.2mm nozzle.

For any adjustments, I included the step and the f3d files. It should be fully parametric, so you can basically change the ball diameter to anything you got, between 1mm to 6mm. Tested it with 4.5mm pellet gun BBs as well.

22mm outer diameter

6 inner diameter

7mm hight

7x 6mm Softair BBs needed