This is a gear-shaped fidget spinner for use with a 608 ball bearing.
I borrowed and modified Braunbaer's screw-in caps from his fidget spinner.
Printed at .10 mm with 15% infill. No supports.
Edit:
I've also uploaded an earlier version that used a smaller R22 ball bearing. The R22s seem to spin faster/longer.
The author marked this model as their own original creation.