Hand Spinner Fidget With Ball Bearings

I designed this fidget toy to reduce the number of bearings needed compared to similar designs. I used a cheaper 22mm double shielded bearing at the center. I removed the shields with a pick (be careful) and cleaned it out with brake cleaner and compressed air. This increased the spin time from 10-20 seconds to over a minute.

I chose to install a 5/16" thumb nut and button head cap screw through the center bearing. The added standoff distance helps keep your hands clear when spinning and allows for placing the spinner on a flat surface and really get it moving.

I used 3/8" diameter ball bearings for the outside weights. The model is sized at .018-.019" oversized for the bearing and balls as my prints typically shrink that amount. Scale as needed for desired fit. When I printed the bearings and balls pressed in by hand with an audible click.