Fidget spinner with 1/2 inch bearings

created in Tinkercad. It is a simple design that is great if you do not have small hands. It has a nice weight to it and enough mass for a decent spin.

a common 608 skate bearing is used in the center. The outer bearings are nine (9) 1/2" stainless ball bearings. Mine measure 12.67mm and the hole is designed to be tight at 12.7mm. I press fit carefully with the bearings heated up. I used my toaster oven, be very careful they are hot and will burn you. The center bearing snapped in