Fidget Spinner / Hand Spinner

sketchfab

The purpose of their creation was to assist children who suffer from Attention Deficit Disorder and Autism. A basic Fidget Spinner consists of three arms with rounded edges. The magic lies in the fact that they have a bearing in the center and three counterbalances at the ends. These latter ones rotate in the opposite direction to the central bearing. With this combination, the entire device's rotation is prolonged for minutes. Stiff bearings made from a line of balls for Skate, Longboard, roller skates, and Fidget Spinner OD: 22 mm ID: 8 mm Width: 7 mm https://grabcad.com/library/fidget-spinner-hand-spinner-1