Fidget spinner adapter - 12 mm and 14 mm ball to 608-2RS

This is a simple adapter piece to fit a 12-mm steel ball or 14-mm glass ball into a 22-mm diameter slot.

Many of the fidget spinner models utilize 608-2RS ball bearing as a weight around the center. With the help of this simple adapter you can quickly fit steel or glass balls to various fidget spinner models you can find.

Steel ball model:
kuula-adapteri_12mm_to_22mm_R1p5mm_loose_outer_dia.STL
kuula-adapteri_12mm_to_22mm_R1p5mm.STL

The outer diameter is smaller in the first model. Print some of both types and you'll always have some adapters that fit your newly-found spinner model.

Glass ball model:
kuula-adapteri_14mm_to_22mm_BIG.STL
kuula-adapteri_14mm_to_22mm_MEDIUM.STL
kuula-adapteri_14mm_to_22mm_SMALL.STL

These models are probably less usable because glass balls are various sizes. My balls were roughly 14 mm in diameter. However, the tolerance of the glass balls was not same level as that of the steel balls. I ended up using 3 different color-coded models so that I always could can find the adapter that fits a certain glass ball.