R188 (1/2 in) Bearing Adapter

thingiverse

I had a 1/2 in bearing laying around that I wanted to use for a fidget spinner, but most of the designs I found were for 608 bearings. I decided to whip up a quick piece that would make my bearing fit in a hole for a 608 bearing. I made it on Tinkercad, so the quality isn't the best, but it fits in the fidget spinners nicely. The bearing is kind of hard to put in the adapter, so it is very secure. The caps are made specially for this adapter. Print the caps with the x and y dimensions at 103% to make them more snug. If you have trouble putting the adapter in the spinner, try sanding some of the edges so they are slightly rounded. Enjoy!