This is a new idea I had and it worked EXTREMELY well. This is a bearing design I made (not following any standards) that uses BB's as the ball bearings. This spinner spins freely when assembled and has no catches while spinning!
 

You will need 6mm competition grade airsoft BB's.

I would recommend these: https://www.amazon.com/dp/B0C7MNR7X7

I used these (I have an old bottle) : https://www.amazon.com/dp/B00FTF0GSM

ASSEMBLY:

Assembling this is pretty straight forward, but it is difficult and takes some time (I am making a better system).

Step 1 is to locate the little notch on the outer ring.

(you need to make sure you have bbs in the back to keep proper space. then you push them in you might have to move the inner ring ultil you hear it click in)

Step 2 Repeat putting in the bbs until it looks like you need one more (it will bind if you fill it all the way.)

When it is all assembled it should work right away without any need to do more. If you want an harder model to make and practice putting bbs in I have a larger bearing model that uses too many bbs to count. HERE