4.5mm ballbearing (changeable in sice)

Hi,

this is a ballbearing I created for fidgetspinners.
I designed it to work with 4.5mm steelballs. But you can also use any other kind of balls. (like 6mm BB's. For that, you just have to change the sice of every part in your slicer up to 134%)
It is a bit fiddly to remove the ridges inside the outer part. Please don't despair on it. It's worth it. Here is a youtube video with instructions how to assemble a ballbearing:

This is not my Video and not my channel!
https://www.youtube.com/