Trackballs That Can Spin
Here's a trackball design that spins!
True Spin Balls
As far as i know, only these 2 truly spins. I think they are using ball bearing.
watch at 1:55
Ranking of Trackball Ball Friction
From most smooth to less.
Elecom DEFT Pro
Watch at 10:30 to see spin.
Here's ones i'm not sure how smooth they are. If you know, leave a comment please.
If you have a question, put $5 at patreon and message me.