spacer welded to a baring

Has anyone seen this before?[attachment:589a61a667c4a]

Sorry I cant really tell the picture is really poor

Its thisbearing-flat_2.jpg welded to thisspacer-thin_2.jpg
It came of a single flywheel spinning at 3000rpm.

Welded… plastic? Why?

Probably not actually welded, just fused together after spinning very fast.

I’m confused, what does this have to do with the thread title?

It looks like a new baring… Is the title better now?