Btw, interesting observation on the wiki page: Caged bearings use fewer rolling elements than loose bearings so the load on each one is greater. But the cage prevents the balls from rubbing against each other and extends overall bearing life. (Plus it makes them easier to not lose.)
So contrary to what some say, don't be so quick to toss that cage in favor of an extra ball or two. You can pop new balls into the cage and maybe gain some bearing life.
Except the balls are rubbing against the cages so it probably equals out.
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Today, I believe my jurisdiction ends here...