Hi again Chuck!
I'm cool with the numbers you're talking about. The ones they give you on the other hand are weird. For instance, the larger 6001 bearing in this is known as a "330003-09". If they just said it was a 6001, we could get it from a million different places. I have a feeling those brushes I just bought are the same way. I've got a couple things I need to tear apart right now where I won't know what the actual bearing types are until the machine is in pieces, due to those weird manufacturer numbers. As bad as my memory is these days, it's nice being able to take something apart, replace stuff, and reassemble while the steps are still fresh in my head.