They're all just distributers for Chinese manufactured bearings as far as I'm aware. There are USA manufactures that make bearing sizes we use in R/C but are very few. With the two puller projects I have in the works, my intent is to use as many USA made components as I can. What I discovered was US manufactures either don't sell directly to the general public, or if they do you have to buy huge quantities.
When it comes to American bearings though, just because they're made here doesn't mean they're automatically the best. There are other countries that make just as good or even better ones. Countries like France, Germany, or Switzerland for example. China is supposed to have state-of-the-art manufacturing facilities to make comparable ones but can you really trust that? Anyway, stuff being made here doesn't equal superiority by any means, you're just supporting 'local manufacturing' by buying it.

Also, be prepared to pay. The same Chinese bearing we pay a dollar or two for can be like $10 from a reputable country. I'd have to look but I think I paid something like $50 for two 3/8" axle bearings due to the fact.
Don't forget DU-BRO! 97% of all their products are made in the USA.
