I think sometimes so many of us have lost all common sense. This argument comes up frequently here, the "China" manufacturing myth.
ALL products are made to a design specification which includes but is not limited to Material grades and testing, QA procedures, Manufacturing processes, tolerances as per the design drawings, shipping and packaging.
It is the Company that puts it's name on the product that produces these design specs. That company is more often than not an American one.
Any company anywhere in the world can design a cheaper product by lowering the criteria of the design spec. And that product can be made in the US, China, Indonesia or anywhere...to those specs.
Many of the highest quality products you use on a daily basis from parts in your cars to your flat screen SONY tv's to your new Apple I PAD are manufactured in ...yes CHINA.
The Chinese are one of the top 3 of Asia's highest educated, most literate, most highly motivated workforces and large companies that produce great products know this.
You only show your lack of knowledge of the world, how manufacturing really works and how companies do business in todays global market. Most of you just really have NO IDEA. But you continue to disseminate on this forum misinformation, Myth and just downright bad information on this topic constantly.
I can take any of you to factories in China that rival anything in the USA or Germany or England for sophistication, technology, workplace environment, ISO standards, and quality of production.
Some of you are just the last holdouts of a (thankfully) dying breed of uninformed Luddites with a strong dose of jingoism thrown in for good measure.
Problems like these bearings, which we do NOT have enough information to make ANY kind of intelligent judgement about are often oversimplified and become the topic of AXE GRINDING.
But I think it is safe to assume that if there are problems in ALL of the bearings in one installation. I would start looking at the INSTALLATION as my first point of interest, not the manufacturer.