GuoBiao really mean national standard. It's internal standard in China. I think the best way of ensuring qualities is to visit the factory that makes it. And get some random samples tested elsewhere.
Does anybody know of a system manufacturers in China use to address
> gear quality? I have spoken with a guy in China, who indicated
> there's a system called "GuoBiao" which is similar to DIN. Has
> anybody ever heard of it? I'm trying to reduce cost for my company by
> switching our sources for gears (AGMA 10) from a US manufacturer to
> one in China. The cost is about a quarter of that in the US, but I'm
> just not sure about the quality. If anybody has any similar
> experience, I'd love to hear it. Thank you in advance.