A place for more technical discussions. Please make sure you post in the correct section on the site, this way it keeps the site tidy AND ensures you get a more relevant answer.
I did a lot of work on CNC grinders for RHP bearings in Newark. Their precision dept mostly.
If you look at the quality of the "cheap" bearings, they are pretty much what was being used in the UK 30-40 years ago. That is because they are the same machines and they were sold to the Far East/Asia. They have now come online properly and can flood the market.
The accuracy that is achievable with modern grinders is probably only 10% greater but it is a very important 10%.......
Steel quality is a major issue as is heat treatment. A great many variables need to be lined up to produce top quality bearings.
Koyo are a true Jap firm and manufacture with disciplines such as Kaizen, TPM, 5 S's and so on. They should be almost unbeatable in terms of quality.
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