Koyo bearings for the most part in Service, and some OEM, applications are the old Timken line.
The parent company, JTEKT, bought out Timken roller @4~5 years ago.
They have been manufacturing in the US (NOT China!) since the 50's or something for some high spec bearing applications - think defense ... specially noise and dynamic applications.
They are high quality pieces, and NOT Chinese junk found in cheap 'kits' from some.
I have used them for years and never had a root-cause bearing related failure traced to one yet.
Take it you're commenting about my 'noise' statement.
When testing bearings, specifically for some critical applications, a major criterion was/is how "noisy" (from mismatched components/poor machining-assembly/poor QC-manufacturing specifications-tolerance) they were.
It is VERY important in some applications that things are, and stay, as quite as possible during their life cycles - so others don't know you're there ... :thumbsup:
My experience is that there other, non-critical, bearing offerings also have these same high-quality design and assembly characteristics.
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