Use these for thrust loading in a rotary bearing arrangement. I can find these with a blue plastic separator for less than $3 ea so don't know why they are so pricey here.
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Must have thrust
November 17, 2011
Reviewer:
Frankmedman from Houston, TX
Great little bearings. Did the job. I put them on the cross slide handle of my mini lathe. Works great now.
Expensive 
Must have thrust