> The Rohn TB-3 is a non-lubricated thrust bearing. Since it only turns 1
> RPM, the demands on it are only moderate. It's a race and ball bearing
> arrangement and is one of the few bearings suitable for outdoor use.
> 73, Steve K7LXC
I've talked with others who have used the Rohn bearings and they say that
the bearings tear up pretty easily because they use aluminum races. After
setting in one position for a long time the bearings actually make dents
in the race. Have you seen this happen?