I've used these self aligning bearings similar to this for 40 years with very
large antennas and have never had an issue. I have had issues with official
thrust bearings like TB3. I usually put a heavy duty muffler clamp between the
top of the bearing and the antenna as I don't trust the set screws.
http://www.bearingson.com/category/4-bolt_flanges/cast_iron_4-bolt_flanges/ucf_series/2_4-bolt_flange_bearings_ucf_210-32.asp?page=2&SortType=0
I have never bought from this company but they are probably all alike in that
price range and made in China.
I think I might buy the 2-1/16 one instead for a two inch mast.
73...Stan, K5GO
Sent from my iPad
> On Apr 17, 2015, at 11:49 AM, Robert Harmon <k6uj@pacbell.net> wrote:
>
>
> I am overhauling my rotator and thought it would be good to replace my thrust
> bearing also.
> I have the Rohn TB3 bearing now. It has been in use for 18 years and feels
> pretty rough.
> Im thinking of going with a different bearing this time with a steel body and
> greased. (grease fitting)
> Looked thru the archives on tower talk to find out what others have used and
> can’t find much,
> on this type of replacement and I know the bearing supply houses have them,
> just haven’t
> pursued searching with them yet. I would like to know what others have used.
> If you have used a thrust bearing like this, could you share
> the number and supplier ? Array Solutions has their model TB2 which is this
> type
> of bearing but it only has a two hole flange for mounting. They have a
> larger unit with a 4 hole
> flange but it is for a larger diameter mast than 2 inch. I want a 4 hole
> flange but for 2 inch.
> Here is the info from their webpage:
> https://www.arraysolutions.com/Products/thrustbearing.htm
> Anyway, what say you ?
>
>
> thanks,
> Bob
> K6UJ
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