[TowerTalk] Replacement Thrust Bearing

[Stan Stockton]

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 at 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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