Bob, see the threaded hole at about 6:00 in the picture? That is there so
you can screw in one of the grease fittings we have been talking about
recently. Then you can inject all the grease you want.
These type bearings are readily available on Ebay from $30 to $60. There
are both 2 hole and 4 hole mountings available.
Like Stan, I have used them for years with very heavy loads and they hold
up quite well. The only real problem seen is after a few years the grease
hardens and can jam the works up enough to stall a rotator. An annual grease
refreshment would prevent that.
73,
Gerald K5GW
In a message dated 4/17/2015 3:12:07 P.M. Central Daylight Time,
k6uj@pacbell.net writes:
Stan,
Thanks for the info. It looks like what I am looking for except that I
would prefer one that can be greased. (Thats just me)
tnx es 73,
Bob
K6UJ
On Apr 17, 2015, at 1:03 PM, Stan Stockton <wa5rtg@gcmail.com> wrote:
> 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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