Hi Grant
I use it as radial only bearing. My rotor support all the weight of the
mast and antennas. Thanks for the advice, will look for this to replace my
broken TB
73,
Jorge
2016-10-11 16:50 GMT-03:00 Grant Saviers <grants2@pacbell.net>:
> Jorge,
>
> Do you really need a thrust bearing or would a radial only bearing do the
> job? Most rotators will handle the thrust load (mast plus antenna weight)
> ok, but need a radial bearing at the tower top for lateral support.
>
> If radial only is ok, then some thick plastic (or several pieces at least
> 1/2" thick), with a hole bored to the mast outside diameter plus about
> 0.030", drill holes for the mounting bolts, saw the plate in half thru the
> mast hole and bolt it in place. Black UHMW is usually fairly UV proof,
> very slippery, cheap and available to several inches thick. I use 4"
> thick, but that is probably overkill. Some use oak or other hardwood
> (teak?) but not sure how long that will last, especially in your climate.
>
> I'm not aware of any split real thrust bearings but split shaft collars
> are available http://www.mcmaster.com/#split-shaft-collars/=14jxj7i Not
> sure how well that would work with a split joint on the collar and one on
> the plastic radial bearing.
>
> IMO, many commercial "thrust" bearings for towers are not very good thrust
> or radial bearings, need regular lubrication, and are prone to failure as
> you have experienced.
>
> Grant KZ1W
>
>
>
>
> On 10/11/2016 11:48 AM, Jorge Diez - CX6VM wrote:
>
>> Hello
>>
>> do you know about a clamp on thrust bearing?
>>
>> I need to replace a broken one on top of the tower and i dont want to
>> remove 2 big antennas I have on the mast
>>
>>
>
--
73,
Jorge
CX6VM/CW5W
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