Jim,
How is the fit on the ID?
So, many of this type of bearing will not work due to the tight tolerances. A
mast that’s been galvanized usually will not fit.
73 de Steve, NR4M
Sent from my iPhone
> On Mar 11, 2019, at 8:23 AM, Jim <jimw7ry@gmail.com> wrote:
>
> This is what I have used for 30 years. Same bearing on 4 different towers in
> various locations. In Southwest Washington, we got 70" of rain per year. Held
> up fine.
>
>
> https://www.ebay.com/itm/UCF211-32-2-Square-4-Bolt-Flange-Bearing/362153741170?hash=item54520b8b72:g:a2QAAOSwnTdaA6IQ
>
>
>
> I do put a cover over the top of it with a vent pipe roof jack (just the
> rubber part) to keep water out.
>
>
> Thanks
> 73
> Jim W7RY
>
>> On 3/10/2019 10:32 PM, Tim Duffy wrote:
>> Best bearing - can take lots of weight.
>>
>> https://www.dxengineering.com/parts/dxe-tb-300
>>
>> Very different from the Rohn
>>
>> 73
>> Tim K3LR
>>
>> -----Original Message-----
>> From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
>> Patrick
>> Sent: Sunday, March 10, 2019 12:20 PM
>> To: towertalk@contesting.com
>> Subject: Re: [TowerTalk] Thrust Bearing for Use with Prop Pitch Rotor
>>
>> I'd double check the need for a down thrust bearing to relieve the
>> weight from the PP unit. Kurt Andress the preeminent PP re-purpose guru
>> advised me against it.
>>
>> Patrick NJ5G
>>
>>
>>> On 3/10/2019 10:16 AM, Mike wrote:
>>> Hello,
>>>
>>> What have others used to take the weight off of a tower mounted prop pitch
>>> rotor?
>>>
>>> Presently, in the final stage of modifying a rescued prop pitch and,
>>> unfortunately, it didn't have the triangle bearing plate. Plan to use a
>>> couple of Rohn TB3 thrust bearings, one at top of the tower and the other
>>> approx. 2 ft below the top, but wanted to find out what others
>> successfully
>>> have used to keep the weight off prop pitch rotors.
>>>
>>> The load will consist of a 2" dia. X 1/4" wall X 21 ft chrome molly mast
>>> plus a homemade 40 m Moxon (approx. 70 lbs) and a 4 el SteppIR (approx. 50
>>> lbs).
>>>
>>> I've review the TT archive for thrust bearings for possible application
>>> with a prop pitch rotor without any consensus on what to use other than
>> the
>>> available thrust bearings are not reliable in the long run.
>>>
>>> 73,
>>> Mike, K4GMH
>>> _______________________________________________
>>>
>>>
>>>
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