[TowerTalk] TB3 Bolts

[john at kk9a.com]

Depending on your location, it may be better to use galvanized hardware. 
Tom may be using this bearing at his Barbados station.  It has been my 
experience that in highly corrosive environments, there is tremendous 
corrosion to aluminum when it touches stainless steel.  I had poor luck 
using a TB3 bearing at P40A.  My first one wouldn't easily turn when new and 
the replacement started to get tight after six months.  I replaced it with a 
Create bearing and I had no problems.  Good luck with your project Tom!

John KK9A



To: <k3lr at k3lr.com>, "'Georgens, Tom'" <Tom.Georgens at netapp.com>, 
<towertalk at contesting.com>
Subject: Re: [TowerTalk] TB3 Bolts
From: "Mark Robinson" <markrob at mindspring.com>
Date: Sat, 13 Aug 2011 10:11:32 -0400
List-post: <towertalk at contesting.com">mailto:towertalk at contesting.com>

On the advice of others. I replaced the plated mast clamp bolts ( horizontal
bolts) with s/s hardware and applied plenty of Never Seez to the threads. I
don't want to have to drill those bolts out while standing on the top of the
tower.


Mark N1UK


----- Original Message ----- 
From: "Tim Duffy K3LR" <k3lr at k3lr.com>
To: "'Georgens, Tom'" <Tom.Georgens at netapp.com>; <towertalk at contesting.com>
Sent: Friday, 12 August, 2011 11:48 AM
Subject: Re: [TowerTalk] TB3 Bolts


> Hello Tom!
>
> There are 4 bolts on the Rohn TB-3 that attach it to the top tower plate.
>
> The galvanized bolts are 0.500" in diameter - the nuts are 0.750" and the
> bolt head is 0.875". They are 1.5" long. The as drilled holes in the
> bearing
> mount are 0.59375" in diameter.
>
> The three horizontal bolts that secure the mast are 0.375" diameter.
>
> 73,
> Tim K3LR
>
> -----Original Message-----
> From: towertalk-bounces at contesting.com
> [mailto:towertalk-bounces at contesting.com] On Behalf Of Georgens, Tom
> Sent: Friday, August 12, 2011 10:35 AM
> To: towertalk at contesting.com
> Subject: [TowerTalk] TB3 Bolts
>
> Hello
>
>
>
> Does anybody know the size of the bolts that connect a TB3 thrust
> bearing to the top of the tower.
>
>
>
> Thanks for your help
>
>
>
> 73, Tom W2SC