Towertalk
[Top] [All Lists]

Re: [TowerTalk] Thrust Bearing for Use with Prop Pitch Rotor

To: Paul Christensen <w9ac@arrl.net>
Subject: Re: [TowerTalk] Thrust Bearing for Use with Prop Pitch Rotor
From: Stan Stockton <wa5rtg@gmail.com>
Date: Mon, 11 Mar 2019 14:27:42 -0500
List-post: <mailto:towertalk@contesting.com>
Similar to what W7RY recommended but 2-1/8".  Last time I bought any they were 
2-1/8" because of too tight fit on 2".  

https://www.thebigbearingstore.com/2-1-8-four-bolt-flange-bearing-w-lock-collar-hcfs211-34/

73... Stan, K5GO


On Mar 11, 2019, at 7:54 AM, Paul Christensen <w9ac@arrl.net> wrote:

>> 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
> 
> Good point, Steve.  Two years ago, N4CC and I were 48 hours away from "crane 
> day" when we tested the fit of a 3-inch galvanized chromoly mast into a 3" 
> flange bearing.  The mast was approximately 1/16" wider than the ID of the 
> bearing.  We placed an emergency order through DXE for a set of Rohn TB-4 
> bearings which has the necessary clearance.  
> 
> The TB-4 raceway design is terrible but they've been working fine for the 
> last 24 months.  Had the DXE bearings been available, we would have chosen 
> that design over the TB-4.
> 
> Paul, W9AC 
> 
> _______________________________________________
> 
> 
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________



_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
<Prev in Thread] Current Thread [Next in Thread>