[TowerTalk] Rotor plates

[Keith Dutson]

I have an AS455G plate that had TB3 installed in 1998.  It was taken off a
tower that was located near the Gulf Coast.  Upon removal of the TB3, it was
discovered there was no rust in the holes.  There was evidence of cold
galvanizing paint.  The steel used for the plate must be rust resistant.

Keith NM5G

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Jeff Maass
Sent: Thursday, November 04, 2004 7:22 AM
To: kb9cry at comcast.net; TowerTalk List
Subject: RE: [TowerTalk] Rotor plates


There is (almost) nothing harder to drill than galvanized plate like the
Rohn rotor plates!

I had to take mine to a shop to have it done by someone with a very
heavy-duty drill press and proper very-hard bits. It took a while, with some
cursing thrown in.

Cold galvanizing will probably not hold up against moisture in that
application (threads will wipe it away), but you can start there.

What do others suggest?

73,

Jeff Maass  K8ND
 

> -----Original Message-----
> From: towertalk-bounces at contesting.com 
> [mailto:towertalk-bounces at contesting.com]On Behalf Of 
> kb9cry at comcast.net
> Sent: Thursday, November 04, 2004 8:05 AM
> To: TowerTalk List
> Subject: Re: [TowerTalk] Rotor plates
> 
> 
> That's probably because rotator plates are not meant (by Rohn) to be 
> used with
> TB-3 thrust bearings, just rotators.  The Rohn top plates are drilled 
> for TB-3s but not rotators.  I'd say get out your drill and have at 
> it.  Don't forget to spray some cold galvanizing on the inside of the 
> holes as you'll have bare, unprotected metal there.  Phil  KB9CRY
> 
> > I stand corrected. Just looked at a spare one I have around and, 
> > sure enough, no TB-3 holes!
> > 
> _______________________________________________
> 
> See: http://www.mscomputer.com  for "Self Supporting Towers", 
> "Wireless Weather Stations", and lot's more.  Call Toll Free, 
> 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
> 
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_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.

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