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[TowerTalk] Tri Ex mast sleeve

Subject: [TowerTalk] Tri Ex mast sleeve
Date: Fri, 14 Oct 2011 14:18:27 -0400 (EDT)
List-post: <">>
The Tri-EX mast sleeve is designed for 2" tubing (OD= 2.0", don't confuse  
pipe sizes which generally describe the ID of the pipe.  1-1/2" Pipe OD  
measures slightly under 2" dia. and a little sloppy in the Tri-Ex sleeve.   I 
have made stainless steel shims to fill the gap. (roll flat stock into a  
circle).  With lubrication the sleeve will act as a bearing, but it can  easily 
bind depending on mast length, centering and wind speed.  Replace  the 
locking bolt on the sleeve with a Zerx fitting to simplify  lubrication.  It is 
also a good idea to make a grease seal at the bottom of  the sleeve - a 
piece of leather belting and a hose clamp is a simple  method.
Just remember plumbing pipe does not have the strength of quality 2" mast  
Norm W4QN  

In a message dated 10/11/2011 11:03:51 P.M. Eastern Daylight Time, writes:

Message:  4
Date: Tue, 11 Oct 2011 16:49:02 -0700 (PDT)
From: Chris Merchant  KA1LMR <>
Subject: [TowerTalk] Tri-EX Tashjain Towers  fit 2" mast ?
Content-Type:  text/plain; charset=iso-8859-1

I notice the 4" sleeve below the thrust  bearing of a WT-51 tower is just a 
hair over 2"? ID. I am wondering if an  actual 2" steel 1026 Steel pipe 
will comfortably fit inside and turn? without  a problem when greased?? I 
tested a 1 7/8 pipe? there didnt seem to be much  play in the sleave but was a 
little sloppy fit? in the upper? thrust bearing  lip. just dont want to spend 
$300 or so on a actual 2" mast if its not going  to fit.


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