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[TowerTalk] Re: Thrust Bearing Usage

Subject: [TowerTalk] Re: Thrust Bearing Usage
Date: Mon, 25 Oct 2004 14:25:05 +0000
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Rotators are designed to take the vertical load of the mast/antenna assembly.  
You'll probably find folks are divided as to entire load on rotator or thrust 
bearing.  Personally what I do is to install the mast down onto the rotator.  
Then I attach a heavy duty stainless steel pipe clamp onto the mast and slide 
it down tight onto the thrust bearing and secure it.  Then I install my 
antenna.  So both are sharing the loads.  Also, the thrust bearing side screws 
are only used to center the mast in the bearing; they are never used to hold 
the weight of the assembly.  To change out the rotator I'll either use a 
come-a-long inside of the tower and jack up the mast or use a scissors jack on 
the top plate and jack up against the antenna boom to mast plate.  Gd luck, 
Phil  KB9CRY

See:  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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