[TowerTalk] Rohn 45 Question

K7LXC at aol.com K7LXC at aol.com
Sat Aug 25 12:09:24 EDT 2007


 
In a message dated 8/25/2007 9:02:02 A.M. Pacific Daylight Time,  
towertalk-request at contesting.com writes:

>  Personally I see no reason for a second bearing and I see a  huge headache 
trying to line up a top bearing, middle bearing and a  rotator on something 
built as unprecise as the Rohn mounting plates.   Your rotator already has 
thrust bearings and it should easily accommodate  the side forces at the 
bottom of the mast if it's properly  sized.
 
    I totally agree. The reason for an intermediate  plate/bearing is to hold 
the mast in case of a rotor swap. That's it. The  accessory shelf already has 
a hole in the middle that'll do just that so the  additional TB is 
unnecessarily redundant and a waste of money.
 
    Tower parts are not precision items. You take a  chance on additional 
bind when trying to line up the rotator and 2 TBs. It's  sometimes challenging 
enough just to get the bind out with one TB. 
 
Cheers,
Steve     K7LXC
TOWER TECH 



 



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