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Re: [TowerTalk] Grease for Rotor bearings

Subject: Re: [TowerTalk] Grease for Rotor bearings
Date: Thu, 20 Oct 2011 09:48:08 -0400 (EDT)
List-post: <">>
In a message dated 10/13/2011 4:19:33 P.M. Pacific Daylight Time, writes:

>  I've seen this grease/no grease thread for years and  never gave it much 
thought. But, I now have to wonder why anyone would design  a bearing with 
an aluminum body/race ?  The reason I say this is that I  took down a tower 
several years ago that had a TH6DXX on a TB3.  The  system had been idle for 
several years with the antenna rocking back and forth  the whole time. Even 
tho the brake on HAM-M was set there's still some  movement. As a result, 
the bearings ground into the race and dug out pot holes  to the point that 
the bearing would not turn at all.

    Yep. That's what happens when you have soft  aluminum races and hard 
steel ball bearings. A good reason to exercise the  rotator once in awhile and 
not always leave the antenna parked at the same  heading. 
Steve     K7LXC


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