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Re: [TowerTalk] Thrust bearing / rotor load

To: "'Tower Talk'" <>
Subject: Re: [TowerTalk] Thrust bearing / rotor load
From: "Mike" <>
Date: Sat, 13 Jun 2009 19:27:15 -0700
List-post: <">>
A good example of a Thrust bearing is in the drive system of an automobile,
where a bearing is thrust  against the clutch plate to disengage the engine
from the gearbox, this is a thrust bearing.  The bearing that we use on an
antenna mast is just a bearing that is usually used to support horizontal
shaft that needs to rotate, no thrust involved.


-----Original Message-----

I wonder how the ball bearings know the difference between vertical and 
horizontal loads and all the points between?

Boys up here usually run two thrust bearings so they can remove the rotor 
for maintenance without having to perform magic to keep things from getting 

Always fun to read the various post on this reflector.

----- Original Message ----- 
From: "Doug Renwick" <>
To: "'Chris Pedder'" <>; <>; "Tower 
Talk" <>
Sent: Saturday, June 13, 2009 9:35 PM
Subject: Re: [TowerTalk] Thrust bearing / rotor load

> Well doesn't that just go opposite to my experience.  I have used TB-3 s
> to bear vertical loads for years without any failure.  Obviously Rohn
> doesn't know that their bearings can bear vertical loads.  Maybe someday
> mine will fail, but most things don't last for ever anyway (especially
> made in China).  Experience trumps.
> Doug


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