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Rotating tower bearings

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Subject: Rotating tower bearings
From: (Chris R. Burger)
Date: Thu, 10 Oct 1996 10:37:21 +200
I'm in the process of making a 40 m (130') rotating tower.  The 
rotating portion is being made of something similar to 45G.  I need 
to fabricate bearings for the slip rings to run on.  Some questions 
come to mind:

* Does anyone have suggestions about suitable bearings?  
* Are there rollers, made for some other purpose, that would fit the 
* Should the surface be rubberised, or be bare metal?  
* Should a bearing be supported on both ends of the axis, or is one 
  end sufficient?

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Chris R. Burger

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