Re: van de graaff tube (fwd)

[<sroys@xxxxxxxxxxxxxxxxx>]

---------- Forwarded message ----------
Date: Thu, 02 Dec 2004 15:15:54 -0800
From: Ed Phillips <evp@xxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: van de graaff tube (fwd)

"Clearly, one should use the largest pulleys one can, so as to achieve 
the greatest belt surface speed for a given RPM.  ABEC 6 roller 
bearings should give fairly low noise.  One might also try polished 
stainless rod running in a Teflon block."

	If pulley driving speed is an option, for any given inner diameter of
the column there must be an optimum pulley diameter / belt width
tradeoff.  Widest belt means smallest pulley diameter and maximum shaft
speed for given belt speed while largest pulley diameter means narrowest
belt.

	Would the teflon block really be OK with any significant belt tension? 
The darn stuff does cold flow.  Wonder how nylon would work?

Ed