Re: RSG disk material

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Esondrmn-at-aol-dot-com 

In a message dated 1/19/04 1:35:54 AM Pacific Standard Time, 
tesla-at-pupman-dot-com writes:

Steve,

As others have mentioned, poly is not a good material for a rotary disc.  I 
have used 1/2" thick bakelite.   The material is brown, made up of layers 
of a woven material and bound together with resin.  It is not brittle and 
is easy to work with.  Found it at a local plastic distributor.  By the 
way, G10 is a fiberglass / resin laminate used to make circuit boards.

Checkout the following web site for the early history of bakelite.  Very 
interesting.

http://www.deco-echoes-dot-com/bakelite.html

Ed Sonderman
Spokane, WA

>I have decided to abandon the ARSG and go synchronous . I have a 3450rpm 
>3/4 hp
>   bench grinder that I have modified for 3600rpm synchronous operation.
>I was wondering what material would make a good disk for it? I have read of
>people
>using G10 but I don't even know what it is let alone where to get it. I am
>thinking of
>making a 6" disk out of a 3/8 poly cutting board. I don't think I should
>have a problem
>with the weight (3/4HP).  Has anyone tried this? Will it hold up? I would
>hate to lose an
>   electrode at 3600rpm 8^(
>
>Steve Vance