Re: G-10 vs.Polycarbonate

["Paul Mathus" <pmathus-at-learningco-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

     G-10 is way better, but very expensive, and more difficult to machine, 
     i hear.
     
     Lexan is a dream to machine, and as you say tough as nails.  But 
     maximum service tempeture is between 250-300 degrees farenheit.  No 
     way you can take it up to 800 degrees F.  I think the injection 
     molding temp is around 600 degrees F.
     
     I am building an srsg with a 3/8" lexan rotor, but I will be running 
     it at low power levels (1.5 KW max)
     
     paul


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Subject: G-10 vs.Polycarbonate
Author:  "Tesla list" <tesla-at-pupman-dot-com> at INTERNET
Date:    7/18/00 8:25 AM


Original poster: Tesla729-at-cs-dot-com 
     
Hi all,
     
This may seem like a dumb question, but I was wondering which plas- 
tic is the supreme choice for SG and RSG insulative supports and 
discs? I've heard a lot about the superb heat & impact resistant and ins. 
properties of G-10 material, but I don't have any personal experiebce w/ 
G-10 myself. However, I do know that G-10 is quite pricey. On the 
other hand, I do have some experience w/ lexan and it is a little cheaper 
than G-10. The manufacturer's label on sheet lexan says that it is heat 
resistant to temps. up to 800 degrees Farhenheit. And I don't think you 
could find a more impact resistant plastic than lexan (polycarbonate). 
This stuff is as tuff as nails and it's easy to machine. I just thought I 
would get some opinions from some of you coilers who have had expe- 
rience with both of these materials.
     
Good Coiling,
David