Re: [ATM] Cutting Porthole in half

[Michael Lindner <mikell@optonline.net>]

Thomas A. Moulton wrote:
> What would be the best way to slice a porthole window in half?
> 
> Would a glass shop with water jet be able to do it?

No. You need a diamond band saw ow wire saw. Frankly, I wouldn't bother. 
The cost of cutting this and blanchard grinding the resulting blanks 
flat again will likely be more than the blanks are worth, and you risk 
breaking the blank. I have a friend who looked into having a 20x4" 
zerodur blank split in half and eventually decided that wasn't worth the 
money and risk. If you're doing this just to get a thinner blank, an 
easier way is to sell the 3" blank and buy a thinner one with the money. 
Just my $0.02.

Clear skies.
-- 
Michael Lindner
http://www.starastronomy.org *** http://home.att.net/~mikel
http://www.atmsite.org *** http://www.atmlist.net
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