P T Chambers wrote:
> This thread makes me wonder if anyone is using high pressure
> water (with grit) to cut glass???
The big danger in cutting a finished surface is heat -- the hole saw
can produce enough heat to relieve strain in the glass, just enough to
damage the figure. The usual technique is to bore nearly through from
the back, fill the cuts with wax, then finish the figuring. The final
cutting must be done very slowly. And there's the danger of chipping as
the saw bites through.
The water can eliminate the heat, and probably also the risk of
chipping.
-- Jim Van Nuland, San Jose (California) Astronomical Association <a href="http://www.svpal.org/~jvn/ ">JVN's web site</a>Received on Tue Mar 8 11:08:09 2005