The technique I am speaking of uses something like 40,000 psi water. Cuts
most anything absolutely cleanly and with no heat build up (one of the
uses is to cut very high strength steel where heating would damage the
heat treat). No chipping either.
---------
Phil Chambers [ptchamb@No-Spam] (S.F. Bay Area - Calif. USA)
On Tue, 8 Mar 2005, Jim Van Nuland wrote:
> 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
> JVN's web site
>
>
Received on Tue Mar 8 11:20:20 2005