Yes, I too have noticed the same thing with drill bits, but as long
as they make a decent hole, they are still sharp enough to cut ;-)
Glass is a bear to cut, no doubt. I have only had moderate success
with cutting it using tin snips. Perhaps this year I can finally
aford to get something appropriate like a shear or similar. In the
mean time, I will keep using that cabide tipped saw blade until it
starts to shred as opposed to cut.
--- In
Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
<stefan_trethan@...> wrote:
>
> On Mon, 22 Jan 2007 12:32:28 +0100, lcdpublishing
> <lcdpublishing@...> wrote:
>
> > It too (Carbide tipped) will dull quickly - not sure why as
carbide
> > drills hold up so well. But I can assure you, I have tried and
it's
> > not a good option.
> > Chris
>
>
> Well the drills dull too, after not that many holes. You notice it
most
> when you break one by accident, and the new one cuts much better.
Some of
> my drills make a burr in the copper because they are dull. But
drills are
> cheap, saw blades are not.
>
> We are cutting glass after all, let's not forget that ;-)
>
> ST
>