Gerald Miller wrote:
On Sun, 13 Mar 2011 17:51:41 -0700, Larry Jaques
wrote:

On Sun, 13 Mar 2011 19:21:20 -0400, Wes
wrote:

Karl wrote:

Milady needs me for my shop skills. Don't happen that often.

She has old canning jars. The type with a glass lid and a little wire
arrangement to pull the glass lid tight. She wants to put small lights
inside and needs a hole drilled. I haven't measured up for sure, but
I'm thinking this stuff is 1/8 NPT size.

OK, how do I drill very old glass? I get several points off for every
one I break.

I still like the brass tube and abrasive powder method. If you take it slow, stresses are
much lower than some pointy hard thing.

Industrial diamond paste sounds like something that might hold promise.

It also costs an arm and a leg and takes a week per hole. Pass.
The arrowhead carbides are dynamite, Wes. Try it. You'll like it.
Valve grinding compound and a brass tube with a couple notches works
well and fairly fast.
Gerry :-)}
London, Canada


I remember making lamps out of bottles when I was a kid. I don't
remember exactly how I made the holes but I seem to remember dropping a
ball bearing through a tube onto the bottle and the results were like a
bebe hole in a window. I do remember the way to cut the bottles in
half. Get a piece of cotton string and tie it around the bottle where
you want to cut. Soak the string in lighter fluid and light it up..
The bottle will break around where the string is.

John