drill old gass

stresses are

Valve grinding compound and a brass tube with a couple notches works well and fairly fast. Gerry :-)} London, Canada

slow, stresses are

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

You don't understand the stakes here. I'm the one that will get the heat treatment. Antique glass top canning jars are quite rare.

Karl

Good advice.

You're not married???

Karl

The 5-piece set I just bought at Ollie's (new discontinued product surplus/salvage store) was $4.99 +tax, a Black & Decker set, although without the hex shanks/quick change capability.

"... quite rare." In that case, don't drill at all. Make 2 capacitors on the bottom of the jars by gluing aluminum foil on the inside & outside. Connect the light(s) (LED's) between the capacitors on the inside and drive the outside with a high frequency. I'll let you work out the numbers.

Bob

Or, do like the chargers for electric toothbrushes & make core less transformers with coils on the inside & outside of the jar. I like the capacitors better.

THEN WHY DOES SHE INSIST ON DISFIGURING AND DEVALUING THEM? (I'm not married, either. ;)

-- Small opportunities are often the beginning of great enterprises. -- Demosthenes

Karl;

I did the exact same job a few years back, and used the technique David describes. It works well, but you have to be patient. It was about

Pete

Not vibration in that case, US car side and rear windows are tempered glass, I'm surprised the window lasted long enough for you to drill through it. Usually tempered glass will crumble after the tensioned surface is scratched. Stuff is very strong, but that's its weakness.

Stan

There are cheap replicas. I sold a couple hundred at a flea market for $1 each. I've seen them in 'Dollar Tree' and other dollar stores too. They have the glass tops and wire bails along with the red rubber gaskets.

FWIW, I read this exact thing some decades ago. Haven't tried it, because I haven't had a need to drill holes in glass, but it's nice to know it works. :-)

Cheers! Rich