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Posted by mm on May 4, 2007, 4:37 pm
On Fri, 4 May 2007 12:08:21 -0700, "charlie"
>
>> Method 3:
>> Get a dremel tool with a thick grinding wheel, and prop it against
>> the glass, running, and go read a book.
>
>without coolant, nfw this will work
For coolant, could one just fill the bottle with water. Or does the
water have to be closer to the wheel?
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Posted by charlie on May 4, 2007, 6:08 pm
> On Fri, 4 May 2007 12:08:21 -0700, "charlie"
>
>>
>>> Method 3:
>>> Get a dremel tool with a thick grinding wheel, and prop it against
>>> the glass, running, and go read a book.
>>
>>without coolant, nfw this will work
>
> For coolant, could one just fill the bottle with water. Or does the
> water have to be closer to the wheel?
you're cooling the tool and the glass you're grinding. temperature
differentials in different places in glass cause cracking. the water on the
inside won't cool the outside of the bottle except through convection, and
glass is a good insulator and a (relatively) poor conductor of heat. that's
why you have to carefully anneal glass when cooling it.
regards,
charlie
http://glassartists.org/chaniarts
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Posted by DanKMTB@gmail.com on May 4, 2007, 3:55 pm
> I have a few empty Crown Royal bottles out of which I want to make small
> lamps. Most are the 750ml size & a couple 1.75 liter size. The bottles are
> attractive and I think they could make nice lamps for background or accent
> light in an office or den.
>
> My problem is that I don't know how to make a hole in the back side of the
> bottle near the bottom in which to thread zip cord.
>
> I've tried new drill bits running the drill press as slowly as possible,
> using various lubes (oil, alcohol, and carb cleaner), but can't get a hole
> started in the glass. I even tried a masonry bit - didn't work either.
>
> Any ideas? Thanks, Bob-tx
Glass bit is best. Other bits can be made to work with a LOT of
care. It helps if you have a few bottles on hand, so you don't have
to worry too much about breaking one. I find if I have 20, I'll drill
the first no problems, or at least the second. If I've only got 1,
I'll break it. Maybe the extra nervousness takes away from the
smoothness of my hand controlling the drill? Crown is tasty stuff, so
coming up with surplus empty bottles should be a joy.
Filling the bottle with sand seems like a good idea, never heard that
before today. The dremel w/ a grinding wheel is interesting as well,
though it would certainly require attention and lubricant. I've no
experience with either method, however.
You may try to tape the area you want to drill before drilling. I've
sucessfully drilled through glass with a regular bit by putting plenty
of tape over the area so that I was drilling through at least 1/16" of
tape using an _extremely_ light touch and plenty of cutting oil.
I've also used wick holders meant to fit into empty bottles and
convert them to oil candles. No holes required, nice light, oil can
be nuetral or scented. Cost ~$1US each at candle shops everywhere.
Not as bright as an electric light, but not a bad option.
Post back, let us know how you make out. Especially if you try the
dremel w/ grinding wheel.
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Posted by on May 4, 2007, 6:56 pm
Have you thought about using hydrofluoric acid instead?
> I have a few empty Crown Royal bottles out of which I want to make small
> lamps. Most are the 750ml size & a couple 1.75 liter size. The bottles are
> attractive and I think they could make nice lamps for background or accent
> light in an office or den.
>
> My problem is that I don't know how to make a hole in the back side of the
> bottle near the bottom in which to thread zip cord.
>
> I've tried new drill bits running the drill press as slowly as possible,
> using various lubes (oil, alcohol, and carb cleaner), but can't get a hole
> started in the glass. I even tried a masonry bit - didn't work either.
>
> Any ideas? Thanks, Bob-tx
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Posted by sylvan butler on May 12, 2007, 4:25 pm
wrote:
>> Have you thought about using hydrofluoric acid instead?
> have you ever read the msds on HF? there aren't too many things more
> dangerous than this.
>
> http://www.jtbaker.com/msds/englishhtml/H3994.htm
Yup.
> this would be just a bad idea, besides the fact that it would be pretty hard
> to source the HF.
Nope.
Most grocery or department stores in cleaning products.
http://www.whink.com/rust_stain_remover.htm
Granted, it is a dilute solution, but if you leave it on glass you will
cut it, eventually. With minimal contact time, it also works well
removing some hard water deposits on glass when regular lime removers
fail.
sdb
--
What's seen on your screen? http://pcscreenwatch.com
sdbuse1 on mailhost bigfoot.com
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