Trouble Cutting a Glass Bottle!
l am attempting to cut glass bottles horizontally. l bought a simple glass
cutter from my local hardware store and attempted a very ''easy'' method l
found online. This method was to score the bottle with the glass cutter,
heat the score line with a flame, and then introduce the bottle to a cold
bath which should have resulted in the bottle seperating at the score
line. This did not happen. l am not sure if l have a bad bottle or a bad method. This way seemed to work for many other people online. When it did not work the first time l tried a few different things. One was to tap the glass around the score line in hopes that the bottle needed a little prodding to break. Another was to try boiling water instead of a flame. Needless to say, nothing helped after mutiple tries. My question is, does anyone know of a method that works better? l am only an amateur and do not wanna invest in a tile or wet saw as this is something l only will be doing on occassion. Other methods l have heard of is soaking a string in acetone and tying that around the bottle in the place l want it to break, light the string on fire, and then place it in the cold water. Another is to fill the bottle up with cold water to the point l want it to break and put a hot metal rod into the water. The final method which seemed easy enough is to score the bottle, place it in the freezer, and after awhile put it into hot water. Do you know if any of these work better? Please help! Thanks!
When you cut glass with a glass cutter, you are not cutting it,
but creating a scratch that breaks the surface tension (Think of glass as a
liquid in solid form). If you score the bottle & then heat the waste side
of the cut with a propane torch, you should be able to break it by then
dipping the waste end of the bottle in a pail of water. Glass, you see,
is a poor conductor of heat, that is why it usually cracks when exposed to
excessive localized heat. Cutting glass with a carbide cutter would take forever. This is intriguing to me. I might try it tomorrow & see what happens. I once managed to screw a wood screw through a glass bottle (I've also cut glass with scissors), so I can not see why this should be so difficult. I will try to put the results of my experiment on there over the weekend.
First, only use bottles that have a reasonably constant
thickness all the around; some vary greatly & those are almost impossible
to cut reliably. Next, be sure there you leave no gaps in the line scored
around the bottle. You need to tap on the INSIDE of the bottle directly ON
the score mark. I use a stiff steel rod with a very short loop on the end
(It has to be small enough to insert into the mouth of the bottle) that is
inserted tightly into a cork. By sliding the cork up & down the rod you can adjust the depth to be able to rapidly tap exactly the right place as you turn the bottle following the crack that forms all the way around the bottle. It takes a little practice. You always have a few that crack in the wrong direction & are ruined but as you get the hang of it losses get smaller.
you could try a tungsten carbide hacksaw blade like these
http://google.com/products?hl=en&source=hp&q=glass+hacksaw+blade&um=1&ie=UTF-8&ei=KOzYSo7NF5C4MKDVvd4H&sa=X&oi=product_result_group&ct=title&resnum=4&ved=0CCUQrQQwAw
or try a Carbide Grit Rod Saw, fits in your hacksaw frame
http://mkmorse.com/hackrs.html
Ideas:
1. Try a different bottle, such as a wine bottle.
2. Use a plastic bottle.
3. Use a drinking glass. that looks like the bottom half of a bottle.
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