This handy little tool lets you cut bottles of various sizes and requires less than $5 in hardware.
I wanted to be able to cut wine bottles into glasses but didn't want to pay the $15-$35 that most cutters cost. So, I picked up some screws and a glass cutter at home depot and ended up with this design. It allows for a wide range of bottle lengths and widths to be cut and it works particularly well for wine bottles. It can also be fully disassembled when not in use.
The maximum cutting length is around 6 in/15 cm (which can be extended if you use longer bolts) and the maximum cutting diameter is hard to estimate but it's probably over 4 in/10 cm.
Assemble the pieces as shown in the photo, using nuts on either side of each panel to hold it in place. Try to keep everything as square as possible.
Screw one small screw directly into the middle slot on the glass cutter. Use the other screw and clamp piece to secure the glass cutter from another point so it is stable when you are scoring a bottle and applying force.
DISCLAIMER: Bottle cutting involves broken glass and boiling water. Together. At the same time. As such, it is very dangerous. The proper gloves and eyewear are necessary for these conditions. I cannot be held responsible for any injury caused by using this method.
To cut a bottle, first put a pot of water on to boil. Then remove any labels from the bottle you are using and wash the bottle to remove any residue. Optionally, you can apply some mineral oil to the area where you will be scoring. Otherwise, simply place the bottle against the cutting wheel and, while applying some force both downwards and towards the backstop, score the bottle once around. When the water reaches a rolling boil, don a pair of heatproof gloves and eye protection and, with the bottle in the sink, turn the tap on COLD and run it over the bottle while rotating it in one hand for ~20 seconds. Then, switch to slowly pouring boiling water on the bottle while continuing to rotate for ~20 seconds. Repeat this hot-cold switch until the bottle breaks. Finally, use sandpaper (and water - don't breathe glass dust!) to sand down the cut edges of the bottle and give it a good wash.
- 2 long bolts that will fit a 7 mm hole
- 10 nuts to fit the long bolts
- 2 screws that will fit a 4 mm hole (I used #6-32 x 1 in machine screws from home depot)
- 2 nuts to fit the screws
- 1 glass cutter/scorer, I used this one which costs $3