To quickly and most importantly - carefully cut a glass bottle or jar, you can use a home-made device, which you can assemble in literally half an hour. For the manufacture of this device will require inexpensive and affordable materials.
To make an even incision through which a glass bottle can be split, it is best to use a glass cutter. The basis for the arrangement of the main elements can be made from a board or a piece of plywood of a rectangular shape.
The main stages of work
First of all, we make a base from a board or plywood 20 mm thick (sizes can be any, the main thing is that the bottle fits). Approximately in the center of the base, a hole is drilled into which a threaded sleeve is mounted. The bracket for pipe mounting is twisted into it.
At a distance of 15-20 cm from the bracket, four more holes need to be drilled to secure two furniture wheels. They are necessary to turn the bottle around its axis. On the other side of the bracket at a distance of about 4-5 cm, a stop corner is screwed to stop the bottle.
On the side of the base we fasten a small wooden block on which the glass cutter itself will be mounted. To fix the glass cutter, you can use a perforated steel plate, which is used when installing drywall.
To summarize
Using this device, you can quickly cut the bottle in half, without making any special effort. The disadvantage of this design is that when turning the bottle, the glass cutter deviates slightly to the side, as a result, the cut line does not always turn out perfectly flat. Therefore, it is better to make a more rigid mount.