If you need to make small holes in the glass, you can use a simple metal drill. But at first it needs to be tempered. To do this, you need the tip of the drill to the wilted and immediately press the wax. The drill is held there until the wax is finished melting. The tip of the drill is moistened with turpentine, and then start drilling. If the glass item has insignificant sizes, it can be lowered into the water and drilled there.
You can also use diamond drill, which are sold in stores for construction. If a thick glass requires a hole of more than 4 mm, a copper tube with a slightly smaller diameter is used. In the drilling machine, this tube is clamped in the cartridge. Her end must definitely be perpendicular to the axis of the tube. This can be achieved if it is processed on a lathe.
The future hole is marked on glass. Around the mark with plasticine, a fence of 9 mm high is released, the diameter inside this ring should be 40 or 50 mm. Instead of plasticine, you can use a putty. Inside you need to pour corundum powder, which can be made from chopped old sandpaper. A little water is added to the circle, the liquid mass should be obtained. You can start drilling.
