Things You'll Need
Diamond drill bit
Use a glass vase for more than just displaying flowers. For example, you can make a table lamp or other decorative project from one. Vases have been made of beautiful glass and ceramics for a great many years, which means you have hundreds of choices when it comes to picking one for your lamp or other project. Making a professional-looking item requires just one skill: how to drill a hole in a glass vase.
Adjust the trigger lock to limit the speed of your drill. Keeping the speed down minimizes heat buildup during drilling. Run hole saws very slowly, about 600 to 700 RPM. Rotate drill bits at 2,500 RPM to 5,000 RPM.
Spray or stream water on the contact area between the drill bit or saw and the glass. The water keeps the glass and bit cooler and helps reduce the chances of the glass breaking because of thermal stress.
Apply light pressure on the drill. Allow the bit to work at its own speed as forcing it in to the hole greatly increases the likelihood of a ruined project due to the vase cracking and breaking from thermal stresses. Reduce pressure even more to avoid cracking and splintering when the bit is close to breaking through the glass.
Sand and smooth rough edges with emery cloth to finish the hole.
If a steady stream of cooling water can not be maintained while drilling, dripping, puddling or spraying water on the drilling site is fine. Keep it wet, maintaining at least a muddy slurry while drilling progresses.
Don't rush things. Let the bit cut at its own rate for the best results. Watch your bit for any discoloration and slow down if you see any.
Electricity and water are a dangerous combination. Be extremely careful when using an electric drill and water together. The drill should be plugged into a GFCI-protected receptacle for safety.