What You Will need:
- Water dish
- Small Diamond Core Drills
- Rotary drill, pendant drill, drill press or Micro Motor
- Safety goggles
Mark your stone with your entrance and exit hole. Set up your water dish, either an ice cream tub, sandwich box or some form of solid tray with a piece of wood or blu-tac to hold the stone on whilst drilling. It will need to be deep enough to immerse your stone in. Select your drill bit, say 1.5mm and attach to your drill. You may need a collet or adjustable chuck which is able to hold the shaft of the small drill bits, have a look here.
Whilst keeping your stone immersed in water and holding your stone, start your drilling. Go slow to begin with to prevent the drill bit skittering across the surface of your stone. Once your initial starter hole has been created begin to move the drill bit up and down to allow water to flush in and out of the hole to remove the drilling debris and to keep the area and the drill bit cool. Overheating can cause the diamonds to come off the drill bit and the material you are drilling to shatter.
Once you have drilled about halfway through flip the stone over and begin drilling again from the other side where you have marked. If you were to drill straight through there may be a possibility of chipping your exit hole.
If you discover the hole needs opening up further use one of our twist drills to do so. Finally clean off the pen marks and there you have it, your nicely drilled pebble.
Tip: To determine the centre of your pebble wrap two pieces of string around the stone. Where the string crosses on top and bottom, mark with your pen.
For further help, you might also like to read our article:12 Things you Should Know about Diamond Drill Bits