Step 3: Drilling Holes in PVC Tubing
The most important trick to getting a clean hole in PVC is to commit. The bit tends to grab and quickly rip through the pipe, but if you keep going, it will finish the hole cleanly. Stopping half way through is the kiss of death. It leaves large pieces of material which are difficult to remove without the momentum of the initial attempt.
I hold my pipes for drilling and cutting in a workbench which has two move-able table sections with a grove on their sides that can clamp together. If you don't have something like that, then a v groove or two pieces of wood spaced apart the right width will help to hold the pipe from moving around while drilling and cutting.
Which Drill Bit?
Either brad point or standard twist bits will do an equally effective job at a clean hole, but they are different. Brad point is easier to make an accurate hole with while they tend to be more likely to hurt the opposite side the pipe when punching through. The tip of the brad point has almost punctured the opposite wall on some of the holes I've drilled. I also tried using a drill press thinking it would be easier, but the feedback and control you lose with the drill press made it more difficult for me to use than a hand-held drill. It is a good idea to test out your drilling skills on a test piece before you invest time in your flute. It took me a few shots to get a clean hole the first time.