Tapping PVC pipe can be a problem if you don’t have the correct number of teeth on your cutter. PVC pipe is a soft material and can load up in between the teeth and cause the cutter to bind or stop turning in the cut. The cause is too many teeth on the cutter. The material has no place to go so it fills up the gullet between each tooth. The answer to the problem is to send me a cutter to be rebuilt with fewer teeth and a tooth design made for cutting PVC pipe. If you have any questions please feel free to contact me at 407-508-1063 . When you use the right tool to do a job you will experience trouble free cutting. It is important to keep your cutters and pilot bits sharp.