Over the years I have had my share of broken tenons to remove. Some of them came from carelessness on my part but others I purchased that way. I took pictures of the process I use on two different pipes recently. The first was a little Barling with a broken tenon and a chewed stem. I ended up restemming this one. The second one was a Peterson 999 with a broken tenon that I hope to reuse the stem by drilling/tapping and inserting a new tenon to refit it.

Insert a screw part way into the airway on the broken tenon in the shank of the pipe. I use a dry wall or gyprock screw. I turn the screw in by hand. I do not want to expand the tenon at all I just want the screw to have a little bite to it so that I can use it to pull the tenon out by hand or with a pair of needle nose pliers. In this case in both pipes I was not able to pull out the tenon easily. Many times I am able to pull it out in a matter of seconds using this method. But both of these were exceptionally tight and immovable. I put them both in the freezer for an hour as I know that vulcanite and briar contract at different rates with a change in temperature. After an hour I removed the Barling from the freezer and was able to pull the broken tenon out very easily. I then unscrew the broken piece and lay it aside to use for a match on the new tenon I will cut as a replacement. It helps me to eyeball the fit. I also measure the mortise and set the tenon turner as closely as possible to the measurements. I then take the broken piece and slide it on the tenon turner to check the fit.

The tenon on the Peterson however, still did not budge after an hour in the freezer. I left it in for another half hour. Still it did not budge. I then dripped Isopropyl alcohol into the exposed mortise and hoped that it would work as a solvent to break the tenon free. I repeated this several times and left the pipe sitting with alcohol in it over night. The next morning the tenon still did not move.

I decided to not fiddle around with trying to pull the tenon. I used my small drill bit and began to drill out the tenon. I never start with the exact size of the tenon but rather work with the size of the airway and work my way up. I have found that in the process of working through the bits the tenon inevitably breaks loose or crumbles to pieces. In this case, by the time I got to the third drill bit, when I reversed it the tenon came out with the bit. You will notice that I also flattened the broken portion of the tenon on the stem so that the surface was flat and smooth. I wanted it to be ready for when I would drill it out or tap to receive the new tenon that I have ordered.

As I close this essay I want to just mention a couple of reminders:

1. Do not turn the screw into the airway to deeply as it does expand the airway and can actually crack the shank on the pipe. BE CAREFUL and go slowly.
2. Do not use a tool to turn the screw into the airway – do it by hand so you can feel the progress and the bite before damage is done.
3. If the tenon is stuck and immoveable in the first try put the pipe in the freezer for an hour or more to expand and contract the tenon and mortise. This usually works to break it free.
4. Should you have to drill it out – use a bit a little larger than the airway to begin the process and work your way up to larger bits. Do not use a drill bit that is the size of the mortise lest you damage the mortise.
5. Use a T handle hand drill not a power drill to do this as you can easily drill right through the bowl and ruin the pipe.