Using Delrin Tenons: Difference between revisions

As with any aspect of pipe making, there are many ways to achieve good results with Delrin. The following method is constantly evolving, but may prove helpful to some in developing their own:

Note: If convenient, consider leaving the stem material in the lathe for the entire process (glue up and drilling). This prevents having to re-center it for drilling operations. Multiple sessions where the stem is in and out of the lathe can introduce problems, even with self-centering chucks.  

[[Image:Inlayed_stem_forstner.JPG]] [[Image:Inlayed_stem_facing.JPG]]

The diameter of the Delrin used for the tenon will largely depend on the pipe's final stem and shank diameter. It is critical that your drills match the Delrin you're using, especially with regard to the fit of the tenon in the stummel mortise. Both drills and Delrin very slightly, so some experimentation with speed, feed rate, and different drills, even of the same marked size will result it the best fit. Once you find a good drill, make sure you keep track of it. It may be advantageous to  use a different drill for the stummel than the one used for the stem material.

[[Image:Inlayed_stem_drillingforDelrin.JPG]]

Next measure and cut the section of Delrin to be used. Make sure you leave extra length to allow for trimming it to perfectly match the depth of the mortise. Here we are also gluing up insert material, so that is also accounted for in the length:

[[Image:Inlayed_stem_rounding_Delrin.JPG]]

   

First dry fit everything to ensure your fit is good:  

These serve as excellent clamps. If possible, let all this sit overnight, or until well cured (5 minute epoxy will speed the set time in terms of clamping, but will still not be fully cured for some time. It is risky to drill and fit the stem assembly until it is fully cured). When ever possible, I leave the assembly in the lathe through the entire process. During cold or damp weather I leave the light down close over the assembly (as shown above) while the epoxy is curing.