Delrin is a fantastic material for laser-cut prototypes, but it’s also notoriously slippery. While building my desk, I needed an extra length of Rexroth (extruded aluminum) tubing mounted vertically. Rather than pick up a set of plates, I was able to mount the two tubes together with two laser-cut Delrin plates and a laser-cut sheet of santoprene (rubber) for added friction.
Behold–the Delrin sandwich! At this point my monitor is suspended nicely with the extra tubing fastened via this trick.