Serge VIDAL wrote: > I just machined my first Delrin part, and I can tell you Delrin is an > absolute pleasure to work with, especially compared with plain Nylon! > It does not melt easily, and can be sanded very easily, up to a > glaze. Another nice thing is it can be found in black, which looks > better than the yellowish Nylon. If you have to make Nylon blocks, > like rudder pedal mounts, for instance, you should consider Delrin > instead. It has the same mechanical properties. > > I think I will find many applications for this thing, because I simply > love it!
The only problem I've had with delrin is that it shrinks from tooling and slowly expands over a couple of days, trashing tolerances (though I was dealing with +/- .0005"). What I do is get it to within .001" or so and let it sit overnight, then freeze it and do the finish cuts. At one point I had a few small pieces of some kind of nylon-like plastic that was stuffed full of graphite. It looked like black delrin but made the best low speed bushings I've ever seen. Can't seem to find any more of it, though. UHMW does a decent job, too, but it doesn't machine as clean as delrin or nylon. The price is better, though, and it's lighter than delrin. -- Steve 33...@swbell.net N3343V- '75 C150M N205FT- KR1 #6170 He who seeks will find, and he who knocks will be let in.
