[techtiger1]

Uhmw machines great but you have to watch the heat a lot and it also likes to flex this is also common with delrin. Uhmw also has the tendancy to burr up pretty good as before mentioned with this material a light finishing pass is generallly required. Lexan machines well but it needs to be used in the right application. I have experience with all three of these materials uhmw is the probablly the most versatile. 1251 started using a new material this year that you might want to look into called ACM or alumnium composite material. This material is a wax based plastic with two thin sheets of alumnium around it. I would be happy to answer anymore specifi questions about these materials.