Frank, my experience goes along with Dougís. UMHW is not hard, in fact Nylon might actually be harder. Iíve turned a lot of different plastic type materials, if I were turning UMHW I would choose a high RPM (1500-2000) and a high speed tool bit with strong negative rake.
But, I also think you should be able to machine it on a wood lathe using a normal chisel and get good results.
"I am enclosing two tickets to the first night of my new play; bring a
friend...if you have one."
--George Bernard Shaw to Winston Churchill
"Cannot possibly attend first night, will attend second..if there is
--Winston Churchill, in response