"Robert Swinney" wrote in message
...
snip----

Run slowly when working plastic. Plastic will soften under the generated
heat causing drills to wander in the hole and seek the wrong path.

Not Delrin, Bob. It's not a thermal plastic. It responds very well to
high speed machining, and is, indeed, the best way to go, assuming the part
isn't too long. My feeling is that's the case in this instance, due in
part to the miniature equipment in use.

Harold