Shouldnt be much difference. Derlin is quite hard (I think? - never actually used it) so the rough edges are caused by the drill chipping the derlin and being too slow. A high rpm grining tool would fix it.
Can someone tell me what types of bearings used in mills for side-loads?
Im building a small mill (maybe even CNC - I have the steppers Id need). When I said small, I mean small. Would not be much good for copper, but great for any plastic. The spindle motor would probablly be the 150w one from my dremmel...
