Quote Originally Posted by jimbowley View Post
How would I make the needed 5.4mm hole all the way through 25mm thick delrin? Would that simply be a 3mm mill (or 4mm ?) I'm not familiar with sizes yet and how deep you can go, so much to learn.
You could just buy a 5.4mm drill http://www.tooled-up.com/product/tro...i_YaApN58P8HAQ

..Clive