Originally Posted by
Del1r1um
Crazy... Not even a dent... Hmm I don't have a clue, do you use some kind of cutting oil? Shouldn't need it, but maybe it could help.
On a side note, i'd like to know what steps you take to make sure that your hole gets lined up to be perfectly perpendicular to the plane of the blade. I think many would be interested in this part of your process.