I am drilling this aluminum sheet:
This is a holder for a (almost complete by 1/64) set od DA collets
that I have in a bag.
Unfortunately, when drilling, it flexes more than I would like. It is
under control but I now realize that I should have used some
sacrificial backing material, or a step drill.
The question is, what material is friendly to the mill. I thought that
wood (plywood) was somehow bad.
11 years ago