Drilling Brass
Using Brass to prevent drilling? How does that help? Drilling Brass is slightly more tricky than steel but with the right drill and the right technique it's perfectly straightforward - I've seen it done in the engineering factory I worked at years ago. Don't try it with a normal drill though, it will jam.
You chamfer the leading edge of the drill so it's a blunt chisel rather than a sharp edge. This breaks off the brass in small chunks rather than the spiral swarf you get with steel, so you have to keep withdrawing the drill to clear those chunks. Then it just works.
You'd presumably need to swap out the drill when you hit a different material so it makes it a bit more slow and tricky, but surely not massively so?
Biting the hand that feeds IT
