Ignoramus17939 wrote:

I am parting out a PCB drilling CNC machine. Inside of it, there is a
good pile of a few lbs of carbide "PCB Drills". These are tiny drills
and perhaps end mills, with what looks like 1/8" shanks.

I wonder if there is any non-PCB use for them. I do realize that these
carbide drills can only be used in CNC equipment, and I have a CNC
milling machine. Trying to think of any good use cases but can't.

i
Yes, they can drill aluminum and brass, even do deep drilling if you peck
it. High spindle RPM is best, but you can do it at slower speed if you keep
the feed slow.

They can actually be used in a micro hand drill press, but you have to be
very careful.

You will find lots of people selling these on eBay and such.

I have a drawer full of them, and use them for certain projects.

Jon