Yes, try the carbide PCB drills. They're sharp and hard and will cut stuff that just laughs at high speed steel or even cobalt drills. BUT they are fragile and will break if you look at them sideways. You want to use them in a well centered chuck if you're using them on your lathe or a drill press with the part fixed so it can't move. I've drilled down to 0.6mm with them on my lathe.?
On Mar 22, 2025 at 2:41?PM -0400, Charles Kinzer <ckinzer@...>, wrote:
There are "printed circuit board drills" that I believe are carbide.
Amazon has inexpensive ones.? Professional industrial ones cost more.? The are all quite brittle and easy to break.? They are usually used in CNC machines with multiple heads doing multiple boards at one time.
Charles E. "Chuck" Kinzer
On Saturday, March 22, 2025 at 11:27:37 AM PDT, Jacques Savard via groups.io <jacquessavard@...> wrote:
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I have some cpu 486 or pentium vintage version
?
But impossible to drill a ho;e in the material
Normal drill for Metll Nothing
Drill Diamand for glass or stained glass Nothing
barely trace
Probably epoxy
tre
Do you have an idea please
Jack 47 71
it is exposy proly but very hard stouf
Any Advise Please
