Mike's comment on sensing pressure is spot on. Lube is also very
important. Many years ago, I got a great tip about a wonderful lube to
use on drill bits, especially small ones. Try using Elmer's glue...yes
the white stuff you used as a kid. The stuff has lard oil in it, sticks
to the bit and will blow your mind how well it works. I have been able
to drill hardened shafts to install a magnet for data-ack systems.
joe
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