Alan, I definitely agree about using fine tooth burs. They are far
easier to control than high speed coarse tooth burs, and they can be
easily resharpened with a mild nitric acid dip. But I like to run
’em at high speed! I find that I have more control and I can use a
smaller bur…they just won’t grab when they’re running that fast. I
have to add, however, that it took me a while to learn how to do
this. It’s like riding a motorcycle over 100 mph…the first few
times will make you very nervous. Once you settle into it, it’s not
bad. It takes almost no pressure on the bur to cut a lot of metal.
You have to also learn never to slow down while you’re in contact
with the metal, or the bur will run all over the place.
Now, I have to remember to slow down when I’m teaching someone how
to use setting burs. I do not recommend this for anyone just
learning, but I do encourage people to increase their speed as their
skill increases. I’m sure that everyone has their own threshold
concerning speed. If you go too slowly, however, it is just as hard
to hold a bur steady as it is going too fast.