"Owen Lawrence" wrote in message
Oh, man! Now you've got me wondering exactly what "sudden impact" could
possibly mean. At 20k RPM I would think almost everything happens
suddenly.
The carbide on router bits can break when they're accidentally dropped on
the floor. That's the type of sudden impact that I had in mind. Carbide is
extremely hard in one respect, but it has some weaknesses in other respects.
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