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Allowing for a radiused toolbit

Here's the math behind compensating for the radius on the end of the toolbit, r represents the radius of the toolbit. Given r and the angle (30 degrees) we know that sin(30) = r / h. So h = r / sin( 30 ). What we really want is c, which is amount that we need to compensate for when using a radiused toolbit versus a sharp pointed toolbit.

c = h - r = r / sin(30) - r = r / 0.5 - r = 2r - r = r.

That was a lot of work to come up with a simple answer. Bigger...

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