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Author: b1ueshift
Time: 01/16/04 15:54 PST
This is a reply to message no. 13004 by dfischer
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Gearing formulas
I found a very comprehensive gear info resource:

The pitch angle for a bevel gear is the angle between the pitch cone and a line normal to the shaft axis (or a radial line coming from the shaft).  A bevel gear with pitch angle of 90 degrees is a normal spur gear.

The root angle is similar to the pitch angle, only it's the angle between the root of the tooth profile and a radial line from the shaft.

The root angle will be slightly higher than the pitch angle.  The pitch angle for a miter gear is 45 deg, so the root angle will be slightly higher than 45 or 51 deg 33'.
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