work on one side at a time, obviously the same hand position on each. when
done the geometry on one side is the same as the other. When looking at the
very end you should see a straight line, the "peak" should divide the
geometry exactly, meaning both sides are the same. It needs the angle
measured co-axial from the peak through to the cutting edge, what 118 for
std material, and also some backard clearance, what 9 degrees. In practice
for most wood, if it looks good, and equal, alls well. The cutting lip
should be sharp along its entire path while spinning. Often easier by hand.
Machinery's Handbook tells you how to make the tooling after doing the
calculations for actually making all the geometry correct for something so
simple.



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