On 28 Feb 2005 18:49:38 -0800, "David Ford"
wrote:

Hmmm....that's interesting. Might work. Given I have a 10" blade on
my table saw, what angle would I need to do to emulate a 3" diameter.

The final height will be the "radius" = 1.5" so raise the blade this
high and measure across the blade.

Theoretically: If a 10" blade, the part hidden will be 8.5. Using
Pythagoras [can't get away from it] half that distance across will be
the square root of (10 squared - 8.5 squared). I get 5.2678269.

To get an effective total distance across of 3, you have to rotate
through an angle, and its cosine will be 1.5 / 5.2678269. This makes
the angle 73.5 degrees. You may need the complementry angle, 16.5
degrees.

Way past bed time here, so you'd better check it out yourself. Bear
in mind you won't have a circle shape, but an ellipse. Close enough.