Thread: How Bevel is Affected by Taping

Originally Posted by hoglahoo

Brad,

How you measured A has me baffled! If you measured directly between the point where the bevel meets the flat surface and the edge of the blade, then you didn't measure A, you measured the hypotenuse as Jimbo noted. (although the angle is so small, the results should be very close either way - where's my calculator?) If you indeed measured A, then where on the razor did you actually place the plastic scale? I may be wrong (to borrow a qualifier from Jimbo) but I don't think there is anywhere on the razor you can place a plastic scale to get an accurate reading for A. Is A really as it appears in the diagram, or are the vertical lines denoting A not supposed to be directly vertical?

Thank you for your upcoming correction!

A as hypotenuse ...... A as adjacent

Lee,

Wow what a great diagram you made. I guess this is done with some CAD program? I am so ignorant I can barely function in this world. You and the other folks of this community are teaching me alot about alot.

Anyway, what I did is closer to your diagram to the right, "A as adjacent". I say closer becauase it is a crude measurement used only as a reference point in a calculation. I layed a plastic drafting scale on the side of the blade and measured (to the nearest sixteenth) from the edge to the thickest point (what contacts the hone surface). I then measured the thickest point of the spine with a digital caliper and divided that by two so that the blade is essentially split longitudinally into two equal triangles. I did not do this to get the actual angle of the razor's edge. Does anyone really care what that is? One has only to look at a full hollow to know it is a pretty shallow angle. I did this exercise to quantify the difference an additional .007" added to the spine of a razor being honed would make. While you guys may argue the measurement is actually hypotenuse as opposed to adjacent, I think you'll find that with such a shallow triangle, that point is moot. Now I may be wrong but I believe, in this case, what is important is the delta.

Am I wrong?

Brad