Hand Tools Archive

Subject:
Re: studying edge failure...somewhat obscure

Steve Voigt
Hi Dave,
Thanks for the pics and all. One followup request: approximately what angle is the "long primary" on that Ward?
My two cents is that the issue is not really curved vs long primary/small secondary, but rather how steep the bevel (or tangent line to the bevel) is in the range from 1/64-1/16 above the bottom of the cap iron. I can't really tell, but I'm going to assume that on the Ward you have a very small bevel--curved or not--that is 50-ish. But right above that, the angle is quite shallow, certainly sub-30. The Butcher, on the other hand, looks to be steeper, above 30. That is the crux of the matter, I think.
I'm surprised that you would vary the geometry of the plane based on the cap iron. As you surely must know, it is much easier to reshape the cap iron. If the Butcher doesn't work as well as it should, a little time with grinder and file would fix it.

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