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Doug Ayen

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March Madness Meme [Mar. 7th, 2006|05:24 pm]
Doug Ayen
So. Have you ever wanted to ask me a question? Blacksmithing related, knifemaking related, personal, or anything else? Please allow me to prove my "Male Answer Syndrome" affliction!

--doug
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[User Picture]From: blackanvil
2006-03-08 02:42 pm (UTC)

false edge to real edge

First off, technically a "false edge" can be a real edge -- in a working knife or sword, a false edge is often as sharp as the real edge, though it doesn't have to be, and may just be a decorative bevel or one put on to reduce the weight of the blade.

Assuming I needed to turn a dull false edge to a 'real edge,' or I wanted to add a fully-sharp false edge to an existing blade, I'd use a belt grinder (I use two, a 5 hp homebuilt running at about 5000 feet per minute, and a Bader II 2hp with different drive wheels for speed control) to remove the metal required. Since presumably you're talking about an already-hardened and tempered blade, I'd use the BIII with a small drive wheel, and cool it early and often to avoid distempering the blade -- and switch to the water-cooled grinding wheel (old waterstone setup or Makita doughnut grinder) for the tip.

As I'm used to profiling blades from scratch, I'd have no problem regrinding a blade no matter how steep the bevel is. About the only thing that would stop me from sharpening up a false edge would be aesthetics, utility, or legality. Changing the angle or even the style of bevel is part of knifemaking. Even if I didn't want to change the grind lines, I could make a shallow, steep false edge very sharp by using, say, a 4' contact wheel and hollow grinding it.

Hope that answers your question.

--doug

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[User Picture]From: hrahen
2006-03-08 05:24 pm (UTC)

Re: false edge to real edge

Two of the three blades I'm considering it for are clip-point bowies. A Spyderco Perrin and a 6" blade Randall Model 5 Camp and Trail. The third is a spear-pointed survival knife. The Randall and survival knife definitely have the grinds for it. I'm not so sure about the Perrin. Unfortunately, my tools consist of a 1" X 30" belt grinder with a 5" contact wheel, a dremel multi-tool, some files, and a Spyderco Sharpmaker.

Legality is not an issue in my state. And I'm thinking having two edges will be useful in a camp knife.
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