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 Post subject: Bevel Information
PostPosted: Sun Jun 15, 2014 2:34 pm 

Joined: Fri Mar 07, 2014 9:57 pm
Posts: 152
Location: Central Illinois
Is there any good resource to find what type of bevel geometry a particular knife brand is ground with such as 70/30, 60/40, 50/50? I JKI does list this information for the lines they sell. I am interested in which lines have a 50/50 bevel.


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 Post subject: Re: Bevel Information
PostPosted: Mon Jun 16, 2014 2:48 pm 
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None that I'm aware of....no.

Most anything made by Lamson for CKTG will be. So the Artifex, the Ultimatum, and the Addict will all be.

Some other knives will be as well. I believe most of Takeda's stuff is 50/50 ground.

BTW, anything 60/40 ground is so close that I wouldn't worry about it at all.



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 Post subject: Re: Bevel Information
PostPosted: Mon Jun 16, 2014 3:10 pm 
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The Masakage lines and the Testuhiro Hammered are listed as 50/50.

Adam and Craig - I guess proper nomenclature is justified here. Are we talking about the edge bevel itself versus the overall blade grind/geometry of the right/left blade faces?

If it's just the edge bevel, with a few exceptions, as a lefty, I haven't noticed much in the way of steering with the knives I've used. There have been a few, either with like 90/10 edge bevels, or blade geometry that's quite a bit flatter on the left and much more convexed on the right.


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 Post subject: Re: Bevel Information
PostPosted: Mon Jun 16, 2014 3:18 pm 
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I'm talking about knife grind.....not edge grind. Edge grind should follow knife grind.



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 Post subject: Re: Bevel Information
PostPosted: Mon Jun 16, 2014 3:30 pm 
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OK Adam. Let's see if I can get this straight once and for all. I still have questions :-).

So let's say you have a knife where the right side has a fair amount of convex to the grind and the left side is much flatter from spine to edge. This the most common geometry I've noticed, aside from more 50/50 grinds. How should the edge bevel be ground - I'm talking how much asymmetry and what angles relative to each other? In a nutshell how should edge grind follow blade grind?

Thanks Adam!


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 Post subject: Re: Bevel Information
PostPosted: Mon Jun 16, 2014 3:36 pm 
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If a knife is ground 70/30 (as an example only), the edge should be ground 70/30. Doesn't matter if it's convexed or flat. The center line of the knife grind needs to line up with the center line of the edge. When it's not, it can affect performance.

All that said, in most knives ground 60/40 or 70/30 having the edge off axis a little bit doesn't affect the performance at all. It's when someone takes a 60/40 knife and grinds the bevel 90/10.....or a 90/10 knife and grinds it 50/50....that issues start showing in cutting ability. At the end of the day, if you're very in tune with the performance of your knife, you'll notice changes easier than most people. Race car drivers notice the slightest changes in their high performance cars.......most drivers don't know when a wheel has fallen off. :o



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