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Thread: Convex sharpening techniques?

  1. #1
    Member mattdw's Avatar
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    Question Convex sharpening techniques?

    I have a couple of convex-edged knives (a Svord boning knife and a converted Green River skinner) that I just cannot figure out how to get and keep a good edge on. I have no trouble getting my other knives nice and sharp with an oilstone, but I cannot find a system that works for me on convex blades.

    Currently I'm stropping over 600-1000 grit wet-and-dry sandpaper, but I cannot get the edge anywhere near as sharp as I'd expect, and it lasts about 5 min before it's blunt again. I've tried a couple of different strokes/angles and padding materials under the paper (based on YouTube tutorials), but my results only ever vary between 'poor' and 'average', so I must be missing something.

    Those of you with convex knives, how are you keeping the edge sharp? What techniques are you using, and are there any good resources you can point me at? Thanks.

  2. #2
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    Have a yarn to your local butcher or homekill guy.
    I had a mate who owned the local home kill and he used clean mine up for me.
    They would probably do it for you and give you a bit of advice as well.
    mattdw likes this.

  3. #3
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    You might need a 21% or 23% edge to fully get a sharp edge on the Svord.We use a Svord drop point as our night knife .It is wickedly sharp.Look at www.scarysharp.co.nz.It will solve all your problems.Geoff is a top bloke.The Green River is like a Victorinox. You will need a 23% for best results.

  4. #4
    Almost literate. veitnamcam's Avatar
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    Sharpen it at a very shallow angle keeping it constant until you get rid of that horrible barstard round shoulder on both sides then increase the angle and very lightly put a micro bevel on it.
    You just made a knife out of a bit of round bar
    There is a reason virtually every modern thing that cuts lots is sharpend this way

    Sent from my GT-S5360T using Tapatalk 2
    mattdw likes this.
    "Hunting and fishing" fucking over licenced firearms owners since ages ago.

  5. #5
    Member mattdw's Avatar
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    Quote Originally Posted by TeRei View Post
    You might need a 21% or 23% edge to fully get a sharp edge on the Svord. We use a Svord drop point as our night knife .It is wickedly sharp.Look at www.scarysharp.co.nz.It will solve all your problems.Geoff is a top bloke.The Green River is like a Victorinox. You will need a 23% for best results.
    Does your svord have a convex edge still? "Scary sharp" would gradually turn it back to a traditional bevel, wouldn't it?

    Quote Originally Posted by veitnamcam View Post
    There is a reason virtually every modern thing that cuts lots is sharpend this way
    The convex evangelists claim that that's just because bevels are easier to machine in the factory I'm unimpressed with convex edges so far, but people rave about them so much…

  6. #6
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    throw it on the tormek, and set it to any angle you desire

 

 

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