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Sharpening a Misono Sujihiki

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ChristianT

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Hi all,

I tried to post this yesterday, but must have screwed something up. Sorry if my question ends up getting posted twice...

I need to sharpen my wife's Misono Sujihiki knife. It doesn't appear to have a bevel on the back, so I think it is a single bevel? I searched around a bit and found a video and some descriptions of uraoshi. I took a few swipes on the 8000 stone and it appears the back is convex - the middle is getting polished, but the edge and spine are untouched. So I am wondering how to proceed. I'm afraid if I try to flatten the entire back, I'll remove too much material. Should I just put a back bevel on it? Do these knives generally have convex backs?

Thanks,
Christian
 

Andrew H

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Put a bevel on the back, it's designed to be a single bevel knife.
 

tk59

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I have not seen one in person but I would be shocked if it was a single bevel. Sounds like the left side just has a tiny bevel from deburring. To sharpen, grind the right side until you get a burr and then deburr on the left. If you start to get steering, put a few extra strokes on the left side until you are comfortable with the performance.
 

JBroida

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Uraoshi is for true single bevel knives- Yanagiba, deba, usuba, etc.

Gyuto, sujihiki, petty, santoku, etc. will always be double bevel knives. You can sharpen asymmetrically, but dont do uraoshi on those knives.
 

Benuser

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What is different with Misonos is that they convex the edge of the back blade as well, and go far in doing so. I once found a 10 / 14 degree edge to be brought to 17 / 17. You don't have to follow that idea. Begin by removing the shoulder on the face side, work to the very edge and deburr the other side.
 

Eamon Burke

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It's an asymmetric edge that has been worn down. it used to have a tiny little bevel back there.
 

ThEoRy

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Sujihiki is a double bevel knife. Sharpen it as such.
 

Lefty

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Yup, what these guys said. Sometimes those back bevels are almost non-existent.
I like your wife's taste in knives, by the way.
 

ChristianT

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OK. Thanks everyone. Glad I asked. And glad I don't have to spend the next few hours grinding away at the back :).

Christian
 
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