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Bevel & Bone

HUB 02 · Sharpening

How to Sharpen a Boning Knife

A boning knife lives or dies by its edge. Here's how to sharpen the thin, narrow, sometimes-flexible blade cleanly on a stone — curve, tip and all.

By Stephen V.Updated How we choose
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A boning knife does precise, close work — separating meat from bone, trimming, filleting — and all of it depends on a keen edge and a fine point. The good news is that sharpening one uses the same whetstone method as a chef's knife; the only adjustments are for the blade's thin, narrow, curved shape and its pointed tip.

What's different about a boning knife

Three things. The blade is narrow, so there is less steel to hold and the angle can feel tippier — go slower. It has a pronounced curved belly and a fine point, so you have to follow the curve up to the tip rather than sharpening a straight edge. And some boning knives are flexible (for filleting), which means the blade can flex away from the stone under pressure — so you use a lighter, more controlled touchand let the abrasive do the work. A stiff boning knife sharpens much like any small chef's knife; a flexible one just needs a gentler hand.

What you'll need

A 1000/6000 combination stonecovers it — 1000 to sharpen, 6000 to refine — the same stone that handles the rest of your knives. Soak it if it is a soft water stone, and set it on a damp towel so it will not slide. A boning knife's edge angle is typically around 15–20° per side, like most Western knives.

Step by step

How to do it

  1. 01

    Prepare the stone

    Soak a soft water stone for 5 to 10 minutes until the bubbles stop (a splash-and-go ceramic or diamond plate just needs a splash). Set it on a damp towel or in its holder so it stays put.

  2. 02

    Set the angle and start on the coarse grit

    Lay the boning knife's edge on the 1000-grit side at about 15 to 20 degrees per side. Hold the angle steady and use a light touch - especially on a flexible blade, which can flex away from the stone if you press.

  3. 03

    Follow the curve up to the tip

    Sharpen in sections, sweeping along the edge and gently lifting the handle as you reach the curved belly and point so the whole edge stays in contact at the same angle. Don't let the fine tip dig in. Work until you feel a small burr along the entire other side.

  4. 04

    Sharpen the second side

    Flip the knife and repeat at the same angle, following the curve to the tip, until the burr flips to the first side. Keep both sides even so the edge stays centered.

  5. 05

    Refine on the fine grit

    Turn the stone to 6000 grit, lighten your pressure further, and make a few light passes per side to polish the edge and reduce the burr.

  6. 06

    Deburr and test

    Remove the last of the burr with a few very light alternating passes or a strop, then test on paper. A boning knife should bite in cleanly and have a keen, pointed tip for close work.

Keeping a boning knife keen between sharpenings

Because boning is close, precise work, the edge matters more here than on almost any other knife — a dull boning knife slips, which is both frustrating and dangerous when you are working around bone. Keep it aligned with a few light strokes on a honing steel between uses, and sharpen it on the stone when it starts to drag. If it will not take an edge at all, the cause is usually technique — a missing burr or a wandering angle — covered in why your knife won't get sharp. And treat it like any fine edge: keep it off bone-hard contact where you can, use a wood or plastic board, and dry it after use.

Questions

Frequently asked

How do you sharpen a boning knife?

The same way as a chef's knife, on a 1000/6000 stone at about 15–20° per side — but with a lighter touch and by following the curved belly up to the pointed tip. Raise and flip a burr, refine on 6000, then deburr. Flexible blades need an especially gentle hand.

What angle do you sharpen a boning knife?

Around 15–20° per side for a standard Western boning knife — the same range as a chef's knife. Holding a consistent angle matters more than the exact number. See knife sharpening angle.

Can you sharpen a flexible boning knife on a stone?

Yes — just use a lighter, more controlled touch, because a flexible blade will flex away from the stone if you press hard, giving an uneven edge. Let the abrasive do the work and keep the angle steady.

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Sources

We do not run a test kitchen, and we do not pretend to. Specs are the manufacturer's published figures, attributed as such; where we could not verify something, we say so on the page rather than quietly leaving it out. Read our full method.