How to Sharpen Knives

This simple, sure technique requires only two inexpensive tools

Sharpen knives quickly and keep them that way with two simple, inexpensive tools, several easy-to-learn techniques and a little practice. It'll make kitchen food preparation much quicker and easier too.

By the DIY experts of The Family Handyman Magazine

Must-have tool #1: A sharpener

Joe Gamache, our expert cutler, says there are hundreds of devices, techniques and theories about knife sharpening. Some sharpening methods are arcane; some ridiculously complicated. Still others are only for those obsessed with incredibly sharp edges, and require investing a boatload of money in gadgets.

But Joe has a quick, drop-dead simple approach that he's been teaching to amateurs for years. You'll only need a couple of inexpensive sharpening tools and a bit of practice. Master it and you'll be amazed at how well your knives perform and how much more fun food prep, carving, slicing and peeling can be. Or at least how much less painful.

Sharpener choices
Joe suggests either of two choices for a sharpener: a V-sharpener or, if you're a more serious cutler, a stick sharpener. Each has two sharpening surfaces, one for roughing out an edge and the other for the final edge. Both styles are easy to use. But the stick sharpener will probably last your entire life. And with that style you'll look pretty impressive when your guests watch you sharpen your knife before carving up the roast.

A stick sharpener comes with a pair of fine ceramic sticks and a carbide notch for roughing (Photo 1). To use it, simply hold the knife edge down while you drag it across and down the stick surfaces. Shown is Smith's 3-in-1 Sharpener ($20), one of Joe's favorites.

A V-sharpener has two pairs of cutting edges in a V-configuration (Photo 2). One side is made from carbide for roughing out an edge and the other has ceramic material for fine-tuning the edge. The “V” grinds both sides of the knife at once. This Wusthof two-stage sharpener costs $20.

Meet the Pro! Joe Gamache

Joe has sharpened well over 1million knives in the past 20 years. And believe it or not, he's only needed 16 stitches. That's less than a stitch a year! He'll show you how to safely achieve sharp edges without any trips to the ER.

Joe says, “To get and keep your knives sharp and true, you'll absolutely need two tools: a sharpener and a steel.”

Photo of Joe Gamache Joe Gamache
Back to Top

Must-have tool #2: A steel

A steel is the shorthand term for a steel rod used to straighten knife edges. Any decent knife set includes one, but few people know exactly what it does, much less how to properly use it. If you don't have a steel, go buy one for about $20. Joe will show you how to use it to maintain a sharp edge. Don't waste your money getting a diamond-coated surface. You don't need it.

All the sharpening tools you'll need are available anywhere knives are sold. Go online and search for specific products or generic tool names. Or just visit Joe's store at eversharpknives.com.

Back to Top

3 Steps to sharp

Go for good enough— not perfection!
Super-sharp edges are great—at first. Then the razor edge quickly dulls. That's because an edge that sharp is necessarily very thin, and it bends and dulls easily because there's not enough metal to support it. A knife that'll easily slice through food is sharp enough. The tomato test (below) will tell you when a knife is ready for food prep.

Follow Photos 1 – 3 for the 3-step sharpening process. After sharpening and before any food prep, wipe off the blade with a cloth to remove any metal filings.

Joe says, “Don't strive for razor-sharp edges—'sharp-enough' edges stay sharp longer.”

When to take your knives to a pro
If you follow Joe's instructions and still can't get a good edge, chances are your knives have been abused to the point that they need a pro's touch to restore the edge. You can do it yourself, but it takes expensive electric tools or a lot of tricky manual grinding on a stone. But for well under $10 per knife, a sharpening shop can bring your edges to better-than-new condition. Then you'll be able to keep them that way using Joe's techniques. Search online for “knife sharpening” followed by your city and you'll surely find a local sharpener. And don't give up on high-quality knives that have a chip or notch in the blade. A pro can grind out any imperfections and reshape the edge. Yes, you'll have a slightly narrower blade, but you won't even notice.

Joe says, “If you cook five meals a week, take your knives to a pro for a tune-up once or twice a year.”

Back to Top

Use a steel—often!

Steeling restores the edge
Chefs and meat cutters frequently pause and “steel” their cutting edges. Steeling doesn't sharpen an edge; it straightens it. That's necessary because the thin edge actually bends or warps while you're cutting. If you could see the edge under a microscope, it would look wavy, and it would feel dull while cutting. Steeling the knife straightens out all those waves to restore a straight, even cutting edge. So when your knife begins to seem dull, don't sharpen it—steel it first. Every time you grab a knife for the first time to begin cutting, steel it before you even get started. But it's important to do it right or you'll just make the edge worse. And don't act like one of the Iron Chefs on TV and do it all up in the air—you'll eventually wind up in the ER. Rest the end of the steel on a cutting board and do your steeling the safer and more accurate way. It's very important that you steel at an angle between 20 and 30 degrees. Photo 1 shows you how to figure that out.

If your knife isn't restored by steeling, you may need to hit the fine ceramic stone a few times. You should rarely need the coarse notch after your knife is properly sharpened. That is, unless you've wrecked the edge by cutting on a too-hard surface or trying to hog your way through a bone. If that's the case, you'll have to hit the coarse and then the fine.

Joe says, “The steel keeps a knife sharp.”

The Purpose of Steeling

Photo A shows what your knife edge looks like after a dinner's worth of cutting—all bent and wavy.“ Photo B shows what your knife edge looks like after steeling. The edge is straight and ready for cutting again.”

Fingers crossed Photo A: Wavy edge
Fingers even Photo B: Even edge
Back to Top

The tomato test for sharpness

Joe says, “Tomato skins are the perfect way to test for sharpness.”

If you can slice through a tomato skin without having to saw your way through or poke a starter hole with the knife tip, you have a sharp edge that's ready for food prep.

Cutting-Edge Tips From Joe

Cutting boards:
Drag the tip of your knife across your cutting board. If the surface doesn't scratch, it's too hard and it'll dull your knife in no time. Some plastics and certainly glass and laminate surfaces won't pass the test, even if they're called “cutting boards” on the label.

Acidic foods:
Rinse knives after cutting acidic foods like citrus fruits or pickled goods. Acid promotes corrosion right at the cutting edge, even with stainless steel. Dry them right afterward.

Cleaning:
Don't ever throw knives in a dishwasher. Wooden handles will get ruined, and even stainless steel blades will corrode and get dull. Instead, wash your knives by hand and dry them off right away.

Protect the edges:
Don't just toss unprotected knives into a drawer. Either use a knife block or stow them away with blade protectors. Simple cardboard sheaths held together with duct tape will do the job.

Avoid bones:
They'll dull even a high-quality knife. Electric sharpeners: Don't ever use a cheap electric knife sharpener, especially the ones found on electric can openers. They'll do more harm than good. If you love gadgets, spend at least $125 for a decent electric sharpener. (You'll still have to steel your knives, by the way.)

Other knives:
“I sharpen all knives the same way— hunting knives, fillet knives, what ever. Keep a mini sharpener in your tackle box and use the same techniques.”

Editor's Note:Check out Joe's store at eversharpknives.com for information on mail-order sharpening, tools and more. These guys really know their stuff!

Joe Joe Gamache
Sliced orange

Photo courtesy of Getty/Photodisc

Acidic foods promote corrosion
Mini sharpener Mini sharpener
Field Editors Talk Knives

Our Field Editors use (and abuse) knives for everything, everywhere. Here are a few of their comments:

I love my Tormek T-7 water-cooled sharpening system ($600 at tormek.com). It's very easy to get an extremely sharp edge on knives, and especially woodworking tools.
Andrew Pitonyak

[Editor's note: We received four endorsements of this sharpener, but $600? Yikes!]

Being a former Marine, I think the best and most reliable knife is the Ka-Bar knife (kabar.com). I bought one at the local army surplus store. Make sure it isn't a replica and you'll have a tough knife that works for everything.
Dave Youngblood

I know exactly where my beloved Schrade pocket knife has been for the past 20 years, even though I haven't seen it once in that time. The kitchen pipes were freezing at a customer's house. Because the pipes were impossible to get at from the inside, I opened up the wall, did some foam insulating, and then replaced the sheathing, siding and trim. I also touched up all the paint. Guess what got left inside the wall?
Steve Vaalor

For the ultimate Swiss Army knife, check out the Swiss Army Giant ($1,000 at swissknifeshop.com). It has all 87 implements! I can't imagine trying to hold it while using any of them, however.
David Hawkins

Swiss army knife

Photo courtesy of Wenger

Swiss Army Giant
Back to Top