Knife Sharpening Mistakes: 8 Errors That Ruin Your Edge

Sharpening is not hard, but a few common mistakes turn a perfectly good blade into something that will not cut, chips easily, or wears out years early. Here are the eight sharpening errors most people make, why they hurt, and how to fix them.

1. Guessing the Angle

Most EDC folders are ground at 20 degrees per side, but many knives are different. Guessing produces an uneven bevel that cuts poorly and looks ugly. Check the manufacturer's spec, or find the existing bevel and match it with a marker test before you grind.

2. Using Too-Coarse Grit as a Finisher

A coarse stone (under 600 grit) removes metal fast, but leaves a ragged edge that folds over quickly. Finish on 1000-2000 grit or higher, then strop. A sharp knife is made in the finishing steps, not the rough ones.

3. Skipping Burr Removal

As you sharpen one side, metal rolls over to form a burr on the opposite edge. If you stop there, the knife feels sharp for one cut and then dies. Alternate light passes on each side and then remove the burr with a few edge-leading passes or a strop.

4. Pressing Too Hard

Heavy pressure digs the stone unevenly, creates a convex bevel, and can overheat thin blades. Let the stone do the work with light, consistent pressure, and use plenty of passes.

5. Overheating the Edge

High-speed belts and dry power grinders can heat the steel past its temper, softening the edge permanently. If the steel is too hot to touch comfortably, you have already done damage. Use light passes, keep the blade moving, and dip in water frequently.

6. Ignoring Steel Type

Hard, wear-resistant steels like S35VN, M390, or S90V need more time on abrasives and a slightly more obtuse angle to avoid chipping. Soft budget steels sharpen instantly but dull faster. One sharpening routine does not fit all steels, which is why it pays to match your approach to the blade.

7. Sharpening Coated Blades Wrong

DLC, PVD, and Cerakote coatings do not extend past the edge bevel. If you sharpen the coating itself, you expose raw steel and defeat the point. Keep the bevel free of coating, sharpen only the exposed edge, and never grind the coating off the flats.

8. Forgetting to Clean the Blade Afterward

Steel dust and stone slurry left on the blade cause rust spots and drag. Wipe the blade down, clean the pivot area, and apply a light coat of oil after every sharpening session.

Mistake Quick-Reference Table

Mistake	Result	Fix
Guessing the angle	Uneven bevel	Match the factory angle
Finishing too coarse	Edge folds quickly	Finish 1000+ grit, strop
Skipping burr removal	Edge dies after one cut	Remove the burr with light passes
Pressing too hard	Convex, uneven bevel	Light, consistent pressure
Overheating	Permanent soft edge	Slow down, cool the blade
Wrong angle for steel	Chips or rapid dulling	Adjust per steel hardness
Sharpening coatings	Exposed raw steel	Only sharpen the bevel
Leaving debris	Rust and drag	Clean and oil after

The Takeaway

Sharpening is a skill of restraint: match the angle, use a sensible grit progression, remove the burr, and do not overheat. Avoid these eight mistakes and any blade in your collection — from a budget folder to a premium sharpening stone routine — will reward you with a working edge. See the Artisan Cutlery folding knife collection for knives built to be sharpened and carried for years.

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