Using an electric knife sharpener means pulling a clean blade heel-first through the correct guide slots with light, even pressure, alternating sides as each model requires, then wiping the metal filings off before use.
Most electric sharpeners do the same job—coarse, fine, and sometimes a polish stage—but the specifics vary by brand. A dull blade on the first slot pulls differently than a nearly sharp one on the second. The key is knowing which stage fixes what, and the two mistakes that can wreck an edge faster than a dull knife.
If you’re still deciding which model fits your kitchen, our tested roundup of the best electric knife sharpeners for home cooks shows what actually performs.
How to Use an Electric Knife Sharpener in Practice
The core sequence is identical across most brands: set the machine on a flat, stable counter, plug it in, turn it on, then draw the blade from heel to tip through the designated slots with light downward pressure. Clean the knife first—food residue can gum the abrasives and make the blade skip.
- Stage 1 (coarse): for very dull or damaged edges. Alternate left and right passes until you feel a small burr form on the opposite side. Some models need 3–4 passes per side; others ask for 6–8.
- Stage 2 (fine): refines that edge. Usually 1–3 alternating pairs of pulls, enough to smooth the burr without taking off more metal.
- Stage 3 (polish/burr removal): present on sharpeners like the Chef’sChoice 15XV. Faster, lighter pulls—the manual for that model calls for 3 pairs, then 2 more quick pairs to check sharpness.
A Chef’sChoice 15XV tutorial shows the sequence cleanly: left slot of stage 1, alternating until a burr forms, then roughly 1–2 pairs on stage 2, then the short stage 3 routine. The 1520 variant is for 20-degree knives and uses 3–4 pulls per side before the final slot.
The Three-Pass Guide for Most Electric Sharpeners
Not all machines label stages the same way, but the underlying logic holds. Read your model’s manual first—some sharpeners are built for specific blade angles or knife styles, and a generic sequence can misalign the edge on a precision-ground blade.
| Stage | When to Use | Typical Pass Count |
|---|---|---|
| Coarse (repair) | Knife won’t cut a tomato; visible nicks | Alternate until a burr is felt |
| Fine (hone) | Knife cuts but drags | 1–3 alternating pairs |
| Polish (deburr) | After fine stage on any knife | 2–4 faster pairs |
The numbers on the sharpener correspond to these stages—always start at the highest number for the coarsest grit. The Chef’sChoice demonstration video (model 15XV) shows the full sequence in under two minutes, including how a burr feels when it’s ready for the next slot.
Common Mistakes That Ruin Your Edge
Most electric sharpener failures come from the same three habits. Too much pressure lets the blade skip over the abrasive, creating a jagged edge rather than a clean bevel. Sharpening one side more than the other pushes the edge off-center—it feels sharp in a pinch test but drifts when slicing. Skipping the final clean-up leaves metal filings on the blade that end up in your food; a quick wipe with a damp cloth, then a dry towel, fixes it.
Alternating passes matters. Many models require a left-pull then a right-pull; swapping sides on each stroke keeps the bevel symmetrical. The tutorials for the Triple Diamond and Linkyo sharpeners both emphasize this.
When the Obvious Fix Doesn’t Work
If your knife still isn’t sharp after the full coarse-to-polish sequence, check the blade angle. A 20-degree edge won’t fit properly in a sharpener designed for 15 degrees. The Chef’sChoice 1520 explicitly addresses this—it’s built for 20-degree knives, and any other angle will grind unevenly.
The other possibility: the sharpener’s abrasive discs are worn. Coarse and fine stages degrade with use, and a machine that once worked may now just skate over the blade. Most manufacturers recommend replacing the sharpener after a certain number of uses (usually stated in the manual).
Post-sharpening, wash the knife with soap and water, then dry it. The metal shavings are fine enough to look like dust, but they’ll dull the edge again if left on.
FAQs
Do I push or pull the knife through an electric sharpener?
Pull toward you from the heel to the tip. Pushing forward can jam the blade or misalign it in the guide slot, and the abrasive rotates in only one direction on most models.
Can you ruin a knife with an electric sharpener?
Yes. Too many passes on the coarse stage will remove more metal than needed, and sharpening at the wrong angle for the blade can permanently alter the edge geometry. Stick to the manufacturer’s pass count and check progress often.
How many times should you run a knife through an electric sharpener?
It depends on the stage. Coarse passes require 3–6 per side until a burr forms; fine passes need 1–3 pairs; the polish stage only 2–4 fast pulls. Running a sharp knife through the coarse slot unnecessarily wears down the blade.
References & Sources
- Chef’sChoice. “Model 15XV Electric Knife Sharpener Demonstration.” Shows the three-stage sequence with exact pull counts.
- Good Life Eats. “How to Use an Electric Knife Sharpener.” General guide covering preparation, technique, and common mistakes.
- Knife Helper. “How to Use an Electric Knife Sharpener – The Complete Guide.” Covers safety, model differences, and stage logic.
- YouTube – Chef’sChoice 1520. “Chef’s Choice 1520 Sharpener Tutorial.” Specific guidance for 20-degree knives and the final burr-removal slot.
Mo Maruf
I created WellFizz to bridge the gap between vague wellness advice and actionable solutions. My mission is simple: to decode the research and give you practical tools you can actually use.
Beyond the data, I am a passionate traveler. I believe that stepping away from the screen to explore new environments is essential for mental clarity and physical vitality.