How to Sharpen Serrated Knives

Serrated knives are designed to stay useful for a long time, which is one reason many people forget they need sharpening at all. The pointed teeth can continue gripping food even after parts of the edge begin to dull. Eventually, though, you may notice your bread knife tearing through a loaf, crushing tomatoes, or requiring more effort than it used to.

Sharpening a serrated knife is possible, but the process differs from that for a standard straight-edge blade. Understanding why can help you decide whether to tackle the job yourself or send it to a professional.

Why Serrated Knives Need a Different Approach

Look closely at a serrated knife, and you will notice a series of pointed teeth separated by curved grooves, often called scallops. Unlike a chef’s knife, you cannot simply run the entire edge across a flat sharpening stone.

Instead, each serration needs individual attention. The goal is to sharpen the beveled side of each groove while preserving the original shape of the blade. Removing too much material or using the wrong angle can change the serration pattern and affect how the knife cuts.

Use a Serrated Knife Sharpening Rod

If you decide to sharpen a serrated knife at home, you will typically need a tapered sharpening rod designed to fit inside the individual scallops.

The basic process looks like this:

• Find the beveled side of the serrated blade.
• Choose a section of the sharpening rod that fits the width of the scallop.
• Follow the existing angle rather than creating a new one.
• Make a few light strokes inside each serration.
• Work carefully from one scallop to the next.
• Remove any remaining burr very lightly from the flat side of the blade.

Patience matters here. Serrated knives are not a good candidate for aggressive sharpening, and you should avoid grinding away more metal than necessary.

Avoid Pull-Through Sharpeners

A traditional pull-through sharpener is generally not the right tool for a serrated blade. These devices are designed primarily for straight edges and cannot properly follow the individual grooves of a serrated knife.

Trying to force a serrated blade through one can damage the teeth or alter the shape of the edge. If you care about preserving the original geometry of the knife, a more controlled sharpening method is the better choice.

Know When to Leave It to a Professional

Sharpening each serration individually takes precision and the right equipment. If you are unsure about the angle, do not have the correct sharpening rod, or simply do not want to risk changing the blade geometry, professional sharpening is often the easier option.

It is also important to know exactly what kind of serrated knife you have. Sharpen Up 365 sharpens most bread knives and many other kitchen knives, but we do not sharpen double-serrated knives. If you are unsure whether your blade is accepted, check what we sharpen before placing an order.

Give Your Serrated Knives a Fresh Edge

You do not have to replace a favorite bread knife just because it no longer cuts the way it used to. Sharpen Up 365 makes professional sharpening easy with a simple mail-in sharpening process. Place your order online, receive a protective envelope, pack your knives using the materials provided, and send them in with the prepaid shipping label. Once your knives arrive, we sharpen them and prepare them for return so you can get back to slicing with less effort.