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The Ultimate Guide to Sharpening Serrated Knives (Plus Video Walkthrough)

I’m sure you know what serrated knives are so, we’re supposed to be more concerned about its sharpening. But in case you don’t know, I will briefly explain.

Serrated knives are basically used for slicing soft foods, vegetables, and fruits without destroying the food. It comes in different sizes and the long ones “20 -25 cm” are usually used for cutting bread while the shorter ones “13-16 cm” are used for cutting vegetables.

According to Wikipedia, a serrated blade is a type of blade used on saws and on some knives or scissors. It is also known as a dentated, saw-tooth, or toothed blade

Furthermore, serrated knives are better suited for tasks that require aggressive sawing motions. They come in different types having different kinds of teeth such as curved or pointed.

These types of knives are usually very tricky due to the concave shape between the serrations and because of this, it’s usually impossible to sharpen them the way you sharpen other types of knives.

However, it might interest you to know that cuts made with a serrated knife are usually less smooth and precise than the one made with a smooth blade. Serrated knives can be more difficult to sharpen using a whetstone or rotary sharpener than a non-serrated; however, they can be easily sharpened with a diamond sharpening rod.

Some of the differences between serrated blades and straight edged blades are…

  1. Serrated blades tend to stay sharper longer than a similar straight edged blade.
  2. A serrated blade has a faster cut but a plain edge has a cleaner cut.

Sharpening Serrated Knives


Most people often view the sharpening of serrated knives as a tedious and unnecessary task. Some will even claim that the reason why they’re using serrated knives is that, it does not require sharpening but, this is a big lie.

In fact, I will advise that you spend more of your time in maintaining your serrated blades than plain edged blades. This is because serrated knives when blunt can be tearing and damaging your food while you’re trying to cut it.

However, finding the best device to sharpen serrated knives can be quite complicated because, serration comes from different manufacturers shapes, sizes and scallops and, it’s not always easy to find a single tool that can sharpen all of them.

Furthermore, sharpening serrated knives require an abrasive material or a specially-shaped sharpener and a different sharpening method. The serrated edge of the blade has notches or teeth like the cutting edge of a saw.  In a nutshell, this edge will work better for slicing cuts especially through hard or rough surfaces where the serrations tend to grab and pierce the surface quickly.

Serrated blades require a tapered rod or triangular-shaped surface to sharpen.  These unique shapes allow you to sharpen the whole cutting edge of the serration as well as the tips.  If you use a flat stone to sharpen serrations, you can only sharpen the tips of the serrations.

  • Normally, serrations have a grind on one side of the blade only.  Sharpen the grind side only.
  • If you are NOT using a sharpener with fixed angles, hold the sharpener at the angle that matches the original edge angle.  Fixed angle sharpeners eliminate this requirement.
  • If using a tapered rod style sharpener, put the pointed, narrow end of the sharpener up against the serration and stroke the sharpener into the serration—away from the edge of the blade, toward the spine. Stop stroking when the width of the taper sharpener gets to the same width as the serration (do not enlarge the width of the serration)
  • Rotate (spin) the sharpener as you go for even, consistent sharpening.
  • Check progress and continue until sharp.
NOTE:  Sharpening serrations on a flat stone will only sharpen the tips of the serrations.  Although not optimal, just sharpening the tips alone will improve results. (Source)

Tool Needed For  Serrated Knives Sharpening

There are many tools out there that you can use to sharpen this kind of knives but, the one most people prefer using is the DMT FSKF Diafold Serrated Knife Sharpener.

If you have serrated knives then, I’m sure you will need this tool because; it will certainly make the sharpening much easier for you.

I’ve already written a review of this tool before so, just check it out here.

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I'm a 27 years old graduate of Telecommunication engineering who loves exploring now things especially the tools, gadgets, and products needed in a home. I want to create the best home possible, complete with everything that a good home should have. I know It's going to cost me money, but who cares?

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