A knife fuller does more than just cut the weight of your knife. It removes excess material that is not essential for its core, giving the knife a better balance and appearing solid, sharp, and appealing without compromising its steel blade.

On the other hand, the best chinese cleaver with a fuller will appear even lighter and thinner since it has been trimmed down in size while still leaving enough material on the blade to avoid cutting quality-related corners!

There are numerous misunderstandings about what a fuller does on a knife or sword, but our post will dispel all of them. We will go over the key advantages of fullers and some misconceptions around them. Let’s explore!

Fuller On A Knife: What Is It?

This tool is a furrow forged or carved into a blade’s length. Blades can have a single fuller on sides, numerous fullers on sides, or a varied quantity on each side.

It’s sometimes known as blood grooves, associated with various tales. On the other hand, the primary objective of tools is to eliminate stock from a cleaver without affecting its structure.

Before proceeding further, it’s crucial to note that blood grooves aren’t necessary for all knives.

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What Does A Fuller Do With A Knife?

It acts as an airway, creating added diffusion and making the blade stronger. However, this tool is only used to decorate blades less than 12 inches long. It is because 12-inch knives and smaller ones are not stiff and do not shed a great deal of weight after use.

On the other hand, adding it to short blades may result in a less sharp grind angle. This shortcoming may work fine for small chores. However, it won’t perform as well when heavier tasks like splitting a bone or cutting through thick skin.

The same may be said with hunting knives. There’s nothing else to it beyond mimicking the appearance of a superb blade.

Adding a blood groove to these knives would result in a negligible weight decrease or stiffness.

In the case of knives with lengths exceeding 12 inches, what is a fuller for? You might expect three significant advantages following:

1. Make the blade lighter

More specifically, it’s a process in which metal is removed from the inside of a blade. Since the cleaver is made thinner after applying a tool, this technique is lighter yet sturdy. After adding, this process may lower its weight by 25% to 30%.

In the same way, a blood groove decreases the weight of a cleaver without sacrificing its integrity or strength. As a result, the blade will be almost as powerful as before the tool was added.

2. Improve the blade’s stability.

This tool improves cleaver knife stability by offering new balancing qualities to steel knives.

The basic philosophy of a cleaver is that it bends rather than breaks. Therefore, the closer one gets towards the middle of the sword, the more stable it feels. As a result, the blade seems lighter but also more sturdy.

3. Enhance the blade’s appearance.

A fullered cleaver is not only professional but also fashionable. This is an advantage in most cases, but especially so when it comes to hunting or survival knives because both of these situations demand the use of high-quality blades.

Master craftspeople know this all too well, which is why grooves are featured on their most beautiful creations as a marketing ploy and for the decoration of profitable blades.

Furthermore, you may personalize your unusual knife designs using various tools. Its grooves can help hide welded-steel flaws. As a result, it’s a good approach for masking contaminants on blades.

What Role Does A Fuller Do With A Sword?

It lightens the sword while retaining the structural integrity and strength of the tool. Another motive is to modify the sword blades’ sound to offer the wielder. So this idea helps in keeping the weapon from getting damaged during a fight or otherwise.

Katanas are an excellent example of a sword that demonstrates this notion. The blades of these swords feature fullers on the sides. As a result, the sword may generate a variety of noises when being swung.

If the sword user only hears one whistle while swinging, the weapon has been honed and brought to a point. If there are two whistles, the cleaver cuts in two places: along the edge and in one of the grooves.

Finally, if a user hears 3 whistles when swinging his sword, this means that both the knife and direction of motion have been aligned correctly to allow for smooth cutting.

Is Fuller & Blood Groove The Same Thing?

Blood grooves and fuller are synonymous, yet there is a frequent misconception. For example, some individuals think that the blood groove makes the blades more dangerous because blood is more easily drained from a cut.

After being stabbed with the cleaver, the skin quickly contracts and shuts around it, causing blood to flow neither slower nor faster. Both accomplish three things: weight reduction, strength improvement, and cosmetic enhancement.

How Do You Attach A Fuller To A Knife?

You can apply this tool in one of three ways following:


Forging a cleaver requires tools just as any other process does. For example, many forge sets contain hammers, fullering, and beveling dies, among others.

Start by heat treating your cleaver to enhance the durability of your final product before forging it in one or two steps. If done correctly, you’ll create an even stronger knife!


Alternatively, you may use a suitable size wheel installed on the belt grinder or even a rock. Grinders produce uniformly thin and full blades.


You might carve with sharp-bladed fullering tools. These appliances are comparable to hand planes, commonly used in woodworking. It is also feasible to carve a fuller using a specialized scraper, but this will take a long time.

Final Thoughts

After doing all the research, we’ve found that the fuller is used to lighten the Chinese cleaver. It is often used on battle swords, as they are heavier and require extra help to keep them balanced. We hope you found our content informative! Thank you for taking the time to read!

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