Spyderco Knife Blades – Blade Grinds & Edge Grinds

 

Spyderco, Inc. is known for its quality knives, all over the world. The company was established in 1976 by Sal Glesser, and it continues to do great business. Spyderco has set the standard for folding knives. In the course of 40 years of operation, Spyderco has made significant contributions to the steel- & knife-making industries. It has innovated the use of certain blade steels, acquired a whopping 86 patents, kept its ear open to customers and collaborators, consistently improved its designs, and greatly affected other areas within that unique and ancient craft which is knife-making.

A knife is essentially a cutting tool. And what is it which constitutes a cutting tool? More often than not, it is a blade. And, when discussing blades, the blade’s steel is the most important factor. If the steel isn’t good, there is a good chance of the knife being a dud. It may have a handcrafted, gold-plated, diamond-encrusted, billion-dollar handle. But, if the blade is no good, it may turn out to be a glorified piece of junk.

If the blade's no good, I don't care how many diamonds are on your knife

If the blade’s no good, I don’t care how many diamonds are on your knife

This statement is not meant to knock anyone who uses low grade knives. Studies have shown that 9 out of 10 individuals who use a knife feel it should be made of materials which are not junk. Well, okay, I made that up, but the point remains – a quality knife should be made of high grade materials.

Spyderco offers knife models with different grinds on the blade. Varying blade properties are obtainable by changing the blade’s grind, which is why some models come with several grind options.

A blade’s grind is defined as “the shape of the cross-section of the blade”. Grinds differ, and they highly depend on what the blade is to be used for, as well as the material from which the blade is made. Much like blade steels themselves, there is no ‘best’ grind. The quality of a certain grind is completely subjective to its designated use.

Types of Blade Grinds

Hollow: The blade has bevels (slanted surfaces or edges) with a curve. It looks as though some of the steel has been hollowed out, which is why it carries this name. The bevels may extend the full width of the blade (which would make it a full hollow grind) or only a portion of its width (which would make it a hollow grind). Due to their unique shape, hollow ground blades are known as excellent slicers. On the other hand, you wouldn’t want to use a hollow-ground knife for batoning or heavy chopping.

Full Flat: The blade has flat bevels. They extend from the spine all the way to the cutting edge. This grind has less drag when cutting, and it helps the knife weigh less. Many kitchen knife blades are made with a full flat grind.

Common Blade Grinds

Common Blade Grinds

Saber: Also called a V grind. It is a blade ground with flat bevels that extend from the centerline of the blade to the cutting edge. It resembles a flat grind, but instead of it being flat from the spine, it becomes ground from the middle. This grind has a big advantage – because the grinding only begins halfway, it maintains a full thickness through the spine-to-middle portion of the blade, making it stronger and more heavy-duty oriented.

Chisel: Also called a single-bevel grind, this describes a blade that is beveled on only one side. It may be flat ground or hollow ground. The other side is completely flat, with no ground whatsoever. This polarizing grind is very common in Oriental kitchen knives.

Convex: It resembles the flat grind, only instead of the blade being flat, it is curved outwards. It has an arch-like shape. This means that there is a lot of material on it, extending from the spine all the way to the primary bevel, at which point it slants down to create the initial edge. The main benefit of this type of grind is the amount of strength that it carries. It is a heavy knife, and it can be used for heavy jobs. When properly sharpened, a convex-ground knife can be incredibly versatile.

Scandi: Also named ‘Scandinavian’ or ‘zero ground saber’, this grind is similar to a flat-ground saber, but without a secondary bevel at the cutting edge. The plane of the bevel continues to create the cutting edge. No angle changes are made to create an edge. In other words, that single bevel is one continuous edge. It makes it an excellent cutter and slicer, which is why is has been traditionally used in the harsher climates of Norway, Sweden, Finland, and other areas of Scandinavia.

Flase Edge / Wedge: A secondary edge (or potential for an edge) which is located at the spine of a blade, close to the point. If sharpened, it is called a false edge. If unsharpened, it is called a swedge. The main reasons for having it as part of the design are A) aesthetics, B) to lighten the weight on heavier blades, and C) a swedge improves the knife’s ability to penetrate.

Centerline: In a cross section, this blade would look like this: <>. It closely resembles a diamond. The grind is reminiscent of a double-edged knife, but only the bottom edge is sharpened. The spine of the knife is left unsharpened, and it creates a swedge.

Hamaguri: The name Hamaguri is Japanese for “clamshell”. It is a blade ground with convex bevels, and it is also called an Appleseed or Moran grind. This type of grind is produced by grinding on a slack grinding belt. It has very sharp edge and a very thick edge. This creates a knife with a sharp edge, which is also very durable.

Zero: A grind without the secondary bevel at the cutting edge. In this way, it is similar to a scandi. The plane of the bevel extends from the spine, then continues to create the cutting edge.

These are the main blade grinds which a user may encounter. There are some other ones, perhaps, but these are the most popular. As you can see, different grinds serve different purposes. Some are good for chopping and cutting, others for slicing and carving. Again, it is best to know what the designation of the knife will be, before settling on a specific blade grind.

The knife bevels are what lead towards an edge, but the edge itself could have one of several grinds. When it comes to Spyderco knife blades, they have their own trademarked names for the various edges.

Spyderco Edge Grinds Varieties

Plainedge – A smooth, continuous, sharpened edge with no serrations or teeth at any point. Also referred to as a ‘straight’ edge.

Spyderedge

Spyderedge

Spyderedge – An edge which has a two-step serration pattern: one large and two small serrations. This pattern increases the cutting edge’s surface area.

Comboedge

Comboedge

Combinationedge – A blade with an edge that is partially plain and partially serrated.

Trainer – A blunted blade which resembles its sharp counterpart, and is identical to it in terms of weight and proportion. This kind of blade is used for the purposes of training and practicing. Spyderco trainer knives are red-handled for quick and easy identification, and are a great companion for any self-defense class.

Best Grind and Edge for Hunters

deerAt this point you are all aware of the endless variety of knives on the market. Each grind and blade has its own set of pro’s and con’s. Choosing the right blade for you comes down to what you need it for. Many of us need a good hunting knife. After we have tracked and killed game is when the real work begins. Field stripping a buck is a big job. You need a knife that is sharp enough to cut to muscle and sinews and strong enough to cut through bone. If you are only skinning your game I would recommend the hollow grind. The fine blade cuts like butter. The downside of course is that this grind goes blunt fairly quickly. Although I love the hollow grind I tend to lean towards the convex grind. The convex grind offers the most strength so that you can cut through bone. It is extremely sharp as well so cutting through muscle will not be a problem. On top of all that a convex blade will last longer than most other grinds. This is because as you sharpen the convex blade steel from the sides of the blade gets removed as well. This keeps the edge a consistent thickness giving the knife a longer life.

Best Grind and Edge for Defense

Which blade is best for self-defense? There is a major debate surrounding this question. There are those who believe knives should not be used for self-defense. Their argument is that when up against a firearm a knife won’t stand a chance. There is also a high margin of hurting yourself. On the other hand using a knife can be extremely effective if you know what you’re doing. If you choose to use a blade to protect yourself take lessons. You need to practice with your blade. Going into a knife fight without training can be dangerous for everyone involved.

knife defense

Another thing you must consider is your local knife laws. There are certain knives that are illegal to carry. Spydercos’ Autonomy knife is an example of a blade that is illegal to carry. You do not want to get caught with an illegal weapon even if you are using it to defend yourself. Look up your local laws before purchasing any blade. That being said I personally believe the Kerambit is the best blade for self-defense. The unusual curved blade allows for more effective cuts and allows for a nice strong grip. That being said any blade can be a good self-defense weapon. Fixed blades are better that folded. They are more sturdy and require nothing further than taking it out of the holster to be fight ready. Whether you choose the saber or hollow grind it is how you use it that will make the difference.  Spyderco has so many varieties of blades and grinds that you are sure to find the one that works best for you. Other things to consider would be the handle material and the type of steel used in the blade.

Like learning about all the newest gadgets? Our article about the latest and greatest glock 19 accessories will keep you up to speed.

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