What Are The Differences Between The Various Blade Grinds Used On Folding Everyday Carry Knives?

Folding knives are one of the fastest growing Knife Categories. According a Knifematch.com, there were over 1,000 new folding knife designs released in 2016, an unprecedented number!

As more and more people learn how to make a successful folding knife purchase, they will be moving fast! That is why Knifematch is such a great site- it has plenty of new designs every day!

There are several different blade grinds used for folding knives. These varying degrees of steel content can create different properties and effects in the knife. This article will not go into much detail about this, as that would take up a lot of space.

This article will focus on what differences between the different blade grinds and what effects they have on the knife user. There are many articles about these effects, so we will not go into too much depth here either.

Hollow grind

The term hollow grind is used to define the different techniques used to create the blade geometry on knives. These include round, stepped, serrated, and straight.

A knife with a round grind is created by first forming a circle with a knife steel. This circle must then be compressed into a smooth, flat surface before the next step can take place.

The compaction process requires more work from the blade-get-to-blade moment forward. Having to repeatedly shape and compress the steel multiple times is not only time consuming, but also may result in some poorly worked blades out there.

There are several different shapes of Grinds. Some have named ones while others do not. So, we will just will call them by their words: Flat, Hollow, and Reactive.

Chisel grind

The term chisel grind is often used in reference to the varying lengths of the blade’s spine. Chiseled knives have the longest and sharpest tip, rounded bottom, and flatter middle sections. This style of grind is referred to as a chisel style knife.

The other two types of blade shape referred to as square or round edge. These styles are known as rectangular edge and concave/ convex edge. Typically, rectangular edge knives have a more squared off tip and rounder base than the rectangular edge knife with a concave/convex tip.

Most everyday carry knives today are chisel style with a flat or reverse angle at the back of the blade.

Convex grind

The convex grind has the least bit of taper from tip to base. This style of grind has the blade be wider at the base and narrower at the tip.

The result is a harder, thicker, and longer blade that can either put a serious hurting to your target or your target’s target. Longer blades put more pressure on the guard against the user’s finger, making a chance of accidental release higher.

Narrower grins reduce variability in size and caliber of blade users can carry. A smaller blade may be more sustainable vs a wider one, as it must be stronger to hold its thickness throughout use.

Shape

there are three basic shapes of folding knife blades: simple, spear, and star. Each has its own purpose and features that make one different from the next.

A simple blade has one short, thick blade surrounded by a shorter, thinner blade. The long blade is the trap-door for using the knife. It is the place to store your knife when you open the box and throw it away!

A spear blade has a longer, thinner but longer, thickest blade than a simple blade. The difference is in how it is shaped. A spear blade has a rounded tip that extends beyond the short, thicker blades.

A star shape has a long, thin but long, thick Blade.

Process

A blade steel is an important part of determining the shape of your knife. There are two main blade steels used in knife making: carbon and alloy. Carbon blade steels have a natural, variable depth of Metallic looking patina that varies with the heat source such a a flame or hammer.

Alloy blade steels have some form of metal used to make it shine. These may be alloyed with others in the knife manufacturing process, or may not have another material added as an intended purpose. For example, glass or ceramic can be used as a intended purpose for window breaker blades!

There are three common blade steels: mild, fine, and chromium oxide (chromium phosphate). Each has its own unique characteristics that determine the shape of the knife.

There are three main blade grinds used in the manufacture of everyday carry knives. These are Swedish, Japanese, and German. Each has its own specific grind that creates a different style and shape of knife.

Swedish blades are thin and fast. The bolster is the thick part that holds the blade together. The thinner side is called the tip and is where you hold the knife or where your non–knife user sees the blade.

Japanese blades have a thicker tip too, making them look like a proper sword–like knife. These can be hollow–blkered or solid–blued. Both have thicker middles called guards to hold onto.

German blades have a rounded tip like a butter knife, making them slightly more spreadable than other knives.

Length

Most folding knives have a length of about 8 to 10 inches. This length includes the blade, handle, and stability due to the knife’s length.

The longer the knife, the thicker the blade can be. The thinner the blade, the shorter theblade. Both can be thin and short!

Some riders use shorter knives due to their comfort level with smaller blades. Others prefer a heavier, sturdier knife for Kershaw-style carry. Still others like a lighter knife that can be held on a single hand only because of its thickness.

There are a variety of pbars used for blade distribution and geometry. These include k-bar, U-bar, O-bar, and Z-bar blade grinds. Each has its own advantages and disadvantages that can change between knives.

The K-Bar Blade Grind has the widest spacing between the blades and is most commonly used in Lifestyles (1-3 inch) or Military (3 to 4 inch) Applications. The U-Bar Blade Grind has the tightest spacing between the blades and is more typically used in Technical (5 to 6 inch) Applications.

The O-Bar Blade Grind has the middle size of all threeencies between wide and tight blade spacing. The Z-Bar Blade Grind has the smallest amount of size difference between the blades.


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