The difference between straight knives and toothed knives

According to whether the blade has a toothed edge and is divided into the flat edge, half tooth edge, and full tooth edge, the straight knife is what we call a straight knife. In order to understand the difference between straight and toothed knives, we need to introduce the difference between them by the way of knife transportation and the advantages and disadvantages of straight and toothed knives.

Here is the list of contents

1. The way to transport the knife

2. Advantages and disadvantages of toothed knives

3. Comparison between straight and toothed knives

The way to transport the knife

First of all, let's understand the way to carry a knife. Knives can cut, cut, cut, chop, chop, stab, poke, tease, scrape, saw, etc. For the convenience of understanding, the knife method can be divided into two categories, namely, push cut and pull cut.

Push cut

Cutting action is to push the blade forward to complete. For example, when shaving, you push the razor blade forward; when peeling a fruit, you also push the blade in the direction of the desired peel; when chopping wood, you also push the blade into it.

Pulling and cutting

The cutting action is accomplished by pulling the blade backward. For example, cutting meat or cutting tomatoes.

Advantages and disadvantages of a toothed knife

Advantages of a toothed blade

Increased cutting power: The piercing points on the blade provide many piercing and force points while cutting the object.

Increases cutting the length by 10 %: At the same blade length, a knife with a toothed blade design will have a 10% longer cutting surface than a knife with a full blade of the same length if the full edge is straightened.

Increasing blade sustain: When cutting, the piercing point first "bites" into the object to be cut, allowing the curved edge to cut with minimal force and resistance. The role of the abrasive edge is played by the piercing point, thus extending the durability of the blade.

Disadvantages of toothed edges

Uneven cutting: When using a toothed blade to cut wood, leather, etc., the cutting surface is significantly less flat than that caused by a straight blade, and almost most toothed blades are unable to perform the job of cutting wood.

Lack of precision: Because the tooth blade is formed by a bunch of piercing points and curved edges, it is like driving over a bouncing road when cutting, and it is more difficult to control the precise cutting action, so the tooth blade is never used in knives that require precise cutting.

Comparison between straight and toothed knives

Generally speaking, straight knives work better than toothed knives in pushing and cutting action; while toothed knives work better than straight knives in pulling and cutting, especially against hard and strong objects such as plastic hoses, climbing ropes, etc. straight knives can also play a practical role in pulling and cutting, but the prerequisite is that they must be very sharp. For example, when cutting tomatoes, the use of a toothed blade knife can be very easy to "saw" open tomatoes without making the tomatoes deformed due to pressure. But when using a straight knife, in addition to the blade to be sharp, but also first push and then pull. Experienced people know that the blade should be pushed forward a bit, first fully apply the characteristics of a straight knife suitable for pushing and cutting, and then pull back, then the resulting cut will be beautiful.

However, compared with the flat blade and the tooth blade, the application and practicality of the flat blade are better, because the straight blade can do what the tooth blade can do, while the tooth blade can not do what the straight blade can do.

Another compromise is the semi-toothed blade, which has a 50/50 or 60/40 ratio of flat and toothed blades, with a flat blade at the front and a toothed blade at the back. This combination seems to be a good design and is flooding the market. However, just as a utility vehicle cannot replace a professional truck or jeep, it is a bit of a dilemma in really tough conditions. Generally speaking, to really make the blade can play its function of the length of at least 1.5 - 2", and shorter than 1" of the blade is completely useless. In the case of a 3.25" long knife, the blade is about 1.25" long, which is too short in some cases, and the flat blade is only 2" long, making you feel tied up when cutting wood or peeling apples.