Knife sharpening knife: types and quality

If you need to quickly sharpen something, then an ordinary bar for sharpening a knife will do. To correct the blade on the sandpaper would be faster, better and more convenient, but this work requires not only a certain skill, but also knowledge.

The point is that sharpening with high speed raises the temperature of the material being ground, and this is fraught with the uncontrollability of the process of spontaneous tempering of the tempered blades of the blade. The result is predictable. The knife can be thrown out after such sharpening.

It turns out that the quality indicators of a hand-sharpened tool can surpass the performance of the tool, brought to the appropriate level by factory automation tools.

Any bar for sharpening a knife must consist of two fractions:

• Abrasive grains of a harder material than the one from which the object being processed is made;
• Matrix of a plastic substance, which is capable of holding the first element in the form of the shape of the same bar.

Usually, the hardness of the template is comparable to the same index of the material being grinded, sometimes it is less.

It is necessary to correctly choose the characteristics of the matrix, this will allow it to abrade during operation and expose new grains of abrasive. The old ones, dulled, are dying. Simply put, when the processed material is erased, the bar for sharpening the knife is also erased. This is his normal job. If the pattern is too soft, the bar will sharpen badly. In this case, the abrasive grains will be pulled out by the processed material from the soft matrix. Self-testing, the bar will quickly lose the necessary shape of the contacting surface with the material being processed. Processing will be inaccurate.

The main characteristic of an abrasive is the uniformity of the dimensions of its particles. If the grain size is different, then the grinding will not be very accurate, but the result is random. Of course, the bar for knife sharpening should be qualitative, but we will make a reservation at once: the quality of work directly depends on the master's skill, and only then on the quality of the material.

A diamond is considered to be the king of abrasive materials . In its crystal lattice, the grains have a sharp shape. In the process of work, they do not change it. In simple terms, do not go dumb.

A diamond bar for sharpening knives will never lose its flat shape. This deposition has a thickness, measured in millimeters, so all the talk about the surface of such devices is unfounded. Before working with such a bar, it must be moistened with water, then it will rub the metal surfaces faster, and heat will be less.

But the most "running" were and still are ceramic bars for sharpening knives. Undisputed advantage of such tools is their durability and a huge resource. The matrix of such bars wears out slowly. But there is a downside to the coin. At work, ceramic bars are quickly clogged with tiny bits of worn steel, and this entails a loss of abrasive properties. Return the working properties of such a grindstone will help the usual kitchen cleaner for cleaning utensils.

And in the end a little advice to beginners. Do not immediately buy expensive appliances. Even the best abrasive will be just a bar if you do not have the skills to work with it.