Knife sharpener: types and description

Modern industry significantly improves the quality of life by releasing new devices for the household. One such tool is a knife sharpening machine. It allows you to easily sharpen any piercing-cutting objects.

Grinders in household and industry

Every day mankind uses cutting tools: scissors, knives, screwdrivers, axes, etc. From frequent use of any of these items is blunted. The sharp edge of the metal blade quickly "sits down", which makes the tool unusable. And this is due not only to the mechanical impact that occurs during contact with other solid objects. The blade is dull, even if it is not used. Steel of any quality is corroded over time, which directly affects the sharpness of the thin edge. Therefore, such products must be constantly undermined.

Periodical sharpening of sharp metal tools is also necessary in production. The quality of any industrial operations depends on the preparedness of the equipment for work. At the manufacturing enterprises, the sharpening of tools is much more frequent, since in such conditions the load on the knives is higher.

The grinding machine is a necessary device for solving industrial and household tasks. A modern knife sharpening machine allows you to recover the sharpness of metal objects in seconds, preserving the geometry of the blade as much as possible.

Optimum blade inclination

To effectively use the knife it is important to sharpen the blade at a certain angle. In the process of sharpening, the angle between the edges of the blade should be restored.

For each type of knife, there are recommended angles:

1. Knife for bread, vegetables and fruits - 15-20 degrees.
2. Universal knife for different products - from 20 to 25 degrees.
3. Touring knife - 25-30 degrees.
4. The knife for cutting hard materials is 30-40 degrees.

You can manually knife at the recommended angle manually using abrasive bars, grindstone. But to achieve the necessary angle of the blade in this case is quite difficult. To facilitate and accelerate this process, special devices have been developed - knife sharpening machines. They are easy to use and have a simple design.

What are the knife sharpening machines?

This is an oversized electric appliance with fast-rotating abrasive disks. Compared with other devices for sharpening, the machines allow you to accurately set the angle of sharpening and to process the blade in a few seconds.

Such units are used in mass food establishments (restaurants and cafes), where there is a need for frequent sharpening of kitchen cutting tools. Clippers for knife sharpening at home are inexpedient to use because of the high cost of these devices.

Modern electric sharpeners qualitatively process blades with different types of edges. They can sharpen both from one side, and from two at the same time. With the help of the machine it is possible to perform all stages of blade processing, starting from the formation of the optimal cutoff kut and ending with polishing.

Typically, such devices have a function selection function. It allows you to set a gentle mode if you need to sharpen a thin blade from an expensive material, or ask more complicated processing for hunting, tourist and pocket knives. In this case, you do not need to disassemble the machine. On the case of the device there is a control panel with which you can select the necessary grinding parameters.

The electric knife sharpening machine can be used both in the restaurant industry and for household purposes. In the first case, the application is fully justified. The high cost of adaptation pays off quickly.

Advantages of electric pencils

Electric knife sharpener is very popular. It allows you to qualitatively sharpen the blade of any length and thickness, accurately retaining the desired angle. Modern electric machines automatically determine the inclination of the blade. The machine perfectly sharpens knives with wavy blades.

Another advantage of this device is its versatility. Such a machine can be used for sharpening scissors, screwdrivers and other sharp tools. After grinding, the blade looks like new.

Typically, electric machines consist of several abrasive disks located perpendicular to the blade, and guide elements. Sharpening the knife on such a device is carried out in one motion. More complex models have several sets of disks with different granularity.

An important advantage of grinders is their long service life. Basically, such instruments are supplied with grinding elements with a ceramic or diamond coating. Even with everyday use, the need to replace such knives arises extremely rarely. Home knife sharpening machines can never be repaired.

Universal grinding tools

For sharpening European and Japanese products, there is a universal machine for sharpening knives and scissors with three stages of the process. On the first, the knives are treated with an angle of sharpening up to 15 degrees, on the second - 15-20 degrees. The third one uses composite discs, which create a microscopic angle. This processing allows you to create a thin cutting edge.

This type of machine is suitable for sharpening kitchen, travel and pocket knives.

Grinder

It is a professional tool with felt and abrasive wheels. Such a machine is used in manufacturing plants and in places of mass sharpening of knives. Processing is carried out by professional workers who possess the necessary knowledge. A person without experience will not only not be able to sharpen the blade qualitatively, but will also spoil it.

A professional knife sharpening machine provides a high sharpness of the blade, which lasts a long time.

A machine for sharpening knives with your own hands

If the automatic grinders are too expensive, and sharpen the knives by hand too long and ineffective, you can make a tool yourself. There are several versions of self-made designs, the manufacture of which requires very little time and effort.

To create the tool you need:

• Abrasive bars or stones;
• Stop for knife.

As discs that are used in machines and electric machines, you can use ready-made stones or make them yourself. For this, it is necessary to take small glass plates with a thickness of 5 mm and use a double-sided adhesive tape to paste on their surface sandpaper of different granularity. When using such a device, it is not recommended to make quick movements so as not to overheat the blade.

Sharpener from wooden bars

To make this tool you will need two abrasive and wooden bars of the same size. Procedure:

1. Measure the desired angle of sharpening and apply the appropriate marking on wooden blocks.
2. Attach the grindstone to the planned lines and note its width on both sides.
3. On the markings, make cuts with a depth of 15 mm.
4. Insert in the indentations abrasive bars.
5. Secure the structure with bolts.