Many home craftsmen have an electric machine, which is popularly called "emery". It requires emery stones (circles). On this machine, you can sharpen individual parts or grind any product, tools. Such equipment is convenient to have at hand if repairs are to be made. An emery stone for sharpening knives will be irreplaceable.
The stores offer a wide range of grinding wheels. Sometimes they are replaced with diamond counterparts. It is good to use an abrasive wheel for metal . This article details the classes and types of these elements.
What classification of stones exists for the machine?
One of the most common are white emery stones for a grinder. The marking of such a circle is 25A. With these stones you can work on the processing of products from non-solid metal. They are great for homework. For example, it’s convenient to sharpen knives and scissors in a white circle. They are suitable even for sharpening axes. You can select the desired size of the circle and get to work.
There are stones of blue or orange color with the same marking: 25A. They are distinguished by high quality sharpening. This is evidenced by numerous reviews.
Electrocorundum circles are most suitable for homework, in which it is important not to overheat the metal. The size of the stone must be selected based on the model of the machine. The most common are circles 32 mm. They are used for home devices.
There are diameters of stones 125, 150 and 175 millimeters. The largest can be 200 millimeters. Thickness is possible from 10 to 25 millimeters.
Circles come in silicon carbide. They are labeled 64C. Available in green. This model is designed for the processing of hard alloys. Work with tool steel is possible. For example, you can grind them to solder for the element of the punch.
In the process of turning, a high temperature can be noted. The material of the stone is durable. It does not wear out or wear out for a long time. You need to understand that you cannot sharpen knives in this circle, so there is a high probability of spoiling a kitchen appliance.
The desired stone can be used on steel, the marking of which is P6M, P18. Work with VK8, T5K10 alloys is allowed. For harder alloys you need to use a diamond wheel. On the shelves of construction stores, you can see grinding wheels of large sizes. The large diameter of the stone is designed for serious machine tools.
How does labeling work?
Many acquire emery stones, but not everyone knows how marking occurs. Grain is usually marked.
Grain of an emery stone can be from 8 to 25, at most - 40H. The eighth is considered the smallest, and the largest is the fortieth.
In addition to numbers, the marking of emery stones should contain a literal value. SM is placed on circles of medium hardness, and CT on a stone of medium hardness. The cost of a CT circle is usually higher than SM. The advantage of stones of medium hardness is their resistance to abrasion. Some make emery stones with their own hands, but they will not be durable.
Which label is best to choose?
If a person has a goal to make precise sharpening, it is better to choose a circle of fine grain: from 12 to 16. For example, to sharpen figured skates, you need an emery stone of 12 grit. It is better to take the marking SM. The diameter of the circle in this case will be 150 millimeters. It will be relatively small in thickness, only 8 millimeters. Landing is usually taken 32 millimeters. Since the grain in the circle is small, a perfectly even sharpening of the skates is obtained. The sizes of emery stones need to be selected depending on the forthcoming work.
Which stone to choose for a 150 mm machine?
If you need to pick up an element on a machine with a diameter of 150 millimeters, then you should pay attention to the standard circles SM. They will be 150 by 20 by 32. Landing of an emery stone will be 32 millimeters. Its width will be 20 millimeters. It is better to take an average grain size of the circle - 25. They are great for grinding small tools and parts (for example, knives). Easy to sharpen and scissors. With these circles you can sharpen such large tools as an ax. The medium softness of the SM circles allows them to be used for household needs. Even a beginner can take advantage of such a stone. The cost of the circle starts from 120 rubles.
Which manufacturer is better to choose?
A wide range of grinding wheel manufacturers is on the market. Well-established products that are produced in the city of Volzhsk. These emery stones are of high quality, judging by the reviews. They do not break and serve a long period of time. Another advantage of these circles is the affordable price for the average consumer. It is convenient that the company delivers its products throughout Russia.
What kind of stones are there for sharpening knives?
Each person was faced with the need to sharpen knives at home. This process usually takes a long time if there is no machine or grindstone at hand.
Grinding wheels are natural as well as artificial. The following can be attributed to natural:
- Vashita.
- Arkansas
Artificial grinding stones include aluminum, ceramic, and diamond grinding wheels. People are divided into supporters of natural stones and artificial lovers. Nowadays, artificial emery elements are becoming very popular. They are more affordable and universal for most jobs.
An emery stone for sharpening knives is a useful item in every home.
The difference between water stones and oil
Few people know that emery stones are divided into water and oil. Water before starting work must be soaked in water for about fifteen minutes. Oily differ in that they do not need water. It is necessary to apply a drop of special oil on them. The stones need additional lubrication so that the cracks between the grains do not clog. Otherwise, the gaps will be filled with steel filings, which will lead to a malfunction of the machine.
Recommendations and reviews
Based on the feedback from people using different stones, many people like the Naniwa Combo 1000 for 3000. The series is advised to choose Economical. This stone is inexpensive and perfectly performs the task assigned to it.
Some people like to use the Lansky sharpener. With it, it’s easy to even restore the angle of the knife tip. With the desired device, it became possible to even change the angle.
Lansky marked 17, 20 and 30. Five different sharpening stones are sold with the device in a set. They differ in different granularity. You can polish various edges without fear of chips and damage.
People who often work with grinding wheels recommend using the Lansky Crock Stick for home sharpening. It is a plastic stand with two different stones. They are different in grain size. Each stone is inserted into the hole in the stand. The work surface is on top. The cost of this device is much higher than the price of its analogues.
Some people think that it is better to take stones of medium hardness, which are suitable for most homework. Such circles will be inexpensive, which will save money on the purchase of an expensive grinding machine.
Conclusion
So, now it’s clear what emery is. As you can see, it is divided into several types and categories. Everyone chooses what is best suited for one or another purpose.