Grinding machine: how to choose the right equipment for the home? – Setafi

If we consider a grinding machine, how to choose it, and which models are better to pay attention to, it is necessary to study the technical parameters. First of all, this is the engine power and the dimensions of the circle. The main recommendations for the right purchase are described in the article.

Main technical characteristics

To understand how to choose a sharpener, you need to study the main technical characteristics. These include: power, maximum number of revolutions and circle parameters.

Power

This is the main indicator that shows how productive the device can be. If you figure out how to choose a grinding machine for professional use, it is better to pay attention to models with a power of at least 300 watts. They withstand heavy loads without overheating the engine.

If you need to sharpen only small tools, for example, knives, carvings on wooden blanks, chisels, thin drills, you definitely don’t need too much power.

Therefore, the main way to choose an electric sharpener for your home is to study the power. It should be in the range of 150-250 W, this is quite enough. But it also happens that you have to sharpen scythes, axes, shovels. Then the device should be more productive - from 300 watts.

Max RPM

Another method on how to choose an electric grinder is related to the maximum number of revolutions. Usually 2700-3000 rpm is enough. If the speed is lower, performance is reduced and the engine runs partially idle.

If the indicator is higher, then the material of the blades and other products that need to be sharpened will heat up too much. But at the same time, a high speed is suitable for sharpening parts made of hard alloys. To do this, use finely abrasive (diamond) discs.

Their grains are very small, so at a normal number of revolutions, productivity will noticeably decrease. Therefore, carbide materials (for example, soldering on a circular saw, a drill head for a perforator) are sharpened at limiting frequencies up to 15,000 rpm. They do this with diamond discs.

Landing circle diameter

If you consider which sharpener to choose for your home, you can take a tool with a small bore diameter. This power is quite enough for sharpening household tools.

But you need to keep in mind that it will not be possible to put abrasive, heavy circles on such a shaft. Even a slight deviation will cause the shaft to bend and the disc to beat. Because of this, the quality of sharpening will decrease.

If you buy a sharpener for professional purposes, then you need to take tools with large landing diameters. Such circles are suitable even for low-power devices. Due to the large dimensions, there will be no beats, and the sharpening will be very good.

Circle diameter

This indicator is directly related to the size of the sharpened objects. For example, for knives, a circle with a minimum diameter is suitable, and for axes, the braid parameter should be significantly larger.

It should also be borne in mind that large circles with abrasive are characterized by high inertia. Therefore, they provide smooth grinding and uniform load on the engine mechanism, so that the mechanism will last longer.

Another point - the larger the diameter of the circle, the greater the power of the machine and the higher its price. Therefore, if you figure out how to choose a grinder for the home, it is better to buy devices with small diameter circles.

Circle thickness

The thickness also depends on the size of the processed blade. For example, if you sharpen knives and chisels, then a small thickness is enough. If you sharpen a shovel, a scythe, the width should be greater.

But it should be borne in mind that thick circles wear down faster and lose their shape, which is why there is an imbalance. Therefore, over time, such devices have to be changed. Moreover, thicker circles increase the mass, so a more powerful engine is required.

Extra options

To understand how to choose an electric sharpener, along with the main criteria, you need to analyze additional parameters. They are no less important because they facilitate work and extend the life of the mechanism:

1. A protective cover, a screen with protection are necessary elements that ensure safe work during sharpening. The fact is that circles are made of fragile materials, and if damaged, they can shatter into fragments.
2. The backlight is a lamp on a flexible leg. Also, an individual light source can be connected to each disk.
3. The working platform is a surface that can be positioned at different angles of inclination. Used for sharpening chisels, chisels, drills.
4. The option of fastening to a surface with a support is especially important when sharpening overall tools. Suitable for working with small cutting objects.

How to choose a sharpening machine: practical tips

If you decide correctly on how to choose emery, a sharpening device, you need to take into account the scope - how often and what tools will be sharpened. The main buying tips are described below:

1. If you do not have to work with the device so often, literally 2-3 times a year, it is better to purchase an inexpensive model within 2000-4000 rubles. They only work for a few minutes, but more is not required. In addition, these tools are the most expensive.
2. If you need to buy a universal sharpening device, it is better to stop at models with a gearbox and a container for the possibility of “wet” sharpening.
3. It also happens that a device is required for high-quality sharpening, which is carried out regularly. For professional purposes, they buy compact, powerful devices. They are more expensive - about 3000-6000 rubles.
4. You can also purchase a powerful machine with an engraving machine. In this case, you need to choose among the "2 in 1" kits. They also cost about 3000-6000 rubles.

When choosing an electric grinder, it is better to review the main models on your own. It is preferable to choose well-known brand products with sufficient power. Then they will not waste extra energy and will last long enough.