Makita DGA519Z Angle Grinder XLOCK unboxing and review

Eccentric grinder: how it works and what is needed for? The principle of operation of the battery grinding machine for wood. Rating of the best models

If the details estimated for processing are not so large, but increased requirements for the quality of their processing are presented, you should pay attention to high.Speed machines.

Very often in everyday life, people have a need to carry out repair work in the apartment, in the country. At the same time, many are faced with the need to align something, grind, remove the old layer of paint and varnishes and t.D. Such processes can be done manually using the good old sandpaper, but then a lot of time will be spent.

To optimize such actions, it is worth purchasing special equipment intended for such purposes, namely a grinder. The domestic markets are full of their all kinds of varieties. They differ in the principle of operation (there are tape, vibrational, orbital), type of power (from the network or battery), power, assembly quality and parts and in other parameters.

This article will present a rating of eccentric grinding machines. Recently, it has been preferred by users. They are universal devices with which it is easy to process any surfaces.

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Eccentric (orbital) grinding machine

To give smoothness and evenness to various surfaces, you can effectively use manual power tools: grinding machines.

eccentric, grinder, works, makita

On the principle of movement of the working area, they are divided into several categories. One of them is orbital.

Device and principle of operation

The very design of such a tool is simple: there is a drive with a sole on which a removable working disk is attached. The handle can be either one or two, and the second can be removable.

A similar tool received its name (orbital grinding machine) for the course of the working circle. In addition to the rotational movement around its axis, it also makes reciprocating movements. This is due to ellipsoid eccentric (for this such products are also called eccentric).

Orbital grinding grinding with 2 handles

On the main handle of the tool is the start button. Some models have a stopper for her: an additional button that fixes the starting mechanism (that is, the user does not have to constantly hold the launch for continuous operation of the device). The main handle is also located a regulator. A switch that can change the number of revolutions.

Modern models are also equipped with a vacuumber. A small removable bag in which dust is sucked. Part of the devices instead of “own” vacuumers are able to connect a vacuum cleaner.

Types of drives

Eccentric machines are divided into two categories:

Pneumatic. Works on compressed air (supplied by the compressor).

Orbital pneumatic grinding machine

Pneumatic machine for most consumers is less convenient than electric. There are several reasons for this:

  • Additional costs for the purchase, repair, maintenance of air compressor;
  • The need to allocate a place under the compressor;
  • If the pneumatic machine is used in another place, you will have to transfer not only it, but also the compressor;
  • Constant noise from the compressor.

Of the obvious advantages, the weight is less than that of electric drive models.

In most cases, a pneumatic machine is selected for workshops, which have another equipment running from the compressor. And there is a compressor itself, which has sufficient power to connect another tool. Most often. These are automatic.

Orbital grinder for repairing a car body

Other users usually choose electrical models.

Working from the network, they are more convenient, they are easier and easier to carry (since only a machine should be transferred, without a compressor), they can be connected to a conventional outlet (in extreme cases. Power from the generator). Therefore, in the assortment of stores, it is precisely the models with electric drives prevail, and the pneumatic machine is found much less often.

Purpose and scope

Before dealing with how to make the choice of a model. You need to understand why and where eccentric machines are used at all.

As you can understand from the name of the device, a grinding machine (not only eccentric, but in general) is used to grind various surfaces. Some models (“angular grinding”, for example) can also be used for cutting materials. This does not apply to orbital vehicles. They are used only to give the smooth surface the smoothness.

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Characteristics and models of grinding machines for wood.

Due to the features of the disk movement, the eccentric model will better cope with the processing of a concave or convex surface than a “straight” machine. But for grinding angles, the orbital tool will not work anymore.

Similar devices are used for processing the following surfaces:

Processing a wooden staircase with an orbital grinding machine

  • For wood work (in furniture workshops, for carpentry, stripping boards);
  • For processing plastic products;
  • For metal work (primarily concerns the body repair of cars).

Due to the fact that eccentric machines can be used for thin grinding. They are often used in automobile and furniture workshops, for finishing. Conventional users who use a tool for “garage” workshops opt for such devices.

For thin surface cleaning, it is necessary to choose minimum speeds. For “rough” grinding. On the contrary, the maximum speed is ideal.

eccentric, grinder, works, makita

The differences on the handle

Another feature by which you can divide eccentric models is the hilt. It can be both classic and under the palm of hand (in this case, the model has the shape of a gun).

Typically, cars with a hand under the palm of the palm have smaller dimensions and weight. They are most conveniently used to process hard.To.Reach places, which is more difficult to get with a regular, larger machine.

Orbital grinder with a classic handle

About the pros and cons of “orbitals”

We will summarize and highlight the main pros and cons of such devices.

The advantages of “orbitals” include:

Device and principle of operation

Before starting to work with an eccentric grinding machine, you should familiarize yourself with how it works, as well as the modes of its work. Ashm is designed for both rough and filigree polishing of various materials. To do this, the rotating abrasive circle makes progressive and reciprocal-circular movements.

A similar tool works according to a simple principle: the drive is attached to the base (sole), a removable working circle is mounted on it. The circle rotates and at the same time fluctuates (this impulse is possible due to the presence of an eccentric in the form of an ellipse). Rotation speed can reach 20,000 speed per minute. With such indicators using abrasive materials, you can process any materials.

Ashm generates increased vibration, so the presence of one or more handles on the tool often has a decisive value. For small models with a “pistol” handle, it can be the best choice. Such a device has classic parameters and fits comfortably in the palm of your hand. It is especially convenient to work with such Ashm on hard.To.Reach elements that are often found in the repair of machines.

Rating of the best models

The best models of an electric tool for grinding various surfaces:

  • “Zubble 452”. A high.Quality device that is inexpensive;
  • Blackdecker KA-199 is ideal for working with cars;
  • Hammer OSM-435 is usually used in a small workshop for commercial purposes;
  • “Interskol Ashm 125/27” is a very compact machine with light weight;
  • Ruobi ROS300A is characterized by high quality manufacturing and fitting parts.

From a professional tool, the best are considered:

  • Metabo FSX-200-compact device with a slight weight;
  • AEGEX 125 ES. The tool is suitable for commercial use;
  • Bosch Gex 150 AC is ideal for small workshops;
  • Dewalt D26320. A powerful tool that can process large volumes;
  • Makita BO 6030 is the most powerful car of all presented Ashm.

Criteria for choosing orbital (eccentric) grinders

Each eccentric orbital grinder is created for work under certain conditions, has specific technological characteristics and can withstand only cyclic loads provided for by the manufacturer. Therefore, in order to choose a suitable grinder for yourself, it is necessary to be guided by the following criteria:

  • Rotation speed and oscillation amplitude. When stripping and rough grinding, rotation speeds from 10,000 about./min. With a large amplitude of oscillations. This increases productivity, but affects the quality of the surface. Thin grinding is performed at speeds of 2000 ÷ 4000 about./min., At the same time, it is desirable to have a smaller amplitude of the eccentric. As a universal one, you can use eccentric grinding grinding with adjustment of the number of revolutions and an amplitude of 2-3 mm.
  • Performance. This parameter entirely depends on the size of the sole and selected processing modes. The larger the area of ​​the abrasive and the speed of rotation, the higher the performance. In eccentric grinding grinders, grinders with a diameter of 125 mm are used, and the diameters of the circles of professional general purposes are usually equal to 150 mm.
  • Working cycle and production load. The ability of grinds to perform work in a long cycle without a break and the full work shifts for many months depends on the components and materials used in its manufacture. This is the main difference between everyday and professional power tools. For this reason, the latter can be many times more expensive than its amateur analogue, which has similar power and engine rotation speed.

Additional criteria include ergonomics, vibration and noise level, as well as the cost and availability of consumables. Information about all this can be gleaned only from user reviews or on the relevant forums.

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Criteria for choosing orbital (eccentric) grinders

Each eccentric orbital grinder is created for work under certain conditions, has specific technological characteristics and can withstand only cyclic loads provided for by the manufacturer. Therefore, in order to choose a suitable grinder for yourself, it is necessary to be guided by the following criteria:

  • Rotation speed and oscillation amplitude. When stripping and rough grinding, rotation speeds from 10,000 about./min. With a large amplitude of oscillations. This increases productivity, but affects the quality of the surface. Thin grinding is performed at speeds of 2000 ÷ 4000 about./min., At the same time, it is desirable to have a smaller amplitude of the eccentric. As a universal one, you can use eccentric grinding grinding with adjustment of the number of revolutions and an amplitude of 2-3 mm.
  • Performance. This parameter entirely depends on the size of the sole and selected processing modes. The larger the area of ​​the abrasive and the speed of rotation, the higher the performance. In eccentric grinding grinders, grinders with a diameter of 125 mm are used, and the diameters of the circles of professional general purposes are usually equal to 150 mm.
  • Working cycle and production load. The ability of grinds to perform work in a long cycle without a break and the full work shifts for many months depends on the components and materials used in its manufacture. This is the main difference between everyday and professional power tools. For this reason, the latter can be many times more expensive than its amateur analogue, which has similar power and engine rotation speed.

Additional criteria include ergonomics, vibration and noise level, as well as the cost and availability of consumables. Information about all this can be gleaned only from user reviews or on the relevant forums.

What is an eccentric type grinding machine?

Eccentric type grinding machines. Novelty in the field of tools. They have a random trajectory of movement around the circle. In 1976, Festool from Germany presented a device in which the rotational and reciprocating movement was achieved simultaneously. After 6 years, the company produced the industrial model of grinding.

The grinding machine of an eccentric type (orbital) performs the surface processing by quality as a device polishing around the circle. But its performance is comparable to the devices with the reciprocating movement. The movement of the circle of the device occurs in random order, the trajectories are not repeated. Such a constructive solution eliminates the constant grinding of the same places and the appearance of scratches on them.

Прямая шлифовальная машина Makita GD0800C

The English name of this type of device “Random Orbit Sander” is an orbital grinding machine moving along an arbitrary trajectory.

The main parameters of eccentric grinding

When choosing an eccentric grinder (Ashm), you will have to immediately decide how often it will be used. If from time to time and for short.Term work, then when buying you can take a budget option. But if the loads on this tool are frequent and quite large, then you can safely take a professional eshm. Of course, if the tool is acquired for yourself and so that it serves for a long time, then you can look after a professional eshm without hesitation. True, for professional eccentric grinding machine, the price will be significantly higher than for the usual.

Having determined whether it will be ordinary or professional grinding, it remains to still deal with the characteristics of Eshm itself. Without this, it will not be possible to determine what the best grinder from the whole possible assortment you need. All characteristics can be conditionally divided into two categories. The first category is the working characteristics that determine the quality and efficiency of working with a particular eccentric grinder. These include power, oscillation amplitude, rotation speed, diameter of the abrasive circle, weight and option of the tool. The second category is the additional functions of the machine that ensure the convenience and comfort of working with the tool. Additional functions include speed adjustment, option of a vacuumboard, the ability to connect to a vacuum cleaner, a second handle, a start.Up restriction, a pressing force indicator.

Eshm power

The main characteristic of any power tool is its power. And eccentric grinder is no exception. It is she who should first be taken into account when choosing a grinder. High power of Ashm allows you to use the tool longer and with greater efficiency. In addition, the quality of the work performed, the speed of rotation of the grinding plate, as well as the weight of the machine depends on this parameter.

The power range of eccentric grinders from 160 watts to 900 watts. But low.Power and high.Power Ashm can be listed on the fingers. The most common grinder with a power of 300 watts to 600 watts are. Eshm with a capacity of 300. 600 watts is especially popular with an eccentric grinding machine Bosch. When choosing, you should pay attention to Ashm with high power rates. Over, if the difference in power is 20. 50 watts, then there will be no special differences as a processing. But if the difference is 100 watts or more, then preference should be given to a more powerful tool. Quality of work, their duration and life of ASM will be high.

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Type Eshm

Various sources of energy are used to work ASM, depending on this there are several types of eccentric grinders. It can be an electric machine with power from the mains or battery, or there may be a grinder that uses compressed air. Such a variety allows you to use Ashm and where there is electricity, and where it is not. Choosing one or another option, it is necessary to clearly understand why and where Ashm will be used.

If with electric grinder is more and less clear, then the pneumatic should be told a little. The grinding eccentric pneumatic machine is used mainly on a production scale, as it requires the installation of additional equipment in the form of a compressor or cylinders with compressed air. These Ashm serve perfectly in the garage, one hundred or in the furniture production workshop. Their main advantages are small weight, it is only from 600 g to 1000 g. As well as a small number of mobile details. Since, using compressed air, the need for an electric motor has disappeared, accordingly there were fewer details. This affected both weight and service life. To all this, small weight allows you to use the tool itself for a long time and comfort. One of the manufacturers of such ASHM is Dynabrade, with its eccentric grinders Dynorbital.

Eshm rotation speed

This parameter of an eccentric grindow is directly related to its power. The quality of the work performed and the convenience of work depend on the speed of rotation. But there is one important point. When buying, they usually try to choose a machine with high speed indicators, believing that the higher the better for work. That’s just this applies to a greater extent to performance than to the quality of work. Ashm very high speeds are suitable for black surface processing, but for perfect grinding, low speeds are required.

Another feature that should be taken into account with the speed of rotation. It lies in the fact that the rotation speed will be the lower, the higher the power of the machine. So, for example, an eccentric grinding machine BO6040 Makita has a capacity of 750 W, and its rotation speed is only 1600. 5800 rpm. At the same time, the eccentric grinding machine Bosch Gex 125-1 AE has a power of 250 W and the rotation speed of 7500-12000 rpm. When choosing Ashm, it is necessary to remember this feature and focus on what purpose the machine will be used. It will be a grinding grinder for black grinding or a low.Speed machine for finish grinding.

Buy eccentric grinder Makita

Eccentric grinders are very similar to vibrational grinders. Despite the fact that eccentric grinders are a separate type of grinder, certain functional characteristics are borrowed from vibrational grinding machines. The principle of work of eccentric grinding grinds is to combine the progressive and rotational movements around its axis, the result of which is good performance and a perfectly smooth surface. Rotational movements provide high.Quality removal of the material of the working surface, and thanks to vibration, the surface gains unique smoothness.

Makita grinder, like any other power tool, has its own characteristics and characteristics that you need to pay attention to when choosing a specific model.

  • Power (from 240 to 750 W). Low.Powered grinders are great for point clean grinding. Powerful, on the contrary, for more rough surface treatment.
  • Revolutions (from 1600 to 12000 min-1). At high speeds, surface treatment occurs much faster, but at the same time and rude. The high speed of work is perfect for processing large surfaces, where high performance of chips is necessary.
  • Circle diameter (from 123 to 150 mm). One of the most important parameters affecting performance. The final result of your work depends on the diameter of the grinding circle. If you need to make clean grinding, it is better to use a small circle diameter. For more rough grinding with greater performance, it is recommended to use a larger circle diameter.
  • Type of power (Li-Ion Battery / from the network).

Another important feature of the eccentric grinding grids Makita is that they are equipped with the function of dust removal. Thanks to special holes on the sole of the grinder, dust falls into the bag to collect dust. Powerful grinders can also have an additional handle on the case for ease of work, as well as special vibration.Layers on handles to reduce vibration.

Makita grinding machines in Ukraine. Maklta.Com.Ua

Based on the final result of the work that you want to get using the Makita eccentric machine, you can choose the model of this power tool you need. You can buy an eccentric grinder makita on our website Maklta.Com.Ua. We also provide an opportunity to purchase a power tool on credit.

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