Grinding eccentric machine: description, characteristics, types and reviews

The segment of the grinding technique is rather widely represented by mechanical devices that allow processing materials of various kinds. One of the most effective options is an eccentric (orbital) device. Thanks to the design features, such models are not only able to work with a huge number of different surfaces, but at the same time provide a high-quality result. Suffice it to say that a grinding eccentric machine is capable of performing polishing operations. In some models, a special mode is envisaged for this, but the performance of most models gives the effect close to the polishing already in the standard operating format.

The device and the principle of operation of equipment

Orbital machines are supplied with a rounded platform, which is a support plate. This part fixes the grinding elements, which need to be replaced periodically. As a material for working plates, corundum, fleece, felt, sponge, fur and other raw materials are used. Direct attachment of the sanding sheet is carried out in two ways - velcro or by clamping. The first option is easy to replace, and the second - the economy. Since the grinding eccentric machine leaves a lot of dust during operation, some manufacturers also provide for a dust separator in the design, to which a vacuum cleaner can be connected through a channel in the sole of the tool. The very outsole itself is capable of performing two actions simultaneously. The main rotational motion ensures fine grinding without defects, and an additional reciprocating function fixes the quality of the result.

Main characteristics

Eccentric models are presented on the market with power indicators in the range from 150 to 1000 W. When choosing an aggregate for conducting standard simple operations, it is worthwhile to focus on devices with a power potential of up to 400 W. Power up to 1000 W and more are available models that can be used for the purpose of rough stripping of solid materials. Less often there are grinders with a power potential of more than 2000 W, but such a tool is in demand in operations of "wet" processing. In addition to power, the size of the disc should also be taken into account. The standard diameter is considered to be 125 mm - this is the option with the optimum vibration amplitude for the final processing. But for more serious work in large volumes, a grinding eccentric machine may be required, capable of interacting with large diameter circles - up to 215 mm.

The speed of the machine is influenced by the performance of the device in addition to power. The entry-level models have the number of revolutions per minute ranging from 4000 to 10 000. In the older lines, you can find grinders with a working frequency of 20,000 rpm. Experts recommend giving preference to the instrument with the possibility of adjusting this indicator, which will make the processing more accurate and effective.

Versatility of eccentric machines

Among the operational features that distinguish grinding machines of orbital type, it is worth noting a wide range of applications, that is, universality. The fact is that the quality of processing such models are comparable with the vibrating apparatus, and in terms of power - with tape technology. But that's not all. As already noted, eccentric devices are also capable of performing a polishing function, although adequate equipment may be required in order to fully use the unit. In no small measure, the high versatility of a grinding eccentric machine is achieved thanks to the discs used. The working element can perform not only rotational and translational motion, but also circular, and also provide an oscillatory effect.

Varieties of apparatuses

Using a design with the presence of eccentrics complicates the device, but in the mass of its model are similar to each other. The only basic separation can be done between household appliances and professional equipment. The version for the household has a compact size and a modest mass, which gives it excellent ergonomics. In general, this category is represented by eccentric grinding machines for wood, which have small power indicators and are designed for short treatment sessions. Professional models, by contrast, have high productivity and can be used in the processing of stone and metal. At the same time, these are massive aggregates, the details of which are distinguished by a long working life and good endurance.

Model Reviews Makita

The manufacturer regularly updates the range of grinding equipment, which also features eccentric models worthy of attention. Users note the high power capacity of such equipment and ease of operation. Of course, much depends on the specific modification, but, for example, the Makita eccentric grinder with a power of 300 W is able to perform high-quality processing of rough building materials. Mark in Japanese products and an effective dust extraction system, which in most cases is realized through the support panel. By the way, the connection with the vacuum cleaner is realized without a special adapter, which also increases ergonomic advantages of the devices. In other respects Makita grinders confirm the high status of the brand in the construction equipment market - both the quality of assembly and the convenience of handles with the possibility of adjusting the operating parameters cause only positive impressions.

Reviews of Bosch models

The German brand has long won the image of not only a reliable manufacturer of home appliances, but also a construction power tool. Although users of this brand products often criticize the developers for the very weak characteristics of the budget series, the Bosch eccentric grinder even in the initial class is distinguished for its worthy performance. A special success in the market is enjoyed by a series of inexpensive GEX models.

In the average performance, a representative of this line is equipped with a power of 250 W and provides a frequency of 12,000 rpm. In addition to good performance, the owners of the device note small but pleasant ergonomic features - for example, a cable for 4 m, a dust collector with a corrugated filter, high-quality fiber wheels and general convenience in operation. Therefore, if you need a comfortable model for home use, the Bosch GTS orbital eccentric grinder can be the best choice.

Hitachi models reviews

A worthy model is offered by Hitachi. In the family of this manufacturer you can find both domestic and professional models. The most popular devices are from 200 to 300 watts. According to the owners of such equipment, the models do not have a special functionality and performance indicators, but they perform their direct tasks qualitatively. Like the eccentric grinding machine "Makita", the units from "Hitachi" provide a good result on a wide variety of surfaces. Also, the brand's fans testify that this product is one of the most economical. Traditionally, power tools are considered very demanding in terms of energy consumption, but low-power grinders Hitachi can be placed in a number of exceptions.

Cost of the instrument

Price list of orbital grinders depends on the level of operational parameters. Budget devices for domestic use can cost 2-3 thousand rubles. With the help of such equipment it is difficult to obtain high-quality processing, but this is better than performing similar operations with improvised means. The class above is followed by eccentric grinders, the price of which varies from 4 to 7 thousand rubles. In this range, by the way, most of the models of the manufacturers described above are presented. Such an electric tool is characterized by decent performance, well thought-out ergonomics and a wide range of functions. For 10-15 thousand rubles. You can also purchase a professional model that will quickly cope with heavy materials in processing, regardless of the state of their surface.

Conclusion

A building multifunctional tool is rarely distinguished by high quality, reliability and accuracy of its tasks. As a rule, universality has to be paid for and a decrease in ergonomic characteristics. But eccentric grinders, reviews of which mark a harmonious combination of functionality with longevity and the quality of the result of processing, demonstrate a reverse example. This is due to the merits of the design of the eccentric mechanisms, which expand the capabilities of the tool, but do not affect other characteristics. As a result, manufacturers with minimal costs produce compact devices that are equipped with productive stuffing and efficient working elements.