The segment of grinding technology is quite widely represented by mechanical devices that allow processing various kinds of materials. One of the most effective options is an eccentric (orbital) device. Due 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 high-quality results. Suffice it to say that an eccentric sander is also capable of polishing operations. In some models, a special mode is provided for this, but the quality of work of most models gives an effect close to polishing already in the standard operating format.
Design and principle of equipment operation
Orbital machines are equipped with a rounded platform, which is a support plate. Grinding elements are fixed on this part, which must be replaced periodically. As a material for working plates, corundum, fleece, felt, sponge, fur and other raw materials are used. Directly fastening the grinding sheet is done in two ways -Velcro or clip. The first option is easy to replace, and the second is cost-effective. Since the eccentric sander leaves a lot of dust behind during operation, some manufacturers also provide a dust outlet in the design, to which a vacuum cleaner can be connected through a channel in the sole of the tool. The sole itself is capable of performing two actions, and at the same time. The main rotary motion ensures fine, defect-free sanding, while the additional reciprocating function secures the quality of the result.
Key Features
Eccentric models are available on the market with power ratings ranging from 150W to 1000W. When choosing a unit for standard simple operations, you should focus on devices with a power potential of up to 400 watts. Power up to 1000 W or more have models that can be used for the purpose of rough cleaning of solid materials. Less common are grinders with a power potential of more than 2000 W, but such a tool is also in demand in wet processing operations. In addition to power, you should also consider the size of the disk. The standard diameter is considered to be 125 mm - this is the option with the optimal oscillation amplitude for final processing. But for more serious work in large volumes, an eccentric sander capable of interacting with wheels of large diameters - up to 215 mm may be required.
In addition to power, the performance of the device is also affected by the speed. Entry-level models have a number of revolutions per minute ranging from 4,000 to 10,000. In older lines, you can find grinders with a frequency of 20,000 rpm. Experts recommend giving preference to a tool with the ability to adjust this indicator, which will make processing more accurate and efficient.
Versatility of eccentric machines
Among the operational features that distinguish orbital sanders, it is worth noting a wide range of applications, that is, versatility. The fact is that in terms of processing quality, such models are comparable to vibration devices, 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 appropriate equipment may be required for the full use of the unit in this capacity. To a large extent, the high versatility that an eccentric sander has is achieved thanks to the discs used. The working element can perform not only rotational and translational movements, but also circular ones, and also provide an oscillatory effect.
Varieties of devices
The use of a design with the presence of eccentrics complicates the device, but for the most part the models are similar to each other. The only fundamental division can be made between household appliances and professional equipment. The household version is characterized by its compact dimensions and modest weight, whichendows it with excellent ergonomics. Basically, this category is represented by eccentric wood sanders, which have low power ratings and are designed for short-term processing sessions. Professional models, on the contrary, have high performance and can be used in the processing of stone and metal. At the same time, these are massive units, the details of which are distinguished by a long working life and good endurance.
Reviews of Makita models
The manufacturer regularly updates the line of grinding equipment, which also includes noteworthy eccentric models. Users note the high power potential of such equipment and ease of use. Of course, a lot depends on the specific modification, but, for example, a Makita eccentric sander with a power of 300 W is capable of performing high-quality processing of rough building materials. Note in Japanese products and an effective dust removal system, which in most cases is implemented through the support panel. By the way, the connection with the vacuum cleaner is implemented without a special adapter, which also increases the ergonomic advantages of the devices. Otherwise, Makita grinders confirm the brand's high status in the construction equipment market - both the build quality and the comfort of the handles with the ability to adjust working parameters are only positive impressions.
Reviews of Bosch models
The German brand has long won the image of not only a reliable manufacturer of household appliances, but also construction power tools. Although users of this brand's products often criticize developers for the very poor performance of budget series, the Bosch eccentric sander, even in the entry-level class, has decent performance. GEX series of inexpensive models enjoys particular success in the market.
In the medium version, the representative of this line is endowed 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 4 m cable, a dust collector with a pleated filter, high-quality fiber circles and general ease of use. Therefore, if you need a comfortable model for home use, then the Bosch GEX random orbital sander can be the best choice.
Reviews about Hitachi models
Worthy models are also offered by the Hitachi brand. In the family of this manufacturer, you can find both household and professional models. The most popular are devices with a power of 200 to 300 watts. According to the owners of such equipment, the models do not differ in special functionality and performance indicators, but at the same time they perform their direct tasks with high quality. Like the Makita random orbital sander, Hitachi units provide good results on a variety ofsurfaces. Also, fans of the brand testify that this product is one of the most economical. Traditionally, power tools have been considered very demanding in terms of energy consumption, but Hitachi's low-power grinders can be put in a number of exceptions.
Instrument cost
The price tag of orbital sanders 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 it 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 above manufacturers are presented. Such a power tool is distinguished 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 materials that are difficult to process, regardless of their surface condition.
Conclusion
Construction multifunctional tools are rarely distinguished by high quality, reliability and accuracy in performing their tasks. As a rule, you have to pay for versatility and a decrease in ergonomic characteristics. But eccentric sanders, reviews of which note the harmonious combination of functionality with durability and quality of the processing result, demonstrate the opposite example. This isdue to the advantages of the design of the eccentric mechanisms, which expand the capabilities of the tool, but do not affect other characteristics. As a result, manufacturers at minimal cost produce compact devices equipped with productive stuffing and efficient working elements.
