The orbital eccentric grinding machine is designed for surface treatment of various materials. Most often, with the help of this tool, wood or metal is cleaned. In this case, the surface becomes perfectly flat, without any flaws.
Grinding machine
Any orbital sander has an engine, a dust collector and a working sole. Additionally, there is a regulator on the instrument with which you can control the speed. There is also a trigger button on the handle. Near the dust collector, in turn, there is a switch for changing the stroke of the eccentric. When you turn on the device, the sole starts to rotate around its axis. In addition, it is slightly shifted from its center, thereby the vibration grinding machine is able to quickly process the working surface.
Buyer Recommendations
When choosing a high-quality grinding machine, you need to carefully study its characteristics indicated in the passport. The main parameter is the power of the device. On average, this indicator is in the region of 300 watts. Then the disk is checked, which has a vibratory sander . It is usually available with a diameter of 125 mm. In principle, this is a normal size that will allow you to quickly clean the surface. Large drives will require a high power device. Next, you should study the parameters of the amplitude of the oscillations. Usually it is 2.8 mm.
Speed control must be present. It will allow you to change the power depending on the material. Also, manufacturers, as a rule, indicate the number of revolutions that the disk makes. This parameter directly depends on the power of the device. A parameter of 10,000 rpm is considered normal. In this case, the minimum values should be within 4000 rpm.
Additionally, manufacturers indicate the frequency of oscillation. On average, it is 20,000 fluctuations per minute. In this case, the minimum values should be 8000 oscillations per minute. Some grinder models have a soft start function. In many cases, it will be useful, so it will only be a plus. The ability to connect the device to a vacuum cleaner is also welcome. The body of the grinding machine itself plays an important role. In order for the tool to be easily held in the hand, it must be rubberized.
Any high-quality orbital sander (pneumatic) is equipped with a lock. It will allow you to work for a long time without clamping the start button. The compactness of the grinder is generally welcome. At the same time, its weight should be within 1.4 kg. In this case, the hand will not quickly get tired of work.
Grinders of the Metabo company
These devices stand out with good power. Moreover, they have excellent performance indicators. The disk that comes with the product is made with high quality, it is able to withstand heavy loads. The value of the oscillatory circuit is within 2.7 mm. In addition, it should be noted that there are many compact models that many will like. Despite the fact that the company "Metabo" is not very famous, it produces good grinding machines.
Model "Metabo FSX 200 Intec"
The diameter of the support disk in this model is 125 mm. The idle speed is 11,000 per minute. At the same time, the rated power consumption is within 240 V. At maximum load, the orbital sander produces 9000 rpm.
The oscillatory contour of this model is 2.7 mm. The weight of the grinder without a power cable is 1.3 kg. A dust collector, one filter and a plastic suitcase for transportation are included with the device. Additionally, a cable length of 2.8 meters is included in the kit. Such orbital grinding machines (market prices) cost about 6200 rubles.
Grinding machines manufactured by Bosch
The company "Bosch" has long managed to establish itself on the positive side. Among the features of grinding machines of this brand , high productivity can be distinguished. Additionally, we note the good quality of all parts.
Thanks to the fan, the engine cools quickly. All this allows you to work with the surface for a long time without the risk of overheating. Using the tool as a whole is very convenient. This is largely due to the unique rotary knob, which is installed in many models. You can also highlight a very high-quality dust removal system. At the same time, the device will remain clean all the time. The controls are good, the speed controller is working properly.
Model "Bosch GEX 125-1 AE"
This orbital sander has a power of 250 watts. The minimum number of revolutions is 7000. In this case, the maximum values reach 12000 revolutions per minute. The amplitude of the oscillations is exactly 5 mm. The diameter of the abrasive wheel is 125 mm, which is the standard size. Among other things, we can distinguish the small weight of the device (it is 1.8 kg). In general, this model can be described as economical and inexpensive. Its cost in the market averages 7600 rubles.
Devices of the company "Devolt"
Sanders "Devolt" stand out with good fastening. Among the shortcomings can be noted inconvenient handles in some models. There are also certain problems with the engine cooling system. The advantages include good stabilization and excellent disk balancing. In this case, vibration from the tool is not transmitted to the handle.
On the positive side, many also characterize grinding machines in which special dustproof bearings are installed. The design of many models is very interesting. At the same time, the shape of the handle is quite convenient. The speed adjustment is comfortable. All this allows you to successfully work with various materials.
Device "Devolt D26453"
This concrete grinding machine has a circle with a diameter of 125 mm. In this case, the oscillation amplitude is within 2.4 mm. The idle speed is 7000. The maximum values of this parameter reach 12000 rpm.
Additionally, you can highlight good performance moves at 24000. The power of this model is 280 watts. This orbital sander is sold with a dust collector. Assembled weight - 1.6 kg. The cost of this model on the market is 9000 rubles.
Grinders "Makita"
The Makita company has been manufacturing power tools for a very long time. All grinders are available with a rubberized case and are very convenient.
Additionally, they have a dust protection system. The fan that cools the engine works well. Also, in many models, manufacturers have installed rotary handles for ease of use. Fastening for sanding sheets is good. Changing the working equipment is obtained very quickly and without problems. In addition, it should be noted that the control of Makita grinders is very comfortable. Using a special wheel, speed can be changed quite simply.
Model "Makita BO5041"
This concrete grinder works perfectly. The power of the model is 300 watts. The diameter of the disk that is mounted on the tool is 125 mm.
There is an electronic controller and the ability to connect to a vacuum cleaner. Among the shortcomings, we note the lack of a soft start function. Among the advantages, many distinguish the compactness of the model, as well as a small weight, which is 1.4 kg.
The grinding sole is made very high quality, which allows you to clean the surface well. In this case, it was positively affected by the indicator of the amplitude of motion. Since the power of the model is large, the speed parameters are decent. In service, this grinder is unpretentious. Dust from the surface to the parts and the motor of the device practically does not get. The average cost of this model on the market is 10,000 rubles.
Summarizing
Given all of the above, the Bosch electric orbital sander looks the most preferable. It has an acceptable cost and satisfactory parameters. For professionals, grinding machines of the Makita brand are recommended. They have excellent parameters and will last for many years.