An eccentric grinder with a random circular path of abrasive movement was created relatively recently. The possibility of combining arbitrary reciprocating and rotary movements in one grinding device was first demonstrated by the German company Festool in 1976, and in 1982 the company released an industrial prototype of this tool to the market. An eccentric orbital sander provides the quality of a cylindrical grinder, but at the same time has the performance close to a surface grinder. Its abrasive wheel moves along random, non-repeating trajectories, which allows you to avoid moving along the same areas of the processed material and the formation of circular and longitudinal marks. In English, this type of grinding tool is called random orbit sander, which can be translated as “orbital sander with a random (arbitrary) trajectory.”
Features and criteria for choosing eccentric sanders
An eccentric type sander has a design that produces both circular and reciprocating movements .
Due to this, there is no need for repeated processing in the same place, which eliminates the appearance of scratches on the surface.
When purchasing an eccentric sander, you need to pay attention to the following parameters:
- Rotation speed and range of motion. The optimal speed is 2-4 thousand revolutions per minute. The amplitude should be smaller. This achieves a refined grinding effect. If the grinding is rough, a device with a speed of about 10 thousand per minute is suitable.
- Performance. When choosing this option, it is worth considering the area and the selected option. Large-scale working surface and high speeds provide greater productivity.
- Duration of the working cycle. For long-term operation of the device, it is necessary to choose models with high-quality parts and materials.
- Terms of Use. If the workplace is characterized by excessive dust, high humidity, or a high fire hazard, it is better to choose a model with an increased level of protection.
Note! Pneumatic sanders are considered universal. They can function in any conditions.
What is an eccentric sander
ESM is a tool that appeared in the second half of the last century. The German company Festool was the first to produce such devices. They are used for grinding metal, wood and even plastic.
The quality of processing of these power tools is in no way inferior to models that are equipped with a conventional grinding disc. EShMs also process materials evenly without damaging their surface.
Additional Information! Today, a huge number of such devices are produced and therefore people often do not know how to choose an eccentric sander for wood and metal.
The best battery models in terms of price and quality ratio
Let's take a look at the best cordless eccentric sanders, powered by a battery with an ideal price-quality ratio.
Rating of the TOP 4 best eccentric sanders in terms of price and quality ratio.
DeWALT DCW210N
This model is lightweight, making it ideal for long-term use.
For maximum comfort, the device is equipped with a speed control lever and a speed stabilization system.
Safety is ensured by the dust collector, so the sander can be used in any room.
The disc rotation speed is ideal for rough work when large-scale surface cleaning is required.
Specifications:
- the highest disk rotation speed is 12,000 rpm;
- disc diameter - 12.5 cm;
- voltage - 18 V;
- dimensions - 127 x 170 mm;
- weight - 1.7 kg.
Advantages
- low vibration device;
- high performance;
- compact dimensions;
- ease of use;
- high-quality assembly;
- power;
- ergonomic design.
Flaws
- poor equipment;
- the attachment of the dust collector is poorly thought out;
- The disc wears out quickly.
BOSCH AdvancedOrbit 18 0
This model is characterized by maximum safety, reliable protection against accidental activation.
The disk rotation speed can be adjusted by choosing the optimal operating mode.
With this machine you will be able to efficiently sand wood, plastic, plastic, and metal surfaces.
High power and disk rotation speed make it possible to carry out serious work for a long time.
The manufacturer also took care of the convenience of the design, which allows you to expand the width of the passage of the device.
Specifications:
- the highest disk rotation speed is 24,000 rpm;
- disc diameter - 12.5 cm;
- voltage - 18 V;
- dimensions - 125 x 160 mm;
- weight - 1.4 kg.
Advantages
- high power and performance;
- good quality of grinding of any surfaces;
- protection against accidental activation;
- presence of a discharge indicator;
- high-quality assembly;
- quiet operation;
- low cost.
Flaws
- no battery included;
- unreliable battery fastening;
- There is no additional handle for more comfortable work.
Makita DBO180Z
A good sander from an American manufacturer with an ergonomic design and a non-slip rubberized body.
Thanks to these characteristics, vibration is significantly reduced.
The speed range allows for both rough and delicate work.
The mode is selected depending on the type of surface. Locking the power button provides maximum protection and safety.
Specifications:
- the highest disk rotation speed is 11,000 rpm;
- disc diameter - 12.5 cm;
- voltage - 18 V;
- weight - 1.7 kg.
Advantages
- excellent grinding quality;
- long-term operation on a single battery charge;
- carefully thought out design;
- ergonomic design;
- compact dimensions;
- fits comfortably in the hand.
Flaws
- poor equipment;
- sometimes there is not enough power for full and fast work;
- easily soiled body.
AEG BEX 18-125-0 box
Standard sander with a good range of functions. Allows you to polish any surface.
It has a high-quality dust collector, so you can work unhindered in any conditions.
Battery operation ensures unhindered sanding, which is very convenient for the finishing stage.
It is also possible to work in rooms where there is no access to power. The battery charge lasts for a long time.
Specifications:
- the highest disk rotation speed is 11,000 rpm;
- disc diameter -12.5 cm;
- voltage - 18 V;
- weight - 1.9 kg.
Advantages
- good dust collector;
- affordable price;
- comfortable handle;
- ergonomic design;
- excellent build quality;
- ability to work offline.
Flaws
- The battery runs out quickly;
- poor equipment;
- soiled surface.
What types of grinders are there?
Surface grinding machine BISON ZPShM-300E-02
Delta grinder Interskol PShM-32/130
Belt sander Hammer LSM 810
| Eccentric (orbital) | They are considered one of the most effective for grinding and polishing various surfaces. They are also called orbital, because the base of the tool rotates in orbit while simultaneously scrolling along its axis. |
| Surface grinding (vibrating) | This type has a rectangular base and a clamping mechanism at the edges. The advantages include low cost and availability of consumables. |
| Tape | Belt sanders are used for grinding metal, wood, and plastic. Mainly for rough use, removing old paint and varnish. The downside is the loud noise. |
| Delta vibratory sanders | This instrument has a delta-shaped sole, reminiscent of the shape of an iron. Used for grinding and polishing edges, corners and hard-to-reach places. |
You can, of course, use a grinder (angle grinder) for grinding work, but it is better suited for rough surfaces using roughing brushes; for finishing, special eccentric attachments are suitable.
Also, some angle grinders do not have speed control. It is very difficult for her to work in hard-to-reach places and over long distances.
For walls and ceilings, you can choose the ASPRO-C8® ESM (GIRAFFE) - technical characteristics:
Designed for sanding dry walls and ceilings. Due to the smooth adjustment of the electric motor and the rigid sole, the surface quality is suitable for applying the finishing layer, followed by painting and wallpapering.
- Voltage 220V;
- Power frequency 50 Hz;
- Engine power 710 W;
- Grinding wheel diameter 225 mm;
- Grinding wheel speed 600-1500 rpm;
- Weight 4.2 kg;
- Includes hose for connection to a construction vacuum cleaner
- Average price - 30,000 rubles.
The best network models in terms of price and quality ratio
Let's look at the best models of eccentric-type sanders that operate on mains power with a good price-quality ratio.
Wert EES 125DE, 350 W
Among similar devices, this grinder has good technical parameters at an affordable price.
The Russian manufacturer made sure that with the help of this device it was fully possible to carry out small-scale work.
Therefore, this model is ideal for home use.
The power and vibration frequency of the working platform cope well with sanding furniture and small structures.
The only significant drawback is that the machine is not suitable for processing metal surfaces.
Specifications:
- the highest disk rotation speed is 13,000 rpm;
- disc diameter - 12.5 cm;
- power - 350 W;
- dimensions - 160 x 218 mm;
- weight - 1.5 kg.
Advantages
- low price;
- availability of power adjustment;
- high-quality assembly;
- reliable design;
- performance;
- functionality.
Flaws
- The dust collector allows dust particles to pass through;
- The cord is too stiff to connect to the mains;
- makes noise during operation.
DeWALT DWE6423, 280 W
A device from a German manufacturer, which is distinguished by high build quality, reliability, and long service life.
Ideal for domestic carpentry work. Helps to efficiently clean walls and ceilings during repairs.
Technical parameters allow you to clean both significant coarse layers and grind delicate surfaces.
The rotation speed of the disk can be adjusted to suit the required material.
Specifications:
- the highest disk rotation speed is 12,000 rpm;
- disc diameter - 12.5 cm;
- power - 280 W;
- dimensions - 140 mm;
- weight - 1.28 kg.
Advantages
- comfortable ergonomic design;
- good dust collector;
- comfortable work;
- functionality;
- long cord for connecting to the mains;
- original design.
Flaws
- high noise level;
- poor equipment;
- It is difficult to find suitable spare parts for this model.
Makita BO5031, 300 W
Good power and light weight provide maximum comfort during operation.
All of this brand's power tools are made in the USA. Therefore, this model is famous for its excellent American quality.
The device is equipped with electronic regulation of the speed and vibrations of the platform.
The comfortable rubberized handle prevents slipping and ensures stability during operation.
The only minor inconvenience is the poorly thought out design of the dust collector.
Specifications:
- the highest disk rotation speed is 12,000 rpm;
- disc diameter - 12.5 cm;
- power - 300 W;
- weight - 1, kg.
Advantages
- presence of 5 speed modes;
- high-quality dust collector;
- strong fastening of sandpaper with Velcro;
- low cost;
- comfortable handle;
- high build quality.
Flaws
- short electrical connection cord;
- the first speeds are very weak;
- noisy work.
Instar EShM 90550, 550 W
A reliable device from a domestic manufacturer at a budget price. Ideal for grinding work at home.
It has five speeds, which allows you to choose the optimal mode.
It is worth noting the high wear resistance of the sole, which significantly increases the service life of the unit.
The dust collector is small in size, but does a good job of cleaning the air.
Specifications:
- the highest disk rotation speed is 13,000 rpm;
- disc diameter - 15 cm;
- power - 550 W;
- weight - 1.9 kg.
Advantages
- budget cost;
- good equipment;
- high power;
- high-quality assembly;
- reliability;
- ergonomics.
Flaws
- the placement of the power button is not thought out;
- short wire for connecting to the mains;
- The sole wears out quickly.
Makita BO5041, 300 W
One of the main advantages of this model is its comfortable, ergonomic body. Every detail in the design is well thought out.
The power is suitable for both rough work and delicate sanding.
The presence of several modes allows you to choose the most comfortable working conditions.
The dust collector is easily attached, which saves time on cleaning after repair work.
Specifications:
- the highest disk rotation speed is 12,000 rpm;
- disc diameter - 12.5 cm;
- power - 300 W;
- weight - 1.4 kg.
Advantages
- reliable design;
- a light weight;
- ergonomics;
- comfortable grip;
- good build quality.
Flaws
- short electrical connection cord;
- slows down at initial speeds;
- It takes a long time to polish wooden surfaces.
BOSCH PEX 300 AE, 270 W
A manufacturer from Germany presents a grinding machine with a wide range of applications.
The device makes it possible to fully process wooden, metal, and putty surfaces.
This model is in the middle price segment and can be used on professional construction sites.
The unit is fully equipped. After purchasing, you will not need to buy anything additional.
It is also worth noting the reliable and ergonomic design, which ensures ease of use.
Specifications:
- the highest disk rotation speed is 12,000 rpm;
- disc diameter - 12.5 cm;
- power - 300 W;
- weight - 1.7 kg.
Advantages
- ergonomics;
- ease of use;
- nice design;
- low cost;
- rich equipment.
Flaws
- short cord;
- the sole wears out quickly, especially with frequent use;
- The dust collector does not collect dust very effectively.
Types of Grinding Tools
Wheels are a grinding tool responsible for surface treatment.
There are several types of grinding tools that are often used in ESM. The most common varieties include the following:
- circles made on an organic or ceramic basis;
- CBN wheels made of ceramics for processing metal products;
- diamond tools for sharpening knives and other cutting products;
- synthetic diamond stones intended for honing parts.
Important! When choosing an ESM, you need to familiarize yourself with what types of grinding tools the model supports.
№2 – MIRKA CEROS 650CV
Price: 36234 rubles.
Mirka CEROS 650CV is an eccentric grinder with very modest dimensions, and it weighs less than a kilogram. At the same time, its power ratings of 350 W and rotation speed up to 10,000 rpm with the possibility of their adjustment ensure high quality work. The maximum disc diameter is 150 mm.
Low vibrations, low weight and ergonomics allow you to operate the model with literally one hand without unnecessary strain. Mirka CEROS 650CV was awarded second place in the rating for the optimal combination of power and extreme compactness. If you have to work in limited space, then this model will simply become an indispensable tool.
MIRKA CEROS 650CV
№1 – FESTOOL ETS EC 150/5A EQ
Price: 44625 rubles.
And finally, the leader of the rating is the Festool ETS EC 150/5A EQ orbital sander. Its compact dimensions and light weight are combined with a good power of 400 W and provide rotation up to 10,000 rpm. The maximum disc diameter is 150 mm. First-class build quality, sanding pad brake and EC technology contribute to durability. The built-in vibration reduction system will protect your hands, and the dust collector will eliminate flying dust. The Festool ETS EC 150/5A EQ is a quality sander that can be used in any position, even on overhead surfaces, without straining yourself. The quality of grinding will always remain at the highest level. Everything in this device is thought out and functional: from the stabilization system to the geometry of the case. Choosing a sander is not the easiest task, and we hope that we could make it at least a little easier for you. Choose one of the proven tools, and then the risk of getting a pig in a poke instead of a reliable and effective tool will be minimized. And remember that the best sander is the one that suits your needs and fits your needs.
FESTOOL ETS EC 150/5A EQ
No. 4 - Bosch GEX 125-150 AVE
Price: 17820 rubles.
GEX 125-150 AVE is an eccentric grinder from the German brand Bosch. Among its advantages are a solid power of 400 W and a maximum rotation speed of 12,000 rpm with the possibility of their adjustment. The maximum disc size is 150 mm. There is a dust collector and an additional handle. The Vibration-Control system protects your hands from the negative effects of vibration during prolonged continuous work. In general, the Bosch GEX 125-150 AVE is a powerful and reliable high-quality electric motor that does not clog, hardly heats up and maintains speed well.
Bosch GEX 125-150 AVE
