Cordless grinder: essential tool information

Angle grinders (angle grinders) have long become a truly indispensable device. The first compact products in the former Soviet Union were produced in Bulgaria. That is why nowadays you can often find the name "Bulgarian". Next, we will consider the main properties and features that characterize the battery grinder.

If work is carried out in the field, then the battery grinder is an indispensable tool

Bulgarian "Makita": answers to frequently asked questions

Domestic consumers have long fallen in love with the machines presented by Makita. This manufacturer has long been at the forefront of the world's leading manufacturers of construction tools. The highest quality, excellent performance parameters, the strictest observance of guarantees - all these advantages the Japanese company has won over a century of its activity.

The Makita grinder is equipped with lithium-ion battery packs with large capacity and power

Makita angle grinders are multifunctional devices. Speaking about what the grinder of this company is for, it is worth noting that it allows you to saw and grind tiles, brick walls, concrete blocks, metal products and other hard materials. The Makita angle grinder can be used both in the process of work related to dismantling, and during the cleaning of various surfaces.

It is interesting! Many craftsmen are wondering how the grinder is correctly called. So, the correct name of the tool is an angle grinder, or abbreviated angle grinder.

Regardless of the model, each Makita battery grinder has the following advantages:

• significant power reserve;
• effective limitation of starting current;

The handles of the Makita battery angle grinder are covered with special elastic rubber to relieve tension from the muscles of the operator's hands

• the ability to set the required number of revolutions;
• the ability to replace the nozzle without using a key;
• availability of the option of smooth adjustment of the speed.

In addition, Japanese specialists have managed to develop many original innovations. For the purpose of maximum protection, the Makita rechargeable angle grinder is equipped with a special bag for collecting dust. And with perfectly compatible adapters, you can even connect to a vacuum cleaner.

As for the shortcomings, they were not found in the devices of this company. In order to understand which machine to give preference to, you should carefully read the different models of the battery grinder (user reviews will help you make the right choice).

The Makita grinder is equipped with a special dust bag

Battery grinder: main secrets of popularity

One of the most important features of the battery-powered angle grinder is the possibility of completely autonomous operation. This means that it is not at all necessary to lay the cable from the power outlets. At the dacha, in the forest, at construction sites - you can use this tool anywhere.

Note! An important advantage of the cordless grinder is its high safety during its use. By giving preference to this tool, you can completely protect yourself from electric shock, and also be able to perform work in rooms with high humidity.

Due to the simple design of the grinder on the battery, the reviews about this tool are often the most positive. Despite the fact that every apartment has electrical outlets, in hard-to-reach areas such a grinder is much more convenient than an electric tool that is connected by means of a cord. Replaceable batteries are charged from outlets.

Arguing about which grinder is better, we can safely say that it is rechargeable. Its main advantage is portability. Such a tool is characterized by compactness and lightness. Compared to mains-powered products, the battery versions emit much less noise during operation.

The grinder, operating from a battery, is used where there is no 220 volt alternating network

Another undoubted advantage of tools with a battery is the insignificant power of the grinders. The electric motors with which they are equipped operate at fairly high speeds. Due to this, it is possible to perform work with small disks with no less efficiency than when using large elements. The increased speed of rotation gives a neatness to the processed material, while eliminating the possibility of scratches.

One of the most common questions that arise after purchasing a device boils down to how to use a grinder. If possible, you can connect the charger that comes with the grinder to any of the nearby outlets.

Important! During the operation of angle grinders, you should always correctly install a special casing that performs a protective function. It not only reliably protects the material that can be processed from sparks and particles, but also protects it from fragments if the disc bursts during operation.

Despite the fact that the grinder is equipped with a battery, its weight is still usually less than that of network relatives

If the device is equipped with an option to adjust the rotation speed, the best solution would be to use the maximum possible for a particular disc. When cutting, it is best to feed extremely smoothly and without excessive pressure. If the tool is skewed, the cut will be uneven and the disc may break.

If it is necessary to perform rough grinding, if it is necessary to remove a significant layer of material, it is better to give preference to a roughing disc. In this case, the tool must be kept at a slight inclination to the surface. It should be checked that there are no deep grooves in the material that can be processed.In no case should cutting discs be used for roughing. They are too thin and break even at the smallest lateral bends.

If a long stream of sparks is noticed during operation with the diamond blade, this indicates that the device is dull. This can be remedied by making multiple cuts with this disc in any of the hard materials. If the sparks form a solid ring, this means that complete wear of the surface has occurred, and you cannot do without replacing the disc.

Battery-powered angle grinder is also used for cleaning work to remove dirt, paint, rust

Rechargeable angle grinder: rating of the best models

To get an approximate idea of ​​the varieties of cordless grinders, we offer an approximate rating of grinders of various prices - from the cheapest options to expensive professional ones.

Encore Accu Master AKM-1825

Ankor handicraft is an inexpensive, but rather high-quality device. Its design is characterized by simplicity. The standard kit includes:

• casing;
• side handle;
• several rechargeable batteries;
• spindle nut wrench.

Neither the batteries themselves nor the charging device have a special indicator. The charging process takes quite a long time, which causes certain inconveniences. As for the engine, in this model it is rather weak, it overheats quickly. If it is required to grind "heavy" materials characterized by viscosity, this device will not work at all.

Grinder Enkor Accu Master AKM-1825 having the lowest cost and high build quality

Possessing certain disadvantages, Akku Master is significantly cheaper in comparison with its competitors. In addition, not every expensive unit can boast of such compactness.

Cordless grinder "Metabo WB 18 LTX BL 125 Quick "

The specialization of the German company "Metabo" is the production of productive and reliable tools, which are created for true professionals. The machine of this model is equipped with lithium batteries, which are made using a special technology called LiHD. Such batteries are capable of delivering quite a lot of power. The batteries are equipped with an overload protection system, as well as an option for monitoring the degree of heating and displaying the charging level.

It is interesting! Thanks to the special design of the batteries and the use of a brushless mechanism, it became possible to form a unit characterized by high power and reliability.

Cordless grinder "Metabo WB 18 LTX BL 125 Quick" is equipped with lithium batteries

The design of the presented machine is distinguished by unsurpassed thoughtfulness. The cooling channels are equipped with special filters that can be easily cleaned and changed without resorting to total disassembly of the product.

The front handle is equipped with an anti-vibration pad. Thanks to the spindle brake, the disc can be stopped in a matter of seconds. The discs can be easily changed without additional tools. The protective cover is locked with a convenient key and can be easily rotated into the desired position.

Despite the high cost of this unit, its excellent power and exceptional reliability are well worth the investment.

Cordless grinder Ryobi One + R18AG-0

The Japanese company "Ryobi" in Europe has won the fame of a supplier of inexpensive, but very high quality tools. The presented model belongs to the budget. Its peculiarity boils down to the fact that it can operate both from modern lithium batteries and from batteries that were assembled from cadmium-nickel parts.They are weaker in comparison with lithium ones, but at the same time they differ in a significantly lower cost.

The body of the Ryobi One + R18AG-0 cordless grinder is made in a shape that is comfortable to hold

Japanese designers provided all the necessary elements for the convenience and safety of the device. The body, made in a shape that is comfortable to hold, is equipped with a rubber non-slip coating. On the gear housing, in addition to three sockets for installing the handle in various positions, there is also a heel. You can install the machine on it in such a way that the disc will be directed upwards and at the same time will not be damaged. Thanks to the spindle lock, the disc replacement process is significantly accelerated.

Related article:

Grinder attachments: a variety of tools for angle grinders

Classification by material and purpose. Cutting, roughing and grinding devices. Wall chaser nozzle. Chainsaw grinder.

As for the diameter of the tool used, it is limited to 115 mm. For a compact and lightweight device, this is only an advantage. Thus, the consumer is given the opportunity to appreciate the genuine Japanese quality at a pleasant price.

LBM Hitachi G14DSL: a representative of the middle class

Having many features of a professional product, the presented Japanese machine is characterized by a simpler design.

The elongated body of the Hitachi G14DSL grinder is covered with a special anti-slip compound and completely covers the battery

The rechargeable lithium battery, which has a voltage of 14 volts, has a capacity of 3 ampere hours. This ensures long-term operation without changing the battery. The set of this grinder contains a very fast charger that fully charges the device within an hour. In addition, the sander set includes an additional rechargeable battery.

It is interesting! The tool is fastened to the spindle by means of a flanged shaped nut. And although this is not entirely convenient, in the case of home use it is not so important.

The machine itself is characterized by its convenience and compactness. The elongated body is covered with a special anti-slip compound and completely covers the battery. At the same time, the length of the body does not even reach 30 centimeters. The spindle lock makes replacing discs much easier.

Hitachi G14DSL Grinder Kit Includes Extra Battery

Bulgarian "Bosch": German quality, time-tested

In the line of popular construction accessories, a separate position belongs to angle grinders, which are used both in everyday life and in the professional field. Among the well-known manufacturers who produce such products and have earned the trust of consumers around the world is the German brand Bosch.

Cordless grinder "Bosch": main features

Perhaps the most common Bosch product line is the GWS range. The company presents to the attention of consumers both electric and pneumatic, as well as accumulator units. To date, it is the devices powered by batteries that have earned the greatest respect. This is not surprising, because they are mobile, allowing you to perform small professional work.

It is interesting! The basic criteria for the quality of tools of this brand are power, comfort during operation and ergonomics of the case. This is evidenced by the positive feedback from the owners of grinding machines.

Bosch produces electric, pneumatic and battery grinders

Among the distinctive features of this brand's angle grinder are the optional features that the manufacturer decided to endow its products with. These include:

• tool balancing;
• vibration protection during operation;
• the presence of a pivoting bracket-handle;
• the presence of a casing for a vacuum cleaner;
• the presence of the SDS nut.

Today, there are two types of machines on the market - one- and two-handed.

Battery grinder Vosch: dignity and disadvantages

The tools offered by Bosch are personalized. Their advantages include:

• high degree of reliability;
• multifunctionality;
• powerful and high-performance engines;
• ease of use;
• light weight;

Bosch cordless grinders are distinguished by a high degree of reliability

• affordable cost;
• durability.

The secret of long service life is the presence of a gear housing and ball bearings made of high-strength materials. In addition, the assemblies are characterized by a double level of sealing, which helps to reduce the risk of premature wear of parts.

Note! Despite the significant advantages, the Bosch cordless angle grinder is not without its drawbacks. Devices that are professional are of high cost.

Mini grinder: although small, but very remote

The key feature of mini grinders is a large number of their modifications. Because of this, choosing a specific model can be quite difficult. The main difference between a miniature angle grinder and a large grinder is the size of the disk.

Mini grinder does not require additional handles

Mini grinders differ in the following parameters:

• degree of engine power;
• speed of rotation;
• mass;
• size;
• options.

Dimensions represent the main difference between small devices and classic machines. Mini-sizes suggest a standard grinder with a set of necessary elements. Thanks to various grinding or cutting wheels and complementary details, the capabilities of the device only expand.

Due to the versatility of small machines, various tasks can be carried out with a high degree of precision. The mini-unit is able to cope with jewelry work, while classical devices simply cannot.

Despite the fact that the cordless mini-grinder and the regular-sized tool have similar functions, it is worth noting that the first device is endowed with many positive qualities. For example, a small machine is easier to hold in your hand. The employee will not suffer from physical fatigue during long operations.

The main difference between a mini grinder and a large one is the size of the disc

Mini-guns don't even have a protective rim. However, no one canceled compliance with safety rules. Regardless of the size of the device, the technical requirements are mandatory.

Note! Some people consider mini-products to be very unreliable precisely due to the lack of parts typical for a conventional tool. However, the danger lies in using incorrectly sized circles. They can cause injury in case of negligence in the selection process.

Due to the absence of an electric cable, working with a grinder turns into a very convenient process. Talking about which grinder to choose, 125 mm (meaning the size of the circles) is a great option. However, when choosing the size of the tool, it is also important to consider the processing material. For example, when working with metal, it is better to give preference to the smallest discs. At the same time, a wood grinder can be equipped with larger parts.

Cordless grinder: a few words about possible malfunctions

Armed with knowledge of the design features of angle grinders, it will be quite easy to determine the basic faults that may be encountered during the execution of work. For example, problems with the electric motor do not always cause a total malfunction of the device. This often only limits functionality.

In battery-type grinders, bearings are very often worn out.

Perhaps the most common nuisance is the burnout of the resistor resistance, which provokes the inoperability of the power button. By the way, not all models are equipped with this element. However, the malfunction can be easily remedied by replacing the elements that are causing the malfunction. A similar problem can arise if dust gets under the holder. This can be corrected by cleaning the contacts and, if necessary, replacing the button with a new one.

In general, all the malfunctions that can befall this tool (grinder) are divided into two types:

• electrical character;
• mechanical plan.

Mechanical problems mean bearing wear. This problem is manifested by increased cabinet vibration, excessive noise and heat.

The most common malfunction is the burnout of the resistor resistance of the grinder

To eliminate it, you just need to remove the parts, replace them and lubricate with an additional agent. In appearance, it is easy to determine the failure of the gear teeth. This can be corrected by replacing the gear.

Note! Most mechanical problems can be easily avoided by timely maintenance of the tool. For example, grinders require cleaning of components, as well as replacement of lubricants and damaged elements.

As for electrical faults, rotating elements in the electric motor often fail in tools. If we are not talking about a brushless grinder, you can also face such a nuisance as wear of brushes, a collector or a gearbox.

Replacement of brushes is required if excessive sparking is observed inside the housing of a working device. Normally, it is even or invisible. The anchor of the mini-product breaks due to heavy load. Typical manifestations of a malfunction are burning, arcing and heating of the case. As for the repair of this electrical part, it is better to trust it to professionals.

For Bulgarians, rotating elements in the electric motor often fail.

How to choose a grinder for your home: main secrets

When thinking about which grinder to choose for the home, it should be borne in mind that the right choice will require the ability to perform analysis and comparison. The main parameter of the tool is the idling speed indicator. This is what is the power indicator. Thus, powerful models are characterized by higher performance.

Due to the fact that grinders are equipped with additional options, the decision of the question of which grinder to choose is complicated. On the other hand, additional elements make material handling easier.

For example, the automatic wheel blocking helps to eliminate roughness in the grinding and cutting process caused by vibration caused by worn discs. The inrush current limiting mode ensures the stable performance of the tool with the usual parameters of a standard electrical network.

The attachment provided by the optional handle makes cutting much easier. Without it, you will need to exert strong physical pressure. Additional comfort is provided by a special coating that helps to reduce the force of vibration. As a result, materials can be processed with the highest precision.

Choosing a grinder on a battery - it is better not to save money, otherwise the tool will lie idle

Note! It is easier to make neat cuts with the optimum disc size. For example, circles with minimum indicators are used for curly operation. The more accurate and thinner the work, the smaller the disc size should be.

If we are talking about which grinder to choose for the house, you should take into account that the best option would be a product with a disc diameter of 125 mm. The size of this element determines how deep the cut will be. The optimum circle thickness is between 1 and 1.2 mm.

When choosing a tool, it is important to remember that the best grinders are devices that are convenient to use. The tasks that have been set are important. For example, connoisseurs of lightness and compactness will like battery products, and large angle grinders will not be enough if you have to cut a thick metal profile or viscous materials.