Which Bulgarian is better? We study, we define, we choose ...

Angle grinder (angle grinder) - it is also "Bulgarian" - this is a power tool, which is a type of grinder. The set of its "functional" includes various operations associated with cutting, cleaning and grinding parts from any material. Scope of application: metalworking, construction, domestic needs.

 

Scope of application. Bulgarian professional and household

Bulgarian refers to the tools for universal use - this machine is capable of performing a large list of operations. True, for their different types, it is necessary to change the working “organs” themselves - attachments. Then the Bulgarian cuts, grinds, cleans stone, metal, wood and other materials.

In everyday life, this tool is not used every day, but if necessary, one cannot do without it - the century of manual labor is a thing of the past. Angle grinder saves you time and effort.

Depending on the mode of use and engine power and other components distinguish Bulgarians:

• home use;
• industrial use.

Household "bolgar" is mainly a device of low power, "elegant" comfortable size. They will not survive in the industrial sphere, since they are demanding of their operating conditions - we work for about 15 minutes and rest for the same amount. Otherwise - overheating and ...

LBM device diagram

Industrial angle grinders are workaholics. Such tools are capable of productive work for a long time without interruption and overheating. These qualities of a professional tool in the case of grinders are put on the scales and two other parameters: weight and cost. They also increase their values ​​in the “professional” category.

When choosing a tool should focus on the convenience of working with him and its effective ability to work. The price factor is also not unimportant detail. Professional equipment breaks, of course, less often, but its repair costs more.

We will understand the nuances of the tool selection ...

The cutting plane should be pointing away from the face.

Signs of classification

Any electromechanical instrument is characterized by many parameters, among which the power of the device never stands in last place. Let's start with her!

Power

The power of the Bulgarian determines its interrelated parameters: capabilities (performance), dimensions, mass. Existing models of angle grinders fit in the power range from 0.5 kW to 2.7 kW.

Common "household" representatives of this tool are capable of developing from 800 to 1000 W of effective power, sufficient to perform most of the operations in a household. For a long-term "industrial" or hard domestic work (we cut concrete, brick, etc.), a grinder with a power of 1.5 kW should be selected.

But this parameter is interconnected power, but not the main characteristic of LBM. The determining technological parameter is the maximum diameter of the installed disk.

What disk diameter for the grinder is better: 115, 125, 150, 180 or 230 mm

For angle grinders, discs with a diameter of 115 mm to 230 mm are used. Practically capable of cutting only the part of the disk, protruding beyond the body of the grinder.

Therefore, when choosing a disc of 115 mm, you can cut through the thickness of the material no more than 25-30 mm.In the process of using the disc, this parameter decreases, since the disc wears out (erased), and considering the number of revolutions and the performance of such units, this happens quite quickly - a couple of minutes and the disc “disappeared”.

MAKITA - THE EXAMPLE OF PROFESSIONALISM IN THE LEADER RULER

When choosing a tool, it is necessary to initially analyze its future tasks and choose the right disc diameter:

• 115 mm - suitable for grinding, suitable for cutting only "small" parts. The tool for such disks has low power and, accordingly, a “convenient” mass for operation;
• 125 mm is a popular size. The Bulgarian for such a disc is ideal for home use. And all the varieties of grinding and cutting discs are adapted to the maximum diameter for this very diameter;
• 150 mm - a kind of middle between the 125th and 180th disc. You can take it for home, but for greater convenience, if you have financial opportunities, it is better to choose two separate tools;
• 180 mm - inconvenient for small jobs, optimal for construction and industrial use. Able to cut like a pipe and a brick;
• 230 mm - the maximum size of the "Bulgarian" circle. This Bulgarian will be ideal for large-scale construction work and ineffective in terms of ergonomics when performing minor work.

In principle, with the definition of the required disk diameter, one should begin the selection of the grinder, and then “add” its power to the analysis. If a Bulgarian of 600 W is suitable for one-time work with a circle of 125 mm, then for long-term work with the same range it is advisable to choose a tool of 1-1.5 kW. A more powerful LBM will be less “tired” under load and, accordingly, its work cycles will be longer, and the “life” period will be longer.

Attention! In no case can not use larger diameter disks on grinders, designed to work with smaller disks. This will require invalid, from the point of view of TB and common sense, removing the protective cover of the grinder, and the imbalance and inconsistency of parameters can lead to inadequate "actions" of the tool when the disk is jammed.

 

Variants of functional disks for angle grinders

The following types of disks are used in working with angle grinders:

• cut off on metal;
• stone cuttings;
• stone for dry work;
• stone for wet cutting;
• combined diamond wheel for cutting tiles;
• petal type discs;
• a mandrel under disks with a flypaper;
• metal wire brushes for cleaning disk or cup form factor.

An important point of choice! If you are planning “dusty” work related to cutting stone, brick, plaster, worry about the availability of a dust protection tool in your chosen model for such work. Unprotected Bulgarian will not last long in a dusty environment.

The number of revolutions of the spindle grinders

When choosing a grinder, you are unlikely to pay attention to the number of revolutions of its spindle. This, of course, is an important parameter in the operation of the tool, but it has already been optimized by the manufacturer for a specific model of the Bulgarian.

Interesting from a practical point of view is the possibility of smooth adjustment of revolutions. This function may have powerful grinders, but more on that below.

For general information: the speed of rotation of the disc of the grinder is in the range from 2800 rpm to 6600 rpm. Some models of Bulgarian for discs up to 125 mm have a rotational speed of up to 11,000 rpm.

Ergonomics and ensuring safe operation

Since the Bulgarian is still a hand-made tool, its usability is determined by the “organs” of human interaction.

Easy handling and reliable protection

For convenient work and reliable holding of the tool in the hands of the Bulgarian should be equipped with practical handles. Their thoughtful options also play an anti-vibration role.

Reasonable ergonomics in the handle

The provided options for right-handed and left-handed installation of the handles will make it equally comfortable to operate the tool for “left-handers” and traditional “right-handers”.

Two-hand grinder option

When choosing a grinder, you must also take into account its mass. LBM with a power of 0.6-0.8 kW weighs about 1.4-2 kg and usually has one handle. For grinding is best suited just such a tool. "Kilowatt" power grinders will create a load on the hands of 1.9-2.3 kg. And the "giants" in 2-3 kW will not have less than 3.5 kg.

The presence of a protective casing on the grinder is required! Without it, you will play Russian Roulette with your life. The fact is that the disks for the grinder are rather thin, and they rotate at a tremendous speed. A substandard disk or its defect can lead to rupture and scattering of fragments, which will inevitably lead to injury. Therefore, the presence of the casing is not discussed.

Minimum dust in work

When working on stone, brick or plaster, it makes sense to purchase a casing that allows you to connect the vacuum cleaner hose to yourself. Such casings are suitable for 230 mm discs and may also have a guide bar for uniform cutting of the stubs.

Safety guard with guide bar

Change disks on the grinder

Convenience maintenance tool determines the additional time for the "recharge" - change the disk. In the Bulgarian for this device provides a spindle lock. By pressing the stop button, the driven gear is locked, and the nut is unscrewed with a key.

There are options for clamping nuts that allow you to work with yourself without a key. Such a composite nut is clamped by hand, and when the lower part of the nut stops against the surface of the disc, it is tightened by rotating its upper part by hand. Such systems are especially relevant with frequent change of disks on the instrument.

The nut of the standard grinder works for self-tightening, which leads to more complicated unscrewing than tightening.

Functional and protective automation

Convenience and safety of work with the tool are promoted by additional functional "frills" of the tool.

Smooth start

The Bulgarian, equipped with a soft start system, suffers less from short-term critical overloads at the time of launch. It is especially important to equip such a system with powerful Bulgarians, which have a significant mass of parts and the disc itself. Then, when turning on, the angle grinder smoothly turns around, does not twitch in the hands, and the motor windings and brushes do not experience strong current surges.

Adjustment of turns

The engine speed adjustment system of the grinder allows you to select the spindle speed for any task: cutting, grinding, cleaning, etc. These are additional conveniences designed to optimize tool operation modes.

Stabilization of turns

The system of stabilization of the spindle rotational speed when changing the load on the disk greatly facilitates the processing of massive labor-intensive parts.

Disk wedge protection

The jamming of the disc in the slotted material is a very dangerous phenomenon, especially for powerful Bulgarians. The tool will simply break free from the hands with unpredictable consequences. To avoid this, a professional tool is equipped with anti-jamming of the blade. In the case of a "wedge", the tool just instantly de-energizes.

Secondary start fuse

If the power supply to the instrument was cut off at the time of its operation (someone, for example, pulled the plug out of the socket), then when the power supply is restored, the Bulgarian can be protected by a safety system from spontaneous secondary start.

Brush protection

The brand tool can be equipped with a safety system for switching off the motor brushes when the supply voltage is lost. Re-activation of the rotating collector of a powerful engine threatens to burn the contact group. A system can also be provided for shutting off the brushes when they are significantly worn.

Balancing system

In the process of working with powerful grinders, the disc is generated unevenly, and certain vibrations of the tool arise, which do not positively affect the quality of work. To eliminate them, well-known tool makers use a balancing system designed to dampen these vibrations.

Dust protection

Not all angle grinders have reliable protection against dust, which determines their unsuitability for cutting stone, brick or plaster. When choosing a tool, it is necessary to clarify this point in case of the need to perform "dusty" work.

Some innovations from the manufacturer to protect the engine (video):

Cordless grinders

Battery tools are useful in two ways:

• in the absence of network connectivity;
• to eliminate the inconvenience of “transporting” the power cord tool (for example, during high-altitude work).

Full set of battery Devolt

Battery grinders are classified in the same way as network options. One more parameter is added to their parameters - time of continuous work from one set of batteries. And this is a huge minus - a short time of work from one battery. An increase in its capacity will lead to an unjustified increase in the mass and cost of the tool.

Therefore, it is necessary to choose the battery angle grinder in cases of urgent need or if there are a sufficient number of replaceable batteries.

Makita without "binding" to the network

An alternative to the use of a battery grinder may be the use of a diesel or gasoline portable electric generator of the appropriate power (significant starting currents of the grinder should be taken into account) for connecting a network power tool to it.

And grinders are named Panasonic

Pneumatic bolting

Pneumatic angle grinder is able to work for a long time without overheating in hard load conditions. They are most common in the metalworking industry, but can be used in the repair and construction and other areas of activity.

Bulgarian in the family of pneumatic tools

Its distinctive feature is the absence of an electrical power cable and the possibility of complete isolation from the compressor or air line. Such a tool can be safely used in conditions of high humidity. Pneumatic bolts are also distinguished by higher spindle speeds.

Gasoline cutters

The gasoline cutter is, of course, not Bulgarian and it is not intended for home use. But this professional tool allows you to perform some similar operations for the separation of solid materials, is capable of long-term autonomous work, has a sufficiently large capacity.

Benzorez - distant "relative" of LBM in a functional line

A few points of choice

All the parameters of the tool listed above may have helped you navigate the functional equipment of the Bulgarians, but did not bring clarity and specificity to the selection process. All Bulgarians are initially similar, and you will be able to evaluate the correctness of the choice only during the long-term operation of the tool. But, nevertheless, let's try to specify the selection algorithm:

• We determine the required disk diameter - 125 mm is best for the home.
• Based on the operation mode, we determine the power.
• We determine the need and availability of additional functions.
• We are looking for models, proven brands - in fact, everything matched to you is suitable, but ...
• We look at the convenience of their body and the location of the arms.
• We get acquainted with the conditions and duration of the guarantee.
• Choose!

Which Bulgarian is better: Makita, Bosch, Hitachi, Metabo or Devolt

To determine from the entire range, which is the best Bulgarian, definitely not. This choice is individual and each model of a quality tool has its own advantages and disadvantages. Considering the range of leading manufacturers Makit, Bosch, Hitachi, Metabo or Devolt, we can say that there is something to choose from.

A full mince will require a significant investment in the tool. Cost optimization is possible by selecting the optimal combination of functions in different models and rejecting those that are not so important for you in everyday use of the tool.

Popular Hitachi with its always thoughtful “elegant”, but comfortable appearance pleases the eye and creates additional comfort in work. 125-mm models have a rotational speed of up to 10,000 rpm with a power consumption of 650-800 W and a weight of up to 1.6 kg.

The Bulgarian for the 230-mm disk will already “take” 2000 W from the network, providing 6,600 rev / min of idling. Its weight is 4.3 kg.

Distinctive features of Hitachi in the example of this video:

Let's stop on 125 mm of Makita. Here, the power range of popular models is in the range of 710-1400 W with an instrument weight from 1.4 kg to 1.8 kg. They are designed for long-term intensive operation, have a significant power reserve, stabilization of the number of revolutions, a system for limiting inrush current and other useful innovations. “Heavyweight” on the 230th discs from Makita will provide 6,600 rpm with a power of 2.6 kW. The mass of such angle grinders - more than 5 kg.

About the advantages of Makma Makita (video):

In fact, all Metabo models are equipped with soft start systems, many of them “know how” to change the working disk without a key and smoothly adjust the speed.

A little about Metabo on a specific example:

Bosch is confused by the presence of a wide variety in the range of angle grinders. But you cannot go wrong by stopping the choice on this brand, you will simply be determined for a long time with the choice of a particular model.

To view a separate instance, watch the video:

American "yellow" Dewalt offers a number of reliable productive models without unnecessary "bells and whistles" that will satisfy the most demanding consumer.

Watch an introductory video about DeWALT small angle grinders:

Definitely say that it is better to buy a Bulgarian firm Makita, Bosch, Hitachi, Metabo or Devolt, we have no moral right. You will have to invest part of your time in the selection of the tool you need! To save your time, you can rely on the choice of a sales assistant from a trusted store, having familiarized him with the tasks planned for this Bulgarian.

And further…

Note! All angle grinders are a tool of increased mechanical danger and require careful handling with each other. Observance of precautionary measures during the work with the Bulgarian is your life and health. And the non-use of goggles or masks is a huge stupidity and frivolity, the price of which can be quite high.