The smallest angle grinder with adjustable speed

How to choose an angle grinder with adjustable speed

The enormous popularity of this tool is due to the wide range of possibilities that it presents. A large selection of accessories allows the use of an angle grinder for cutting, scraping and sanding as easily machinable materials, as well as hard and durable.

To date, the angle grinder offer hundreds of manufacturers, among which there are well-known throughout the world European brands, and little-known Asian manufacturers. The greatest demand among the domestic buyer are used:

• Optimal in terms of price/quality ratio Russian angle grinder.
• Japanese Makita angle grinders. light, comfortable and high quality.
• Bort angle grinder from China, which can boast a low price, a rich complete set and simple operation.
• German Bosch. more expensive option, but world-renowned for its power, reliability and convenience.

Types of grinders

Depending on the purpose there are 3 large groups of angle grinder:

• Household: as a rule, their power does not exceed 1100 watts, and the disc diameter is 125 mm. The main difference between these devices is that they can not work for a long time, because for home use it is not required. Every 15 minutes the angle grinder will have to give a break for 10 minutes, on average, it can work for about 20 hours a week;
• Semi-professional: these models are a kind of intermediate option. They are not yet suitable for use for a full working day, but they already have characteristics that almost reach the maximum performance. Their power ranges from 1500 to 2000 watts, and the maximum disc diameter can be even 230 mm. These angle grinder may well work 2-3 days a week;
• Professional: the models of this group are designed for those who have tied their lives to the repair and construction. The power of more than 2000 watts and the ability to install a disc diameter of up to 230 mm make them a real find: look out for these lathes can be people with golden hands, who like to beautify the house with their own hands on a permanent basis.

Main purpose of the tool

In the Soviet years the most popular scientific magazine was “Science and Life. The reason for that were the sections “Crossword with fragments” and “Little tricks”. The last rubric was filled with letters from readers willing to share their experiences of inventing non-standard solutions to everyday problems, among which a significant proportion were electricity issues.

In those years, there were no widely available electric cut-off machines, so no mention of angle grinders in “Little Tricks”. After all, already then existed industrial angle grinder, or “fortune”, working from compressed air, in the apartment or in the garage were not used. over, their constructive disadvantage in the form of a heavy pneumatic hose and the presence of a compressor with a receiver nullified the possibility of its use in everyday life.

But now the choice of cutting tools is widest, and its applications meet all the needs of modern builders. The main purposes of the angle grinder:

• Cutting of various parts or structures;
• Removal of material in the body of the product structure, grinding;
• Roughing off unprepared surfaces of parts and units before further work with them, including deburring after cutting;
• Surface grinding with special wheels, including blunting of sharp edges;
• tool sharpening (using diamond wheels, burrs, etc. п. ).

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Advantages and disadvantages

Of course, when choosing an angle grinder, both professionals and amateurs pay attention to the main characteristics, thanks to which you can determine the performance of this or that model. DeWALT offers its customers the highest performance in many respects (unlike other manufacturers)

First of all, each of the models can boast a high performance, which is important for long construction works. DeWALT angle grinders are able to work without interruption for a fairly long period of time, without heating and without losing their technical characteristics

Manufacturers took into account the fact that their products are used by a great many people of different professions, so the diameter of the power of the working part ranges from 115 to 230 millimeters.

Also, many models feature the ability to adjust the hood without using a special key. This is the most convenient option, because during construction work it is not always possible to do too many movements at once. In addition, many users note the correct location of the buttons in easy accessibility. Consequently, a huge plus of this brand bolt cutters is that they are practical in use. over, some models are equipped with a function of protection against intentional start, electronic speed control, self-switching brushes and many other features that greatly facilitate the work.

Engine power

In any model of angle grinder all technical characteristics are related to each other. Traditionally, the choice of tool begins with the power of the motor. It is this parameter that indicates what materials the angle grinder is able to cope with. the more power, the more dense the material it will cut.

Manufacturers produce models with different capacities, which range from 0.6 to 2.7 kW. However, they can all be conditionally divided into two types:

• Domestic. Motor power does not exceed 1.2-1.5 kW. powerful motors are mounted in solid, heavy housings that can withstand continuous use over a long period of time without overheating.
• Professional. Power angle grinder 1.5 kW and above is a sure sign of professional power tools. Such models consume more power, and it is harder to hold them in your hands.

It is worth noting that the greater the motor power, the greater the size and weight of the angle grinder. This relationship is easy to trace:

• with a power of 0.7-0.8 kW the weight of the unit is 1.5-2.0 kg;
• angle grinder with a power of 1.0-1.2 kW weighs 2.0-2.3 kg;
• angle grinder with a power of more than 1.5 kW will weigh at least 3.5 kg.

Professional angle grinders are easy to distinguish from household grinders by basic criteria:

• significant weight of the unit. this is due to the presence of additional structural nodes and a framework of increased strength;
• additional functions that simplify the work of the master with the power tool;
• the high cost, which is due to the use of wear-resistant components, capable of operating without overheating and breakage for a long period.

Interesting! Some manufacturers paint the power tool in different colors depending on the intended use. For example, the firm Bosch designates professional angle grinders, drills or screwdrivers in blue, and household units. in green.

All angle grinder are equipped with one or two handles, the number of which depends on the power of the device. Professional devices are usually equipped with two handles, with which you can hold a heavy machine in your hands for a long time during work.

Single-handed angle grinder. a light household models, the power of which does not exceed 1.5 kW. Their design provides for the possibility of screwing the handle to the body from one side or the other, depending on the individual characteristics of the master and the workplace. However, some models have the ability to screw the handle to a third position, convenient for grinding work. along the axis of rotation of the wheel. Although we can not say that the presence of this function is such an important factor when choosing an angle grinder.

Important! Professional builders advise choosing an angle grinder for domestic purposes with a motor power of 0.8-1.2 kW, for large-scale construction at the cottage or in the house. up to 1.5 kW. It is this kind of tool that will cope with the main tasks, without causing difficulties during work and without consuming a large amount of electricity.

For cutting a thin tube or metal angle power of 0.8-1.0 kW is enough, but for cutting concrete need an angle grinder with a motor 1.5-1.7 kW.

angle grinder. electric tool, which in professional language is called an angle grinder. Sometimes you can meet the abbreviation angle grinder on the boxes with the device, and in the world it is called “flex”. after the name of the first company that developed the device. Our name came from the name of the country of Bulgaria, where the first samples were brought back to the USSR. It is used for scraping, grinding and cutting stone, wood and metal products. “Komsomolskaya Pravda” tells about the best angle grinder for home, which can be found on sale in 2022.

Top 10 Rating by KP

Makita GA5030 (from 3,4 ths. rubles)

The device is in high demand, and you can find it on the shelves of most major construction stores and equipment centers. Japanese manufacturer, but production is in China. Sometimes there are models from Romania. Known for its mid-range tools. Largely due to the good price it managed to win the lion’s share of the market. This angle grinder is used for grinding and sanding surfaces, as well as cutting various parts and materials. Engine here is 720 W. not a record, but at home and when repairing the house will cut everything. There is a side handle, which is indispensable for precision work. Diameter of the body can be called compact. There is a spindle lock. at the touch of a button the mechanism stops and the disk can be replaced without disconnecting the device from the mains. The manufacturer has added a trigger lock, which means that there is no need to constantly squeeze it out during work. On the plus side, we can mention the system of protection of bearings, so as not to clog construction debris, double insulation of the housing. in favor of safety.

Characteristics:

Despite the rather democratic price of this angle grinder for home, it has a lever to adjust the speed of rotation. In 2022 manufacturers of more expensive models often save on this function, but the German company did not skimp on the additional mechanism. From competitors angular sander has a thin body. only 19 cm. In reviews, customers praise the unit for this feature. It weighs a little less than two kilograms, and in comparison with others it seems a fluff. Like other grinders of this class, it will work with wood, ceramics and metal. The main thing is to pick up a disk. On the plus side, we will highlight the spindle lock for quick tool change, comfortable grip and a hood to protect the operator. But sunglasses are better to wear. By the way, unlike the previous member of our top rating, here the hood is adjusted without a wrench. There are several vents on the housing, through which the heat is dissipated. Judging by the reviews, it is a necessary thing, but not quite perfected, because there are a lot of complaints about overheating during prolonged work. The claimed power of 900 watts is a good value.

It has got it’s own characteristics:

For some reason the manufacturers of the angle grinder liked the color of the sea wave, so in our rating again the device in this gamma. This time from another German tool manufacturer. The sample has all the qualities of a good grinder: quick disc change due to the locking mechanism, additional handle, which in addition can be located on the left and right. By the way it has an option of adding a notation tool, the so called scribe. But you have to buy it separately. The power button can be locked and you do not have to keep your finger on it. The mechanism integrates nodes that are responsible for the soft start. an important nuance for lawn mowers, which had not previously been presented in the mentioned samples. The electronic stuffing of this device in general praise: in case of abnormal situations in the work, it will simply turn off and then quietly resume work. Number of revolutions per minute is adjustable to fit different materials. The housing rotates by the wave of the fingers, without the need to use a screwdriver.

Features:

Let’s say right away that you don’t need the claimed power of 1100W, you can save 1000 and take a model of the same company by 200W less. It is almost identical, except for this parameter. The tool from the Russian company promises its owner a long life. Exactly how much. I could not find in the technical papers of this angle grinder. But among the user reviews no complaints about overheating were found. There is a turnover control and a smooth taste. Cool feature. the speed control under load. Those who have worked with the angle grinder at least a little, are familiar with the situation when during a long grinding of hard material the speed starts to drop. The device simply can’t cope. Theoretically there should be no such thing in this tool. Additional handle can be set in two positions. Hood rotates without a wrench. The manufacturer recommends using this product for cleaning of welding seams, abrasive metal cutting, when working with flap discs and scratchers (rust removal).

Features:

This is a pretty high quality and reliable tool, which is actually positioned not as a home tool, but with a serious claim to professional use. The engine power of 1.3 kW alone is worth it! The number of revolutions per minute, in comparison with other participants of the top, it has not added to the grinder. But it has a noticeable effect on the convenience of the work. Accepts bricks, rebar and concrete up to a cutting depth of 40 mm. When you take it in your hands you understand that engineers worked hard on this tool. Everything is neat, butt to butt, the plastic is strong. Handle is equipped with vibration protection. There is protection against overheating, which turns off the device at a critical temperature without consequences for the technique, as well as speed adjustment. Cable length of four meters. the dream of many home masters. It’s not uncommon for customers to have to make their own replacements. With this model you don’t need to take any more chances.

Features:

If you do not spare money, then you can consider buying this model, which, incidentally, is assembled in Russia. If we compare its characteristics with other participants in the rating of the best grinders, then nothing is outstanding. Same power, 900 Watt, adjustable handle position and RPM. But take a closer look at the nuances. First of all, the grip. without criticism. Works for a long time without overheating. No complaints about the rapid failure of the angle grinder have been found. People who have been in the construction business a long time can remember this tool from the earliest times. However, the motor in the 2021 models has been changed: the efficiency has increased, the winding has been improved. Redesigned protection system. Six speeds are available to the operator. On the first ones, you can go over the walls to remove paint or treat a part for rust. The last one is easy to cut fixtures. Local carbon brushes have a long service life. If you need the grinder only occasionally in everyday life, then you can forget about the replacement of this consumable at all.

Overview of popular models

As an example, let’s consider several popular models of cordless angle grinders with adjustable rotation speed of the wheel.

Note! This list is provided as an introduction. Do not use it as a kind of rating.

Bort BWS-18Li-125

Cordless angle grinder compatible with 125 mm diameter discs. It has a two-position rubberized handle, brushless motor, automatic wheel speed regulation and stabilization system. Equipped with effective overload protection and reliable fixation of clamping spindle. The advantages of the model Bort BWS-18Li-125 include such features:

• 18 V lithium-ion battery (2 pcs. complete).
• Additional two position handle with rubberized inlays.
• Compact pouch for transport and storage of the tool.
• Metal protective shroud.
• Low weight (1.7 kg. (2 pcs in loaded state).
• Mechanical spindle speed switch allows to work with 4 000 and 8 000 rpm.

Useful at! Manufacturer of cordless angle grinders with manual speed adjustment, claims a 5 year tool life.

Elitech MSHU 18BL

Compact angle grinder with 18V lithium-ion battery and brushless motor. The higher rotation speed is inherent in the model compared to its corded counterparts, which has a positive effect on its performance. Comfortable, ergonomic handle with rubberized inlays. Low weight (2.3 kg).) Allows you to work without stopping for a long time. Of the additional features of the angle grinder should be noted such:

• Protective metal cover.
• LED illumination of the working space.
• Automatic spindle speed adjustment (0-8,500 rpm).).
• Plastic case for convenient and safe transportation.
• Reliable battery.
• Optional two-position handle.

Important! In most cases, the Elitech MSHU 18BL angle grinder is sold without battery and charger, which are sold separately.

Makita DGA517Z

) Compact angle grinder with a 125 mm wheel diameter. Handle with two positions for comfortable grip while working. Automatic torque adjustment with electronic checkback protection. Power supply via 18 V lithium battery. Other features of the device are:

• Brushless motor resistant to dust and fluids, with high performance and long service life.
• Comfortable handling due to comfortable weight distribution and rubber coated grips.
• Automatic wheel stop on kickback or clamping.
• Soft start with less jerky starting behavior.

Important! Can be used with optional batteries by adding an adapter.

Makita DGA504Z

This model is also used with 125 mm disc. Has a spindle lock for quick and easy grinding wheel changes. Equipped with additional handle that can be set in 2 positions. Automated torque control. Other advantages of the angle grinder include:

• A protective cover that protects the operator from dust and sparks.
• Soft start option, which reduces the chance of tool falling out of the hands when starting.
• 18 V lithium-ion battery.
• Re-start protection indicator.

Useful at! Spindle speed control system allows the tool to be used from 0 to 8,500 rpm.

Fein CCG18-125BLPD 71200461000

Model with brushless power unit, quick-clamping nut for changing the 125th disc and LED illumination. Capable of working at spindle speeds between 2,500 and 8,500 rpm. The model’s advantages include:

• Protective hood.
• Special housing vent design.
• Anti-vibration two position handle.
• Anti-slip rubber coated housing.

Bosch AdvancedGrind 18 06033D9000

Compact cordless angle grinder with 125 mm disc. Powered by a universal 18 V lithium-ion battery, which can be used with any Power for ALL tool. Model benefits include:

• Two-position handle.
• Automatic spindle speed adjustment (2,800-10,000 rpm).).
• Protective cover.
• Soft start system.
• Quick-clamping nut for replacing the disc.

Important! The angle grinder is sold in most stores without an enclosed battery.

Technical features

The speed regulator on the angle grinder is in the form of a switch, which is operated with the grinding wheel at a standstill. The trigger principle (as on drills or electric screwdrivers) is not possible here due to a number of reasons. This is primarily related to the safety of the tool.

Correct operation of the angle grinder requires a firm grip, which is possible only with a firm grip of the hand. Manipulation with the speed switch is not permitted due to the high risk of injury.

The angle grinder works on the principle of voltage supply at the moment the start button is pressed. In an angle grinder without a regulator, the rotor and stator receive excessive current at this point, which sharply increases the starting voltage on the coils. Although manufacturers provide for use in such modes, sudden power surges have a negative effect on the state of contacts and mechanical parts of the motor drive. The result of such exploitation will be the intertwist circuit, the onset of which depends on the quality of assembly and the quality of components.

Useful at! cordless angle grinders with disc speed control have a high level of reliability due to the reduced loads on electrical and mechanical components of the tool.

The sudden transition from off to high RPM has a negative effect on the gearbox, forcing it to function in overload modes. This can be understood from the fact that when you turn on an ordinary angle grinder “tends” to jump out of your hands.

Angle grinder with a lithium-ion battery in practice shows greater convenience and functionality than wired analogues. Due to its technical features, it belongs to the multidirectional tool and can be used for cutting, grinding and stripping metal, stone, wood. The absence of wire makes the angle grinder mobile and allows you to perform construction or repair work in places where there is no possibility to connect electricity or pulling cable is difficult for some reason: on scaffolding, roofs, in the woods, in the cottage.

Technical features

The speed regulator on the angle grinder is made in the form of a switch, which is controlled with the wheel stopped. The trigger principle (as on drills or electric screwdrivers) is not possible here due to a number of reasons. First of all, it is connected with the safety of work with the tool.

Correct operation of the angle grinder requires a firm grip in the hand, which can only be achieved by firmly grasping the handle with the palm of your hand. Manipulation with the switching of speed modes is not allowed because of the high probability of injury.

angle grinders work on the principle of voltage supply at the moment the start button is pressed. In the angle grinder without a regulator at this point, the rotor and stator receive excessive current, which sharply increases the starting voltage on the coils. Although manufacturers provide for use in such modes, sudden voltage spikes adversely affect the state of contacts and mechanical parts of the motor drive. The result of such operation is an inter-turn short circuit, the onset of which depends on the quality of assembly and the quality of components.

Useful! Cordless angle grinder with disc speed control have high reliability due to the reduced loads on electrical elements and mechanical parts of the tool.

The sudden transition from off to high RPM has a negative effect on the gearbox, forcing it to operate in overload modes. This can be understood from the fact that when you turn on an ordinary angle grinder “tends” to jump out of his hands.

Angle grinder with a lithium-ion battery in practice shows greater convenience and functionality than corded analogues. Due to its technical features, it refers to the multidirectional tool and can be used for cutting, grinding and scraping metal, stone, wood. The absence of wire makes the angle grinder mobile and allows you to perform construction or repair work in areas where there is no possibility to connect electricity, or pulling cable is difficult for some reason: on scaffolding, roofs, in the woods, in the cottage.

Which angle grinder to choose

When buying an angle grinder, you need to look at the following parameters:

An indispensable device in the home is a grinder. It is characterised by its compact size and is very easy to work with. It will take only 15 minutes for a person who has never worked with an angle grinder, to fully master the principle of working with it.

If you need to buy a household angle grinder, then you should consider the fact that it is not intended for daily and long-term use. Technical indicators of such devices are much lower than those of a professional machine, which can be used for a very long time, and it will not overheat. And professional angle grinders are also equipped with special brass inserts, as well as a metal housing.

This is necessary in order to apply the angle grinder in extreme conditions, such as:

For such works it is necessary to buy a tool that will be as much as possible protected from moisture and dust. That is why in no case can you apply an ordinary household angle grinder in such works, because they will very soon break down.

Universal grinders

As a universal device is considered such an angle grinder, which has an adjustable speed. Such a machine is ideal for various jobs such as sanding, cutting or polishing material. The power tool, which has a speed control, usually has also a soft start, so it can be used in cases where you need to carefully perform polishing of wooden or stone surfaces.

This is due to the peculiarities of the structure of materials, because the processing of such surfaces can not be done at high speeds, because it can lead to chipping and unevenness, and very quickly wear out the nozzles. That is why a professional angle grinder will be ideal for such a task.

How to choose an angle grinder for the home?

When considering the purchase of a grinder, it is recommended, first of all, to pay attention to the following parameters:

• power. The amount of work performed and productivity depend on it;
• Possibility to regulate the rotation speed, so that you can choose the best disc speed for each type of work;
• the length of the power cable;
• setting the handle in different positions (two, three) so that it is more convenient to grind or cut the material;
• availability of the cover, protecting the user from splinters, dust, sparks;
• the ability to change accessories without the use of keys;
• availability of additional functions, such as locking accidental pressing of the tool button, anti-vibration system, protection against jamming of disks.

How to work properly?

When working with the angle grinder must be sure to follow the safety precautions, because this tool is quite dangerous. The main rules for using the grinder are:

• Hold the tool firmly so it does not fall out of your hands or bounce off the material being sanded;
• Install only those sharpening wheels for which the diameter of the angle grinder is designed;
• Make sure that the mains cable does not get under the rotating disc;
• Stand on your feet as steadily as possible to avoid losing your balance;
• Only switch the grinder on when you are completely ready to use it;
• perform replacement of nozzles only at switched off and unplugged angle grinder;
• be sure to turn off the unit after performing certain work, do not move around the room, the room with the included tool;
• after turning off the angle grinder, include a lock for accidental pressing of the “start” button, if the model provides such a function.

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