Mini grinder: the possibilities of a small angle grinder

Angle grinder (grinder) AEG 451403 WS 8-115. Photo 220Volt

There are many models of grinders with different technical characteristics . One of the determining factors for the purpose of a power tool is the diameter of the working disk. This parameter is the basis for classifying grinders according to weight and dimensions. One of the groups represents standard sizes related to small angle grinders. Information about this group is in this article.

What is the name of

Actually, the technically correct name for an angle grinder is an angle grinder . Angular because the axis of the working spindle is at right angles to the axis of rotation of the electric motor.

Angle grinder (grinder) EINHELL TE-AG 125 CE. Photo 220Volt

“Bulgarian” is the most common colloquial name for an angle grinder. It came into circulation during the existence of the USSR with the advent of the first samples produced in Bulgaria (hence the name “Bulgarian”). The grinder also has other informal names such as:

• “Fortuna” - after the name of the first models of Bulgarian manufacturers;
• “Turbine” - similar to the sound when working with a functioning aircraft turbine;
• “Flexi” is a common alternative to the name grinder in Europe, derived from the name “Flex” of the first European models, which served as the prototype of an angle grinder.

Micro, mini and small: disk size/diameter, power, how many watts and other characteristics

BOSCH GWS 12-76 V-EC cordless angle grinder (grinder). Photo 220Volt

In practice, manufacturers and trading companies unofficially use the classification of grinders according to the size of the attachments used in their work. Classic angle grinders are divided into small, medium and large. The closest thing to small angle grinders in terms of technical parameters are micro and mini power tools, which have the following values.

• Micro. The disc size of this power tool does not exceed 50 mm. Most often used in precision jewelry and dental practice. The power of a micro angle grinder does not exceed 500 W. In design, most modifications are made without a reduction gear, which distinguishes micro angle grinders with increased working spindle speeds (50 thousand rpm - 70 thousand rpm).
• Mini. These angle grinders are functionally practically no different from the classic versions, the only difference is the compactness of the design. The power of mini-angle grinders is from 0.5 kW to 0.8 kW, the spindle speed reaches 20,000 rpm.
• Small ones. The diameter of the cutting disc on such angle grinders is 115 and 125 mm. Of all the classic versions, grinders have the maximum rotation speed of the working disk - about 12,000 rpm. The optimal power for performing work with small angle grinders ranges from 0.8 kW to 1.3 kW.

Why you can’t install a large disk 150 mm or more

Theoretically, on a small grinder designed to work with a maximum size disc, for example, 125 mm. You can remove the protective cover and install a disk with a diameter of 150 mm. Actually, this very action is already a gross violation of safety regulations , leaving parts of the human body unprotected from sparks and fragments.

Important: there are restrictions on the linear speed of the disk; it should not exceed 80 m/s. A disk with a diameter of 150 mm or more, placed on an angle grinder with a maximum allowable size of 125 mm for safe operation, will have a linear speed of more than 80 m/s, which will entail a sharp increase in vibration and destruction of the attachment.

Disk turnover rate

The spindle with the disk mounted on it rotates at a given speed, making a certain number of revolutions per unit of time. In existing models of angle grinders, this parameter can vary within 2800-11000 rpm. The size of the disc determines the required speed limit - for larger circles a smaller number of revolutions is required.

For small diameter discs up to 125 mm, the highest speed parameter is set to 10-11 thousand rpm. For circles with a diameter of 180 mm, the speed limit is 8.5 thousand per minute, and for maximum discs of 230 mm - no more than 6.65 thousand revolutions. If this parameter is not observed, the disc may break off and cause injury to the operator.

The marking of an angle grinder indicates the maximum size of the disc that can be used, for example, a model with a limit of 150 mm can accommodate circles of 115-150 mm. Therefore, it is recommended to buy more universal angle grinders with a speed controller.

Purpose: on wood, metal and more

Small grinders with a circle of 115 mm. due to the small working surface of the cutting wheel (about 25 mm) and its wear during operation, they are ineffective for cutting workpieces. To a greater extent, such grinders enjoy priority when performing grinding work. Depending on the type of attachments, they can be used to grind a wide range of different materials (metal, glass, wood, porcelain and others).

Angle grinder (grinder) VORTEX USHM-125/900. Photo 220Volt

Angle grinder with a 125 mm wheel. solve a much wider range of problems. Possibility of cutting workpieces with a thickness of about 35 mm. make them indispensable for performing work in domestic conditions. The retail chain has a wide variety of attachments of this size, thereby increasing the number of tasks in relation to various materials that can be solved by a small angle grinder with a 125 mm circle.

Mini and micro grinders

By and large, a manual cutting machine has no right to be called a mini-grinder. So, to work with it, one strong male hand is required to cover the full circumference of the body. In some cases, you will need the help of a second hand. But the name stuck. For domestic needs, electrical machines are used, and in some places, pneumatic machines. Based on their functionality, they are divided into micro- and mini-grinders.

The micro angle grinder is held in the hand similar to a ballpoint pen. The cutting or grinding disc has a diameter of no more than five centimeters. These tools have found their application, for example, among dentists and jewelers. Read about the features of the wood grinding disc here.

Mini-grinders have received a wide range of applications due to their capabilities. Average power, convenient disk sizes, and adjustable handles allow you to use them when cutting sheet metal and rolled products of various shapes up to 8 mm thick, cutting down trees or branches, processing pressed wood or fiber panels, and cleaning cut corners. And this is not the full range of capabilities of this practical tool. With certain skills, shaped cutting and artistic processing of metal or other material surfaces is possible.

Advantages, reviews

The main advantages of small grinders are as follows:

• Light weight allows a small angle grinder to perform any work without strain: at heights, holding the angle grinder suspended with one hand, being in an awkward position, performing other similar actions.
• Compactness in size helps to carry out work in hard-to-reach places where it is impossible to carry out work with angle grinders of medium and large dimensions.
• It will not be difficult for the user to make an accurate cut or create the most effective pressure during grinding

Angle grinder (grinder) Kolner KAG 125/1000 V. Photo 220Volt

There are a lot of reviews on the Internet from users of small grinders. They highlight the above advantages . Among the models that deserve good reviews are those in which the small size of the wheel interacts with the increased power of the electric motor of a small angle grinder.

Battery and other types of manual angle grinders

Depending on the power source, the following types of manual angle grinders are distinguished.

• Electric, the most productive of all types. The disadvantage is the mandatory presence of an electrical network.
• Rechargeable , have an autonomous power source, which increases the possibilities of their use; there is no need for the presence of an electrical network. Battery life increases with the use of brushless (instead of brushed) electric motors, which consume less energy.

Cordless angle grinder Metabo W18 LTX 125 + 3.5 Ah LiHD + charger ASC 55 T0333. Photo VseInstruments.ru

• Small pneumatic angle grinders are used for performing minor repair and installation work in the field, where there is only a mobile compressor.

With speed control, soft start and other functions

Equipping small grinders with additional functionality increases the range of work performed by the same power tool.

Small grinders have high spindle speeds with a working tool. mechanisms with a speed controller on them . In this option, it will be possible to perform high-quality grinding work, cut off low-melting materials, for example, plastic, which are produced at lower speeds, set using the rotation speed controller.

To a lesser extent, small angle grinders require a “soft start” installation , which is effective for high-power angle grinders.

Bulgarian Interskol 125/700. Photo 220Volt

There are many additional options that make working with an angle grinder easier (restart blocking, automatic balancing, protection against overload and dust formation inside the angle grinder body, as well as many others). Providing additional options should not become an end in itself. This leads to an increase in the cost of power tools. You should select only those that are necessary for specific operating conditions.

The main features of small grinders

A small grinder has its own characteristics that make it an indispensable tool in solving a number of construction and repair problems:

1. Has light weight. This feature allows you to work on weight for a long time without getting tired.
2. It has compact dimensions, which allows the device to work in places where it is difficult to reach with more bulky equipment.
3. You can work without using an additional handle: thanks to the small diameter of the body, the small grinder can be grasped with just one hand and cleaned the surface. This is very convenient if you have to hold on with one hand and work with the other.
4. There are battery-type devices, which gives even more freedom in using the tool.
5. Small grinders have little power. This eliminates the possibility of strong vibration during operation and makes it possible to carry out more precise processing.

Popular brands

Manufacturers well-known on the power tool market produce almost any standard size of grinders. Below are examples of some models of small grinders from popular brands among users.

BOSCH GWS 18-125 V-LI

powered model . On one charge it provides maximum cutting performance among other grinders with similar parameters. The special 4-pole design of the electric motor ensures its reliability and long service life. Lightweight, weighing about 2.3 kg, ensures comfortable work with the tool in an overhead position.

Cordless angle grinder Bosch GWS 18-125 V-LI 0.601.93A.30B. Photo VseInstruments.ru

Metabo WEV 10-125 Quick

The power of the model best matches the loads experienced by 125 mm. work tool. Equipped with speed control with stabilization function under variable load. The design includes a quick-release nut for changing attachments .

Angle grinder (grinder) METABO WEV 10-125 Quick 600388000 (in box). Photo 220Volt

AEG WS 13-125 XE

A powerful and at the same time compact model weighing about 2.4 kg. Can be used with one hand. Equipped with a soft start system and speed control from 2800 rpm to 11500 rpm. The absence of vibration during operation, the presence of a quick-release nut, and the simple design of fixing the protective housing (lever system) are additional advantages of this model.

Angle grinder AEG WS13-125XE. Photo VseInstruments.ru

DeWALT DCG414N

Model with battery power supply. According to user reviews, it is distinguished by the power required for operation and reliability. The convenient location of the power button provides additional comfort during operation.

Hitachi G12SR4

The power of the 730 W model is sufficient to work in a 115 mm circle. Equipped with a high-quality dust protection system.

Sparky M850E HD

Small grinder with speed control (3000 rpm - 10000 rpm). a magnesium alloy gearbox in the design of the gearbox reduces the weight of the grinder to 1.7 kg. To increase operating comfort, the package includes an anti-vibration handle.

Angle grinder Sparky M 850E HD. Photo VseInstruments.ru

Bison USHM-115-800 M3

An inexpensive small model (circle diameter 115 mm), light weight (2.4 kg) made in China from a Russian company.

Whirlwind angle grinder 115/650

Despite the low power of the model (650 W), it is quite useful for household and garage work.

Makita 9562 CVH

The 1.2 kW model cuts almost any material with a thickness corresponding to a 125 mm circle. during operation . The model has excellent protection from dirt and dust - you can effectively operate this angle grinder in dusty conditions.

Angle grinder (grinder) MAKITA 9562 CVH. Photo 220Volt

HAMMER USM 1200E

A universal-use model with variable speed control and high power (1200 W) ensuring stable operation of a circle with a diameter of 125 mm.

Interskol angle grinder 125/750

One of the lightest models of small grinders weighing only 1.75 kg. Used when working in hard-to-reach places, it is possible to work confidently with one hand.

Rating 2022

BISON USHM-230-2100 PM3

Bought for my father-in-law as a birthday present. In the summer it came in handy when building a bathhouse and updating the facade of the house. The model is very powerful, it cuts metal, brick and blocks. And most importantly, a good price in relation to analogues on the market and a 5-year warranty.

• Doesn't overheat
• High quality build
• Smooth start
• Rotary handle
• Good power
• Handles the load well

• Angle Grinder
• power 2100 W
• disk rotation speed up to 6000 rpm
• disc diameter up to 230 mm

Bort BWS-950

Excellent Bulgarian. Lightweight, fits comfortably in the hand. The power is good for such a disc diameter. I cut plastic, metal, wood, everything with ease! The other day I was laying paving slabs; at times I had to cut something, but I did it quickly!

• Light weight
• Fits comfortably in the hand
• Powerful enough
• Good equipment

• Angle Grinder
• power 900 W
• disk rotation speed up to 12000 rpm
• Modification 98296389
• disc diameter up to 125 mm
• weight: 1.8 kg

BISON USHM-125-950 M3

She completed her task 100%! I sawed through an old meth barrel 4mm thick with virtually no load. Just right for a dacha. This is not the first device from this manufacturer that I have in stock. Satisfied.

• Fits comfortably in the hand
• Powerful enough
• Appearance
• Reliable

• Angle Grinder
• power 950 W
• disk rotation speed up to 11000 rpm
• disc diameter up to 125 mm
• weight: 2.4 kg

Hammer USM 850 B PREMIUM

It's a peppy machine and does a pretty good job for the money. And it’s convenient to cut and grind, there are no problems with pipes or fittings. It’s comfortable to work for a long time, it doesn’t heat up much, the button is comfortable and generally grippy.

• Good build
• Soft cord
• Comfortable handles
• Powerful enough
• Doesn't heat up

• Angle Grinder
• power 850 W
• disk rotation speed up to 11000 rpm
• disc diameter up to 125 mm
• weight: 1.7 kg

Hammer USM 2350A

I’ve been using it for six months now and have had no problems. The angle grinder is strong and built with high quality; I haven’t been able to find any defects in all this time. It cuts smoothly and quickly, and there is nothing more to ask from it. Great tool, I recommend it.

• Powerful and reliable
• Rotary handle
• Smooth start
• Withstands long-term loads well
• Light weight
• Good build
• Relatively quiet

• Angle Grinder
• power 2350 W
• disk rotation speed up to 6000 rpm
• Modification 28447
• disc diameter up to 230 mm
• weight: 6 kg

Makita GA5030

Operating since 2009. I changed the set of brushes twice, replaced all the bearings a year ago, I don’t consider this a drawback. I bought a second one as a spare, I had several objects so as not to burden me. The first has a convenient design for turning on the button, the second is somehow not so good, you have to press the button before moving it forward. In all my time I have never seen a more convenient grinder

• Lightweight
• Fits well in the hand
• Virtually no vibration
• Long wire
• Relatively quiet

• Angle Grinder
• power 720 W
• disk rotation speed up to 11000 rpm
• disc diameter up to 125 mm
• weight: 1.4 kg

Read also: DIY crafts for your home workshop

Interskol UShM-150/1300

Of course, there is no suitcase, but I won’t find fault with a good grinder for such little money. The fact that there is no PP doesn’t bother me, there’s no jerk. It is comfortable to hold in your hands. For three weeks I worked with it in all directions: cutting, cleaning, polishing. Indeed, it can be used for a long time - I have not observed any overheating or failures.

• Fits comfortably in the hand
• Lightweight
• Spindle lock
• High quality build

• Angle Grinder
• power 1300 W
• disk rotation speed up to 8500 rpm
• Modification 58.1.0.00
• disc diameter up to 150 mm
• weight: 2.5 kg

AEG WS 13-125 XE

A good unit for professionals! I really liked the keyless nut, it saves a lot of time, even if the disc gets stuck! The side handle is anti-vibration and lies comfortably in the hand. The power cable, no matter how hard I twisted it, didn’t even break!

• Quiet operation
• Powerful
• Fits comfortably in the hand
• Smooth start
• Speed ​​support under load
• Keyless nut
• Long cord

• Gets hot at low speeds

• Angle Grinder
• power 1300 W
• disk rotation speed up to 11000 rpm
• disc diameter up to 125 mm
• weight: 2.4 kg

Bort BWS-905-R

Overall, it’s a good machine for home use or for a craftsman, if you don’t overload it with very hard work. I took it to work on siding and similar materials - it turns out to work with one hand, which greatly speeds up the process. The power, in principle, allows you to work on metal; when dismantling, they cut down old railings with it, but you have to be careful not to overheat. In general, it’s a good budget device for household purposes and semi-professional use.

• Solid body
• Power
• Fits comfortably in the hand
• Speed ​​adjustment
• Replacing brushes without disassembling the housing

• Angle Grinder
• power 900 W
• disk rotation speed up to 11000 rpm
• Modification 98290004
• disc diameter up to 125 mm
• weight: 1.8 kg

Bort BWS-1000-R

I liked everything in general, the assembly, the packaging, and most importantly, the quality and stability of operation. For the price, I think this is a very good option. It is comfortable to hold, the additional handle is conveniently attached and is well fixed in a comfortable position.

• Convenient speed adjustment
• Gripper handle
• Quick-release casing on eccentric
• Soft wire
• Lightweight
• Build quality

• Angle Grinder
• power 900 W
• disk rotation speed up to 11000 rpm
• Modification 98296631
• disc diameter up to 125 mm

BISON USHM-125-1100 TM3

Now I don’t see the point in buying more expensive models for household use. This Bulgarian can do a lot. I used it primarily for cutting and polishing porcelain tiles - it did an excellent job. I cut and polished metal poles with it. I made a cut along the lining. In general, for those who doubt whether the power and diameter of the disk are enough, this will definitely be enough.

• Powerful enough
• Speed ​​adjustment
• Ergonomics
• Build quality
• Smooth start
• Performance

• Angle Grinder
• power 1100 W
• disk rotation speed up to 11000 rpm
• disc diameter up to 125 mm
• weight: 2.5 kg

VORTEX USHM-125/1100

I took it for my first experience in laying a stove at my dacha. I specifically chose it for the 125th wheel so that I could cut the brick with a diamond blade with minimal adjustments. She did an excellent job. After all the work with the brick, I disassembled the case and blew out the dust. I decided to try to sand the new frame at the same time - it did a great job, although here I had to open the frame and blow it out much more often.

• Compact
• Fits comfortably in the hand
• Long cord
• Revolving
• No vibration

• Angle Grinder
• power 1100 W
• disk rotation speed up to 11000 rpm
• disc diameter up to 125 mm

RYOBI R18AG-0

A very convenient thing! There are simply no wireless alternatives for that kind of money. It doesn't make much noise and stops quickly. Someone writes that it gets hot - I didn’t notice it, maybe at large volumes yes, but then it’s easier to unwind the extension cord and turn on the wired angle grinder. And if you don’t cut a lot, for example beacons, then it’s very convenient

• Comfortable grip
• Powerful enough
• Not noisy
• Build quality
• Rechargeable

• Angle Grinder
• battery operation
• disk rotation speed up to 6500 rpm
• disc diameter up to 115 mm
• weight: 2.2 kg

Interskol UShM-125/750

Powerful, comfortable, small. I work easily with one hand. I work calmly on weight. We hired the main grinder to help us, so we could have something to do while we were cutting the balcony. It is necessary to cut the fittings, the corner, clean the weld, cut off anything sticking out of the wall. Not to mention PVC, acrylic, plastic. But it turns out that the whole team is waiting for her, because it’s really convenient to work. The larger one was left only for concrete.

• Power button with protection
• Lightweight
• Convenient one-handed operation
• Powerful enough

• The wire is harsh and short

• Angle Grinder
• power 750 W
• disc diameter up to 125 mm

VORTEX USHM-230/2300

It will give a head start in terms of build quality to more expensive analogues, I cut and clean 3 mm metal with this tool, the build quality is excellent - I recommend it, even for professional use.

• Reliability
• Power
• The handle turns comfortably
• Rubberized body
• No sagging under load
• Smooth start
• Quick access to brushes

Edgers and grinders (grinders) are widely used in production and at home to perform operations of varying complexity. This can be cutting, grinding, and polishing materials of a certain class. When choosing a suitable tool, they are guided by the rating of grinders.

Read also: Oblique chisels for wood

How to choose for home and other purposes

Angle grinder AEG 451410 WS13-125XE in operation. Photo 220Volt

The main approach when choosing an angle grinder is that it is selected for specific types of work. The scope of application depends on the following characteristics of the angle grinder.

• First of all, when choosing, you should pay attention to the maximum size of the cutting tool working in tandem with the grinder. If its use is limited to cutting profiles, sheet metal, kitchen ceramic tiles, cleaning rusty surfaces and solving other household and garage problems, then a small grinder will be the best option. To cut thick-walled pipes, channels, beams, concrete structures and other similar work, you should use a grinder of medium and large categories.
• Power. This parameter is directly related to the size of the nozzle. When performing complex long-term work, professional grinders with a large circle size and high power are used. For working in hard-to-reach places, lightweight compact small angle grinders with low power ratings are suitable.
• When choosing cordless angle grinders, the main criterion will be the battery capacity. The higher the capacity, the longer the operating time before recharging. For short-term work, it is enough to use small cordless angle grinders with small batteries and minimal capacity.
• The use of pneumatic angle grinders is associated with the speed of supply of compressed air and, accordingly, with the power of the compressor. For small grinders, an air pressure of about 6 atm and a flow rate of about 100 l/min are sufficient for operation. Large pneumatic machines are effective at delivering up to 540 l/min.

The main purpose of the tool

During the Soviet years, the most popular scientific journal was Science and Life. The reason for this was the sections “Crossword with fragments” and “Little tricks”. The last section was filled with letters from readers who were ready to share their experience of inventing in non-standard solutions to everyday problems, among which electricity issues occupied a significant share.

In those years, electric cutting machines were not widely sold, and therefore no mention of grinders can be found in “Little Tricks”. After all, the industrial grinders, or “fortunes,” that already existed then, powered by compressed air, were not used in an apartment or garage. In addition, their design flaw in the form of a heavy pneumatic hose and the presence of a compressor with a receiver nullified the possibility of using it in everyday life.

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

• trimming various parts or structures;
• removal of part of the material in the body of the product structure, gating;
• stripping unprepared surfaces of parts and assemblies before further work with them, including deburring after cutting;
• surface grinding using special wheels, including dulling of sharp edges;
• tool sharpening (using diamond wheels, cutters, etc.).

Rating of top models with battery and more, characteristics

There is information on the Internet that, from a huge range of various modifications of grinders, based on expert opinions, contains data on the best, in their opinion, models. It is quite subjective, but you can use it as a starting point when choosing an angle grinder for purchase. According to experts at the TechnoPro store, the following are worth attention among small Bulgarians in 2022.

BOSCH GWS 18-125 S. Power 900 W, circle diameter 125 mm. Weight 1.8 kg, lightweight, can be held with one hand. Low noise level during operation, vibration is practically not felt. The spindle speed is 11,000 rpm, adjustable for high-quality grinding work. It is well suited not only for home work, but also with the appropriate equipment, for example, with a wall chaser attachment, for professionals.

Angle grinder (grinder) BISON UShM-125-950 M3. Photo 220Volt

BISON USHM-125-950 MZ. Unlike the BOSCH model, it has an inexpensive price and a fairly high power of 950 W for the category of small angle grinders. Increased requirements for dust protection guarantee high reliability during operation. Rotation speed 11000 rpm.

Which is better, good options to choose from

Each of the angle grinder models is designed to perform a specific type of work. This is where the classification of angle grinders comes from: household, semi-professional, professional. Therefore, the concept of “the best grinder” is not global. According to a user survey, the following were recognized as the best small angle grinders with a 125 mm circle in 2022:

• BOSCH GWS 9-125 S;
• Metabo WEV 850-125;
• Makita 9565HZ;
• DeWALT DWE4119.

Angle grinder (grinder) BOSCH GWS 9-125 S. Photo 220Volt

Rating of the best household grinders

The best grinders are considered in relation to the most popular diameters of the disc blades (125, 150, 180 and 230 mm). Let's look at each of these groups in more detail.

With 125 mm disc

Among the best 125 mm angle grinders, the Metabo WEV 10-125 model worth 7,976 rubles, which is distinguished by its increased power rating, is considered good. Built-in electronics provide speed control and a number of other functions. The safety of the operating mode is ensured through the use of a special automatic clutch, as well as a special device for brushes that turn off when the power is lost.

Metabo WEV 10-125

If you need a powerful but fairly compact tool, the AEG WS 13-125 XE model, costing 6,429 rubles, will help solve all your problems. With a stated weight of 2.4 kg, this type of grinder can be operated with one hand. The electric motor of the machine is controlled by a built-in electronic unit that regulates all operating modes. The tool has excellent ergonomics and an anti-vibration handle. At the same time, it has no visible shortcomings.

Read also: Drawing of a waste paper press

The next most popular model, the DeWALT DWE4215, is characterized by increased power (1200 W) and a well-designed cooling system. It costs 6,728 rubles, and the product’s engine has an overload protection system. Weighing 2.2 kg, the tool is easy to handle. Its main advantage is reliable protection from dust.

Makita GA5030, costing 3,980 rubles, is a lightweight and easy-to-use machine in the mid-price category; at the same time, it is very light (weight in running order – no more than 1.8 kg). Together with high quality, this makes it one of the most attractive models.

At 150 mm

In this group, the universal model Metabo WEF 15-150 with a low-speed gearbox and a system for maintaining shaft speed stands out. The built-in electronic filling ensures a smooth shutdown of the engine in the event of a blockage of the circle and protects it from being turned on again.

At a cost of 21,299 rubles, the angle grinder has excellent ergonomics, a comfortable grip and an adjustable side handle. The holder is equipped with an anti-vibrator and can be easily rearranged if necessary.

Behind its modest appearance and low cost (9561 rubles) Makita 9566C hides high-quality filling, including:

• 1.4 kW motor.
• Smooth start and speed maintenance device.
• Built-in protection against possible overloads.

The circle is fixed using a standard nut, and to adjust the position of the casing you will need a regular screwdriver.

The Bosch GWS 15-150 professional-grade grinder costs 15,106 rubles and is suitable for working in difficult conditions. The presence of a comfortable handle allows you to hold the tool weighted for a long time. The speed control device protects the cutting disc from destruction, and the clutch, designed to lock the spindle, automatically turns off the motor.

Bosch GWS 15-150

At 180 mm

The Metabo WEPBA 19-180 product with a power of 1.9 kW easily cuts any metal and cleans welds. Its weight is relatively small (2.9 kg) and allows the machine to be used for a long time. The cost of the product is 16,150 rubles.

When using discs of the specified size, even more attention is paid to anti-vibration protection. Therefore, this model is equipped with a vibration-protected handle and a special auto-balancing system that eliminates imbalance of the working wheel.

The Makita GA7040SF01 model, designed for the same disk size, is simpler in its functionality, but its motor power is sufficient for heavy loads. In addition, it provides a smooth start and dampening of excessive vibrations on the side handle. The cost of the machine is 11,839 rubles

At 230 mm

Designed for a 230 mm disc, the Bosch GWS 26-230 is a professional tool worth the investment. The powerful engine has a smooth start and the ability to maintain speed in load mode. Security measures include:

• presence of a release clutch;
• protection against accidental start-up and overheating;
• well protected handle.

Comfortable handling of this model is also ensured by a securely fixed “Start” button. The price of the product is 20,000 rubles.

The Makita GA9020SF angle grinder is capable of withstanding significant loads typical for working with large discs. For this purpose, the engine gearbox is equipped with bevel gears and special protection against overheating of all components. For a powerful motor, a smooth start is important, eliminating shaft jerk. The price of the grinder is 8070 rubles

Do it yourself

A small grinder with 115 or 125 mm circles. can be made from an ordinary hand drill . It should immediately be noted that the disadvantages of the homemade product are the low rotation speed of the wheel, which impairs the productivity and quality of the cut. However, in case of an emergency, you can use a small grinder from a drill to saw off some small part.

How to disassemble an angle grinder, gearbox, angle grinder head, disassembly process

If the angle grinder has malfunctions that affect stability in operation, it should be diagnosed to identify their causes. To do this, the power tool must be disassembled; you can do this yourself. The disassembly process (separation of the plastic housing from the gearbox) is shown in the following video.

After checking the functionality of the gearbox mechanics, if necessary, it is disassembled and repaired, as shown in the video.

How to change bearings

Wear of the bearing units of the angle grinder leads to increased backlash, which contributes to the failure of the entire angle grinder as a whole. Therefore, a preventive inspection of the angle grinder is required for the presence of play and, if necessary, replacing them as shown in the video.