Rating of the best battery grinders for 2022

The set of a modern master will be incomplete without a “grinder” - an angle grinder that came to us in the early 70s. of the last century from Bulgaria and became popular due to its practicality and versatility.

Now there are many products on the market that do not differ much in design, but have a different set of capabilities. The best manufacturers are constantly looking for innovative solutions to improve products through the introduction of the latest battery power supplies. This review will present the best cordless angle grinders, their characteristics and description, advise what to look for in order to avoid mistakes when choosing, and also clarify how to choose and which one is better to buy.

Purpose

Cordless angle grinder (angle grinder, angle grinder) is an autonomous hand-held power tool equipped with a grinding or cutting disc and powered by a rechargeable battery (battery).

Originally used for processing flat joints. However, with the development of building technologies, the scope has expanded significantly.

Where is used

An angle grinder with a battery will be needed in the field if it is not possible to connect to the electrical network to perform the following actions:

• grinding, polishing or cutting of metal products - fittings, beams, corners, pipes, channels;

• cleaning old paint or corrosion;

• cutting bricks or ceramic tiles, as well as cutting strobes in the walls;

• brushing wood to give an aged look;

• production of cutting machines, machines for sharpening chains.

Each type of material requires its own special disk:

• grinding for metal up to six millimeters;

• grinding petal;

• cutting for metal up to two millimeters;

• cutting on ceramics or concrete with a diamond edge;

It is not recommended to use angle grinders for cutting wood or glass; there are tools for this purpose!

Advantages

The popularity of models is due to a number of advantages:

• Mobility - autonomous use of the tool without connecting to the mains.
• Small weight and size values ​​with a mass of products no more than four to five kilograms.
• Reduced noise compared to network products.
• Ease of use without a power cord limiting maneuverability.
• Low power with a comfortable grip and difficult cuts.
• Ease of use.

Flaws

• High cost due to battery equipment. The larger the battery capacity, the longer the unit functions, but at a higher price.
• Low power depending on battery capacity.
• Short battery life without recharging.
• Poor selection of models.

Depending on the nature of the actions performed, the average duration of the battery grinder is 20-30 minutes. Battery capacity for grinding is enough for 40 minutes, and for sawing concrete - 20 minutes.

Design and principle of operation

Main components:

• durable plastic case with holes for ventilation from two parts connected with screws;

• electric motor;

• a gearbox for transferring rotational energy from an electric motor to a spindle with an installed disk. Comprises:
  • two bearings and a planetary gear on the axle;
  • clamping nut at the end of the shaft;
  • sun gear pressed onto the armature axis;

• release clutch to prevent reverse motion when the wheel jams;
• device for regulating the speed of rotation of the spindle;
• overload protection system;
• soft start and engine start buttons;
• nut for fastening the circle;
• spindle lock button for disc replacement;
• a device for maintaining a constant rotation speed during labor-intensive operations;
• anti-vibration system;
• protective cover;

• accumulator battery.

 

The standard power supply voltage for angle grinders is 54, 36, 24, 12, 10.8 V. As a rule, power supplies are assemblies from batteries from 1.2V (nickel-metal hydrite or nickel-cadmium) to 3.6V (lithium-ion) .

The best drive manufacturers usually use brushless motors with increased efficiency, small dimensions, long service life, and low noise levels. As a rule, such motors are electronically controlled with a simple implementation of soft start modes, with speed control, maintain speed under load, and stop immediately.

Work

The cordless angle grinder is powered by an electric motor, started by a switch or a locking button. When unwinding, the motor shaft transmits the rotational force to the spindle through a gearbox with driving and driven gears with spur or helical gearing.

Complex and expensive models are equipped with a split clutch between the gearbox and the motor to protect against jamming in order to prevent kickback.

Main characteristics

The values ​​of the main parameters determine the reliability, strength, as well as the functionality of grinders.

1. Disc diameter.

The thickness of the cut material depends on the indicator. Standard values ​​​​from 11.5 to 23 centimeters.

• 11.5 cm - inexpensive models for simple use at home, for example, for grinding;
• 12.5 cm - for use in everyday life during repairs and for professional purposes without processing thick materials;
• 15 and 18 cm - for home use and professional use;
• 23 cm - for professional use in construction for cutting any thick building materials. Not suitable for grinding due to high power and dimensions.

2. Rotation speed.

The value indicates the number of revolutions per minute of the spindle, which for modern models is 2800 - 11000. So, with a 18-23 cm disk, you can start 6000 rpm, and with 11.5 cm - 11000 rpm.

The larger the circle, the less turns.

Types and classification

By application class

1. Household.

Models are made with small dimensions and weight. They have minimal functionality with reduced performance due to constant stops to cool the mechanism.

2. Professional.

Powerful models with additional features for long-term use.

Features of professional angle grinders:

• large battery capacity;
• fast charging;
• good wear resistance of components with a long service life;
• overheat protection;
• increased weight and size characteristics;
• multifunctionality.

By number of handles

1. One-handed.

They are used when cutting or grinding for circles up to 12.5 cm. The main handle is the body of the unit with an additional removable handle fixed on the sides of the gearbox in two positions.

Safety rules prohibit working with one hand.

• mobility;
• high build quality;
• small price;
• ease of operation;
• universal application for cutting or grinding.

2. Two-handed.

Powerful models for cutting thick or hard materials with large wheel diameters.

Peculiarities:

• multifunctionality;
• large mass;
• high price;
• application for professional purposes.

By size

• Small - length up to 27 cm, height up to 10 cm, for circles 11.5 - 12.5 cm.

• Medium - length up to 35 cm, height 12-13 cm, for discs 15 - 18 cm.

• Large - length 40 cm, height more than 14 cm, for circles 21 - 23 cm.

Criterias of choice

When choosing a suitable model, the following parameters are taken into account:

1. Battery capacity in ampere * hours - the power and time of use without recharging depend on the value.
2. Voltage - when compared with capacity, you can roughly determine the operating time at maximum without recharging.
3. Circle diameter - the maximum cut is slightly less than half the diameter.
4. Speed ​​control - provides processing of different materials.
5. Additional handle for comfort.
6. Protective cover - for increased safety.

Video - What to choose: battery angle grinder or network:

Where could I buy

Cordless popular models are purchased in the power tool departments of hardware stores or supermarkets. In addition, new items are easy to order online in the online store or with Ali Express, China's largest network service for the purchase and delivery of goods.

The best information on angle grinders is provided by the Yandex.Market Internet aggregator, whose pages show the main characteristics and photos, customer reviews, tips and tricks - which company is better, how much it costs, and you can also go to the store via a direct link to choose budget models to buy.

The best battery grinders

The rating of quality products is made up of models by application class - for domestic and professional use.Positions in the list were determined according to the opinion of buyers and popularity on the pages of leading online supermarkets of power tools, such as 220 Volt, Kuvalda, VseInstrumenty, etc. It is noteworthy, but there are no Russian-made models in the presented list for objective reasons.

TOP 6 best household cordless angle grinders

DeWALT DCG405NT

Brand - DeWalt (USA).
Country of origin - China.

Stand-alone model angle grinder for cutting and grinding operations with metal or other material. The unit with a disc diameter of 125 mm is powered by an 18 V battery, purchased separately. In the event of a kickback, the electronic Kickback Brake system stops immediately, increasing safety. Internal components are reliably protected from damages by the anticorrosive metal case.

In the event of an overload, an automatic shutdown occurs to prevent damage. The load is reduced by soft start. Spindle lock simplifies tool changes. The mesh filter on the ventilation openings traps dust.

• mobility;
• high performance;
• light weight;
• ergonomic design;
• excellent build quality;
• stylish design;
• long service life;
• no overpayment for the battery and charger (charger);
• good price-quality ratio;
• protection against accidental inclusion;
• case included.

• stable operation requires a large capacity battery more than 5A;
• there is no fixation of the start button, which is noticeable during long use.

Video review:

WORX WX803

Brand - Worx (Germany).
Country of origin - China.

Cordless angle grinder model made in China for cutting and grinding metal.Powerful 20V battery-powered motor delivers high performance and rotational speed. Comfortable operation is ensured by a slim body design that promotes precise control of the tool. With prolonged use, the load on the user's hands is evenly distributed by using an additional handle installed on both sides.

Spindle lock allows quick tool changes. A special cooling system and ventilation protect the motor from overheating. The internal mechanisms of the tool are reliably protected by a shock-resistant case. Supplied at a price without overpayment for the battery and charger.

• light weight;
• autonomy;
• simple replacement of equipment;
• protection against overloads and overheating;
• the presence of a protective casing from sparks and dust;
• long service life;
• anti-vibration handle.

• clearly expressed were not found.

Video review of angle grinder:

Einhell TE-AG 18 Li-Solo

Brand - Einhell (Germany).
Country of origin - China.

Very light model made in China for cutting, peeling and grinding metal blanks in the workshop, garage or at home. A circle with a diameter of 11.5 cm rotates at a maximum speed of 8500 rpm. When overheated, to prevent damage or failure, the tool automatically turns off. The case protects the internal mechanisms from damage, and the material is not subject to corrosion.

Can be powered by a generator. Protection against abrasive dust, sparks or working debris is provided by a casing covering the cutting wheel. Heat is efficiently dissipated through the ventilation holes in the case. The use of an anti-vibration system reduces shaking and prevents "white fingers syndrome".The ergonomic handle can be mounted on both sides for the convenience of right-handed or left-handed people.

• convenient handling;
• low noise;
• with soft start;
• quick replacement of the protective cover;
• the lightest unit in its class;
• metal reducer for better thermal conductivity;
• automatic shutdown at an overload;
• a case for a removable key in the handle;
• common battery for the model range;
• good value for money.

• high sensitivity of the power button for spontaneous shutdown.

REDVERG RD-AG18V

Brand - RedVerg (Russia).
Country of origin - China.

A reliable model of an angle grinder for cutting and grinding operations in places where there is no access to the mains. A common tool with a diameter of 125 mm is installed. The gearbox has a spindle lock button. Adjustment of the protective cover is carried out without additional devices.

The case has special inserts to prevent slipping. The equipment is changed with a special key included in the angle grinder set. The additional handle is installed in three positions on the body. You can choose the battery yourself, as it is not included in the kit.

• mobility;
• three-position additional handle;
• ergonomic design;
• extended service life due to ventilation holes;
• anti-slip pads on the body;
• spindle lock when changing tooling;
• protection of the user by a special casing;
• small price.

• the start button is not fixed;
• charger not included;
• low rotation speed.

Video review of the device:

Ryobi ONE+ R18AG-0

Brand - Ryobi (Japan).
Country of origin - China.

Completely autonomous model from China under the Japanese brand for surface grinding, metal cutting, as well as stone trimming. The product easily copes with the removal of rust or burrs. The small size and small diameter of the circle provide comfortable use in hard-to-reach places. At the same time, due to the low weight, fatigue is not felt in the process of long-term work.

One+ technology allows you to use different tools with different battery capacities from the Ryobi range. As a result, there is no overpayment when buying an angle grinder without a battery included.

The Softgrip coating ensures an ergonomic fit in the hand, preventing the device from slipping out. Fast change of equipment is carried out by pressing of one button. The ingress of dust or sparks is prevented by a protective cover that can be installed without additional tools.

• light weight;
• stylish design;
• lies well in the hand;
• the versatility of One+ batteries;
• convenient key switch;
• easy installation and adjustment of the protective cover;
• additional three-position side handle;
• a special footboard for a stable position in an inverted position;
• excellent build quality.

• low rotation speed;
• rather weak for serious work;
• short charge retention on small batteries;
• start button missing.

Video review of the angle grinder:

Denzel BLG-IB-18-02

Brand - Denzel (Germany).
Country of origin - China.

Autonomous high-performance angle grinder made in China under a German brand for cutting, grinding, cleaning metal structures using special abrasive wheels or brushes.Installing a state-of-the-art brushless motor ensures cost-effectiveness and high reliability. The unit is equipped with a spindle lock and keyless locking of the protective cover for easy disc replacement and adjustment.

The working resource is increased by the use of an improved ventilation system that protects the engine from dust ingress. The tool is powered by a dual-capacity rechargeable battery capable of recognizing the type of load, and is also compatible with other products in the model line.

• increased resource of brushless motor;
• battery charging indication;
• easy tool change due to spindle lock;
• improved ventilation system;
• high reliability and efficiency of the electric motor;
• comfortable operation with side handle;
• exclusion of jerks when switched on by the soft starter system.

• clearly expressed were not found.

comparison table

	DeWALT DCG405NT	WORX WX803	Einhell TE-AG 18 Li-Solo	REDVERG RD-AG18V	Ryobi ONE+ R18AG-0	Denzel BLG-IB-18-02
Disc diameter, mm	125	125	115	125	115	115
Bore diameter, mm	22.2	22.2	22.2	22.2	22.2	22.2
engine's type	brushless	brush	brush	brush	brush	brushless
Battery type	Li-Ion	Li-Ion	Li-Ion	Li-Ion	Li-Ion/Ni-Cd	Li-Ion
Voltage, V	18	20	18	18	18	18
Spindle thread	M14	M14	M14	M14	M14	M14
Rotation speed, rpm	9000	8600	8500	7000	7500	10000
Electronic speed control	No	No	No	No	No	Yes
Keyless tool change	Yes	No	No	No	No	No
Dimensions, mm	497x351x156	340x125x274	290x142x108	135x135x310	340x132x140	415x360x280
Weight, kg	1.74	1.54	1.21	1.7	2.15	2.2
Guarantee	3 years	2 years	3 years	1 year	2 years	3 years
price, rub.	9436 - 11450	5909 - 7090	3599 - 3998	3590	4488 - 5 040	7145 - 9700

TOP 5 best professional cordless angle grinders

Milwaukee M18

Brand - Milwaukee (USA).
Country of origin - China.

Universal stand-alone angle grinder for professional cutting and grinding of metal products or other materials in places where there is no mains power. Equipped with a powerful brushless POWERSTATE motor capable of performing more than 60 cuts of stainless steel pipe on a single battery charge. High performance is ensured even under increased load. It has an increased level of safety due to the equipment of an effective braking system. Keyless tool change is performed with a FIXTEC nut.

• mobility;
• compactness;
• reliability;
• convenient change of equipment with a quick-clamping nut;
• rubberized handle for a secure grip;
• reduced vibration level;
• with the function of preventing accidental start;
• Removable dust screen
• long service life;
• high build quality;
• the presence of a case.

• high price.

AEG BEWS 18-230BL-0

Brand - AEG (Germany).
Country of origin - China.

Universal model made in China for professional cutting and grinding of metal products or other materials in areas where there is no power supply. High performance and extended time are achieved by using a brushless motor. Batteries, charger and case are not included.

• mobility;
• soft start;
• protection against accidental inclusion;
• increased resource and efficiency;
• anti-vibration side handle;
• fast braking system;
• long service life and warranty;
• excellent build quality.

• without case;
• requires a battery with a higher capacity;
• high price.

Video review of the grinder:

Bosch GWS 12V-76 Professional Solo

Brand - Bosch (Germany).
Country of origin - Germany.

Compact mini stand-alone angle grinder for cleaning surfaces, sanding and cutting wood, metal, plastic or rebar.

High speed is achieved by installing a powerful brushless motor powered by a 12V battery. Package does not include charger and battery.

• powerful electric motor;
• high rotation speed;
• long service life;
• compactness;
• small dimensions;
• ergonomic design.

• poor protection against dust;
• high sensitivity to automatic shutdown;
• Requires a large capacity battery
• non-standard expensive consumables;
• no speed control.

Equipment video review:

Makita DGA900Z

Brand - Makita (Japan).
Country of origin - China.

Stand-alone model angle grinder for professional cutting and grinding operations with metal or other materials. The unit with a disc diameter of 230 mm is powered by two 18 V batteries, purchased separately. The rubberized case fits comfortably in your hand. You can attach an additional handle to the left or right for convenience.

• mobility;
• high performance;
• ergonomic design;
• excellent build quality;
• stylish design;
• long service life;
• without overpayment for the battery and charger;
• simple change of equipment;
• automatic shutdown when the circle stops;
• protection against accidental activation.

• stable operation requires high-capacity batteries;
• case is missing.

Video review of this angle grinder:

Metabo WPB 36-18 LTX BL230 0

Brand - Metabo (Germany).
Country of origin - Germany.

Mobile construction model made in Germany for professional cutting and grinding of metal products or other materials in places where there is no power supply. High performance and long service life is achieved by using a high-quality brushless motor. Rotatable main handle allows use in hard to reach places.

A simple change of equipment is carried out with a spindle lock. Powered by two batteries purchased separately.

• mobility;
• high performance;
• slide switch;
• a large number of revolutions;
• embossed handle for comfortable use;
• long service life;
• excellent build quality;
• plastic trunk.

• it is necessary to use batteries with a large capacity;
• high average price.

Video testing of angle grinders:

comparison table

	Milwaukee M18 FLAG230 XPDB-0C	AEG BEWS 18-230BL	Bosch GWS 12V-76	Makita DGA900Z	Metabo WPB 36-18 LTX BL230
Disc diameter, mm	230	230	76	230	230
Bore diameter, mm	22.2	22.2	10	22.2	22.2
engine's type	brushless	brushless	brushless	brushless	brushless
Battery type	Li-Ion	Li-Ion	Li-Ion	Li-Ion	Li-Ion
Voltage, V	18	18	12	2x18	2x18
Spindle thread	M14	M14	M5	M14	M14
Rotation speed, rpm	6600	5500	19500	6000	6600
Speed ​​control	No	No	No	No	No
Keyless tool change	Yes	No	No	No	No
Dimensions, mm	425x140x180	642x218x309	340x202x88	499x250x158
Weight, kg	5.3	5.2	0.9	8	6.1
Guarantee	5 years	6 years	3 years	1 year	3 years
price, rub.	30500	23771-26147	8678-11600	15299-22730	56799

Safety

Reasons for the danger posed by the angle grinder:

1. The presence of an open section of a circle that rotates at high speed.
2. Sharpness of abrasive discs.
3. Lack of a stable foothold.

Handling rules

1. Developing skills in handling the unit, mastering the principle of uniform distribution of the load and the rejection of a dangerous operation.
2. Monitoring the condition of the working disk for the absence of chips or breaks.
3. The use of separate circles for each type of operation according to the purpose.
4. Observance of attentiveness, calmness and caution. Pay special attention to hidden obstacles, clamps between supports, and when cutting under the weight of the structure or on the fly.
5. Continuous monitoring during tool operation:

• before starting, to prevent a jerk, the circle should not come into contact with foreign objects; it does not start until it is included in the cut;
• the tool must be turned off after performing any operation, avoiding idling when changing position, walking or communicating with comrades;
• after grinding or cutting, the disc stops against a tree, it is not allowed to lay the tool with a rotating circle.

Mandatory: Use of personal protective equipment.

Happy shopping and stay healthy!