Best Angle Grinder For 2021

Best Angle Grinder For 2021

 

Angle grinders are a versatile tool for cutting and grinding various materials. The choice of angle grinder depends on the type of work performed and the planned intensity of using the tool.

To determine which grinder is better, you need to analyze such parameters as disc diameter – 4.5 to 9 inches, the larger this value, the deeper the maximum possible cut; power – from 500 to 2000 W, affects the processing speed and permissible material thickness, the number of revolutions – from 6600 to 12000.

Additional functions that need to be taken into account – smooth start, dust protection, speed control, fixing the “Start” button. To make it easier for you to choose the Best Angle Grinder, we have compiled a rating of grinders based on user feedback and taking into account the technical and operational characteristics of the tool.

TOP 9 best angle grinders/angle grinder reviews

Dewalt DCG412B

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BLACK+DECKER G400

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Bosch 1375A

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DEWALT (DWE402)

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Makita 9557PBX1

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PORTER-CABLE PCC761B

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Makita XAG04Z

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Avid Power 7.5-Amp 4-1/2 inch

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DEWALT DCG413B

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1. Dewalt DCG412B

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The DeWalt angle grinder is a tool designed for grinding and cutting various materials. They are used by a wide variety of professions. Various enterprises have more than a dozen Bulgarians in their arsenal. Most often, this tool is used by car services, metal rolling, as well as any enterprises working with metals.

Characteristics of DeWalt grinders:

  • Power. High power guarantees high performance.
  • Disc diameter. This characteristic affects both the depth of cut and the productivity of the work.
  • Speed. The cutting speed depends on this characteristic.
  • Weight. Ergonomic component.

The DEWALT DCG412B angle grinder is designed for grinding and cleaning surfaces. The powerful and reliable electric motor provides rotation speed up to 6500 rpm. The disc is covered with a shroud to protect the user from sparks and dust. Helical metal gears of the reducer reduce vibration. The quick-clamping nut makes disc replacement quick and easy.

        Specifications

  • Item Weight – 4.82 pounds
  • Product Dimensions – 7.32 x 16.75 x 4.75 inches
  • Style – 20V 4-1/2″ Grinder (Tool Only)
  • Power Source –  Battery Powered
  • Battery Cell Type – Lithium-Ion

 

2. BLACK+DECKER G400

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The Black & Decker G400 angle grinder is designed for applications such as sanding, surface cleaning, and cutting of various materials. An additional handle for secure holding of the tool can be installed on the left or right. The disc is covered with a metal casing so that the operator is protected from accidental contact with the cutting element, as well as the escape of small chips and sparks into the eyes and onto clothing is excluded.

Benefits:

  • Compact and lightweight angle grinder for novice users for basic cutting and grinding of metal and stone.
  • Ergonomic body with comfortable grip for better control while working.
  • Quality metal bearings, reliable hypoid gear transmission, and dustproof switch for long service life.

Specifications

  • Item Weight – 4.51 pounds
  • Product Dimensions – 12.5 x 5.19 x 4.63 inches
  • Style  – 20V 4.5 angle grinder (Tool Only)
  • Power Source – Corded-Electric
  • Voltage – 120 volts

 

3. Bosch 1375A

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Angle grinder Bosch 1375A is used at a professional level in construction and repair work, designed for grinding, cleaning, and cutting metal structures. The tool has such functions as electronic speed control, spindle fixation. There is a soft start system. Carbon brushes and discs change quickly and easily without causing downtime.

Benefits

  • Overload protection. Thanks to the direct cooling of the electric motor, the service life of the angle grinder are significantly extended.
  • Reliable hold. The side handle of the tool can be set in two positions for convenient work in hard-to-reach places.
  • Security. The spindle lock ensures an easy and safe change of grinding wheels.
  • Continuous work. The lock button allows you to work continuously for a long time.

Specifications

  • Item Weight – 5.35 pounds
  • Product Dimensions – 14.4 x 5.2 x 5.2 inches
  • Size – 4-1/2″
  • Power Source – Electric-powered
  • Wattage – 680 watts

4. DEWALT DWE402

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The DEWALT DWE402 angle grinder guarantees the maximum comfort of use, as it is equipped with an additional side handle, which provides a secure grip and control of the device during use. The tool has a well-thought-out safety system: it is equipped with a protective metal casing that prevents sparks from hitting clothing. The spindle lock provides quick tool changes as well as additional operator safety.

Features of Dewalt angle grinders

  • the ability to quickly adjust the casing without using additional tools;
  • the tool is very compact due to the low-profile gear housing;
  • the grinder has an anti-vibration side handle;
  • advanced engine cooling due to special air channels.

Specifications

  • Item Weight – 6.2 pounds
  • Product Dimensions – 15.63 x 5.94 x 4.81 inches
  • Style – 20V 4-1/2″ Grinder (Tool Only)
  • Power Source – Corded-Electric
  • Voltage – 120 volts

 

5. Makita 9557PBX1

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Compact but powerful Makita angle grinder, allowing one-handed operation. Small body diameter for easy handling. Labyrinth design protects all bearings from dust and debris. The armature coated with several layers of protective varnish and the stator coated with powder varnish protect the motor from dust and damage, guaranteeing sufficient strength even when cutting ceramic, brick, and stone.

Features

  • Quick change of equipment. The grinding discs can be changed quickly and safely thanks to the spindle lock.
  • Ease of management. The set with the Makita 9557PBX1 small angle grinder comes with a side handle for comfortable control of the tool in hard-to-reach places.
  • Reliable hold. The small diameter of the main handle allows you to comfortably and securely hold the angle grinder tool with one hand for a long time.
  • Cooling. Ventilation slots in the hottest areas for optimal cooling of the working elements.

Specifications

  • Item Weight – 12.42 pounds
  • Style – 4-1/2″ Grinder (Tool Only)
  • Power – 7.5 amp
  • Power Source – Electric-powered
  • Voltage – 120 volts

 

6. PORTER-CABLE PCC761B

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Durable PORTER-CABLE PCC761B Angle Grinder with excellent ergonomics. The PCC 761 angle grinder from the American manufacturer is part of an innovative tool system powered by 20-volt batteries. The compact, ergonomic, and highly productive machine provides long runtime on a single charge. It handles aggressive cutting, sanding, and sanding hard surfaces with ease. Besides, the high-strength gear housing with high heat dissipation prevents the power tool from overheating during extended use.

Key Features:

  • the turbine is powered by a high-performance motor providing up to 8500 rpm;
  • the lockable spindle is responsible for quick tool change;
  • contoured handle provides a comfortable and secure grip;
  • variable speed helps to work with different materials;
  • the protective cover is adjustable without tools;
  • full metal gearbox housing guarantees high-quality heat dissipation;
  • 3-position side stick allows you to choose the most comfortable way of control;
  • overload protection enhances user safety.

Specifications

  • Item Weight – 6.75 pounds
  • Product Dimensions – 15.31 x 6 x 6 inches
  • Power Source – Battery-Powered
  • Style – 4-1/2″ Grinder (Tool Only)
  • Material – Cast metal gear

 

7. Makita XAG04Z

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Makita DGA504Z cordless angle grinder with an excellent power-to-size ratio. The DGA504Z cordless model is an innovative angle grinder from the Japanese brand Makita. Thanks to its reliable brushless motor, optimal disc size, and advanced Extreme Protection technology, it is ideal for intensive use. Built-in Automatic Torque Drive automatically adjusts cutting speed based on load conditions for incredible productivity. The grinder also has several other useful features that make it the most powerful in its class.

Key Features:

  • a highly reliable motor without brushes functions much more efficiently than brushed counterparts and has a long service life;
  • ADT technology optimizes performance by varying the number of revolutions according to load conditions;
  • the gear housing rotates allowing the operator to adjust it to the most suitable position for the application;
  • a charge level sensor helps monitor the battery status;
  • restart protection prevents accidental start after power interruption;
  • XPT-technology (ExtremeProtection) increases resistance to dust and moisture;
  • the device runs on 18-volt lithium-ion batteries;
  • soft start minimizes fluctuations when the device is turned on;
  • indicator LEDs warn that anti-start and current limiter are activated;
  • rubberized soft handle guarantees a secure grip and comfort in control;
  • The slide switch is conveniently located for one-handed operation;
  • battery cells are protected against overvoltage and over-discharge;
  • side handle provides additional control while performing butt

Specifications

  • Item Weight – 4.8 pounds
  • Product Dimensions – 8.4 x 13.3 x 5.5 inches
  • Material – Polymer
  • Power Source – Battery Powered
  • Style – 4 angle grinder
  • Voltage – 18 volts

 

8. Avid Power 7.5-Amp 4-1/2 inch

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Powerful Angle Grinder – Equipped with a 7.5 Amps motor with 900W max output power, this portable grinder can produce a no-load speed of 11000RPM for most demanding applications. Ergonomic Design – Slim, lightweight, and compact body design can provide better comfort and reduce fatigue in professional cutting and grinding applications. Convenient Operation – Integrated spindle lock on the disc grinder is for quicker and easier abrasive wheels replacement; 2-Position auxiliary handle position for greater control, comfort & versatility in all applications. Safety Protection & Durable – During operation, the protective cover of the portable grinder will prevent sparks and metal chips during use to protect you from injury. Package Included – Angle grinder, 2 x Metal grinding wheel, 2 x Cutting wheel, 1 x Side handle, 1 x Spanner, 1 x Flap discs, user manual, and US based customer service.

Specifications

  • Item Weight – 5.07 pounds
  • Product Dimensions – 11.8 x 4.9 x 4.5 inches
  • Size – best 4 1/2 angle grinder
  • Power Source – Corded-electric
  • Voltage – 120 volts

 

9. DEWALT DCG413B

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DEWALT DCG413B angle grinder has a compact size and is convenient and lightweight. With its help, cutting and grinding various materials. The spindle lock option allows quick and safe tool changes. An anti-vibration handle reduces vibration during use and maximizes work comfort. User safety is ensured by a protective cover that prevents food and sparks from getting on clothes. Battery and charger sold separately.

Benefits:

  • brushless motor increases operating time on one charge cycle up to 50% and power increase by 20%;
  • instant stop of the disc when turning off the tool, as well as an electronic system of protection against kickback when the equipment is jammed;
  • a rocker switch ensures that the engine is turned off after the button is released;
  • a mesh filter on the vents traps dust particles to extend tool life;
  • quick-clamping nut allows you to install the equipment without a key;
  • ergonomic body design, good weight distribution

Specifications

  • Item Weight – 3.75 pounds
  • Product Dimensions – 12.2 x 4.7 x 6 inches
  • Style – 20V Brushless 4.5 inch angle grinder (Tool Only)
  • Power Source – Battery-powered
  • Batteries – 1 Lithium-ion battery required.

 

About prices and brands

Which company to choose a grinder? It can be difficult to decide since the choice is large enough. In the catalogs of online stores, you can count up to 7 dozen brands that produce angle grinders. Among the manufacturers, there are both well-known companies and little-known brands. Some brands specialize in professional technology, some have a lot more home tools in the catalog.

For professional angle grinders, the determining criterion is the ability to work for a long time without interruptions, but such models are traditionally more expensive. Household tools are created with the expectation of continuous operation for 10 minutes, after which they need a break of 15-20 minutes. Household models, in general, should not work more than 3 hours a day, but their price is significantly lower than that of professional grinders.

How to distinguish professional from household appliances? In general, the division is highly arbitrary and almost always subjective. There are no clear criteria. Domestic models are generally designed to work with discs and attachments up to 150 millimeters in diameter. It is the most versatile and most popular format. In professional models, discs with a large diameter can be used, such angle grinders are heavier and more expensive.

Disc Size and Types Angle Grinder

The sizes of the discs intended for the grinder may be different. Each of them has certain diameters – internal and external. The internal one is linked to the landing size of the angle grinder. For household grinders, it is the same – 0.9 inches. The depth of cut or the area of ​​the ground surface depends on the outer diameter of the wheel. A larger blade gives a deeper cut. Diameters of external discs for grinders: 4.5, 7, 9. Circles have different thicknesses. When choosing, you need to give preference to those that are thicker. A thin disc will wear out faster.

With that in mind, the size of the disc is just one of many important features. You should also consider the disc types that come with the grinder before buying or at the very least, the disc types that are compatible with the grinder.

Types of discs What are the discs for the grinder?

Wheels for an angle grinder are classified according to the following parameters:

  • type of work;
  • the material from which the circle is made;
  • the form;
  • sizes.

There are special circles – for wood, metal, concrete, artificial and natural stone, etc. The marking indicates which material the nozzle is suitable for. Each type can be suitable for several types of processed surfaces. For example, a stone disc for a grinder cuts concrete, brick, ceramics, paving slabs, etc. But it is impossible to cut or grind metal in a circle on wood or a stainless steel nozzle on rough steel. LBM process, including, asphalt, plastic, glass, fiberglass. If necessary, you can find special discs for an angle grinder (grinder) for porcelain stoneware, granite, reinforced concrete, marble, ceramics, tiles, bricks, plastic. If you want to save money, it is preferable to look for a universal circle that processes several types of materials at once.

Classification by type of work

By the type of work performed, circles for best grinders are:

  1. They are designed for making cuts, rough cuts, etc. The cutting disc has a cutting edge that is either a solid circle or is divided into segments.
  2. Sawing. The cutting edge has teeth. A grinder is used to trim many types of wood products and their substitutes. You need a saw blade to get the job done. This type of circle is designed to make a smooth, clean-cut of solid boards, plywood, parquet, drywall. It is also suitable for laminate, fiberboard, chipboard (including laminated), as well as the selection of grooves in gas silicate.
  3. Rough (grinding wheels). Such attachments remove the old layer of paint, varnish, primer from the treated surface, and carry out grinding.
  4. Stripping. This is a kind of peeling. These include disc metal brushes. They can remove rust and other stubborn dirt.
  5. Petal circles. They are also referred to as cleanup. The flap disc is used when processing metal, wood, plastic products, cleaning welded seams and burrs, removing rust, etc. A flap disc for a grinder consists of overlapping plates along the circumference, according to the principle of flower petals. Varieties: end, batch, with a mandrel. The flap end wheel on the grinder is designed for processing at an angle or a regular flat. There are two subspecies – straight and conical. A straight flap disc is needed when grinding over a large area. Flap cone disc is suitable for finishing seams, joints, etc. The flap (folded) batch disc is also suitable for large areas. Grinding wheels with a mandrel for a grinder are used when working with cavities. They help to achieve the highest machining accuracy.
  6. For cutting seams. They are used when making joints in concrete, asphalt, etc. With such attachments, the grinder is also suitable for this work.
  7. Polishing. Such wheels are used for the final polishing of surfaces. These include polishing replaceable felt and felt attachments for the grinder with Velcro, as well as an emery wheel.

Discs for angle grinders are made from several different materials.

Each of them has its characteristics. Types of wheels for angle grinders:

  • Diamond. They are made of diamond-coated steel. This type of attachment cuts and grinds any metal, concrete, artificial and natural stone (including granite and marble), ceramics, glass. The grinder’s diamond saw blade provides the thinnest cut. You need to cut with small cuts. A new type of diamond attachment – polishing wheels on a flexible base (“turtle”). Their surface has a corrugated structure in the form of a turtle shell (hence the name). Flexible diamond discs are attached to a base – a hard rubber attachment with Velcro.
  • Carbide. Circles of this type are also made of metal. They have high-carbon molybdenum steels with additions of chromium and nickel at the edges. They are used mainly for cutting metals, less often for wood. The grinder is suitable for working with many metals. There are carbide discs specially designed for thin, high-carbon, stainless steel, aluminum.
  • Abrasive. The base is thick waterproof latex paper with reinforcing mesh or fiber. A layer of abrasive material is applied to it – particles of aluminum oxide, silicon carbide, tungsten carbide, or corundum. The bond for the abrasive is a resin or polymer. A grinding fiber disc for the grinder is used complete with a backing pad made of plastic or rubber. It serves as a stop and cools the abrasive. Abrasive wheels are used as cutting, grinding, or roughing wheels. Fiber discs are suitable for wood and concrete, non-ferrous, and ferrous metals. The abrasive is zirconate or aluminum oxide, ceramic grain. Fiber discs are ideal for roughly removing old paint from walls, facades, and other surfaces.
  • Metal wire stripping. Disc brushes made from this material are used to remove rust and other types of stubborn plaque.

The discs for the grinder can be conditionally attributed to the support plates. They are also called backing discs or Belleville discs. Plates are made of plastic or rubber. They are used in combination with some grinding, polishing, grinding abrasive attachments, emery wheels. The need to use a platter should be clarified when purchasing a particular circle for angel grinders.

When cutting with a grinder, many types of materials (concrete, ceramics, etc.) generate a large amount of dust. It is advisable to avoid harmful consequences for the person performing the work, as well as the deposition of dust on the surrounding objects. Therefore, the technique of “wet” cutting is used. During work, make sure that the cutting edge is moistened with water, then there is less dust.

 

How to choose a grinder: important features

The main criterion for choosing a grinder is for what purposes and how often the tool will be used. According to the intensity of use, all angle grinders can be divided into three classes:

  1. household – grinders of this type are designed to perform a wide range of tasks at home and occasional use. These are tools of small (up to 1000 W) power, in which the engine is not designed for long-term continuous operation; due to heating, the grinder may turn off. Their important advantage is that they are very compact, lightweight, convenient to work within hard-to-reach places, where you need to achieve good quality, even if you have to hold the grinder with just one hand;
  2. professional – very productive and powerful (more than 2000 W in the case of two-handed ones), designed for continuous long-term use. To increase the operating time of the tool, various options for engine cooling are implemented in their design (forced ventilation, the use of special materials with increased heat transfer), and special materials of high quality and increased wear resistance are used. They have more weight and dimensions, in the overwhelming majority – two-handed models;
  3. semi-professional – in terms of their characteristics, they occupy an intermediate position between household and professional models. Powerful enough (up to 1500 W), they can be used for long-term operations such as sanding surfaces in a car workshop.

Also, there are several other factors to consider:

  • the cut quality of a thin blade is better than that of a thick blade. But at the same time, a thin disc is not suitable for long-term cutting in a deep cut – due to friction, the disc will very quickly become thinner. Therefore, the thickness of the disc is selected based on the depth of the cut.
  • the larger the diameter of the circle, the lower the speed the grinder should work, wide discs are designed to operate at a speed of no more than 6.6 thousand revolutions per minute, medium – no more than 8.5 thousand rpm, small – up to 11 thousand revolutions per minute.

Disc speed control

Optimally – the speed of rotation of the disk is selected depending on the density of the material to obtain a high-quality cutting line; for soft materials (plastics, as well as thin aluminum alloys), it is necessary to set a low speed – then the edge will not have time to get too hot and will not float. For hard materials such as steel sheets/rods, the higher the speed, the easier and faster the cut will be. Many professional models of grinders have a speed adjustment function, it can be implemented in different ways: a switch with several fixed positions or a smoothly moving lever. In household models, such a speed adjustment is not common, as this immediately leads to an increase in the cost of the tool. Different manufacturers approach this problem in different ways, in some grinders the maximum speed is set – 10-11 thousand rpm, in some – a compromise solution, about 6-8 thousand rpm (most often in models that are designed to work with large discs).

Dust protection

Aggressive abrasive dust arising during the cutting of material is the main enemy of grinders, its ingress into the body leads to breakage of the tool. Besides, the removal of dust allows you to extend the service life of the cutting blade by at least 2 times. In different brands, the issue of dust protection is implemented in different ways:

  • improved build quality, use of special rubber seals;
  • the most common option, especially in budget models – the motor windings are protected by covering them with several layers of especially strong resin;
  • installation of elements that block the ingress of dust, but at the same time allow for efficient heat exchange by removing warm air;
  • in professional models, a dust removal system is provided, which allows you to connect industrial vacuum cleaners. When performing a large amount of work, this allows you to keep the room clean, and most importantly, the builder’s lungs;
  • in some models, the dust removal system is implemented inside the housing by installing an impeller in front of the engine armature. As a result, the airflow picks up large particles and throws them to the walls of the body, thus, dust, even passing through the body of the grinder, does not settle and does not accumulate on important units and parts of the tool.

Video – 10 Best Angle Grinder Accessories

Smooth start

The presence of a soft start system allows the engine to pick up speed evenly, without sudden jerks, this eliminates shock loads on its elements at the time of starting. Also, without this system, when the electric motor is connected, very high inrush currents occur, which place a significant load on the power system. If the grinder is powerful and there are several consumers on the same line at once, then the overloads that have arisen can lead to the protection operation or cable burnout. Besides, large inrush currents can lead to winding breakdown – this is the most common cause of damage to electric motors without a soft starter.

Disk balancing

The automatic disc balancing function is found only in leading brands of grinders. It allows you to reduce the runout that occurs due to uneven wear on the disc. This function is especially important for powerful angle grinders, which are used mainly for grinding surfaces since when cutting, the discs wear out fairly evenly. This function allows you to reduce vibrations and, as a result, stress on the hands of the worker.

Self-disconnecting brushes

A function that is found in the models of angle grinders of premium brands, allows you to significantly extend the life of the grinder. The protection is triggered by a short-term power outage, such a “shutdown-on” jump is very harmful to high-speed motors. The self-deactivation function of the brushes prevents the engine armature from burning.

Position of the guard

The casing is used to protect the worker from shrapnel hit. For budget models, it is either rigidly fixed or to change its position, you must use a hex wrench or screwdriver. For models of the professional class, the position of the protective cover can be changed without using an additional tool, adjusting it depending on the characteristics of the work being performed.

Safety system

An angle grinder is a potentially very traumatic tool that requires very careful and careful handling. Having a multi-factor security system will be an important advantage, the most common functions are:

  • protection against accidental start – protects against unintentional activation, for the grinder to work, it is necessary to simultaneously activate two buttons. Their location is thought out so that they cannot be pressed accidentally at the same time, for this, it is necessary to hold the grinder in the working position;
  • anti-jamming protection – stops working if the disc gets stuck in the material during operation. Stopping the disc prevents the occurrence of a traumatic situation associated with kickback;
  • re-inclusion – in case of a short-term loss of electricity, you will need to re-enable the tool;
  • maintaining the speed – the disc speed remains stable (thanks to constant electronics) even when working under a very heavy load.

Disc holder

On older models, disk replacement was carried out using a special key. Newer models have a special SDS nut that allows you to change the disc in a matter of seconds without using an additional tool. This feature is important if you often have to change the type of disk during operation, it can significantly save time.

Video – How to Use the Best Angle Grinder?

Conclusion

The angle grinder has become an indispensable tool in everyday life, at a construction site, in a factory shop, in a repair hangar. The versatility of this device allows you to perform a wide variety of jobs. A successful choice of a grinder is a guarantee of a quality result, as well as a pleasant and safe process.

 

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