Small Angle Grinder With Speed Control

Tips for choosing

The variable speed angle grinder is one of the most popular and widely used tools. Since this tool is represented by different modifications, it is difficult to make the right choice in favor of this or that device. The first step is to decide how the device will be used for domestic or professional purposes. In the event that infrequent and simple work is planned, then a small low-speed machine will do. For the simultaneous implementation of high-quality cutting and grinding of the material, it is best to opt for professional models.

Small Angle Grinder With Speed Control

In addition, it is worth paying attention to the following characteristics of the device:

  • Performance:
  • Minimum and maximum number of revolutions;
  • Additional functions;
  • Disc parameters that can be used with the instrument.

An important criterion when choosing is the frequency of operation of the device. For constant and intensive work, you need to buy models in which the outer case is made of durable metal and supplemented with brass inserts. When installing the pipeline, it is advisable to use devices with the maximum level of protection against water and dirt.

What is the adjustment for??

The quality of cutting and grinding of the material directly depends on the speed set in the angle grinder. Since hard and thick workpieces lend themselves well to cutting at maximum speed, and aluminum, on the contrary, can melt when heated, then when working with them, the speed of rotation of the disk should be adjusted. Control of operating modes is provided only in models equipped with a special controller. This function is useful and used in several cases.

  • When processing stone. This material is well cut and polished at low speeds; for each type of stone, its own disc speed is selected separately.
  • For finishing delicate surfaces that require careful handling. At high speeds, such products can deteriorate.
  • When replacing one circle size with another. In this case, a speed correction is needed.
  • When using in the work of crowns and disks with diamond dusting. To avoid their overheating and breakage, workpieces must be processed at low speeds.

If the tool is only planned to carry out cutting operations, then there is no need for a speed controller. When used universally, the angle grinder is irreplaceable. The speed control system in the angle grinder is represented by integrated circuits. They are reliable in use, function with a soft start system and a tuned module.

Models and their characteristics

Today, angular grinders equipped with speed control are in great demand among craftsmen. This type of tool is well suited for cutting, polishing and grinding workpieces. The construction market is represented by an angle grinder manufactured by both domestic and foreign companies. Models from several brands have proven themselves well.

  • Bosch GWS 850 CE. This device is lightweight for easy handling. The machine has a power of 850W and is good for polishing marble and granite. The set of the tool includes a disc speed regulator with six positions. The minimum speed of revolutions is 2800, the maximum is 11000 per minute, a special nozzle designed for high speed is used for processing wood with a machine. The manufacturer additionally equips the device with a handle, a wrench, discs and washers for attaching attachments.
  • Makita GA5030. It is the lightest grinder (weighs 2 kg) and is designed for simple household work. With the device, you can easily handle cutting, grinding and polishing various materials. Thanks to the additional handle, the workflow is greatly simplified, this model can be used for discs with a diameter of 115 and 125 mm. The tool has a power of 1400 W, thanks to the speed control it is classified as a professional model. In addition, the angle grinder has a switch-on lock, a speed stabilization system, to protect the device from overheating, it is recommended to switch it off periodically during intensive work.
  • Metabo WEV 10-125 Quick. This modification is available with the ability to change the speed and maintain a power of 1200 W, the design provides for an electronic engine overload protection system. The speed of rotation of the cutting wheel automatically changes depending on the type of work and is fixed at variable loads. Of all the 125 mm machines produced, this model is the best, it features a large number of revolutions and variable speeds. The angle grinder also has a safety clutch and replaceable brushes that turn off when the power supply voltage drops. In addition, the manufacturer has supplemented the tool with an overheating indicator, a stabilizer and a long cable.

The Hitachi G13SS modification can complete the review of the popular variable speed angle grinder. Due to its high power indicators and the possibility of using it with discs with a diameter of 150 and 230 mm, it occupies a high rating among the types of this equipment. The device is perfect for both renovation and construction work. The device can cut metal workpieces and grind parts from different materials. A distinctive feature of the device is a narrow grip and low weight, which makes it comfortable to work.

Advantages and disadvantages

Angle grinders with adjustable speed are presented on the construction market in a huge range. Depending on the design features and technical characteristics, they can have both pros and cons. So, household models are compact and lightweight, but their functionality is limited. In such devices, productivity is also reduced, during operation they quickly overheat and require constant stops.

As for professional tools, they are very powerful and endowed with additional functions that allow them to be used for a long time without overheating the mechanism. These angle grinders are of excellent quality, easy to operate and are designed for both cutting and grinding workpieces. The disadvantages of these models are the high price and high weight, since the frame of the device and additional components are made of durable material.

angle grinder with speed control: models, characteristics, subtleties of choice

Every craftsman has at hand such a reliable tool as an angle grinder. With the help of this device, you can not only perform high-quality cutting of material, surface grinding, but also sharpen kitchen knives. Since certain types of work require minimal disc rotation, it is recommended to purchase a device with a speed control.

Features:

The variable speed angle grinder is a versatile and multifunctional tool that makes it easy to handle any task in construction and renovation. The main difference between such an angle grinder is the ability to independently set the speed of rotation of the disk, depending on the type of material being processed. Manufacturers produce a device with an electric motor, the power of which can range from 500 to 1500 W. For cutting workpieces, you can choose machines with an average performance of 800 W, but if you plan to carry out grinding, then it is recommended to give preference to more powerful models, since the area of ​​contact with the surface of the material being processed is larger in this case.

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The angle grinder with speed control is an absolutely safe device to use, since all models are equipped with a full range of protective systems that prevent injury. Let’s list the main.

  • Soft start device. It is responsible for the smooth operation of the tool after pressing the start button. This device can also act as an inrush current limiter, which extends the life of the device.
  • Safety clutch. In the event that, when processing material, the disc of an angle grinder begins to “bite” or wedge, this device starts an emergency stop.
  • Emergency brake. When machining hard material, the tool can twist and pull out of the hand. The brake helps to stop the rotation of the disc in 3 seconds.
  • Coil impregnation with a special compound. Since cutting and grinding of the material is accompanied by the appearance of abrasive dust, its penetration into the device is prevented by additional processing of the coil with a protective layer. This avoids short circuit problems.
  • Heat dissipating slots. Protect the device from overheating during intensive work.
  • Balancing system. The circles of the machine may be ground unevenly, after which trembling and beating of the machine may occur during the processing of workpieces. Special automatic balancing helps to smooth the work.
  • Overload fuse. When the cutting part heats up to a temperature above 160 degrees, the automatic system is triggered, and the rotation speed of the disc first decreases to 200 rpm, then completely stops.

angle grinders with speed control weigh from 2 to 5 kg, their performance depends on the diameter of the disc and the number of revolutions. Mini models are very popular with craftsmen, which are suitable for working with 115 and 125 mm wheels. Their speed ranges from 10,000 to 11,000 rpm. The 115mm disc angle grinder is generally used for cutting material up to 28mm thick and is well suited for sanding wood, tile, porcelain and glass. Devices with 125 mm discs are considered the most popular, as they perfectly cope with grinding the surface of any material and cutting parts with a thickness of 30 mm. If it is necessary to cut and grind steel pipes, bricks and concrete, then it is recommended to use a device with a circle of 150 mm, while metal processing should be carried out at high speeds, and stone at lower speeds.

The attachment of the cutting disc to an angle grinder with speed control is carried out using a spindle stop and a protective key, in some models there is also a self-clamping system. Additionally, manufacturers also equip the tool with a casing that protects the craftsman from dust, sparks in the eyes and breaking the circle on the go.

How to use?

Despite the fact that all models of angle grinder with adjustable speed serve flawlessly, they still require proper care and operation. Therefore, it is necessary to periodically replace the working attachments and contact brushes, add oil to the gearbox and clean the engine compartment from dirt. In addition, a technical check of the tool is also provided; it should be carried out at least once a month.

When replacing the disks, the device must be turned off, the gearbox must be locked with the button, then the old nozzle must be removed and a new one must be installed, pressing it tightly with a nut. Filling with oil is simple: to do this, remove the gearbox cover, having previously unscrewed the mounting bolts. As for cleaning the case from dust, it is carried out using a vacuum cleaner.

Work with an angle grinder must be carried out in accordance with all safety regulations. The technician must wear protective gloves, goggles or a face shield. Do not start cutting material with a broken or cracked blade as it may cause injury. Grinding with a cut-off wheel is also not allowed, and cutting with a stripping.

For cutting and polishing various materials, a certain speed of rotation of the disc is required, it can be adjusted using a special automatic system, which is controlled on the body by moving a lever. Thus, the revs can be easily decreased or increased. In addition, you can reduce the speed using large diameter discs.

For information on how to properly adjust the speed of an angle grinder with your own hands, see the following.

Which angle grinder to choose? Household and professional tools

When buying an angle grinder, you should consider such indicators as rotation speed, power, availability of additional functions and disc sizes.

Angle grinders are indispensable in everyday life. This is an ordinary angle grinder, which is distinguished by its compact size and demanding operating mode. After 10-15 minutes of work, the owner of an ordinary grinder, in order to prevent it from overheating, is forced to take a break. Household angle grinders are not designed for daily use. Their technical performance is significantly lower than that of professional devices that can be used for a long time without fear of overheating. In addition, professional angle grinders are equipped with brass inserts and a metal body. This is due to the fact that they have to be applied in extreme conditions: laying pipelines, earthworks, etc. This environment requires a tool that is maximally protected from dust and moisture.

Professional angle grinder Makita 9565Cv

Angle grinder angle grinder “Makita” 125 mm by adjusting the revolutions ensures the implementation of any kind of work at speeds from 2800 to 11000 rpm. The Makita 9565Cv requires a 125 mm disc and a 220 volt power supply. Power consumption of angle grinder. 1400 watts. Angle grinder 125 mm with speed control 9565Cv is a professional power tool, the design of which contains:

  • Adjustment of rotation speed, which makes it possible to optimize the operating mode. The spindle receives a certain speed required for a specific task: cutting, stripping or grinding;
  • Power button lock. This is important to ensure safety during operation, especially in cases of unplanned power outages (turning off the light, pulling the plug out of the socket). Thanks to the secondary start fuse, the owner of the Makita 9565Cv is protected from arbitrary switching on the angle grinder and does not risk injury;
  • Double insulation;
  • RPM stabilization system, which, due to changes in disk loads, facilitates the process of working with massive labor-intensive parts;
  • Two-position side grip, which provides a secure hold of the power tool during operation. Convenient handle option with anti-vibration function.

angle grinder 9565Cv is an angle grinder “Makita” 125 with adjustable speed and smooth descent, due to which the power tool is protected from critical overloads at the moment of switching on. Smooth start-up protects the angle grinder system and the numerous parts contained in it (disc, winding, engine brushes) from a strong voltage surge. Speed ​​gains smoothly, angle grinder does not tremble in hands.

Household angle grinder Makita GA5030

angle grinder “Makita” with speed control is considered one of the best models of household angle grinders. Her. The Makita GA5030 is lightweight, which does not exceed 1.8 kg, which is an advantage of this tool compared to other similar models in this price category.

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The best grinder manufacturers

Domestic and foreign firms are engaged in the production of angle grinders. German manufacturer Bosch, Japanese Hitachi and Makita achieved high results. They mainly produce models for professional use: angle grinder with variable speed, power exceeding 1200 W and various disc diameters. Angle grinders make it possible to perform any kind of complex work. Using special diamond discs, you can cut concrete and stone, prepare walls for wire. Additional side handle provides control of the powerful power tool during operation.

Universal angle grinders

An angle grinder with speed control is considered universal. Ideal for cutting, sanding and polishing any material.

angle grinder with variable speed and soft start is mainly used when polishing stone or wood surfaces. This is due to the peculiarities of the structure of these materials, the processing of which at high speeds is undesirable, since it leads to surface destruction and rapid wear of the nozzles.

Polishing attachments

The quality of the polishing work depends on the adjustable speed and the correct attachments. Flexible diamond discs are recommended for grinding marble and granite surfaces by experienced stone engravers. For wood, an emery flap wheel is suitable. For polishing metal products and surfaces, it is best to use circles containing felt or felt, which is attached to the attachments with a special Velcro. Felt attachments are also suitable for glass polishing. But in this case, you need to purchase a special diamond paste. Painted or varnished surfaces should be treated with sheep wool attachments.

Hitachi G13SS

The ergonomic shape of the model, the presence of an adjustable handle in its design, which allows it to be installed from either side, the ease of replacing carbon brushes are advantages for Hitachi G13SS that many users have already appreciated.

Metabo WEV 10-125 Quick

This is another variable speed angle grinder. 125 mm is considered the optimum disc size for the Metabo WEV 10-125 Quick. Among all the known 125 mm angle grinders, this model is considered the best in terms of power. It features a wide range of spindle speed adjustment and a constant speed under variable load. This is ensured by built-in electronics that protect the angle grinder engine from overloads and smoothly start the system. The angle grinder has an automatic overload clutch and angle brushes that shut off if power is suddenly cut off. This is important for safety during operation of the powerful angle grinder.

Bosch: Model GWS 850 CE

Angle grinder “Bosch” with adjustable speed and power of 850 watts is ideal for grinding with diamond cups of natural and artificial stone. This angle grinder is one of the most demanded electronic tools in the work of professional stonecutter engravers, who every day face the need to polish in places where granite or marble is cut. This angle grinder is lightweight, which makes operation much easier: the master can hold it with one hand.

Bosch GWS 850 CE variable speed angle grinder comes with a one-year professional warranty.

You can adjust the grinding speed using six positions. The range of speeds of rotation of grinding attachments and discs from 2 800 to 11 000 revolutions.

The quality of polishing directly depends on the speed of rotation of the attachments. The smaller it is, the higher the quality of work. This requirement applies to granite, marble, glass and other surfaces that can be handled with a grinding tool equipped with an adjustment function. For working with marble surfaces, experts recommend choosing the speed at which the sander produces 2800 revolutions. Wood surfaces can be processed with special attachments at the highest speeds. The maximum speed for this angle grinder is 11000 revolutions.

Bosch GWS 850 CE includes a wrench, handle and two fastening washers for discs and nozzles.

PATRIOT AG 122

  • Electric motor power. 860 W.
  • Disk rotation speed. up to 11000 rpm.
  • Disc diameter. up to 125 mm.
  • Weight. 2.3 kg.

LEPSE MSHU-2-230

  • Electric motor power. 2000 W.
  • Disk rotation speed. up to 6600 rpm.
  • Disc diameter. up to 230 mm.
  • Weight. 5.5 kg.

AEG WS 13-125 XE

  • Electric motor power. 1300 W.
  • Disk rotation speed. up to 11 thousand rpm.
  • Disc diameter. up to 125 mm.
  • Weight. 2.5 kg.

What models are popular: top 10

Most of the power tools sold in the Russian Federation are manufactured in the PRC. Only a small part is assembled from Chinese parts. But 10-15 models have been on sale for a long time and have proven themselves well.

Dewalt DWE4257

  • Electric motor power. 1500 W.
  • Disk rotation speed. up to 10,000 rpm.
  • Disc diameter. up to 125 mm.
  • Weight. 2.6 kg.

BOSCH PWS 1000-125 CE

  • Electric motor power. 1 kW.
  • Disk rotation speed. up to 11500 rpm.
  • Disc diameter. up to 125 mm.
  • Weight. 2.1 kg.

BISON angle grinder-P230-2400 PV

  • Electric motor power. 2.4 kW.
  • Disk rotation speed. up to 6000 rpm.
  • Disc diameter. up to 230 mm.
  • Weight. 4.5 kg.

BISON angle grinder-230-2100 PM3

  • Electric motor power. 2100 W.
  • Disk rotation speed. up to 6000 rpm.
  • Disc diameter. up to 230 mm.
  • Weight. 5.1 kg.

Features of the device. Differences between models

The angle grinder (angle grinder) appeared in the middle of the 20th century and quickly became an important tool for manual metalworking. Its advantages:

  • Versatility: the tool allows you to cut, clean and polish.
  • Increased processing speed compared to hand tools and machine tools. this applies to small volumes of work.
  • Ease of maintenance. no adjustment of the angle grinder is required, and its maintenance consists in periodic cleaning, blowing from dust.
  • Small size allows you to carry the angle grinder around the work area.

But there are also negative aspects:

  • Large parts and structures are difficult to handle.
  • Requires 220 Volt network. However, cordless angle grinder is available.
  • Failure to follow safety precautions can easily cause injury.

The angle grinder is an electric motor that transmits torque to the main shaft with fixing nuts through a gearbox. Circles are clamped in them: cutting, cleaning, polishing.

Standard sizes:

A type

Diameters: external / holes for installation, in mm

It is recommended to purchase models with a soft start. this option increases the resource of the motor. After pressing the button, the engine does not immediately reach operating speed, but with a slight delay. that is, it unwinds smoothly.

Adjusting the speed of the electric motor expands the scope of the angle grinder. the tool can be used for grinding and polishing surfaces. These operations are carried out at reduced speed.

Advantages and disadvantages

Angle grinders with adjustable speed are presented on the construction market in a huge range. Depending on the design features and technical characteristics, they can have both pros and cons. So, household models are compact and lightweight, but their functionality is limited. In such devices, productivity is also reduced, during operation they quickly overheat and require constant stops.

As for professional tools, they are very powerful and endowed with additional functions that allow them to be used for a long time without overheating the mechanism. These angle grinders are of excellent quality, easy to operate and are designed for both cutting and grinding workpieces. The disadvantages of these models are the high price and high weight, since the frame of the device and additional components are made of durable material.

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What is the adjustment for??

The quality of cutting and grinding of the material directly depends on the speed set in the angle grinder. Since hard and thick workpieces lend themselves well to cutting at maximum speed, and aluminum, on the contrary, can melt when heated, then when working with them, the speed of rotation of the disk should be adjusted. Control of operating modes is provided only in models equipped with a special controller. This function is useful and used in several cases.

  • When processing stone. This material is well cut and polished at low speeds; for each type of stone, its own disc speed is selected separately.
  • For finishing delicate surfaces that require careful handling. At high speeds, such products can deteriorate.
  • When replacing one circle size with another. In this case, a speed correction is needed.
  • When using in the work of crowns and disks with diamond dusting. To avoid their overheating and breakage, workpieces must be processed at low speeds.

If the tool is only planned to carry out cutting operations, then there is no need for a speed controller. When used universally, the angle grinder is irreplaceable. The speed control system in the angle grinder is represented by integrated circuits. They are reliable in use, function with a soft start system and a tuned module.

Tips for choosing

The variable speed angle grinder is one of the most popular and widely used tools. Since this tool is represented by different modifications, it is difficult to make the right choice in favor of this or that device. The first step is to decide how the device will be used for domestic or professional purposes. In the event that infrequent and simple work is planned, then a small low-speed machine will do. For the simultaneous implementation of high-quality cutting and grinding of the material, it is best to opt for professional models.

In addition, it is worth paying attention to the following characteristics of the device:

  • Performance:
  • Minimum and maximum number of revolutions;
  • Additional functions;
  • Disc parameters that can be used with the instrument.

An important criterion when choosing is the frequency of operation of the device. For constant and intensive work, you need to buy models in which the outer case is made of durable metal and supplemented with brass inserts. When installing the pipeline, it is advisable to use devices with the maximum level of protection against water and dirt.

How to use?

Despite the fact that all models of angle grinder with adjustable speed serve flawlessly, they still require proper care and operation. Therefore, it is necessary to periodically replace the working attachments and contact brushes, add oil to the gearbox and clean the engine compartment from dirt. In addition, a technical check of the tool is also provided; it should be carried out at least once a month.

When replacing the disks, the device must be turned off, the gearbox must be locked with the button, then the old nozzle must be removed and a new one must be installed, pressing it tightly with a nut. Filling with oil is simple: to do this, remove the gearbox cover, having previously unscrewed the mounting bolts. As for cleaning the case from dust, it is carried out using a vacuum cleaner.

Work with an angle grinder must be carried out in accordance with all safety regulations. The technician must wear protective gloves, goggles or a face shield. Do not start cutting material with a broken or cracked blade as it may cause injury. Grinding with a cut-off wheel is also not allowed, and cutting with a stripping.

For cutting and polishing various materials, a certain speed of rotation of the disc is required, it can be adjusted using a special automatic system, which is controlled on the body by moving a lever. Thus, the revs can be easily decreased or increased. In addition, you can reduce the speed using large diameter discs.

For information on how to properly adjust the speed of an angle grinder with your own hands, see the following.

Number of handles

The convenience and safety of work depends on this parameter. The angle grinder comes in one-handed and two-handed. The first option is common among relatively lightweight models, both household and professional. The lightweight angle grinder can be simply supported with the other hand on the body. Two-hand angle grinders are heavy professional and semi-professional models, efficient and safe work with which requires physical strength and a secure grip. It is good if the handle / handles of any angle grinder have a rubberized coating or a vibration damping system.

Disc diameter

The disc is the main consumable for the angle grinder. It is he who cuts, grinds, cleans. When choosing a diameter, it is important to take into account that the “useful area” of the disc, and hence the cutting depth, is about four times less than its diameter. That is, it cuts only the extreme 1 / 3-1 / 4 of the disc. There are discs of 5 diameters:

  • 115 mm is the smallest disc. It is not suitable for main cutting due to its shallow cutting depth (less than 25 mm), but it is good for small jobs and grinding. There are also machines with 100 mm discs designed exclusively for grinding and polishing, but they are narrowly specialized and are not widely used in everyday life.
  • 125 mm is the most popular disc size for household angle grinders with a cutting depth of about 40 mm. With discs for different purposes, it allows you to cut almost all materials;
  • 150 mm is convenient for cutting concrete, brick, metal pipes;
  • 180 mm is useful for those who started repairs or construction;
  • 230 mm. discs for professional grinders with a cutting depth of up to 70 mm, rarely used for household needs. Generally, the larger the disc the angle grinder is designed for, the greater the weight of the tool assembly.

Which grinder manufacturer is the best?

Extra features

A quality angle grinder has useful functions to make the work easier and extend the life of the angle grinder. Their presence indicates the professional purpose of the tool and significantly affects the price. They are also found in a good household tool:

  • “Soft start” (start without jerking);
  • Auto shut-off of brushes in case of short-term power outages;
  • Auto-balancing of the disc (reduces the runout of the disc during uneven erasure, and therefore vibration in the hands);
  • The ability to fix the power button for long-term operation;
  • The ability to change the casing without tools;
  • Automatic (electronic) regulation of the disk rotation speed;
  • Improved dust protection of the stator and armature;
  • Dust removal system (the presence of a special nozzle for connecting a construction vacuum cleaner).

Small angle grinder with speed control

Every craftsman has at hand such a reliable tool as an angle grinder. With the help of this device, you can not only perform high-quality cutting of material, surface grinding, but also sharpen kitchen knives. Since certain types of work require minimal disc rotation, it is recommended to purchase a device with a speed control.