What is the planting diameter of the angle grinder

Choice and replacement of discs for angle grinder

Angle grinder (angle grinder), in common parlance is called “angle grinder”, is widely used on construction sites and at home during repair. With its help, you can perform many different technological processes. In order to choose the right tool for a particular type of work, you need to get acquainted with what discs and attachments for angle grinder. The tool for this device is chosen by size and purpose.

When selecting a wheel for the angle grinder, make sure that the outside diameter of the grinding head does not exceed the maximum permissible values for your angle grinder. For example, if your angle grinder is designed to use a wheel with a maximum diameter of 125 mm, you cannot fit a 230 mm wheel on it. And there are several explanations for this:

  • will be exceeded the linear velocity of the cutting edge, which is fraught with the destruction of the abrasive disk and causing injury to the user;
  • the small angle grinder does not have enough power to work with a large tool;
  • installation of a sleeve larger than the permissible dimensions requires removal of the protective cover, and this is a violation of safety rules.

Discs for angle grinder have standard sizes: 115, 125, 150, 180 and 230 mm. Planting diameter (diameter of the shaft on which the tool is installed) in modern bolt cutters is almost the same and is equal to 22.2 mm. If you have an “lying around” angle grinder of an obsolete model, you will need to use adapters. rings of different diameters.

All abrasive wheels of all sizes have a special marking, from which you can learn the following information: disk diameter and thickness, diameter of the seat, the maximum rotation speed, as well as for processing what materials it is designed.

Design, principle of operation, additional functions

Angle grinder consists of a cylindrical body, an electric motor placed inside, and a shaft located at right angles to the rotating axis of the disc. The connection is made by means of a gear mechanism (gearbox).

The angle grinder must be held with one hand during operation. For comfortable use, an additional handle is screwed into the front of the machine.

Constructing of angle grinder DIOLD MSHU-1,2-01-150. Photo AllTools.hand

One of the main parameters of the angle grinder is the outer diameter of the grinding or cutting wheel. According to this feature, they can be divided into one- and two-handed:

  • One-handed. do not have a main handle. Diameter of a disc 100, 115, 125 mm. Weight up to 2.5 kg;
  • Two-handle models. the main handle is located at the back of the machine. There is also an additional handle. The size of the circle is 125-230 mm, and the mass of the machine is 2.5-6 kg.

The disc is fastened on the reducer (shaft) and tightened with the special nut. For better fixation of the disk, SDS quick-clamping nut is used, which can be unscrewed without special tools. The side that will hold the disc depends on the function of the disc itself, since the nut is double-sided.

Droplets of raw material in the form of sparks are dangerous, that’s why the cutting wheel is covered with a special protective cover from the user’s side.

angle grinder (angle grinder) Makita GA6040C has all the features presented. 220Volt photo

For safety and additional convenience, manufacturers add unique functionality to the tool:

  • soft start. Protects the tool from excessive strain during start-up. The function prevents the jerking of the device when it is turned on;
  • balancing system. Suppresses vibration that occurs during uneven disc rotation;
  • protection against accidental start. Is an additional button which, when pressed, unlocks the main button on the tool;
  • RPM support under load. Enables easy machining of the workpieces, stabilizes the rotation speed of the disc for any variation;
  • Rotation speed selection. Allows to switch the required mode for the specific process.

Angle grinder operation is powered by a removable battery or mains power. The latter uses a mains cable coming out of the instrument’s transversal edge.

How to correctly change the disc on the angle grinder

Since the angle grinder discs are consumables, they must be replaced sooner or later. They are fastened to the angle grinder spindle by means of a clamping flange (nut) with an M14 thread. To unscrew it, in the complete set to the angle grinder must go a special wrench, which has pins on one side.

How to Grow Mushrooms on Logs | Complete Inoculation Walkthrough!

So, to replace the tool on the angle grinder, proceed as follows.

  • De-energize the machine by pulling the plug.
  • Fix the spindle of the angle grinder with the button located on the front of the housing. When you press the button, the stopper enters the hole in the disk installed in the gearbox, and this fixes the spindle in a stationary position.
  • Insert the wrench pins in the holes on the clamping flange.
  • Hold the retainer with one hand, with the other hand turn the key to the left (counterclockwise) until the nut is released from its place. Then it can be unscrewed without a wrench and removed from the shaft. In this case, the spindle of the angle grinder rotates clockwise. But in what direction to unscrew the nut, if your machine shaft rotation is counterclockwise? Remember: Always unscrew the clamping flange in the exact opposite direction to the rotation of the shaft.
  • Now you can change the tool after removing the old one. If you notice that dirt has accumulated inside the housing, you should remove the bottom flange and use a steel brush to remove dirt from all surfaces.
Read more:  What can be done from a broken angle grinder

After the above steps the tool change is considered to be complete.

How to choose an angle grinder

A simple layman, who occasionally uses an electric tool, it is difficult to decide on his choice. The wide range of angle grinders in specialized stores baffles the potential buyer. These are not construction gloves. use and throw away.

The tool is not purchased for one year, it must be reliable, safe and reasonably priced. Sign up for the Cashback Service. And buy at the best price. In our, even in Chinese stores cheaper by 15% or more.

How to choose an angle grinder? The recommendations given in the article will help make the choice of the tool.

Angle grinder types and their purpose

Angle grinder (commonly known as “angle grinder”) is designed for grinding, stripping and cutting metal, stone without the use of water.

In practice, its application is much wider: it comes in handy electrician for cutting chisel in concrete or bricks, плиточником. for undercutting tiles, plumbers. for cutting any pipe, regardless of material, including polypropylene and metal. Versatility angle grinder can easily perform all these tasks. Depending on the power and the ability to endure prolonged load angle grinder are divided into classes:

They are distinguished by design features, purpose and price. The professional tool is designed for intensive use for a long time. It is characterized by:

Domestic tools are designed for much less load. Work cycle time for a household angle grinder should be about 15 minutes, followed by the same break. During the day, use of the tool should not exceed two to three hours. If you intend to use an angle grinder occasionally, it is quite acceptable.

The semi-professional grinder is an intermediate variant between professional and household tools, the best solution for home craftsmen who often use the tool, as well as professionals who need an angle grinder in the process of work.

Professional and semi-professional tools of well-known brands: Hitachi, Kress, Makita, Metabo, Bosch, AEG.

Power tools from well-known brands: Ryobi, Bosch, Skill, BlackDecker, Zubr, Elitech, Kalibr, Vihr, Patriot, Sturm, Fiolent.

Important parameters for tool selection

What angle grinder to buy from the selected professional class? When choosing, you should be guided by the main working parameters of the tool.

Disc diameter

Each grinder model is designed for a specific disc diameter. The depth of cut is approximately one-third of the disc diameter. Knowing the types of work to be performed by the angle grinder, the most suitable tool is selected:

planting, diameter, angle, grinder

115 mm. cutting depth is less than 25 mm, designed for minor work and grinding, it is not suitable for basic cutting because of the insignificant depth of cut. The tool with this parameter has little weight and low power.

125 mm. cutting depth approx. 40 mm. The optimum choice for domestic use. Most cutting and grinding discs are adapted to this size.

150 mm. cutting depth about 50 mm. Convenient for cutting pipes made of metal, brick, concrete.

180 mm. cutting depth of about 60 mm. Used by construction and renovation specialists. Difficult to do small jobs.

230 mm. cutting depth approx. 70 mm. Inconvenient for small jobs. The tool for big volume jobs.

The larger the disc diameter, the greater the weight and dimensions of the tool for which it is designed.


The amount of time an angle grinder is able to work intensively without damaging the device depends on this indicator. Except for professional tools, the power of an angle grinder is not related to the disc diameter. Power range of grinders from 500 to 2600 watts. Which angle grinder is better, does it have to have a lot of power?

For the home craftsman, the power of the tool from 600 to 1000 watts will be enough to perform simple works. If you have to do a lot of work associated with repairing apartments, building a holiday home, where you intend to use the grinder, the preferred model with a capacity of 1500 watts.


The number of revolutions is optimized by the manufacturer for a particular model. Grinders designed for larger disc diameters have a lower RPM than tools that use smaller discs. For example, a powerful professional angle grinder for disc diameter 230 mm has a RPM of 6 thousand. per minute, and an angle grinder for 115 mm discs can have 9 thousand. RPM.

It is not bad when the tool is equipped with a speed regulator, which allows you to reduce the rotation speed. This function is necessary when sanding and when working with the material, when working with which large revolutions are contraindicated. Cutting stone and tile, for example, is dangerous. And the use of discs of different diameters requires adjustment of their rotation speed.

Read more:  What Are The Discs For The Angle Grinder

Additional features

Your quality tool is packed with extras that will not only make your work easier, but will also extend the tool’s service life. Professional tools include these features, but utility models may also include some of these enhancements in their design. Their presence has a tangible effect on the price of the tool.

A “soft start” is necessary for tools with high power. It will eliminate the sharp jerk of the angle grinder when it is turned on.

Autoshutdown of the brushes in a momentary power outage. Safeguards the user if the power supply is suddenly interrupted and then restored during work.

The autobalancing of the disc will considerably reduce the runout of the cutting or grinding disc if it is worn unevenly. The vibrations in your hands are reduced.

What is the thread on the angle grinder?

Angle grinder (angle grinder) has become an integral part of both home workshops, and large enterprises. This is not surprising. High performance, wide functionality, high number of revolutions on the spindle and relatively low weight have made the angle grinder a leader in processing metal and other materials.

But progress continues. New accessories to expand the capabilities of the device constantly appear on the market. One of these adapters allows you to mount a clamping chuck on an angle grinder. What to get out of this and how to safely use such a tool, it is proposed to consider in more detail in the context of this article.

  • Interface kit
  • Installing a chuck on an angle grinder
  • What you need to know about angle grinder to use it in conjunction with a chuck
  • Applications for angle grinders
  • Safety precautions

Adapter arrangement

The adapter itself is not structurally difficult. As a rule, it is turned from a hexagon for easy fixation with a wrench when installing, and especially when removing. M14 female thread tapped on one side.

It is designed for screwing it onto the male thread of the angle grinder spindle. The other end is machined to a standard M12 male thread to match the clamping chuck thread.

At the end there is a hole drilled and cut left thread for the bolt for additional attachment.

Attention! The M12 cartridge thread standard is the most common, but far from the only one. When selecting an adapter, pay attention to the marking of the selected chuck, at least you can come across a couple of other standard thread types: M12×1.25 and 1/2 to 20 UNF.

planting, diameter, angle, grinder

There are also cone adapter drills and angle grinders for matching chucks with cone locking.

Installing the chuck on the angle grinder

To install the chuck on the angle grinder must perform the following steps:

  • The adapter is screwed onto the “bare” spindle of the angle grinder
  • A chuck is screwed onto the other end of the adapter
  • Previously loosening the jaws of the drill clamp, screw in the bolt of additional fixation. This operation is convenient to perform with a screwdriver with a magnetized tip.

Note! All threaded connections must be tightened well at once. Because the system “pulls itself up” when it is turned, it must not move freely in the thread during the start jerk.

Dimensions and characteristics of cutting-off wheels:

115 mm. small disk, ideal for small tasks and sanding material. But it is not suitable for cutting, because it has a shallow depth of cut.

125 mm. one of the most popular sizes for angle grinders. It enables you to work in a variety of materials: metal, stone, etc.

150 mm. well suited for work with strong workpieces that require a significant load: concrete, large metal pipes.

180 mm. suitable for continuous construction work.

230 mm. this disc diameter is suitable for professional angle grinders. Used on industrial construction sites, and seldom for domestic needs.

Table of wheel sizes that are perfect for the mentioned brands of grinders

Wheel diameter Grinding machine brands
115 mm Bosch GWS 7-115 E, Bosch GWS 1000.
125 mm Makita GA5030, Bosch GWS 7-125, Metabo WEV 10-125 Quick, Bosch GWS 14-125 Inox.
150 mm Metabo WE 14-150 Plus, Sparky MB 1600CPA.
180 mm Makita GA7020, Bosch GWS 22-180 LVI, Metabo W 24-180.
230 mm DeWALT D28401, Bosch GWS 20-230 H, Makita GA 9020 (GA9020).

In this table, we have indicated the experts’ opinion on the choice and rating of grinders for the appropriate size of circles. There are a number of other popular brands that will also be suitable for the necessary work. Each of the five types of plate saws has its own special feature. If you are involved in construction, then pay attention to several types of bolt cutters at once. And for domestic tasks we recommend to take the optimum size of 125 mm. For construction and repair work, the 180mm is great.

What size wheels are best for cutting metal, concrete and wood?

One of the most common and popular tools is metal discs. They come in all of the above sizes and are suitable for small as well as large lathes. If you want to make a thin cut when working with metal, then take a disc 115 or 125 mm, as their thickness from 1 mm. 2,5 mm. Suitable for cutting thin sheet metal. For working with steel, large materials it is better to use discs of bigger diameter.

Why you need a BIG angle grinder

Read more:  How to Sharpen a Hacksaw on a Wood Angle Grinder

Hard grinding disks are used for thoroughly deburring seams before welding. They are used to grind away excessive protrusions on the surface of metal with old paint, resulting in a smooth surface.

Petal ones are also used for working with metal, as well as wood. Better to use with delicate tasks: lacquer coatings, thin curved metal surfaces.

Cutting discs for stone are used for cutting tiles, bricks, slate, paving stone. There are two kinds of such discs: diamond and dry-cut. Diamond discs are durable and resistant, and are best for cutting red brick and concrete.

planting, diameter, angle, grinder

Diamond discs are divided into the following types: for dry cutting (segmented), wet and universal.

Dry cutting discs have slots all around their circumference, so they are able to cool. Sizes that will fit under the angle grinder from 115 to 230 mm. When sawing stone, the disk has the ability to heat up strongly, so you need to take a break every 1-2 minutes. In this application, it will last longer and the diamonds will not fly out. It is a good way to work with concrete and granite.

Wet cutting discs are shaped flat with no gouges so you can cut without splinters. Often they work with them on special devices with water supply, where they cut tiles. If used with an angle grinder, it is pre-wetted in water.

Universal ones are suitable for any type of stone, and you can work with wet or dry cutting.


The most important thing in the operation: Do not put larger discs on the angle grinder than specified in the operation of the tool. Because it can break during use. Remember that the larger the disc, the less the speed needs to be rotated.

Very often the angle grinder is popularly called “angle grinder“. It is well and widely used in construction, as well as during the repair can be a great help. Enables a variety of technical processes.

Typical disk sizes

When selecting a disc for an angle grinder, make sure that the outside diameter of the tool does not exceed the maximum allowable values allowed for your angle grinder. For example, if the angle grinder is designed to use a wheel with a maximum diameter of 125 mm, it can not be installed on a wheel 230 mm. And there are several explanations for this:

  • the linear speed of the cutting edge will be exceeded, which is fraught with the destruction of the abrasive wheel and causing injury to the user;
  • A small angle grinder does not have enough power to handle a large tool;
  • a tool that is larger than the maximum allowable dimensions requires the removal of the safety guard, and this is a violation of safety rules.

Discs for angle grinders have standard sizes: 115, 125, 150, 180 and 230 mm. In modern lathes seating diameter (diameter of the shaft, which is installed the tool) is practically the same and is equal to 22.2 mm. If you “got” an outdated angle grinder, you will need to use adapters. rings of different diameters.

All abrasive wheels in all sizes are marked with a special data sheet showing the following information: disk diameter and thickness, seating diameter, maximum rotation speed, and the type of material they are to be machined.

How to replace

The disc of the angle grinder is a consumable. That’s why it often needs to be replaced. There is a simple algorithm in which an important role is played by the original design key, delivered to the consumer with the angle grinder.

  • – The protruding pins of the special key are inserted in the grooves of the fastening nut.
  • – At the same time, press the locking button on the gearbox housing. It will secure the rotor against rotation.
  • – Turn the wrench counterclockwise to release the fastener on the worn disc.
  • – Replace the old disc with a new one of the same dimensions and specifications. A new disc is installed with the marking facing outwards to remind you of the disc parameters and for other good reasons (see “Discs”). explanation in the video above).
  • – The fixing nut is pre-tightened by hand and finally tightened with the special wrench.

the angle grinder is ready to continue to perform its functional purpose.

Purpose of the discs

The discs that are used on the grinder have different purposes:

  • For cutting metal. you need a disc that is made of crystalline alumina corundum.
  • For cutting stone and concrete. the disc must be made of silicon carbide, it can easily cut through brick and slate.
  • For the ceramic plate. a diamond disc is needed.

Important! The nozzle is made on the basis of metal, on the crumb of which a mass of abrasive with diamond crumbs is applied

  • for wood. the use of a disc for sawing trees is not safe for the user and can cause various injuries, although such discs are on sale, experts do not recommend using them.

Choosing discs to work with different materials, it is necessary to take into account all the features that may arise during the work.