How to Cut a Dust-Free Angle Grinder

How to cut concrete angle grinder without dust. advice from masters

During repair or construction, it is sometimes required to carry out concrete work: cut an opening under a window, a niche, and ditch walls for wiring. Masters know how many small particles are formed. Cleaning after such events is a very laborious task. We suggest figuring out whether cutting concrete without dust is possible and how to organize this process.

Concrete is a durable material, so working with it is quite difficult. To perform cutting, most often use angle grinder (angle grinder). This tool is better known in everyday life as an "angle grinder."

How to Cut a Dust-Free Angle Grinder

A diamond wheel is used as a nozzle. Depending on the design features, they are divided into several varieties:

  • segmented
  • solid;
  • combined (turbocharged).

The first option is a solid base with a segmented edge. Such a circle is low cost, but not too suitable for working with durable materials. It must also be taken into account that it is used only for dry cutting. The solid disk has a continuous diamond edge, so that no chips are formed during operation. Such a nozzle heats up quickly, so it must be cooled with a continuous water stream.

Combined or turbo-diamond disc is universal. It withstands maximum load and is suitable even for cutting reinforced concrete.

Before buying the nozzle of the right type, you need to figure out what material you have to work with. Reinforced concrete is reinforced with metal rods that the cutter may stumble upon in the process. Therefore, if it is supposed to deepen more than 10 cm, use should be made of high-strength discs, i.e. turbocharged ones. Fresh concrete is more abrasive, with time the material hardens, its strength increases. This factor should also be considered when choosing a circle for cutting.

The disk segments are attached to the canvas with silver solder or by laser welding. The first option is more suitable for wet, the second is used only for dry cutting. When choosing a suitable diamond wheel, attention should also be paid to its diameter, which should be suitable for angle grinders. An important criterion is also the speed of the disk. It is better if it is higher than the maximum possible indicator stated in the technical specifications of "angle grinder". This will ensure optimum operation.

Wet Concrete Cutting Technology

Using water allows you to cut concrete "angle grinder" without dust and overheating of the tool. The technology allows you to solve several problems at once:

  • increase the life of the diamond nozzle,
  • Avoid dust
  • increase the speed of work.

One way to ensure that the water supply is continuous is to secure the hose so that fluid enters the disc. If there is no water supply in the working area, an assistant can be involved in the process. He will use a primitive device from a plastic bottle to wet the circle. At the same time, the incision site is wetted with liquid. This must be done carefully so that water is not poured into the tool.

The method is not very applicable in multi-storey buildings, since there is a risk of flooding the neighbors from below.

How to make a casing for a vacuum cleaner with your own hands

The angle grinder with a built-in vacuum cleaner allows getting rid of the “angle grinder” small particles of material formed during the cutting process. But what if there was a need to cut concrete with a conventional tool without additional options? The simplest solution is to purchase a casing for a vacuum cleaner separately or to make a device with your own hands. You can attract an assistant who will collect the particles formed during the cut with a vacuum cleaner.

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It is easy to make a convenient nozzle from a simple plastic canister, in which an automobile “frost-free” is often sold. For work, you will need a construction cutter and a container of a suitable size, the neck of which will fit in diameter to the hose of the vacuum cleaner.

The manufacturing sequence is as follows:

  • Mounting holes are cut on both sides so that you can easily change the direction of rotation of the disk.
  • A suitable slot is made under the circle.
  • To attach the cutter, an “angle grinder” cuts another hole.
  • The hose is docked with the neck of the canister and fastened with a transition ring with a clamp.
  • "Angle grinder" is laid in the casing and all elements are connected.
  • The unused hole is covered with a lid.

A good dust collector will turn out from a simple five-liter polyethylene bottle. It is attached using a standard protective casing, and the nozzle of the vacuum cleaner to the neck. This design is suitable for any kind of work, except for chipping.

Last tip: in order to make a cut evenly, marking is first applied. Then along the line are fixed wooden blocks. After this, a shallow incision is made up to 1 cm, the stops are removed and the work continues. Throughout the process, coolant is supplied to the blade of the disc. Perform all manipulations in safety glasses, a respirator and gloves.

Concrete cutting and drilling technology

  • How to cut concrete?
  • How to cut concrete?
  • How to drill concrete?

Concrete cutting is carried out during various construction works, depending on this, the appropriate tool is selected.

When carrying out repairs, it is often necessary to cut concrete, for example, for communications.

Cutting can be done for laying the cable, in order to remove the window opening (for integration with the loggia), if you need to dismantle any part of the concrete structure during the redevelopment of the room. The cutting technology itself is not very complicated, but it requires certain knowledge and skills, as well as physical strength.

How to cut concrete?

At home, for cutting concrete, an angle grinder (angle grinder) with diamond disks is most often used. But, before starting work, it is necessary to determine the quality of the concrete coating, since the choice of tools will depend on this. Old concrete is much harder than recently laid, therefore, Turbo diamond disks are used for cutting it, having a wave casing that perfectly cope not only with this task, but without special problems cutting metal reinforcement, often present in cement screed.

Видео: How to Cut a Dust-Free Angle Grinder


For cutting concrete, it is customary to use diamond blades.

The concrete contains various fillers that give the surface a certain type of strength. So, river sand is considered harder than sand extracted from rock, when cutting quartz and basalt, diamond nozzles can become dull, so you need to stock up on interchangeable ones. If a large screed is present in the concrete screed, for example, gravel, then diamond wheels with a soft bundle of segments are used for cutting, and the angle grinder also reduces the speed. The power of the selected tool is important: the higher it is, the better and stronger the nozzle should be. For high-power angle grinders, a disk with a higher diamond content and a higher bundle of segments is selected, otherwise the blade can become dull quickly.

Diamond blades made by laser welding of segments are considered the most durable and high-performance, they are mainly used for dry cutting. Cutting concrete without dust (wet method) involves the use of discs with soldered segments containing silver solder. When choosing a nozzle for a certain type of work, it is necessary to pay attention to its diameter and the size of the mounting holes, they must correspond to the technical characteristics of the tool, which will be used to cut the concrete coating.

Back to the table of contents

An angle grinder will act as a tool for cutting concrete.

  • angle grinder or wall saw;
  • diamond coated discs;
  • wooden slats (guides);
  • protective clothing.

Before you begin to work, you must take care of your own safety. Be sure to use a respirator that will prevent dust from entering the lungs, do not forget about special glasses and clothing with protective inserts. The most commonly used is dust-free concrete cutting, in which a stream of water is directed to the blade, which ensures a continuous process, significantly reduces the amount of dust, increases work efficiency, and maintains the sharpness of the blade for a long time. But in some cases, wet cutting is contraindicated, for example, when a large amount of water can damage the tool or there is no water supply nearby.

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Dry cutting technology is significantly different from wet cutting. During operation, the blade should not heat up, for this reason it is necessary to allow the tool to rest: the disc is removed from the cut, it is allowed to turn for 1-2 minutes at free speed or the saw is turned off. If it is necessary to perform a deep cut, then the work is carried out in several stages. The first step is to mark with a chalk on the floor a cut line along which wooden guides are installed. This ensures evenness of the cut and smooth movement of the tool.

First, make a shallow cut of 0.5-1 cm, give the tool a rest, then cut the surface again, etc.

Use a wall saw to make vertical concrete cuts.

The operation is repeated until the desired result is achieved.

If you want to cut a vertical concrete surface, then for this purpose a special wall saw with a diamond blade is used, which has a low noise level and high performance. A special hydraulic line is connected to the tool, which ensures the flow of water to the blade, as well as a vacuum cleaner with a nozzle, which provides dust cleaning. If it is necessary to make an opening in the wall, then the work is performed as follows: first, marking is done with chalk, after which several control holes are drilled in concrete (at the corners), from which the cut is made first horizontally, then vertically.

Back to the table of contents

For drilling holes in concrete, a perforator with a special drill is often used. This tool has its advantages and disadvantages. With its help, you can drill only small holes from 3 to 5 cm in diameter, which is clearly not enough if you need to make a move for the release of ventilation pipes.

Concrete wall drilling pattern.

If it is necessary to drill a deep hole, and reinforcement is present in the concrete surface, then, having stumbled upon such an obstacle, the tool may burn out.

For drilling holes from 5 to 45 cm, a powerful hammer drill with a carbide crown is used. Crowns with a diameter of up to 25 cm can be used on a low-power tool. Experts do not recommend using adapters in order to install the crown from a powerful punch to a low-powered one, as this will damage the tool. In addition, working with such a tool is unsafe.

The victory crown can only cope with thin reinforcement, if during drilling it stumbles on a thick metal grate, then its teeth will certainly break off. If you need to drill a through or deep hole, then first use a victorious crown, then apply a peak, then again take a crown, etc. If necessary, install a special extension cord on the tool.

Diamond drill is the best tool for drilling concrete, with its help you can get holes of any diameter and different depths. Due to the presence of water cooling, almost no dust is formed during operation. The diamond crown easily copes with the fittings, which is important. Such a drill has a tubular design that allows you to drill very deep holes. Using the recommendations of specialists, you can easily do the cutting and drilling of concrete with your own hands.

How and what is the right way to cut concrete

In the process of repairing apartments and houses, as well as in the construction of the "new building", one has to deal with such works as cutting concrete. If the repair is not global, but local, the question arises sharply: how to cut concrete with a diamond disk, angle grinder, without dust.

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Do I need to make the strobes in the concrete wall, cut openings for windows and doors, or just make a recess. in all cases, disks for a concrete angle grinder will be one of the best solutions. Although the least dusty, the more expensive work option would be the classic sledgehammer.

At home, with self-repair, a concrete grinder with a special diamond blade is used for cutting concrete. In some cases, if someone is repairing professionally, you can use a chipper. However, an angle grinder is a more versatile tool, and for a one-time repair it does not make sense to purchase a chipper.

Choosing diamond blades for cutting concrete

Casing for angle grinder for a vacuum cleaner

However, the main problem when cutting concrete with an angle grinder is the huge amount of accompanying dust generated during cutting. It’s good if you have a angle grinder with a built-in vacuum cleaner, and if not. And here you need to give a few examples of how to find a way out:

  • The easiest way is when one operates an angle grinder, and the other stands next to it and collects dust with an ordinary indoor vacuum cleaner.
  • As already described above, purchase a tool with a built-in vacuum cleaner.
  • Having changed the design of the casing, attach the vacuum cleaner yourself. There are many ideas on this topic on the Internet.
  • Water the diamond blade while working with water. By the way, this technique gives the effect better than a vacuum cleaner. But here again: either work together with the “watering agent”, or attach a hose with water so that water is supplied to the disk.

How to angle grinder cut concrete

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Enlarging door and window openings can be a lot of trouble. For many homeowners, carrying out these works becomes a difficult task.

Find out here how to quickly and quickly cut the required hole in concrete without excess dust.

We cut concrete ourselves

Professional teams that provide services for cutting reinforced concrete products have equipment in their arsenal that allows them to perform all work quickly and with minimal dust. It will be necessary to call specialists when it is necessary to cope with a large amount of work. Otherwise, you can try to cut a hole yourself.

To do this, you will need:

  • 4 or 5 inch angle grinder (disc diameter 100 mm or 125 mm);
  • a diamond blade of the appropriate size, it can be ordinary segmented or TURBO.

When choosing diamond blades, you should pay attention not only to the price, it is lower for conventional cutting elements. But also for productivity, this figure is significantly higher for turbo blades for diamond cutting.

Ways to Reduce Dust

For many craftsmen, dust becomes a significant obstacle when cutting concrete structures. It not only makes breathing difficult, but also significantly reduces visibility, which can affect the accuracy of the work.

Very often, craftsmen attach a vacuum cleaner to an angle grinder. During operation of the coal grinder, the included vacuum cleaner collects dust, preventing it from scattering in different directions.

There is another way that can reduce dust. It is called wet cutting. The bottom line is that water is supplied to the disk, which moistens the concrete and prevents dust from forming. When using water, special discs for wet diamond cutting must be used.

Compliance with safety when working with an angle grinder

The eruption of holes in reinforced concrete is invariably accompanied by a large amount of dust and a high level of noise.

Therefore, it is necessary to use personal protective equipment:

  • a mask that protects the eyes from dust and debris;
  • respirator. Provides free breathing in the dust cloud;
  • special anti-noise headphones. They are able to protect against strong industrial noise, but they make it possible to hear the interlocutor’s speech and other quiet sounds;
  • protective overalls and mittens. Their use will help protect the skin from injury from large particles of concrete.

Observance of the necessary safety measures will allow carrying out work even with a large emission of dust.

In the video, we look at how to cut an angle grinder and concrete puncher: