How to cut through concrete with an angle grinder without dust

How to saw with an angle grinder without dust

Sawing with an angle grinder on concrete, brick, stone or tile generates a lot of dust. In this article we will tell you how to saw with an angle grinder without dust.

Dust not only contaminates the room or work area, but also has a detrimental effect on human health.

It is also much more difficult and uncomfortable to work in dust.к. it is difficult to breathe and nothing can be seen.

Two methods can be used to work without dustiness.

The first method is wetting

The easiest way to cut concrete or bricks without dust is to moisten them with water.

For this you can use an ordinary spray gun

or a squirt gun (made from a plastic bottle with holes in the lid), or a child’s water pistol/automatic pistol.

Spraying the object should be done directly during the sawing so that the dust is immediately wet, not having time to disperse.

Due to the fact that the sawyer’s hands are busy with the angle grinder, it is quite difficult and inconvenient for him to simultaneously saw and spray, in addition, it is not safe.

Therefore, a second person must do the spraying.

In tandem, all the work can be done quickly enough and without difficulty.

This method does not require any significant effort, but there is quite a bit of dirt, t.к. The dust turns into a slurry, spills on the floor, and flies in different directions.

The second method is more efficient and practical.

The second way to connect the vacuum cleaner

This method consists in connecting to the angle grinder construction vacuum cleaner with improvised means.

Polypropylene drain with a diameter of 50 mm, under 45 degrees;

Scotch tape reinforced (for greater reliability);

The components described for this method can be replaced by any suitable analogues.

Step-by-step instructions

1) Place the angle grinder on the floor, table, or other surfaces of the machine. so that it lies disk upwards parallel to the plane of the base.


angle grinder should be stable enough.

Attachment on the angle grinder for connecting a vacuum cleaner How to cut concrete without dust DIY

2) Take the branch with pliers or some kind of clamp.

3) Turn on the angle grinder and literally saw the spigot along the body, under the hood of the angle grinder, about 3 cm.

4) We take reinforced adhesive tape, and tightly, with the tension, we tape the tap to the body of the angle grinder, with a small overlap (a couple of centimeters) in the saw blade.


The spigot must be fixed firmly so that it stays absolutely still.

concrete, angle, grinder, dust

5) Use masking tape to stick it on the open side of the cover and fasten it to the saw blade.

This design allows you to easily connect a vacuum cleaner and saw with an angle grinder without dust.


You may only use a vacuum cleaner for this kind of work.

When sawing, you should insert the saw blade in the material to be treated on the motor side closest to the gas sampling hose.

That way all dust can escape through the outlet and into the vacuum cleaner.


Sawing objects make the engine forward.

Safety precautions

Such a system does not have any serious structural changes in the device angle grinder.

We have only attached a nozzle to the body of the tool.

And masking tape closed the second part of the casing, this element can create the false impression of protection.


The masking tape is only designed to protect against dust.

You must therefore observe all safety precautions when working with an angle grinder.

How to cut through concrete with an angle grinder without dust

How to tap a wall for wiring: step by step instructions

With the need to shrewd walls faced by almost anyone who have decided to engage in repair their own apartment, cottage or house.

This, part of the repair is carried out if, during the repair it became necessary to conduct new electrical wiring or to replace the old, to lay pipes or other communications.

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What this process is used for?

Most often the main purpose of slotting is to give the room an aesthetic look, so that wires and other communications were hidden in the walls and do not even look out.

Therefore, in modern apartments shrewd walls to hide wires here is not a mandatory work when performing repairs.

But, in addition to aesthetic appearance, shrewd walls in the premises helps to properly use their area. by the method of comfortable non-optimal location of openings, furniture, other household items.

Features of the work depending on the material of the walls

The peculiarity of slotting in concrete will be that concrete has a high strength.

Often there is a question: can we draw the netting of bearing walls in a panel house?? You can, but there are certain features.

When making the slot in a load-bearing wall, special attention should be paid to the reinforcement, which is located in the wall. Avoid damaging it, as this could lead to corrosion of the metal and possible weakening of the supporting structures. In order to avoid damaging the armature need to use a metal detector.

In addition, during the assortment of bearing walls of panel houses it is strictly prohibited to make horizontal assortment, as the bearing panel is constantly in a stressed state and any decrease in its section, can lead to the collapse of the floor panel and even the whole house.

If it is nevertheless impossible to avoid the necessity of asshole drilling, holes in bearing walls should be placed only in vertical direction that corresponds to the direction of the stiffening ribs of the panel constructions.

When drilling through the load-bearing walls of panel houses it is necessary to make as few bends of the hole as possible and the length of the channel should not exceed 3 meters.

There are also certain peculiarities when drilling out sand-lime brick walls. Silicate brick is inferior to concrete in strength, and therefore it is easier to make joints in it.

To the peculiarities of drilling out walls of sand-lime brick one should take into account its natural qualities, such as increased absorption of moisture and susceptibility to aggressive media.

Moisture, if it gets on the brick, degrades its insulating properties, and corrosive environments present in the soil, can lead to a reaction with the lime base of the brick and its destruction, which can result in the destruction of the entire building.

In this regard, when patching sand-lime brick walls, special attention should be paid to what would not come into contact with the source of moisture and open soil.

Mitre cutter from an angle grinder with your own hands. Cuts concrete without dust at all.

How to drill a wall without dust worries many when repairing apartments. Who has ever experienced grinding?

Dust-free wall drilling with an angle grinder and wet cut water

Concrete sawing with an angle grinder wet cut.

Methods of drilling out walls with their own hands

Ways to drill a wall, depending on the tools used when making a hole. Let’s take a closer look at what you can ream the wall.

A tool for potholing:


The most widespread way of drilling is with the tool.

To make a hole peoratorom, you need to prepare it for work and pick up the necessary attachments it can be: Strobier, auger or shovel. The tool must be adapted to the type of wall.

Before you start drilling, you must plug in the tool and wear safety glasses, and check that the tool is firmly connected to the wall.

After that, switch the tool in a mode of drilling with impact, take the tool with two hands on the handles and point the tip at the place where you want to make a hole. While drilling, hold the peorator firmly and push it toward the wall.

Usually the process of drilling with the motor is realized by gradually making a groove of necessary width and length in the wall.

If the material is particularly durable, you can hollow out two holes side by side and connect them, which, although it will slow down the process of drilling, but allow it to continue.

It is necessary to monitor the heating of the body and make stops for cooling, as well as for lubrication of the drill bit tips.

angle grinder

Grinding with an angle grinder is quite common due to its availability and inexpensive price.

In order to begin grinding angle grinder to mount a special diamond disc to work on the concrete and connect to a power source.

concrete, angle, grinder, dust

Be sure to wear safety glasses and check the protective guard, which would be a jet of crushed material and dust that is thrown angular grinder,

Angle grinder should be directed along the chosen line of the wall in order to get the desired size and direction of the joint. To create a scribe rotating disc angle grinder should be slowly directed to the desired location and by pressing it to the wall to make a groove of the required size.

See also  What does a small corner grinder look like. What are the corner grinder?

Then make another trench parallel to the one made before and pick out the material left in between with the rotary hammers using the spatula.

Do you know how to make an interior arch with your own hands? Read this article.

Chisel cutter

The process of making a scribe hole with the scribe cutter is similar to how it is done with an angle grinder. The difference is that the chisel has two blades, which makes it possible to insert two chutes in the wall, and that the distance between the blades can be adjusted.

But, in this case, too, the material left between the troughs,

Hammer and chisel

Hammer and chisel are used for making chinks in soft materials, which include almost all types of plaster.

To hollow out the wall with a hammer and chisel, you need to take a hammer in one hand and a chisel in the other, and, putting the chisel to the right place of the wall, hit it with a hammer, resulting in a hole in the wall.

By creating potholes in this way and expanding them in the desired direction and size it is possible to create an internal groove.

The dimensions of the groove, such as depth and width are determined by the size of the cable or pipe, but can not exceed 30% of the width of the wall.

How to get rid of dust?

To combat dust in the course of shtrobing, various methods are used:

    The most common and affordable way to combat dust is to wet the surface on which to make the chisel.

In this article, we reviewed the basic methods and tools for shrewdness of walls. As you can see this process is not very complicated, the main thing is to observe the safety rules.

Basic rules and restrictions when piercing

During the formation of new channels for wiring, the master must necessarily adhere to the following rules:

  • Drilling is carried out only vertically or horizontally. It is strictly forbidden to make diagonal or zigzag cuts.
  • Do not form deep channels in supporting walls and ceilings. The optimum values are 25mm.
  • The length of one continuous chink must not exceed 3 m.
  • When shrovneling pitched surfaces (attic walls) channel must be placed so that it was parallel to the junction of the two surfaces.
  • The distance from the gas pipe to the furrow must be at least 40 cm. It is also forbidden to make vertical ducts.
  • It is obligatory to draw a detailed plan of the location of the cable trays in the walls. This will allow you to refresh your memory of the course of wiring in case of an emergency or the need for a new repair.
  • The distance of lines for wiring from windows and corners must be at least 1.5 m.
  • Keep a distance of 15 cm from the slabs to the horizontal channels.

When laying the cables, they must not intersect with each other. If such wiring is done, only as an exception and in minimal quantities.

Order of cutting concrete

Determining the type of concrete

Before you saw with an angle grinder concrete, you need to determine what type of concrete you are dealing with. This is because each type of material requires a different type of diamond blade. For example, it may be reinforced with metal bars (reinforced concrete).

If the depth of cut is about 10 centimeters or deeper, you may run into a metal lattice (reinforcement cage) on “your way”. As mentioned above, there are special discs for this purpose.

In addition, it should be taken into account that over time, the structure of the material changes. Fresh concrete is more abrasive, while old concrete is harder. For this reason diamond discs for old and fresh material must be different.

If you have time, you can study the structure of the material in more detail, which will allow you to choose the most appropriate tool for it. For example, if there is basalt or quartz in the composition, it will quickly dull the wheel. Therefore the diamond segments must be bound with a soft material so that the new diamonds “break in” more quickly.

It should also be borne in mind that the size of the filler affects the speed of cutting. the larger it is, the procedure is performed slower.

Tip! Diamond tools are not only used for cutting, but also for other concrete work. In particular, diamond drilling of holes in concrete or grinding with diamond cup discs are often used.

In the photo: Laser welded diamond wheel

Choice of wheel

When selecting a disc, keep in mind that the segments can be attached to the blade in two ways:

  • Brazing with silver m. These discs are widely used in wet cutting.
  • Laser welded. This kind of blade has a high cutting performance and is usually used for dry cutting.

Also when selecting a disc, it is important to check that the diameter and the fixing hole of the disc correspond to the technical characteristics of the angle grinder. Also important is the maximum speed of rotation. It is desirable that this disc performance is higher than the maximum speed that the angle grinder is capable of providing.

See also  What circle to cut slapers with a corner grinder. Mechanical tools

Once all of the above parameters have been determined you can choose the most appropriate type of tool for maximum effectiveness.

Concrete angle grinder with segmented disc

Choosing the type of cutting

As a rule, cutting is performed with water, in which case the procedure is dust-free. In addition, water can increase the efficiency of work, as well as increase the resource of the tool. Due to the fact that the process can be uninterrupted, the speed of work will increase. (See chart). Also article Stroebolt cutter for aerated concrete: features.)

However, there is not always a water source near the work area. In this case dry cutting is performed.The dry cutting process must be interrupted, i. e.е. consisting of several cuts.

concrete, angle, grinder, dust

Cutting at

Once the angle grinder for cutting concrete is prepared, you can get to work:

  • The first thing to do is to outline the fishing line along which the cut will be made. It is desirable to fix wooden bars along the line, which will make the cut line even.
  • Then you need to turn on your own hands an angle grinder and perform the cut to a depth of about 0.5. 1 cm.
  • Next, you should remove the bars and make the cut to the desired depth. In the process of work it is necessary to spray water on the blade. If cutting is done dry, the procedure, as mentioned above, must be stopped periodically to allow the tool to cool down.

Please note! Before you start working, you need to protect your respiratory organs with a respirator. In addition, you should also use other personal protective equipment. goggles and gloves.

This is, perhaps, the entire instruction for performing this work.

What is required for the manufacture of nozzles for angle grinder

So, there is a problem to solve, which must be overcome with a minimum of cost.

For this task you will need very simple materials which you probably have on hand.

To remove dust, you need a construction vacuum cleaner or at least the old “Cyclone”, which will perfectly cope with such a task.

Save your nerves, time and finances:

Only qualified experts have a wide arsenal of tools for diamond sawing concrete: a variety of drill bits and cutters, ropes and chain blades, abrasive blades and other special equipment.

Preparing and marking the work surface

First of all, you need to check the walls for old wiring. For this, there are special testers and indicators, the principle of which is based on the general circuit of electricity. It looks like this. from a common breaker to an electrical point, for example, a socket, there are two wires, phase and zero. The phase line carries current from the circuit breaker to the point at all times, regardless of whether something is plugged in or not. The neutral conductor is energized only when the appliance is switched on. And only then goes the current back to the circuit breaker. Indicators are catching the phase wire. Many indicators have a special light bulb on top that lights up when a target is found. This stage of preparation is necessary to protect yourself from electric shock.

Read also: 7812 voltage regulator circuit diagram

After checking it is necessary to draw the future route on the wall. from the junction box to each point of connection.

Before starting work, be sure to drape doorways with a damp cloth or building film. Do not rely on a tightly closed door. small particles of dust will still find a loophole.

Types of housings

The hood for the sanding attachment Types of equipment for angle grinder, which perform the task of collecting and removing dust, are quite numerous.

Manufacturers are aware of the problem and solve it by making special devices for their equipment.

According to the type of functionality two versions are available:

The first looks like the usual protection with a closed housing and a nozzle for a vacuum cleaner. The second option is a closed lid with an outlet for the vacuum cleaner hose. Both types are installed in the usual way on the angle grinder and do not require special tools for installation. Most users are familiar with the common models:

  • Stomper SG-230;
  • Stomper SG-230 R;
  • Bosch 1605510180;
  • Bosch 2605510107;
  • Bosch 2605510224;
  • Bosch 2602025285;
  • Metabo GED125;
  • Metabo GED125 Plus.

Important! To give an exhaustive list of protective guards for angle grinder is impossible, since the model range is constantly supplemented, new developments appear, and the most promising models are improved.

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