In "Instrument-24" you can buy products from leading manufacturers - ADTnS, Baumesser, Distar, Diamond Hit, Strong, Milwaukee and so on. Socket boxes greatly simplify repair and construction work. Masters do not need to use auxiliary materials, install unaesthetic external sockets. With crowns, you can quickly and accurately drill a landing hole even in reinforced concrete. Diamond segments also "cope" with bricks, masonry and other materials.

How to choose a crown for a socket

When choosing diamond models, you should pay attention to technology. For example, the micro-impact dry-cut sockets produced by Diamond Hit do not generate dust like equipment that uses soldered-in solders. They work with standard non-hammer drills and drill clean holes for electrical, wiring and more.

If you need to work quickly, on concrete or other hard material, use tools of different classes, Messer diamond models are suitable. This equipment with a hex adapter for connecting different drills, which increases the speed of operations by up to 30% and does not require additional cooling.

When selecting, the nature of the work is also taken into account:

for through holes, niches of small depth, models with a diameter of 6.8-8.2 cm are suitable;

for technical niches - from 8.2 cm;

for electrical wiring - from 1.2 cm.

"Instrument-24" - a wide range and convenient purchases

In the catalog of our website there are many diamond tools with different performance characteristics. "Instrument-24" offers inexpensive models for universal work, "advanced" equipment for efficient work on reinforced concrete and other hard surfaces. Our crowns:

thanks to diamond segments they reduce noise, vibration and are suitable for use in residential buildings;

designed for dry drilling - safe when working near electrical wiring;

are made from durable steel, diamond raw materials and have a long working resource.

To order our products, use the form on the site, call or write to our managers. Delivery of purchases is carried out in Moscow and to the shopping mall, when sent to the regions of the Russian Federation.

Diamond drilling of holes in concrete using special crowns is much more convenient and faster than carving holes for socket boxes with a grinder or with a puncher. This material is devoted to the tools with which diamond drilling of concrete is performed - diamond and pobedit crowns.

From this article you will learn what types of crowns for concrete exist, and how to choose the right size. Also, diamond drilling in concrete and the correct installation of socket boxes in concrete or in a drywall wall (80 and 100 mm) using a concrete crown and a perforator will be fully disassembled.

Types of crowns

Crowns for concrete sockets are classified depending on the standard of fastenings (triangular, hexagonal, SDS Max, and SDS Plus), and according to the material of manufacture.

Based on the materials of manufacture, the following tool is distinguished:

• hard-melting steel crowns;
• diamond crowns for reinforced concrete;
• crowns made of cardiform-tungsten alloys.

The most simple and a cheap option is a metal crown on concrete for Hegel rosettes in a plasterboard wall (80 and 100 mm), on which Pobedit tips are soldered.

Such a tool is well suited for domestic use: it copes with drilling holes in foam concrete and brick, however, with regular drilling of concrete surfaces, it wears out quickly and becomes unusable.

Due to the small resource of work, such a tool is poorly suited for professional use.

Optimal for concrete drilling is diamond drilling of reinforced concrete with crowns coated with technical diamonds and a perforator.

Diamond crowns for concrete, in comparison with metal victorious tools, have the following advantages:

• drilling accuracy in the wall - you will get a hole in the wall of drywall or concrete of the correct geometry, without chips, cracks and other defects;
• the equipment has any penetration depth - while metal equipment and tools can lose their effectiveness with a large penetration into concrete, diamond crowns have the same efficiency throughout the entire thickness of the processed concrete slab;
• versatility - in addition to concrete, diamond equipment can be used without problems for drilling any materials with similar strength characteristics;
• the equipment has a low level of vibration and noise - this is far from the last factor that should be considered when installing a large number of Hegel sockets in apartment buildings;
• drilling with a diamond column is not accompanied by a large amount of dust emitted;
• speed - due to the high functional characteristics of diamond spraying, such a tool performs drilling much faster than mounting a similar hole with a metal nozzle.

Virtually all quality equipment from trusted manufacturers comes with an SDS Plus shank attachment. This shank technology Suitable for all modern lightweight rotary hammers. SDS Plus shanks have a diameter of 100 mm.

The depth of immersion of the shank in the punch chuck is 40 millimeters. The SDS Plus standard for tools was proposed by Bosch about 20 years ago, and most of the leading manufacturers today produce crowns for this type of fastening.

1.1 What size crowns should I use?

The diameter of the crown for the socket boxes is determined based on the dimensions of the body of the socket box, on which the installation will take place. As a rule, all socket boxes are standardized in size 68 and 100 mm, and most of the presented on the market, crowns go precisely for such installation.

Equipment for concrete under the 68th and 100th diameter of the socket from different manufacturers have, oddly enough, a different diameter. In general, the depth and spread of the actual diameter of crowns for 68 mm cases is from 69 to 74 millimeters.

The increased diameter of the crown in relation to the dimensions of the body is due to the fact that the c3m3 socket itself sits in a hole drilled in concrete on a plaster or alabaster mixture, for which it is also necessary to make free space.

There are also crowns for concrete and foam concrete for 80 and 100 mm sockets. Recently, 100 mm sockets have become increasingly popular, a wide range of crowns for which has appeared from all leading manufacturers, such as Bosch, Makita, SDS, Kraftool.

In general, the key rule when choosing a bit for concrete to make a socket with 3m3 100 mm is that its actual diameter is 3-4 mm larger than the diameter of the socket body.

Do not neglect this, as it is much easier to make a hole with additional plaster mortar than to buy a new socket to fit the wrong crown. If you have already purchased a socket and did not ask what its diameter is, then measure it with a caliper.

When choosing a crown for concrete, you need to proceed from what exactly it is required for and what it needs to do. If you need a crown for a single drilling in concrete or aerated concrete, for example, for installing sockets when renovating an apartment, then you can take an inexpensive product made of ordinary carbide steel from a domestic manufacturer without much hesitation - its capabilities will be more than enough.

Such crowns, as a rule, are not particularly durable, and the victorious teeth on them can fly off quite quickly, however, with intermittent use in everyday life, the service life of such crowns is quite long.

The main thing is to follow the basic rules of operation - do not drill too long, allow the bit to cool normally, and process only those materials for which this tool is intended. Good budget manufacturers include domestic firms "Zubr" and "Stayer"

If you require concrete drill bit for professional work for a long time, then preference should be given to SDS Plus standard diamond-coated tools, which have a much greater efficiency and service life than pobedit crowns.

What's more, high-quality diamond drill bits for concrete are remanufactured, so if the tool wears out, you don't need to buy it again. Among the manufacturers of high-quality SDS Plus crowns are Makita, Bosh, Hilti.

2 Installation of socket boxes

You can install socket boxes in a concrete wall without any problems yourself, you just need to get a puncher and a high-quality concrete crown.

It is not recommended to save on crowns, since good products from trusted manufacturers have a very long working life and will last you for more than one year, while consumer-grade Chinese tools, although they are less expensive, become unusable after a few weeks of regular use.

In general, the installation of 68 × 45mm socket boxes can be divided into five stages: preparation, marking, drilling, installation of the socket box, and finishing work.

Installing socket boxes in concrete will require the following tools and materials:

• pencil;
• ruler;
• building gypsum, or plaster mortar;
• putty knife;
• puncher or electric drill;
• crown for concrete;
• level;
• stationery knife;
• container for mixing gypsum mortar;
• Master OK;
• chisel;
• a hammer.

2.1 Preliminary work

Often, the sockets are mounted on the place where the sockets were previously installed. open type, which requires the preliminary dismantling of old sockets.

Before proceeding with dismantling, de-energize the house, unscrew the plugs and disable circuit breaker on the electrical panel, and check if there is voltage at the outlet using a low voltage indicator (electrician's screwdriver). When you are sure that there is no voltage, unscrew the screws that fix the socket cover and remove it.

Next, unscrew the screws that secure the wires that supply current to the outlet and disconnect them. After the wires are disconnected, we unscrew the screws with which the plastic housing of the socket is attached to the wooden base.

The wooden base is usually attached to the wall with one or two dowels, which you need to pull out. Use pliers or a screwdriver for this.

2.2 Marking

With a construction or stationery pencil in place, draw two perpendicular lines so that they intersect at the place where the center of the future hole for the socket should be located.

There are basic rules that electricians follow when determining the place where the socket will be installed:

• the minimum height of the hole above the floor is 30 centimeters (consider the height of the future flooring if you are drilling concrete in a room with unfinished repairs);
• in the kitchen, the Hegel outlet should be placed above the countertops (approximate height 110-120 centimeters);
• if you are drilling concrete for an outlet in the bathroom, then please note that the hole must be removed from washing machine at least 1 meter.

2.3 Drilling in concrete

Install the concrete drill bit on the hammer drill and connect the tool to the mains. To facilitate drilling a hole, if you are not sure of the quality of the tip used, single holes can be drilled around the perimeter of the socket in increments of 5-10 millimeters.

To do this, attach the block socket to the wall, circle it with a pencil, and make holes along the resulting contour using a small-diameter drill bit. to the depth equal to the length socket box.

Further, along the same contour, holes are drilled for dimensions. The bottom line is that the crown will not go through monolithic concrete, but only its individual sections, which will greatly simplify the work and reduce drilling time. The hole for the socket should be such that the dimensions of the body are buried in it by 5-10 mm, since it will be necessary to put the socket on the gypsum mortar.

2.4 Installation of the socket box and completion of work

Installing a socket in drilled hole performed according to the following algorithm:

1. In the upper part, a hole is made with a chisel and a hammer for supplying power wires.
2. If concrete is not amenable to manual processing, an impact hammer can be used.
3. If you are working on foam concrete, then it will crumble very simply, an ordinary chisel will be enough to create a strobe.
4. Take the socket box and use a clerical knife on the back of its case to cut holes for the wires (special slots are provided there).
5. Thread the wire into the socket.
6. Prepare gypsum mortar. His The consistency should be about the same as sour cream. Since the gypsum mortar hardens very quickly, immediately proceed with the installation of the socket.
7. Moisten the hole in the concrete wall with water, and with a spatula or trowel, fill it with gypsum mortar so that the back wall of the hole is completely covered with gypsum.
8. Insert the box and fix it in the desired position (use a level to check if you have sunk the case to the correct depth, it is important that it does not protrude beyond the wall).
9. Fill all side gaps with mortar, and coat the concrete around the socket.
10. Remove the excess solution only after it has completely solidified: for this you can use sandpaper.

2.5 Features of drilling holes for socket boxes using crowns for concrete (video)

In this article, we will discuss in detail the question of how to install socket box on concrete. Having well-written instructions on hand, supplemented by detailed photographs and expert comments, solving this issue will not be difficult for you. is the basis for installation
electrical wiring elements such as sockets, switches, dimmers, and so on, so the quality of its installation must be given special attention.

Basically, all sockets are divided into two main groups:

1. Socket boxes for concrete - used for installation in concrete, brick, foam concrete, aerated concrete, blocks made of expanded clay.The socket box is installed in a pre-prepared hole by fixing it with a solution of gypsum or alabaster.
2. Drywall sockets - are used for installation in drywall, chipboard, various kinds of plywood, LSU sheets. Installation is carried out by fixing the socket box with the help of spacer tabs available on it in a pre-prepared hole. You can find the instructions on our website in the corresponding article.

In this article, we will analyze in detail how the concrete sockets are mounted.

Making markup

Before installing the socket box, it is necessary to mark the location of the future socket or switch, since each installation element has its own installation coordinates.

Some of the standards commonly used by electricians are listed below:

• sockets in living rooms - 30 centimeters from the clean floor (the so-called "euro standard");
• sockets above kitchen worktop- 110-120 centimeters;
• socket above the washing machine - 1 meter;
• switch, walk-through switch, dimmer - 90 centimeters from the finished floor.

However, it is worth noting that these standards are not fundamental and you can edit them as you like, according to your taste and discretion.

Let's start the installation. We measure the required distance from the floor to the planned switch or outlet. If there is no clean floor yet, we add +5 centimeters to our dimensions, on the screed and laminate (linoleum).

For the switch, you can use the technique of measuring by hand. Approach the site of the planned installation, put your hand down, notice a comfortable position. This method allows you to individually fit the switch specifically for you. If several people use the switch, you can take the average length of the arm.

Next, measure the required distance from the wall to the socket. If it is planned to install a switch near the door, then we measure the required distance from its edge, 15-18 centimeters from the edge of the passage arch, excluding the door frame, are considered optimal.

Now, mark all the dimensions with a pencil on the wall.

Markup done.

Making a hole for the socket

All concrete sockets are mounted into the wall using alabaster or gypsum mortar, but before installing the socket, it is necessary to make a hole into which it will be installed. There are many ways in which it can be made. We will consider the three most simple and effective.

Method 1. Crown for concrete socket boxes

The main device for making holes for concrete sockets is a crown for concrete and brick, with a diameter of 70 millimeters.

The standard diameter of the socket is 67 mm, some manufacturers also have a diameter of 68 mm.

Rice. Crown for concrete sockets

According to the diameter of the cylinder, the crown for concrete sockets has victorious teeth, with which it cuts a circle, in the middle there is a victorious drill for centering. The crown is mounted on a hammer drill or an electric drill, and by means of rotation or rotation with impact, a hole is made.

We set aside the wire so as not to damage it when drilling and make a hole.

The crown must be completely sunk into the wall.

To facilitate the drilling process, you can first, in the center of the marking of the future socket, drill a centering hole with a conventional drill bit, in this case it will be much easier for the crown to cut through the wall material.

We take out the crown and bring the resulting hole to the desired depth. This can be done with an impact bit on a puncher or with a chisel and a hammer.

We considered the first option for making a hole for the socket box, in which we used a crown for concrete socket boxes. Consider the following method.

Method 2. Using an impact drill, a puncher and a pobedit drill

In order to use this method, the first step is to outline the socket. Attach it to the wall and outline with a pencil.

Then we go around the perimeter in a circle. The denser and deeper the holes are drilled, the easier it will be to clean the hole from the wall elements later.

Now, the matter remains with a hammer and a chisel or a perforator with an impact bat. We bring the hole to the required size.

Method 3. Making a hole using a grinder (angle grinder)

This method is the fastest of all of the above, but also the most dusty. To explain its meaning, I think, is not particularly necessary. It is particularly suitable, for example, when socket boxes are to be installed in a concrete wall.

The execution process is simple, we take a grinder (angle grinder), and let's go.

We cut all the marked lines: the central cross and the square around the perimeter of the outlined socket. Be careful with the wire.

After everything is cut through, we knock out the squares from the hole with a chisel or beater and bring it to the desired depth. As a rule, the depth of the circle is less than the depth of the socket, so using this method be prepared to knock a little.

We adjust the hole to the size of the socket

After making the hole, we check how the socket enters it. Since the diameter of the socket is smaller than the diameter of the crown, there will be no problems with the width, but you need to look at the depth.

The hole must be brought to such a depth that the socket box falls into it a little, by about 4-5 millimeters. This margin is necessary because, in addition to the socket itself, a fixation solution (gypsum, alabaster) will be placed inside the hole, and some space will also be needed to bend the wire entering the socket.

To facilitate the stages of work following the installation of the socket box, I recommend that you cut the edge from the edges of the hole made. This action can be performed with a knife. Due to the manipulations we have performed, the socket box will be sunk into the hole along with the outer skirt, which will make it possible to install it flush with the wall. This installation feature will allow you to perfectly mount the socket or switch by pressing its metal mounting, and therefore the plastic decorative frame, against the wall as much as possible. As a rule, a non-recessed skirt of the socket box can give a clearance of the socket frame from the wall of the order of 1-2 mm.

Now, you need to bring the wire into the socket, for this we make a small strobe for it at the top of the hole. You can make a strobe using a chisel and a hammer or a perforator with an impact bit. Soft wall material can be crushed even with a chisel. It is used in our example.

The strobe is ready.

The wire should easily fit without interfering with the socket.

Now, turn over the socket. On its back we see specially prepared slots for the wire.

Select the one you want and cut it out with a knife. It is highly desirable to run the wire from the back of the socket, this will greatly facilitate the subsequent installation of the socket or switch and protect the wire from damage.

The hole has been made.

We put the socket on the wire and insert it into the hole.

Nothing should interfere and let me remind you that there should be a margin of 2-3 millimeters in depth for the fixing solution.

Everything fits, everything is checked. We clean the hole from debris and dust and proceed to the preparation of the gypsum mortar.

Preparation of gypsum mortar

To prepare the solution, we need a container for stirring.

For our purposes, we can use:

• building plaster
• medical plaster
• alabaster

Pour a small amount of gypsum into a container.

You should get a homogeneous creamy mixture of medium density.

The resulting solution has a very short time for use, literally after 2-3 minutes the solution will begin to harden very quickly, and after 5 minutes it will no longer be suitable for work.

Installing a socket

Using the resulting solution, we fix the socket in the hole. Before installation, the hole must be well moistened with water. Water acts as a primer and washes away fine dust. We wait until the water is absorbed for 2-3 minutes.

We put the socket on the wire and insert it into the hole. The solution should cover well back wall socket box squeezing out of the slots of the holes.

Align it so that the screws are horizontal to the floor, and the glass itself is flush with the wall or 1-1.5 mm deeper. You can check the installation in depth by applying a level with its even side to the wall diagonally across the socket. The most important thing is that it does not stick out, otherwise there will be a bump, and therefore later there will be problems with installing the socket or switch.

The main fixation has been completed, so we don’t move the glass of the socket box anymore, otherwise the solution will not grab and the socket box will not fix properly.

Now, we make additional fixation by laying the solution in the side gaps between the wall and the socket. It is necessary not only to smear the solution around, but to lay it in the gaps.

And now, you can smear around.

The socket has been installed.

We are waiting for complete drying and only then we remove the excess solution that has got inside the socket box. Dry, it separates well from the plastic.

I want to note that the installation of socket boxes in a concrete wall is carried out similarly to the considered example. The only difficulty here, as a rule, is the manufacture of a hole in concrete, as suggested above, it is better to make it with a grinder (angle grinder), method 3.

The next step is and, you can read the installation instructions on our website in the relevant articles.

If you are interested in more detailed description connection and installation of various electrical wiring elements (sockets with and without grounding, various switches, including backlit, chandelier, lamp, bathroom exhaust fan) you will be interested in .

How to install a double socket

Mounting two sockets in one frame requires the installation of two socket boxes. Let us consider in detail how this type of installation is performed.

Docking among themselves is carried out using a connector (butterfly).

On the side of the sockets there are special grooves into which they are inserted.

Thus, you can assemble a garland of 2, 3, 4, 5, 6 and so on socket boxes.

For our example, we only need two. We do markup. We measure the distance from the floor.

With the help of the level at the desired height, we draw an even horizontal strip.

Now, using one of the three methods outlined above, we make two hole holes.

The difference from the installation of a single socket box is that after making the hole, you need to connect the two holes to each other. This is done so that a connector connecting two sockets fits into the holes. It is ideal to cut through these joints with a grinder.

After making the holes, as in the example of mounting a single socket box, we lower the wire into one of the two holes obtained in the strobe.

The rest of the installation is carried out similarly to a single socket box.

The last point, which is worth paying special attention to, is a strict approach to setting them horizontally when fixing with plaster. It is necessary to plant on a gypsum mortar only with a level, the greater the number of sockets in the chain, the stricter this requirement.

The installation of various electrical wiring elements is described in as much detail and colorfully as possible.

To do the job we used:

Material

• plaster, alabaster
• socket box

Making large holes in the walls with a drill with conventional drills and nozzles does not give a good result, the edges are uneven, the process is laborious. You have to do more than a dozen drillings, then gouge the pieces. Therefore, for drilling for installation electrical sockets use punchers or installations with special crowns for concrete sockets. Less often they are used with a powerful drill (at least 800 W).

These are devices in the form of a segment of a cylindrical pipe with a cutting segmented edging, consisting of 5-16 teeth. The more segments, the more efficient and faster the drilling. The composition also includes a flange (chuck adapter) for attaching to the tool and a centering drill that first penetrates the wall and sets the direction of the main cutting edge.

Due to the design features, the crowns simply and quickly penetrate the surface. Using them, a cavity with smooth edges is obtained in 5 minutes. Nozzles for concrete sockets work well not only with this material, but also with artificial or natural stone, ceramic tiles, brick.

Drilling methods:

• Shock. This method requires a powerful puncher and a special nozzle. The core of the hole crumbles and falls out completely. Not suitable for reinforced concrete walls, as crowns suitable for it do not cope with cutting reinforcement.
• Unstressed. Using a drill or puncher with a crown operating in drilling mode. It differs from shock by the absence of noise and vibration, it allows cutting reinforcing bars. You will learn about the varieties of crowns for concrete and reinforced concrete products from.

Types of crowns

1. Dimensions.

To achieve a good result, it is necessary to choose the right size and diameter of the crown for sockets. The length of the working part is different - from 60 to 550 mm. It is selected depending on the required depth (at least 40 mm, optimally 60-65). The standard diameter is 68, the limit is 74 mm (for nozzles used for other purposes, it can be much smaller or larger). Before buying, it is recommended to clarify the size of the sockets for which you need to drill. If in doubt about the diameter, it is better to choose a larger one. In the event of an error, the gap is easy to seal with cement mortar, and it is impossible to insert the socket into a smaller hole.

2. Classification by material.

• Made of hard alloy steel with victorious edges. On the cutting edge of this type are solderings from an alloy of tungsten and cobalt (pobedita). Due to the low price, this is the most popular type of drill bits for socket drilling, especially for one-time work. Disadvantages - soldering is often separated from the cutting edge, it is undesirable to use it on reinforced sections of the wall. But if you follow the rules of safe operation, take breaks, change nozzles - the product will last a long time. It is important to allow to cool before removing, this prevents the soldering from tearing off.
• Diamond-coated (for non-impact method). The cutting edge is coated with industrial diamonds, so they can also be used on reinforced concrete. The hole is perfectly even, without defects at the edges. There are no restrictions on drilling depth for diamond drill bits. The level of noise and vibration is much lower, there are no shock loads. The drilling speed is much faster and the amount of dust is less. Advantage - products are capable of self-healing, wear-resistant. To prolong the service life, areas with reinforcement are best avoided.
• Made of tungsten carbide alloys. They are not suitable for reinforced concrete walls. Upon contact with reinforcing bars, they immediately fail. Advantages - affordable price, can work with a conventional drill. The disadvantage is that they wear out relatively quickly without the possibility of recovery, often require sharpening.

3. Classification according to the type of fastening.

Shank Variations:

• 3-sided.
• 6-sided. This type of fastening, like the previous one, is most often found in household drills.
• SD Plus. The most applicable option, corresponding to the connectors of all modern household models of rotary hammers that work with nozzles equipped with a shank with a diameter of 10 mm.
• SD Max. It is used only in powerful professional equipment for crowns with a shank diameter of 20 mm.
• SD Top.

The selection of a suitable shank depends on the type of tool.

A few tips:

• Start by determining the required diameter and depth of the holes. They depend on the size of the outlet boxes and should be the same with them. The drilling is 1-2 mm wider, which allows you to tightly insert the socket into it.
• The amount of work needs to be taken into account. If it is large, then only diamond-coated options are suitable, carbide ones can only be enough for 3-4 times.
• It is wiser to purchase products from well-known manufacturers (Bosch, Makita). To avoid buying a fake, it is recommended to check with the seller the documents confirming the origin and quality of the goods.
• Before buying, be sure to inspect the nozzle well for the absence of defects, scoring. Spraying should be uniform, durable, not crumble.
• Wood crowns cannot be used for concrete.
• For a drill and a hammer drill, options with different shanks are suitable. In the first case, this is usually a hexagon, in the second, an SDS type connector.

Step-by-step instructions for drilling in the concrete wall of the socket

Procedure for drilling in walls:

• Pick up tools and crowns.
• Apply markup.
• Remove furniture and other things from the room, as the work is associated with abundant dust. Cover heavy objects that cannot be moved with foil.
• Be sure to use the personal protection: goggles, respirator, gloves, overalls.
• Set the drilling mode on the puncher.
• Make holes according to the marking. In the process, do not press on the puncher, do not warp.
• The remaining fragments of concrete should be knocked out with a hammer and chisel.

If drilling is difficult, the tool has little power, then several small holes are first made with an ordinary drill along the entire diameter of the socket. After that, they put on a crown and do the main work.

Price

The price depends on the material, type of cutting edge, manufacturer. If you need a fixture for one or two socket boxes, then you can buy a cheap Chinese drill. Products of domestic manufacturers are more durable. For repeated use, it is better to purchase nozzles of well-known foreign brands.

For one-time work, it is better to buy a tungsten carbide nozzle, for a small volume - a carbide nozzle with a winning edge, for professional equipment - with a diamond coating.

In household work (during redevelopment, major repairs, interior changes), a problem often arises, as in brick or concrete walls make a hole for a socket, switch or pipes to be laid? Ordinary drills for wood or metal in such cases, of course, are not applicable: they will instantly fail. Requires special tools, including drill bits for concrete(according to hole diameter) size.

The shape of this construction device is a hollow cylinder, the upper edges of which have cutting sections for drilling holes with a diameter corresponding to the diameter of the crown. The cutting part can be made of various materials (pobedita, with diamond or tungsten carbide coating) and is much harder than concrete.

The rear side of the cylinder is a closed side, equipped with a fastener - a flange. Flange shapes may vary, which should be considered when buying a tool for a specific drill model.

Since this toolkit is often used to drill holes for sockets, it is called so: a crown for concrete sockets. It is possible to make a hole over 30 mm in diameter using a special crown not only in concrete - a tool with such a nozzle will successfully cope with other types of working materials:

• brickwork;
• concrete with solid filler, having a low, medium or high degree of reinforcement;
• artificial and natural stone

The dimensions of the crown for concrete are determined in accordance with the diameter of the desired hole: it can be the diameter of the socket or the diameter of the pipe.

The scope of crowns is quite wide: in addition to installing switches and sockets, they are used when laying or replacing communication lines or electrical wiring.

Crowns for concrete. What are there?

There is a generally accepted classification that distinguishes several main types of concrete crowns for sockets or other elements. We list the most common:

1. Carbide drill bits from Pobedit- the most popular among home craftsmen for making several holes. Having a lower cost compared to analogues, crowns of this type are distinguished by strength and durability. However, there is also a limitation on the use of drill bits with hard-alloy nozzles (soldering): their use in areas of the working material with a reinforcing structure is excluded due to the possibility of "flying" soldering when it hits the reinforcement elements.

The sizes of such crowns are very different due to the wide range of possible work in normal conditions (for personal household use): the minimum diameter is 35 mm, the larger diameters are in the range of 110-120 mm.

1. Diamond drill bits for concrete drilling, which have technical (industrial) diamond inclusions in their segments, can be used for drilling concrete and reinforced concrete. With the help of such a crown, even the hardest walls can be coped with, including short-term work on metal fittings. Crowns with diamond grit make holes with very smooth walls.

The sizes of diamond crowns vary in a wide range: from 25 -130 mm for domestic work to 600 mm for industrial drilling machines. Quite expensive high-quality specimens (the price varies in the range of 1000 ... 8000 rubles: the thinner the crown and its length, the cheaper it is) justify their purchase when performing a large amount of work, significantly saving time and labor costs. Professional craftsmen who perform large volumes of complex work prefer this type.

1. Area of ​​application of crowns with tungsten carbide coating– making holes not only in brick and concrete, but also in ceramic or tile. The combination of properties and technical characteristics of several types in one tool makes it unnecessary to purchase different crowns and allows you not to change them when performing complex work, which significantly saves time.

The power of a rotary hammer with a hexagonal shank used for working with tungsten carbide drill bits must be at least 800 watts. A serious disadvantage of using crowns of this type is their failure when they meet reinforcing / metal elements in the material.

Concrete hole sizes

For a competent selection of a crown that is suitable in size, you should know the diameter of the hole being made for the socket or other element - for example, for the cross section of pipes or the size of the wire route when laying communications. When purchasing a crown in a store, you should check with a consultant about it. specifications indicated in the accompanying documentation or labelling.

Crowns can be sold as individual tools, as well as special sets of several pieces of various sizes.

Most sockets or switches have a standard outer diameter of 68mm.(with an inner diameter of 60 mm), therefore, 68 mm concrete socket bits are the most popular in use. Less commonly used nozzles are 70 and 75 mm.

For laying communication routes, the most common option is a crown for concrete with a diameter of 300 mm.

The choice of instrumentation is also influenced by its length and the number of segments of the cutting part: 5, 6 or 8 - the larger this indicator, the higher the productivity of the crown. A centering drill is also included in the package of the crown for concrete for socket boxes, the role of which is to fix the crown in the center of the hole being made, preventing it from “walking” in the working material. The center drill needs to be changed frequently as it dulls quickly. The crown for concrete is designed for penetration into the depth of the material up to 1.5 meters.

If necessary, go from the opposite - the outlet has already been purchased, and the size of the hole is unknown - you should measure the outer circumference of the outlet with a caliper. The resulting indicator will determine the diameter required to make the hole.

Of the models of branded manufacturers, Bosch, REMS, DeWalt can be noted, South Korean Arix and Chinese SuperHARD offer acceptable quality and a budget price. Among domestic manufacturers, DISTAR and "" should be distinguished.