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The concrete wall cannot be drilled. Drilling concrete. Used as a cutting tool

Drilling concrete is quite difficult due to its high strength and the presence of reinforcement. The ideal solution will use a hammer drill, but purchasing an expensive tool for small volumes is impractical, and almost every home has a drill.

To make a hole in a concrete wall no more than 12 cm thick, you can use a drill, preferably with an impact function. For other surfaces, choose a hammer drill.

The quality of the work performed also depends on the crown; a regular drill will not work. Need to use the following types products:

1. Impact type gears. For solid walls, varieties made from durable metal alloys are used. You can select attachments with SDS tails. They have one drawback: upon contact with steel, they quickly collapse. Therefore, it is advisable to check the presence of reinforcement in the wall the day before.

2. Diamond – for non-impact drilling in concrete. They have increased strength. The edge has a heterogeneous structure and cutouts; during their manufacture, corundum or diamond chips are sprayed onto the surface.

For household work select drill bits with a length of 10-12 cm; for professional equipment, larger equipment is required. The main advantage of diamond elements is that they are not afraid of contact with reinforcement. You will find a description of the technology in the article.

3. KS-nozzles with a cutting edge coated with crystalline diamond powder. They are used to make holes in walls, including external ones.

Crown selection criteria

For each type of work, different products are produced. They are not cheap, so it is important to buy a part that is suitable for its intended purpose:

1. At the time of purchase, you must clarify whether it is suitable for concrete. There are analogues that are intended only for wooden surfaces;
2. When choosing a gear type, you should carefully examine how the teeth are secured. The service life depends on the planting depth;
3. selected based on the power of the equipment: up to 1,000 W, an option with a cross-section of up to 25 mm is purchased.

To drill concrete wall, you can first use a triangular punch. This is a high strength rod with a pointed end. Before starting, place it at the marked place and hit it with a hammer several times, periodically turning it. You will get a small funnel, continue to deepen it with a drill.

If you feel that the drill has stopped advancing, you should return to the punch. Next, install it in the recess and hit it several times with a hammer, then again make a hole with a drill. The processes are carried out in this sequence until the required depth is reached.

Algorithm for working with a drill

1. First you need to make sure that the device is working properly and the drill is without visible damage. They work with a concrete wall very carefully; the duration of the actions performed should not exceed 12 minutes. If more time is required, the drill must be allowed to cool periodically.
2. To make a recess with less effort, it is recommended to moisten the surfaces with water; this will protect the metal from deformation and make the process much easier. It is strictly forbidden to cool the equipment in a glass with liquid.
3. The routing of electrical wires is pre-determined to prevent damage.
4. A regular electric drill must be installed perpendicular to the wall, otherwise there is a high risk of failure.
5. When using an instrument that has a striking function, periodically switch the “beat” mode to “impact”.
6. If the drill is stuck in concrete, it should not be loosened. To do this, disconnect it, insert a nozzle of a larger diameter and carefully release the tip.

Advice from professionals

1. To make a recess with a length of more than 110 mm and a diameter of 12 mm or more, choose a powerful tool, for example, a hammer drill.

2. To install plastic dowels, you need to drill 1 cm more, since drilling dust and small concrete chips remain inside.

3. Start working at low speeds. This is necessary to prevent the nozzle from moving. The shock mode can only be switched on when a depth of about 2 mm has been passed.

Construction, finishing of premises, repairs, installation of equipment - this is an incomplete list of works, the production of which cannot be done without drilling holes in the walls. Holes are needed for laying communications, power and telephone lines, heating and sewer pipes. And even if you just need to hang a mirror in the hallway, you will have to drill. After all, you can’t drive a nail into a concrete wall.

Electric drill or hammer drill

Concrete itself is a very durable material. In addition, it often contains pieces natural stone, which is added to cement mortar to give extra strength. Drilling such a wall with a regular drill is useless. There are two ways to solve this problem:

• use a drill with a pobedit tip;
• use a diamond-coated drill.

Both a drill and a hammer drill are designed to drill holes. But if the drill simply turns the drill bit or other attachment, then the hammer drill combines the functions of torsion and impact. A drill can be used to drill iron, wood, brick or foam block walls. There are drills that combine the functions of torsion and impact. Their power is enough to drill a concrete wall without a hammer drill with a Pobedit or diamond drill with a diameter of no more than 10-12 millimeters. A hammer drill has more power and is capable of punching larger holes in walls.

Which tool to choose depends on the task at hand. If you need to make a couple of holes in the wall in order to hang a cabinet, then a regular drill with a Pobedit drill will cope with this task.

If you have to work a lot and often, then only a hammer drill will help out. Especially if you need to drill in load-bearing structures with increased concrete strength.

From theory to practice

In order to drill a small hole in a concrete wall, even a hammerless electric drill with a Pobedit drill bit is sufficient. To do this, the drill will need a little help. The hole formed in the wall must be hammered out from time to time with a metal punch pin with a diameter no larger than the hole itself. After making a few blows, you can continue drilling. In this way, alternating drilling with punching, you can make a hole of the required depth. It's long, but quite doable.

For the same task, you can use diamond-coated drills. Then you won't have to hammer anything. You just need to drill into the concrete wall correctly, making sure that the electric drill and drill do not overheat.

A hammer drill with a pobedit drill is the most universal solution where you need to make a large number of holes is not very large diameter.

If, when drilling a slab, the drill hits the reinforcement, you need to change it to a regular one. A pobedite drill bit crushes the material rather than cuts it.

Large diameter crowns

The problem of drilling large holes can arise when laying, for example, sewage or ventilation systems. For making holes of significant diameter, use special nozzles, which are called crowns. Their main difference from drills and augers is that they are hollow inside. This allows you to spend much less energy on drilling. A concrete drill bit is a hollow metal pipe. At one end there are several diamond-coated cutting protrusions. On the other side, a shank is welded for installation in a hammer drill or drill chuck. Crowns are available in various lengths and diameters.

Drilling with a diamond core can also be done manually. But not all such work can be done by hand. Drill a hole in concrete for a large diameter pipe, and even hand tools, impossible. Holes in thick load-bearing walls drill using a whole set of equipment, which includes:

• guide post;
• drive unit;
• electric motor with clamping chuck;
• crown required diameter.

The drilling process occurs as follows. A guide post is attached to the wall. A drive with an electric motor installed on it will move along it. A crown of the required diameter is clamped into the electric motor chuck. Continuously supplied to the drilling site cold water, which cools the tool and prevents dust formation.

Holes drilled in this way have very clear boundaries and a smooth inner surface. It is also important that such installations allow drilling at a certain angle. This allows you to lay communications with minimal damage to the walls.

Settings for diamond drilling They're not cheap, so you shouldn't buy them just to make a couple of small holes in the wall.

Precautionary measures

Of course, anyone can drill a couple of small holes in a concrete wall. Enough to have good drill with impact function or hammer drill, as well as pobedite or diamond drill bit the right size. If you have to pull large-diameter pipes, for example, take a ventilation pipe from gas boiler, then it is better to entrust this matter to professionals. This will allow the work to be completed with the least cost and damage, and will also save the psyche of not only the apartment owner, but also his neighbors.

When drilling concrete walls, do not forget about the means personal protection. To avoid swallowing dust, you need to use a respirator. And special glasses will protect your eyes from small concrete chips getting into them.

Small renovation work periodically become a necessity in every home. Drilling was no exception. To implement it correctly, you need tools, experience and a little time, otherwise it will be an unwanted expenditure of money. To avoid the latter, we have prepared for you an article on the topic: “How and with what to drill into a concrete wall?” Let's look at all the important points.

How to drill into a concrete wall

New or old tool

Remember, if your wife asks: “How to drill a hole in the wall to install an outlet there?”, then it’s time to resort to using a hammer drill!

Additional Information

To prepare the wall for drilling a large-diameter hole, use a thin drill to make a small notch in the center of the mark. This will allow you to later find a comfortable stop with the tool so that it does not slip off. You need to press the drill moderately, without applying significant force, otherwise there is a risk of breaking the drill.

Periodically blow dust out of the hole, this will increase the reliability of the fasteners being installed. A rubber bulb or spray can is suitable for this. compressed air. Blowing with your mouth is not recommended, as dust will get on your face and eyes (in extreme cases, use safety glasses).

We hope our information resource helped you, and the question of how to drill concrete no longer bothers you. Good luck!

Many people live in houses with, and when it becomes necessary to make a hole in them, they encounter serious difficulties.

Don’t despair or be upset if you didn’t manage to hang a shelf, lamp or cabinet right away; read our recommendations and everything will work out.

There are several options with which you can drill into a concrete wall yourself.

Concrete structures are highly durable, so drilling them yourself is quite difficult.

This is due to the fact that to create concrete products crushed stone is used and when you get on it while drilling, the process becomes very difficult.

The need to drill a concrete wall arises quite often; this is necessary for installing shelves, cabinets, air conditioning, mounting a lamp, or during or during the installation of beacons.

There are several ways to solve this problem:

• using a hammer drill or powerful impact drill;
• an ordinary electric drill or screwdriver;
• diamond drilling.

To carry out this work, do not regular one will do drill, it is necessary to purchase tools soldered with pobedit alloy.

It should be remembered that for walls made of relatively soft materials, you cannot use pobedite drills, as the holes will be uneven and the wall will collapse. It is also impossible to work with metal with such a tool.

To create holes of large diameter or , diamond-coated annular drills are used. To use such a tool you must use special installations, they allow you to make holes with a diameter of up to 250 mm.

Since the cost of such equipment is high, it is easier to hire specialists or you can rent it.

The better to drill

As already mentioned, there are several ways to drill through a concrete wall; let’s look at each of them in more detail.

Hammer

When using a hammer drill or impact drill, they must be switched to impact mode, a working tool with a pobedite tip is inserted and it must be directed perpendicular to the wall surface.

If drilling holes takes a long time, then The drill needs to be wetted periodically so that it does not overheat too much.

Once you have drilled to the required depth, you must pull the working tool back without turning off the hammer drill. To clean the finished hole from dust, you need to deepen and pull out the drill several times.

A regular drill or screwdriver

If you do not have the tools described above, then this work can be done using a conventional electric drill or a powerful screwdriver.

Drilling will take more time than using a hammer drill, but you can do it yourself.

In this case, in addition to the drill and drill bit, you will also need a punch. First, a small depression is made at the drilling site using a punch and a hammer.

After this, they insert the working tool into it and begin to drill. If the drill stops, break the hard areas again with a punch and continue working.

Although a regular electric drill or screwdriver is not suitable for working with concrete, if you don’t have a hammer drill, you can make several small holes with these tools, but you need to use a spear-shaped drill with a carbide tip, usually used for tiles.

Diamond drilling

This is the most effective way to quickly and easily make a hole of the required diameter in a concrete wall.

To perform the above work, you will need special equipment consisting of the following elements:

1. electric motor;
2. a stand that is securely fixed to the base;
3. core drill.

There is no need to cool the drill during operation, as water is supplied to it, which not only cools the tool, but also prevents dust from forming.

If specialists work, then together with the specified equipment they use a vacuum cleaner, with which they remove dust and water.

Because the price of such equipment is very high then buy it for household use inappropriate. If it is necessary to make a hole of a large diameter, you can always invite specialists for this.

In order for you to be able to drill through a concrete wall correctly, you must have necessary equipment, Perform all work carefully and adhere to the following recommendations:

• without a hammer drill, the work can be done with an impact drill or drilled with a screwdriver;
• do not buy cheap drills, as their pobedite tip falls off very quickly and they fail;
• instead of a punch, you can use a pobedite tool, with one you will break the crushed stone, and with the second, inserted into a regular electric drill, you will drill;
• to work with concrete, the hammer drill must have an SDS-plus chuck;
• take into account the placement of the fittings to determine where it is located, you can use a metal detector, if the fittings are exposed, it is necessary to prevent rusting;
• To work with concrete, you can use universal diamond-coated drills, but you need to insert them only into a regular drill, or you need to turn off the impact mode.

Conclusion

When performing the above work, you must adhere to the developed technologies and safety rules, then you can not only make the hole yourself without the involvement of expensive specialists, but also avoid injuries.

Useful video:

How to drill concrete and brick with a screwdriver, video:

In contact with

Concrete is a very strong material with a heterogeneous structure, so it is quite difficult to drill. Today, the most common way to create technological holes in concrete is drilling with a hammer drill. This method allows you to create holes quickly and with good quality.

The difficulty of drilling holes in concrete is that it has very high strength and is therefore difficult to process. In addition, concrete surfaces are not uniform in composition. They may include metal reinforcement, crushed stone and other fillers, and this makes work very difficult. A hammer drill can cope with such work, which can drill holes with and without impact, as well as perform impacts without drilling.

With the help of a hammer drill you can carry out all types of repair and construction work related to hard materials. This tool is trusted for all work on processing concrete, brick or natural stone. Drill deep and wide holes, make channels for laying electrical wiring, chip ceramic tiles, remove the plaster or break through masonry– all this can be done with a hammer drill.

The hardness of crushed stone inclusions in concrete is much higher than the hardness of other fractions

A multifunctional tool such as a hammer drill is capable of making holes in concrete various sizes and for various purposes. This is especially often done in the process:

• air conditioner suspensions;
• furniture installation;
• installation of plumbing;
• electrical wiring devices;
• carrying out finishing work.

Types of rotary hammers

Rotary hammers, like any electric tool, are divided into household and professional:

• household hammer drills intended for home use. Basically, they are equipped with an SDS-plus cartridge and have a power of no more than 900 W. Equipment of this type is offered by: well-known companies, like Bosch, Skil, Hyundai, Black Decker, and also domestic producers Energomash, Kalibr, Interskol, Enkor, etc.;
• professional hammer drills able to withstand fairly intense loads and work longer without interruption. They have better protection from vibrations. The most well-known manufacturers in this segment are Bosch, Hitachi, Makita, Metalbo, Dewalt.

Depending on the number of operating modes, rotary hammers are divided into:

• single-mode. These hammer drills are the simplest and work like an ordinary drill. With their help you can drill holes in wooden, plastic or metal surfaces;
• dual-mode rotary hammers capable of drilling with impact. This mode is the main one for a hammer drill, therefore it is widely used when it is necessary to make blind or through holes in concrete or brick wall. Impact drilling is also called drilling. The effectiveness of this process lies in the fact that the cutting tool installed in the hammer drill very quickly penetrates the solid base thanks to high strength blow. In order for a tool (crown or drill) to simultaneously rotate and perform an impact, it is usually made of very high quality materials;
• three-mode rotary hammers can strike without rotating the spindle. This mode is also the main one and is called chiselling. In this case, the spindle makes only reciprocating movements. Using a hammer drill in chiselling mode, perform dismantling work, for example, they remove old tiles, destroy beams, brickwork, chop off the plaster, make large holes for engineering communications, grooves are made for electrical wiring. The equipment used is chisels (chisels), which differ in purpose and shape. All types of these Supplies unites one thing general property- the ability to use an impact to open the structure of a stone and then wedge it, thus destroying the hard surface.

Three-mode hammer drills are the most versatile, but their cost is also quite high.

Tool weight groups

There are three groups of rotary hammers depending on their weight:

• light hammer drills. This group includes instruments weighing no more than 4 kg and power up to 800 W. The impact energy of such hammer drills rarely exceeds 3 J. This tool is intended for home use;
• hammer drills middle group weigh 4-8 kg. Their power is 800-1200 W, and the impact energy is approximately 10 J. Such hammer drills are classified as professional equipment and can even work with reinforced concrete. Basically, they are used to work in two modes - drilling with impact and just impact;
• to the heavy group include hammer drills weighing more than 8 kg, power from 1200 W and impact energy from 13 J. They are used to make breaks and holes in surfaces made of concrete and natural stone with a diameter of more than 40 mm.

Horizontal and vertical models

Rotary hammers have not only different specifications, but also the design. Some of them are similar to a regular drill, since their engine is located horizontally. This arrangement is the most convenient for drilling holes and allows you to perform work with very high accuracy. Most light-class rotary hammers have a horizontal layout.

For drilling large diameter holes and chiselling, hammer drills with a vertically mounted motor are more suitable. Firstly, the tool turns out to be more compact. Secondly, a vertically mounted engine is cooled better. Almost all medium and heavy-duty rotary hammers have a body shape similar to the letter L. As a rule, horizontal models are chosen for those situations when it is necessary to drill holes, and vertical ones - when it is necessary to chisel.

Types of cartridges

There is one more difference between rotary hammers. This is a chuck type for mounting cutting tool. The chuck plays the role of a connecting link between the tool and the hammer drill. In order for the work to be carried out efficiently, clamping device must meet a number of requirements.

For example, a chisel or auger must be held securely in the chuck and can be tightened and released easily and safely. In this case, the drill must maximally absorb the highest torque and impact force that the hammer drill is capable of delivering. Its shank has a special design for this purpose. The method of fastening the cutting tool in a hammer drill is designated as SDS (Special Direct System).

It must be taken into account that each fastening system has its own equipment:

• SDS-plus. Torque is transmitted by two symmetrical long splines, and two oval grooves secure the shank in the chuck. The diameter of the shank is 10 mm. This system fastenings are used in hammer drills weighing up to 4 kg;
• SDS-top. The system is based on the same principle as the previous one, but is used for tools with higher impact loads, which belong to the medium weight group. The shank diameter is 14 mm;
• SDS-max. The torque in this fastening system is transmitted by three long asymmetrical splines. The shank with a diameter of 18 mm is fixed in the chuck with two oval grooves.

The SDS-max mounting system is designed for rotary hammers weighing more than 8 kg

Perforator device

Any hammer drill consists of two structural systems– electrical and mechanical. Components electrical system are the electric motor, operating mode switch and electronics, and the mechanical ones are crank mechanisms, gears and a tool holder. Both systems are enclosed in a housing, which can be plastic, metal or a combination.

Very important node The hammer drill is a percussion mechanism that provides the main impact function of this tool. The impact mechanism can be electro-pneumatic or electro-mechanical. The first type is now used in most models of rotary hammers. The use of such a mechanism makes it possible to obtain high impact energy with minimal electric motor power.

The impact electro-pneumatic mechanism can be presented in two versions - with a swinging (“drunk”) bearing or with a crank mechanism. The first option is used mainly in light hammer drills, and the second - in medium and heavy ones.

When a hammer drill is operating, the rotational motion of the electric motor is converted by a crank mechanism into a reciprocating motion of the piston. The ram, under the influence of compression present in the cavity between it and the piston, accelerates and transfers its energy through the hammer to the working tool - drill, bit, chisel, etc.

Main technical characteristics

One of the main technical parameters hammer drill is the impact energy, measured in joules. The impact force of light models is no more than 1-2 J, and heavier hammer drills can work with an impact force of 8-15 J. The greater the impact force, the larger the diameter of the hole that can be obtained.

If this value is small, then the hammer drill does not work more efficiently than an impact drill. In this case, he will drill a hole, not punch it. As a result, the cutting tool will wear out quite quickly and high performance will have to forget.

Beat frequency

A quantity called impact frequency indicates how many times in one minute the piston strikes the firing pin. The larger this value, the higher the hole drilling speed. The performance of a hammer drill depends on both impact energy and frequency. The most durable and efficient equipment combines both of these parameters harmoniously.

Spindle speed

Depending on the class of the hammer drill, the spindle rotation speed can range from 600 to 1500 rpm. As the productivity and power of the rotary hammer increase, the rotation speed decreases. This is due to the design features of this tool. For productive models, the diameter of the equipment can be quite large. A small-diameter drill has to rotate quickly, and a large-diameter drill has to rotate slowly, otherwise it will wear out very quickly.

Clogged spiral grooves can even jam the tool in the hole.

High speed rotary hammers have quite an impressive weight, which does not make it easier to use at all. In addition, in high-speed models, the spiral grooves designed to remove drilling waste from the work site wear out very quickly. Because of this, the device begins to heat up very much.

Rotary hammers can be equipped with the following additional functions:

• gear shift mechanism. It will be useful when switching from drill to drill and back. After all, these tools work at different speeds;
• drilling depth limiter. With its help, it is easy to determine whether the drill or drill has reached the required mark;
• rotation speed stabilization spindle when load forces fluctuate;
• soft start and a special device for protection against overheating;
• reverse shaft rotation. This function will be needed when the drill gets stuck in the hole being machined;
• anti-vibration system, compensating for the shaking of the hammer drill when drilling, drilling or chiseling;
• dust protection during work;
• locking button, used to secure the hammer drill in operating mode.

As you can see, the hammer drill has whole line advantages compared to other tools that perform similar tasks:

• Firstly, this is the presence of a separate mechanism responsible for the impact. This mechanism gives the hammer the ability to implement three modes of operation, that is, it is capable of simply drilling, drilling with impact, and performing only impact action;
• Secondly, rotary hammers have an SDS system for clamping equipment. Her design features provide reliable fixation of the equipment and its free movement. In addition, installation of equipment in the SDS system does not require the use of additional tools, which significantly saves working time;
• Thirdly, as a result of the first two advantages, the hammer drill is capable of drilling holes in materials that are quite difficult to process, for example, in concrete and natural stone.

Features of hammer drilling technology

Concrete structures are characterized by very high strength, reliability and durability, so their share in modern construction is constantly increasing. Along with this, we also have to solve the issue of effective drilling of concrete surfaces. Most often, a hammer drill is used for this purpose, which has a number of advantages over other tools, for example, an impact drill. The drill, fixed in the hammer drill chuck, bites into concrete surface much easier with less losses than a drill bit. Therefore, using a hammer drill, concrete is drilled much faster.

This result is achieved due to several factors. First of all, a hammer drill has more power than a drill. The rotary hammer drill makes translational movements with a greater amplitude than the drill bit of an impact drill. In addition, the hammer blows have greater force, so it drills into the wall easier and faster.

The rotation speed of the rotary hammer chuck is lower than that of a drill

Concrete is a durable material and not easy to drill. This is due to its structure and the fillers used. The tool used for drilling is forced to deal with dissimilar materials - metal reinforcement and crushed stone. They are the main obstacle in the way of a drill or auger, which can only overcome one of them. That is why drilling holes in concrete surfaces is performed with various tools.

The following are used as cutting tools:

• drill;
• drills;
• crowns

A separate category consists of punches, which are hand tools and perform auxiliary functions. The punch is a long metal trihedron with a pointed end. It is used when the cutting tool rests on crushed stone present in concrete. In such a situation, a punch is inserted into the hole made and hit with a hammer to crush the “pebble.”

Drill

For drilling concrete, drills with a carbide or diamond-coated tip are used. With this tool you can make a hole of small diameter (no more than 14 mm).

Boers

They differ from drills in the shape of the shank. Drills are considered a disposable tool because they cannot be sharpened and are thrown away after their service life is exhausted. Their advantage is that they are able to remove concrete chips from the hole obtained during the drilling process. This tool is advisable to use when drilling holes of great depth, including through ones. Using a drill, you can drill holes with a diameter of 4 to 80 mm.

When drilling holes with a drill, the reinforcement poses a certain danger. As a rule, a drill immediately burns out after a direct hit on metal. If the tool passes tangentially to the reinforcement element, then it simply jams and further drilling becomes impossible. That's why For reinforced concrete It is more advisable to use diamond crowns.

Crowns

Crowns are a segment metal pipe, at one end of which there are cutting elements of very high strength, and at the other there is a shank for securing the tool in the hammer drill chuck. Cutting edges crowns can have the form of carbide teeth, “welded” onto metal or flat with diamond coating. This tool is used for drilling large diameter holes. With its help you can make holes in concrete with a diameter of 50-450 mm.

More versatile is drilling holes using diamond bits. Such crowns have wide cutting segments or a continuous cutting surface with diamond (corundum) abrasive. They are used for drilling reinforced concrete using a non-impact method, which protects load-bearing structural elements from vibrations. Diamond crowns have a fairly long service life. For example, a crown with a diameter of 200 mm with high-quality diamond segments can process up to 20 linear meters concrete with a medium degree of reinforcement.

Serrated bits are usually used when processing concrete with a rotary hammer in hammer mode.

Drilling holes in concrete with a crown

After turning on the hammer drill, the crown begins to perform circular translational movements in the concrete and, as the working pressure increases, moves in the desired direction. During operation, the tool gets quite hot. To protect it from overheating, a cooling system is used.

There are two methods of drilling - dry and wet. In the latter case, the tool coolant is water. It must be supplied continuously and in sufficient quantity. The required volume of water depends on the diameter of the crown and is usually indicated in the instructions. Excess given value makes it difficult to advance the tool, and the disadvantage leads to rapid wear of the cutting segments.

When dry drilling, the tool is cooled by air. Therefore, the crown must be periodically removed from the hole being processed to cool and check its performance. The advantage of the dry method is that drilling can be done anywhere, in structures of any shape and type. But dry drilling can only be done to shallow depths.

When drilling through holes, the drilled concrete remains inside the crown and is removed along with it. When a blind hole is made, the concrete remaining in the center of the drilled circle must be removed by chipping with a chisel or chisel. To speed up the drilling process, you can take out the crown after it has gone a little deeper into the concrete surface and make several holes of the required depth along the contour of the circle using a Pobedit drill, the diameter of which should be equal to the width of the crown segments. Then continue drilling with a crown.

Drilling reinforced concrete

For drilling holes in reinforced concrete regular drills don't fit because they just can't stand it high loads. The most effective way Drilling reinforced concrete today is the use of diamond tools. Using such a tool you can make holes with jeweler's precision corresponding to the specified diameter and depth.

The essence of the technology is that a tool with diamond cutting segments allows you to make holes of different diameters and depths without any damage to the load-bearing elements of buildings. This is precisely the main advantage this method drilling compared to, for example, carbide drills or a jackhammer. When drilling with a diamond tool, the walls do not experience vibrations, so their structure remains in its original form.

Among the advantages diamond drilling It should be noted:

• almost one hundred percent accuracy of shapes and sizes of holes;
• absence of a lot of dust and noise;
• high speed of work;
• possibility of using the tool in hard to reach places and in a wide variety of conditions.

The main technological stages of drilling holes with a hammer drill

Preparation of the workplace

The workplace, first of all, must be well lit and free of unnecessary objects and unauthorized persons. It is necessary to check whether it is hidden in a wall or another work surface electrical cable or pipe. This can be done using a special detector.

The drilling site should be inspected for old contamination. If there are stains, the surface must be thoroughly cleaned. Since the outer layer of concrete is usually looser than the inner one, before starting drilling it is necessary to mark and widen the point of the future hole, that is, make a recess for the drill to enter so that it does not slip or go to the side.

If you plan to work outdoors, you should make sure that the extension cord used is suitable for outdoor use.

Preparing the cutting tool for work

When starting drilling, it is necessary to prepare the working tool. This preparation includes:

• unscrewing and cleaning the cartridge;
• applying special lubricant to internal surfaces cartridge;
• The cartridge prepared for work is installed and securely fixed.

Since drilling concrete is a long and difficult process, It is necessary to constantly ensure that the cutting tool does not overheat. A drill that heats up quickly or is very difficult to make its way through is most likely simply dull or improperly sharpened. Before starting work, be sure to inspect the drill and other tools used.

Before starting drilling, the operating mode is checked. The hammer drill is turned on and checked at idle. This lasts no more than one minute. When the hammer drill is operating, there should be no extraneous sounds or vibration. The appearance of smoke or a burning smell will indicate that the hammer drill is not working properly.

Drilling a hole

A drill or drill is placed at the location of the hole and the hammer is turned on. Work begins at a low speed, and then gradually increases it.

During the drilling process, it is necessary to avoid distortion of the cutting tool. There is no pressure on the hammer drill. After the hole is filled with dust and concrete particles, the drill is removed and the hole is cleaned.

• when drilling hard surfaces Lubricants and coolants should be used;
• Before using a long drill, it is recommended to first drill with a shorter attachment;
• in order to prevent the scattering of porous and loose materials, they should be processed in drilling mode;
• after drilling 170-180 holes, the drill shank is cleaned of dust, wiped with a dry cloth and lubricated with grease;
• using professional hammer drill alternating periods are carried out continuous operation and rest (work time - 30 minutes, break - 10 minutes);
• a break must be taken when the part of the housing at the location of the gearbox becomes very hot;
• cooling the hammer drill by lowering it into water is strictly prohibited;
• It is not recommended to increase the impact force of the hammer drill by increasing pressure on the surface being processed.

After completion of work, turn off the hammer drill and clean it with a soft cloth. If necessary, use a cloth soaked in soapy water.

Must be cleaned from dust and dirt ventilation holes hammer drill

Security measures

Drilling concrete is a dusty, difficult and extremely responsible job. It carries, first of all, the risk of injury. In addition, drilling into walls can compromise their strength and integrity, and while drilling, you can stumble upon communications and damage them or even get an electric shock.

When carrying out work, you should wear personal protective equipment: a respirator, goggles, ear plugs, canvas gloves and special clothing. Work at a height of more than 1.5 m from the ground surface is work at height, therefore it is necessary to provide the worker with reliable support in the form scaffolding. Drilling into walls from a ladder or stepladder is strictly prohibited.

The hammer drill must be in good working order. Damage to the insulation of the supply cable is not allowed.. During the drilling process, the cable must be positioned so that it cannot be damaged in any way. Hidden electrical wiring and distribution boxes, walled up in the walls. Therefore, before starting drilling, it is necessary to carefully check the surface for the presence of current-carrying wires using an electromagnetic radiation detector.

Cost of concrete drilling services

The cost of drilling depends on the type of concrete, diameter, shape and required depth of the hole.

Estimated cost of drilling holes with a hammer drill:

Hole diameter, mm	Cost of 1 cm of passage, rub.
	in a foam concrete wall	lightweight concrete	made of reinforced concrete
up to 50	11	14	16
50-100	17	21	28
100-200	27	40	46
200-300	38	82	89
400	93	119	129

conclusions

The main task of a hammer drill is hammer drilling and chiselling. To implement it, the hammer drill has a very reliable design allowing it to easily withstand prolonged shock loads. This tool has great impact force, which allows you to perform work quickly and easily.

It should be noted that The scope of application of rotary hammers with horizontal and vertical engine positions differs slightly. Horizontal models are usually used at home. IN professional sphere They are used for intensive drilling of holes of small diameter and length. Due to their light weight, horizontal rotary hammers can be used suspended for a long time, for example, during installation suspended ceilings or installing doors.

Vertical hammer drills are used for gating and laying pipes. Tools of this class are quite expensive and are used exclusively for highly specialized tasks.

Practical tips for drilling concrete with reinforcement with a hammer drill are shown in the video: