How to properly drill concrete with a hammer drill
Basic rules for working with a hammer drill in jackhammer mode
Even an inexperienced master can hammer the concrete surface with a perforator. To do this, it is necessary to put the tool in the jackhammer mode. A special nozzle in the form of a lance or a blade is inserted into the cartridge.
The hammer drill must be firmly held with both hands, as it vibrates strongly during the chiselling process. It is recommended to use safety glasses while working, not only to monitor the quality of the task, but also to prevent injury. The fact is that small fragments can fly off the concrete and get into the eye.
Key recommendations for working with a hammer drill
To guarantee the maximum quality of concrete chiselling, preventing injuries and premature breakage of the hammer drill, it is necessary:
- do not apply strong pressure on the tool (the speed of work will not increase, but the nozzle will quickly fail);
- use special rubber gloves with anti-vibration inserts, which will prevent the tool from slipping and partially dampen the vibration;
- pause in a large amount of work, since the hammer drill may break if it overheats;
- wear special headphones and take into account the time of day when working with the instrument in the living area, as it emits loud sounds.
Before starting work, be sure to check the serviceability of the power tool, cable and cord. It is recommended to choose nozzles made of high-quality alloys that allow you to work not only with concrete, but also with metal, which is especially important for chiselling reinforced concrete structures. Regular lubrication of the gearbox will significantly reduce the likelihood of breakages, leveling the increased loads on the drill barrel.
After finishing work, it is necessary to thoroughly clean the surface of the rock drill from dirt and dust. Particular attention should be paid to the ventilation holes (clogged, they can cause overheating of the tool). To prolong the life of construction equipment, periodically wet the nozzle with water or machine oil to prevent the temperature from rising.
How to hammer concrete with a hammer drill?
The hammer drill is a popular tool that is powerful enough to work with concrete structures. Its performance allows you to drill or drill into a high-strength surface to prepare it for the next stages of construction and repair work. However, one of the most popular ways to use a power tool is to chisel walls or floors made of BSG.
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How to properly drill a concrete wall: professional advice
05/17/2014 09:33
Quite often, during renovation work, we have to drill a solid concrete base. be it holes for a hanging shelf, a place for a socket or work on installing a new ceiling. And the task is quite difficult, as it might seem at first glance. over, concrete is a very heterogeneous and extremely dense material.
Let’s figure out how to properly and the better to drill concrete at home.
How to drill a concrete wall?
Conventional drills are not suitable for concrete. It is better to use solid carbide drills, for example, victorious. Such drills for concrete have at the ends special brazed inserts made of carbide material (mainly a mixture of tungsten carbide and cobalt in a ratio of 10 to 90%). Carbide tips are easily recognizable. they have the shape of a kind of “house”.
If the holes are planned to be few and they are relatively narrow, then at home you can use a drill with
shock loading function. A hammer drill at home is suitable for holes in concrete with a diameter of no more than 12-13 mm, otherwise it is better to take a more expensive hammer drill. As for a conventional drill (“hammerless”), it is advisable to use it for concrete only as a last resort, if you do not have other working tools at hand.
The hammer drill is suitable for any drilling in concrete. it is more efficient due to its “crushing” function, although it is more expensive than an impact drill. In the hammer drill, the rotation of the drill is combined with its reciprocating movement, which makes the drilling work much faster. The hammer drill is good when a lot of drilling work is foreseen (for example, when you need to fasten the lathing to the ceiling or walls). Please note that the puncher. more powerful than a drill. Therefore, for example, for foam concrete (aerated concrete), it is not suitable, as it will completely “collapse” the wall. And do not overdo it when drilling ordinary concrete with a hammer drill. make sure that the plaster does not fall.
For the hammer drill, special drills (“SDS Plus” and “SDS-Max”) of various diameters are used. from 4-5 mm to 7-8 cm. In order not to buy a very expensive full set of drills, you need to choose drills for a hammer drill according to the diameter of the future dowel. and just in case “plus or minus” a pair of neighboring in size.
In addition to drilling with a hammer drill and hammer drill, there is another way. the so-called diamond drilling. Only for this option you need special drilling rigs and diamond drills. This type of concrete drilling is very expensive, and, as a rule, a team of master repairmen is hired for it. Diamond drilling is used in the case when a lot of repair work on drilling a concrete base is planned, or large holes or longitudinal grooves are needed (for example, when laying communications in a wall or floor). The advantage of this method is that after the drilling rig there is no dust left. it supplies water to the hole, washing away the dust and cooling the drill.
Concrete drilling stages
Before starting work, be sure to think if there are any communications, cables, etc. in this place, so as not to damage anything.
Next, check that there are no old stains and dirt at the drilling site, otherwise clean the surface well.
The outer part of the concrete is usually looser than the inner layers. Therefore, before starting drilling in concrete, be sure to mark and expand the point of the future hole, that is, deepen (cover) the base of the drill entry in this place. This is to ensure that the drill does not slip or move to the side. For the core, you can use a hammer and a large sharp nail, a self-tapping screw or a special dowel.
Hold the working tool in the process of work perpendicular to the concrete base, otherwise there will be an increase in the risk that the drill will break.
If you are drilling a hole with an impact drill, switch modes from time to time. In order to “hit” the surface, turn on the “hit” option in the drill.
As a drill, as well as a drill (perforator) it is necessary to give “rest” from time to time. about once every 10-15 minutes. suspend work.
Still such a moment. the same victorious drills do not like overheating, therefore, with a strong operating load, their tips must be periodically cooled with water.
For concrete work, you will also need a triangular solid steel punch and a regular hammer. suddenly there will be rubble in the concrete. By the way, an old victory drill is also suitable as a punch. If reinforcement or stones (crushed stone) are encountered during the drilling process, they are removed separately. The armature can be processed with ordinary tools (punch and traditional metal drill), but stones lend themselves well only to a punch.
Suddenly, you urgently need to make a couple of holes for the shelf, and only a regular drill (without impact mode) is at hand, then during the drilling process, if necessary, you can periodically insert the punch into the hole and make several blows on it with a hammer, and then turn it in the hole, then. drill again with a drill, etc. Do not forget that the drill itself must be carbide.
Periodically remove cement chips and dust from the working hole. they interfere with drilling. They can be removed with a vacuum cleaner or natural brush.
If the drill is stuck, do not loosen it, but carefully detach the tool, then put on a larger diameter drill and release the stuck tip, being careful not to touch it.
It is necessary to drill holes in concrete 1 cm longer than the length of the dowel, so that the latter will fit into the wall without any problems.
Drill selection
This point can rightfully be considered the main one, since the quality of work and the safety of the drill itself, as well as the accuracy of work, depend on a properly selected drill. Today, there is a huge variety of different drills on the market: for working on wood, metal, concrete. The latter are distinguished by a triangular tip. For a concrete surface, it is best to use a carbide drill, for example, a victory drill. This type of drill crushes the material without tearing it, which is ideal for concrete floors.
If in the process of drilling the wall, the drill does not go forward, encountering a dense area, it is recommended to use a punch. After inserting a punch into the hole, they beat it with a hammer until it starts to move forward and softens the problem area. Then you can continue drilling.
It should be noted that without a punch, a perforator can easily cope with this kind of difficulty, however, it makes holes that exceed 13 mm in diameter. If you want to use universal drills when drilling, you need to remember that they require cooling, vibration off and are only suitable for a conventional drill.
How to drill concrete with a drill?
Each of us has repeatedly faced the need to mount various objects on the walls that add variety to the interior, create coziness, or simply remind us of the pleasant moments of life. Most often, you have to fix lamps and sconces, paintings and photographs, mirrors and shelves to a concrete surface, install an air conditioner, or a TV. If, in the case of a small picture, or a photograph, you can do with driving a nail into the wall, then when the question is about more massive and heavy objects, the question of drilling holes arises. In order to avoid misunderstandings when working with concrete, for example, breakage of a drill, dullness of it, it is worthwhile to competently prepare a partition, choose a quality tool and choose the right drill.
Power selection for drills
The optimal power for working on concrete, in order to drill a hole, is considered to be a power of at least 600 W and 2500 rpm, but this figure must be adjusted depending on the manufacturer’s recommendations so as not to spoil the drill. As already mentioned, concrete “crumbles” when we drill, and this does not require too much speed.
Surface preparation
Before you start drilling, you need to make sure that there are no wiring, pipes, electrical cables in the selected overlap location. A metal detector will help to cope with this task, as it reacts to non-ferrous metals, iron and steel.
If you ignore this condition, you can stumble upon fittings, damage the drill, or cables / pipes that were hidden in the ceiling. If this section satisfies all of the above requirements, then a point is marked on the wall, and then a small depression is made in it at a slow speed using a drill. It is also worth remembering that the surface of a concrete wall is looser than subsequent layers.
Choosing a tool and working with it
When choosing a tool to drill a hole, you should understand that your work depends on it. A good drill accurately drills a concrete wall or other necessary material, simplifies the drilling process, while a bad one will take a lot of time, may not cope with the task, or complicate it. What you need to pay attention to when choosing a drill:
- Is it possible to change the drilling speed? this point is important, since the correction of the speed mode will ensure the accurate operation of the drill, helping it not to damage the surface.
- Is it possible to hammer drill and adjust the depth? hammer drilling can be applied to problem areas, softening them.
- Is it possible to hold the drill with both hands? the drill is not an easy tool and therefore models that are equipped with handles should be preferred.
- Is the power of the tool sufficient for your job??
Having decided on the drill, before starting work, you need to get the hang of it. To do this, take the drill in one hand, like a pistol, place the other hand on the tool handle (if it is not intended by the design, the hand is placed near the cartridge). It is necessary to hold the drill in your hands strictly horizontally so that the hole does not work out with distortions and at the wrong angle. Wait until it reaches the ambient temperature before turning on the drill. Sudden temperature changes can cause condensation. If during work you decide to rest. disconnect the tool from the mains.
A little about the device of the drill and the installation of the drill
A classic drill consists of a power cable, a button, a capacitor wire, a reverse, brushes and springs, an armature, a stator, a gearbox and a chuck, bearings, a key and fastening screws. Correctly inserted drill improves the quality of drilling, and is able to secure it.
The first thing to check when starting to work with the drill is whether there is any dirt on the drill itself. When cleaning drills, a rag will be an excellent assistant. If the drill is loose, there is a risk that it will fly out and injure the master. Accordingly, it is necessary to immerse the drill as much as possible into the chuck (all the way!).
Do not under any circumstances try to “lengthen” the drill by incomplete immersion in the chuck.!
It is important to ensure that the drill in the tool is fixed strictly along the axis. If this rule is not followed, drilling in concrete will be of poor quality, the shape of the hole may be unpredictable, and the cause of all these misunderstandings will be the elementary beating effect of the drill.
Drill errors
- Clothes and gloves should be in size.
Never try to hold the rotating chuck with your hand. there is a drill body for this. Otherwise, you can injure yourself. If you are using gloves. do not take “with a margin”. Mismatched gloves can also get caught in the cartridge and cause injury. Overalls should not dangle. they can be rolled up or pressed with oversleeves.
How to drill a concrete wall: technology features
- 1 Drilling tool
- 2 Drills, drill bits, crowns for concrete
- 2.1 drills for rotary hammer SDS-max, SDS-plus
- 3 How to work with a conventional drill with a victor drill
- 4 Diamond drilling method
- 4.1 diamond drilling technology
- 5 Tips for drilling holes
Walls and ceilings of modern buildings are most often made of monolithic reinforced concrete slabs. It is well known that concrete is a material of increased strength, the handling of which requires knowledge of its processing techniques. In particular, it is necessary to drill a concrete wall with a special tool: a drill or a hammer drill.
Drills, drill bits, crowns for concrete
The choice of accessories is of great importance. The victorious tip is T-shaped. If you want to get a really durable tool, buy drills from domestic manufacturers, where the metal ratio is 9: 1, if you buy a Chinese-made drill, know that there are less hard alloys.
Strength depends on the ratio of its diameter and length. There is a pattern: the longer the drill, the thicker it should be.
Hardened drills are black, while titanium-coated drills are gold. Titanium is much stronger.
Drilling concrete with a drill
For a drill, choose drills with a shank in the form of a polyhedron or a cylinder, for a hammer drill. drill bits marked SDS-plus, SDS-max. Drill bits and hammer drills are not interchangeable: they can be installed on another tool only with an adapter.
| Auger | Designed for making deep passages. Their length can be up to 1 m. |
| Sloping | Allows quick creation of small diameter holes. |
| Spiral | Used for drilling large diameter passes. |
But the fact is that with the help of drills, holes are made only up to 4 cm in diameter. To drill larger passages in concrete, use carbide-tipped concrete drill bits. Their diameter is 35-120 mm. However, the most common crowns are 68 mm in diameter. They are ideal for creating socket holes. Extension cords are commercially available that allow you to make holes deeper than 15 cm.
If a drill is used, tungsten carbide-coated bits should be selected. The ability to work with such crowns is determined by the power of the drill. It must be over 1000 W.
Drilling with crowns is performed with the hammer mode off.
Drilling tool
Impact drill for concrete
The organization of work on the manufacture of holes in concrete requires a special approach, involving the selection of the appropriate tool and special drills (the usual ones are not suitable in this case). The following toolkit is best suited for these purposes:
- Drill selection perforator (hammer drill);
- a victorious drill made of an alloy of tungsten carbide and cobalt;
- diamond drill.
A hammer drill or hammer drill provides a rotary-translational movement of the drill (drill), which greatly facilitates drilling in concrete.
Unambiguously choose a hammer drill if you need to make holes more than 12 cm in diameter.
Some experts believe that in most everyday situations, you can do with a conventional drill that does not have an impact function. But in this case, in order to successfully complete the work, it will be necessary to use a special metal pin, the thickness of which is approximately equal to the diameter of the planned passage. By means of this pin, they “fill” the point of the intended drilling and periodically break the concrete as it sinks into the wall. Several small holes can be drilled with a conventional drill with a victor drill.
How to work with a conventional drill with a victor drill
Diamond drilling in concrete
After all the accessories necessary for the work are prepared, you can proceed to the procedure for preparing the hole itself. Even before starting the procedure. we advise you to familiarize yourself with the following recommendations of specialists:
- When working with a conventional drill, you need to carefully monitor that the drill does not overheat, for which it is periodically cooled in cold water.
- After a little deepening into the concrete, you should use the same pin, which must be inserted into the recess and hit it with a hammer several times (with simultaneous rotation).
- Then drill a little more and repeat the same operations with the pin again.
Avoid overheating of a low-power tool, take breaks from work every 15 minutes.
Diamond drilling method
Before you drill into a concrete wall, for example, for a socket, it doesn’t hurt to familiarize yourself with another effective technique for making holes. We are talking about the so-called diamond drilling, which allows you to quickly enough and without excessive dust to cope with the task. It should be warned that for this you need special equipment, which is a set consisting of an electric motor, a stand fixed to the base, and a drill-crown.
The design of such an installation provides for the possibility of cooling the working tool by supplying water to the drilling site. At the same time, the water washes away the dust, and it does not have time to penetrate into the surrounding space. With the help of a special water vacuum cleaner, also included in the installation kit, the place of work is cleaned.
Security measures
Drilling in concrete is a dusty, difficult and extremely demanding job. It carries, above all, the risk of injury. In addition, drilling walls can violate their strength and integrity, and even during drilling, you can stumble upon communications and damage them or even get an electric shock.
When carrying out work, personal protective equipment should be worn: a respirator, goggles, beads, tarpaulin gloves and special clothing. Work at a height of more than 1.5 m from the surface of the earth is work at a height, therefore, it is necessary to provide the worker with reliable support in the form of scaffolding. It is strictly forbidden to drill walls from a ladder or stepladder.
The punch 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 wiring and junction boxes walled up in the walls are also dangerous. Therefore, before starting drilling, it is necessary to carefully check the surface for the presence of current-carrying wires using an electromagnetic radiation detector.
Cartridge types
There is another difference between rock drills. This is a type of chuck for holding a cutting tool. The chuck acts as a link between the tool and the hammer drill. In order to work efficiently, the clamping device must meet a number of requirements.
For example, a chisel or drill 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 rock drill is capable of delivering. Its shank has a special design for this. The method of fixing the cutting tool in the hammer drill is designated as SDS (Special Direct System).
It should be borne in mind that each mounting system has its own equipment:
- SDS-plus. The torque is transmitted by two symmetrical long splines, and two oval slots fix the shank in the chuck. The shank diameter is 10 mm. This mounting system is used in rotary hammers weighing up to 4 kg;
- SDS-top. The system is based on the same principle as the previous one, but is used for instruments with a higher impact load, which belong to the middle weight group. Shank diameter is 14 mm;
- SDS-max. The torque in this fastening system is already transmitted by three long asymmetric splines. Shank with a diameter of 18 mm is fixed in the chuck with two oval grooves.
Punch device
Any hammer drill consists of two structural systems. electrical and mechanical. The constituent elements of the electrical system are an electric motor, an operating mode switch and electronics, and a mechanical one. crank mechanisms, gears and a tool holder. Both systems are enclosed in a housing that can be plastic, metal or a combination.
A very important part of the hammer drill is the hammer mechanism, which provides the main hammering function of this tool. The impact mechanism by the type of execution can be electro-pneumatic or electromechanical. The first type is now used in most models of rock drills. The use of such a mechanism allows you to obtain high impact energy with a minimum electric motor power.
The shock 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 rock drills, and the second in medium to heavy.
When the rock drill is in operation, the rotary motion of the electric motor is converted by the crank mechanism into the reciprocating motion of the piston. The ram, under the action of the compression present in the cavity between it and the piston, accelerates and transfers its energy through the hammer to the working tool. a drill, crown, chisel, etc.
Preparing the cutting tool for work
When starting drilling, it is necessary to prepare and prepare the working tool. This training includes:
- unscrewing and cleaning the cartridge;
- applying special grease to the inner surfaces of the cartridge;
- the cartridge prepared for work is installed and securely fixed.
Since drilling in concrete is a long and arduous process, it is necessary to constantly monitor that the cutting tool does not overheat. A drill that heats up quickly or makes its way very hard is most likely blunt or improperly sharpened. Before starting work, it is imperative 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 speed. It lasts no more than one minute. During the operation of the punch, there should be no extraneous sounds and vibration. The appearance of smoke or a burning smell will indicate that the hammer drill is not working properly.
Types of punchers
Perforators, like any electric tool, are divided into household and professional:
- household rotary hammers are intended for home use. Basically, they are equipped with an SDS-plus cartridge and have a maximum power of 900 W. Equipment of this type is offered by such well-known companies as Bosch, Skil, Hundai, Black Decker, as well as domestic manufacturers Energomash, Caliber, Interskol, Enkor, etc.
- professional rock drills are able to withstand quite intense loads, work longer without interruption. They have better vibration protection. The most famous manufacturers in this segment are Bosch, Hitachi, Makita, Metalbo, Dewalt.
Depending on the number of operating modes, perforators are divided into:
- single-mode. These rock drills are the simplest and work like an ordinary drill. They can be used to drill holes in wood, plastic or metal surfaces;
- dual mode rock drills are capable of hammer drilling. 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 a concrete or brick wall. Hammer 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 into the hard base due to the high impact force. In order for a tool (crown or drill) to rotate and strike at the same time, it is usually made of very high quality materials;
- tri-mode rock drills can hit without spindle rotation. This mode is also the main one and is called chiselling. In this case, the spindle performs only reciprocating movements. With a perforator in chiseling mode, they perform dismantling work, for example, they remove old tiles, destroy beams, brickwork, chip off plaster, make large holes for utilities, and gouge grooves for electrical wiring. Chisels (chisels) differing in purpose and shape are used as accessories. All types of these consumables have one common property. the ability to open the structure of the stone with a blow, and then wedge it, thus destroying a hard surface.
Workplace preparation
The workplace, first of all, must be well lit and free from unnecessary objects and bystanders. It is necessary to check whether an electrical cable or pipe is hidden in a wall or other work surface. This can be done using a special detector.
The drilling site should be inspected for old dirt. If there are stains, the surface must be well cleaned. Since the outer concrete layer is usually looser than the inner one, before starting drilling, it is necessary to mark and expand the point of the future hole, that is, make a recess for the drill to enter, so that it does not slip and go to the side.
Drill
For drilling in concrete, drills with carbide or diamond tips are used. This tool can be used to make a hole with a small diameter (no more than 14 mm).
DON’T DRILL CONCRETE Until You Watch THIS VIDEO!
They differ from drills in the shape of the shank. Drills are considered a disposable tool, since they cannot be sharpened and are thrown away after their resource has been used up. Their advantage is that they are able to remove concrete chips obtained during the drilling process from the hole. It is advisable to use this tool when drilling deep holes, including through holes. The drill can be used to drill holes with a diameter of 4 to 80 mm.
When drilling holes with a drill, reinforcement poses a certain danger. As a rule, a drill immediately burns out after a direct hit on the metal. If the tool passes tangentially to the reinforcement element, then it simply jams and further drilling becomes impossible. Therefore, for reinforced concrete, it is more advisable to use diamond core bits.
Features of hammer drilling technology
Concrete structures are distinguished by very high strength, reliability and durability, therefore their share in modern construction is constantly increasing. Along with this, it is necessary 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 chuck of the hammer drill, bites into the concrete surface much more easily and with less losses than the drill of a drill. 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 perforator drill makes translational movements with a greater amplitude than the drill of an impact drill. In addition, the hammer blows are more powerful, so it drills the wall easier and faster.
Concrete is a tough material and is 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 fittings and crushed stone. They are the main obstacle in the path of a drill or drill, which can only overcome one of them. That is why drilling holes in concrete surfaces is done with different tools.
Used as a cutting tool:
- drill;
- borax;
- crowns.
A separate category is made up of punches, which are hand tools and perform auxiliary functions. The punch is a metal long trihedron with a pointed end. It is used when the cutting tool rests against the rubble present in the concrete. In such a situation, a punch is inserted into the hole made and hit with a hammer to crush the “pebble”.
Drilling a hole
A drill or drill is placed in the location of the hole and the hammer is turned on. Work begins at a low speed, and then gradually increases it.
In the process of drilling, it is necessary to avoid skewing the cutting tool. There is no pressure on the rock drill. After the hole is filled with dust and concrete particles, the drill is removed and the hole is cleaned.
The main technological stages of drilling holes with a hammer drill
Punch device
Any hammer drill consists of two structural systems. electrical and mechanical. The constituent elements of the electrical system are an electric motor, an operating mode switch and electronics, and a mechanical one. crank mechanisms, gears and a tool holder. Both systems are enclosed in a housing that can be plastic, metal or a combination.
A very important part of the hammer drill is the hammer mechanism, which provides the main hammering function of this tool. The impact mechanism by the type of execution can be electro-pneumatic or electromechanical. The first type is now used in most models of rock drills. The use of such a mechanism allows you to obtain high impact energy with a minimum electric motor power.
The shock 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 rock drills, and the second in medium to heavy.
When the rock drill is in operation, the rotary motion of the electric motor is converted by the crank mechanism into the reciprocating motion of the piston. The ram, under the action of the compression present in the cavity between it and the piston, accelerates and transfers its energy through the hammer to the working tool. a drill, crown, chisel, etc.
Horizontal and vertical models
Perforators have not only different technical characteristics, but also design. Some of them resemble a conventional drill in that their motor is positioned horizontally. This arrangement is the most convenient for drilling holes and allows you to work with very high accuracy. Most rock drills of the light class have a horizontal layout.
Rotary hammers with a vertical motor are more suitable for drilling large holes and chiselling. First, the tool is more compact. Secondly, the vertically positioned engine cools better. Almost all rock drills of the middle and heavy class 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. if it is necessary to chisel.
Crowns
The crowns are a piece of metal pipe, on one end of which there are cutting elements of very high strength, and on the other there is a shank for fixing the tool in the chuck of the hammer drill. The cutting edges of the crowns can be in the form of carbide teeth, “welded” to the metal, or flat with a diamond coating. This tool is used for drilling large holes. It can be used to get holes in concrete with a diameter of 50-450 mm.
Drilling holes with diamond bits is more versatile. These bits have wide cutting segments or a solid cutting surface with diamond (corundum) abrasive. They are used for drilling reinforced concrete with a shock-free method, which protects the bearing elements of structures from vibrations. Diamond bits have a fairly long service life. For example, a bit with a diameter of 200 mm with high-quality diamond segments is capable of processing up to 20 linear meters of concrete with an average degree of reinforcement.
Recommendations for using the punch
When drilling holes with a hammer drill, it is recommended to observe the following rules:
- when drilling hard surfaces, lubricants and coolants should be used;
- before using a long drill, it is first recommended to drill with a shorter bit;
- in order to prevent scattering of porous and loose materials, their processing should be carried out in the drilling mode;
- after drilling 170-180 holes, the drill shank is cleaned of dust, wiped with a dry cloth and lubricated with grease;
- when using a professional puncher, the periods of continuous work and rest are alternated (operating time. 30 minutes, break. 10 minutes);
- a break must be done when a part of the housing is very hot at the location of the gearbox;
- it is strictly prohibited to cool the perforator by lowering it into water;
- it is not recommended to increase the impact force of the perforator by means of increased pressure on the treated surface.
After completing the work, the punch is turned off and cleaned with a soft cloth. If necessary, use a cloth soaked in soapy water.
Workplace preparation
The workplace, first of all, must be well lit and free from unnecessary objects and bystanders. It is necessary to check whether an electrical cable or pipe is hidden in a wall or other work surface. This can be done using a special detector.
The drilling site should be inspected for old dirt. If there are stains, the surface must be well cleaned. Since the outer concrete layer is usually looser than the inner one, before starting drilling, it is necessary to mark and expand the point of the future hole, that is, make a recess for the drill to enter, so that it does not slip and go to the side.
Why you need to drill concrete
The difficulty of drilling holes in concrete is that it has very high strength and therefore is difficult to process. In addition, concrete surfaces are not uniform in composition. They can include metal fittings, crushed stone and other fillers, and this makes work very difficult. A hammer drill is capable of coping with such work, which can drill holes with and without a blow, as well as perform blows without drilling.
Hammer Drill vs Drill | Which is Faster in Concrete?
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 in the processing of concrete, brick or natural stone. Drilling deep and wide holes, gouging channels for wiring, chipping ceramic tiles, removing plaster or punching through masonry. all this can be done with a hammer drill.
A multifunctional tool such as a hammer drill is capable of making holes in concrete of various sizes and for various purposes. Especially often this has to be done in the process:
- suspension of air conditioners;
- furniture installation;
- plumbing installation;
- electrical wiring devices;
- finishing works.
Boers (species)
The difference between a drill and a drill is the mounting method. The tool has a shank made according to the fixing system SDS (SDS), etc. The spiral grooves are shallower and have a smaller pitch. For manufacturing, special hardened tool steel is used.
The drill is equipped with a two- or four-sided cutting insert. The maximum diameter of the hole formed by the drill reaches 40 mm. Depth. up to 800
Variety of concrete drills:
- through. drilling holes of various diameters;
- shallow. used to form a shallow hole;
- spiral. for deep passages;
- screw. deep drilling, the presence of spiral grooves for removing sludge;
- break. used for operations with bulky items.
Drill subspecies. concrete crown.
Crown
It is a tubular product:
- removable or monolithic shank with a fixing system in the hammer drill;
- guide drill;
- a working cylinder that determines the diameter of the hole to be made;
- hard-alloy brazing on the end part, type. diamond spraying.
A concrete crown is performed:
- hole in concrete for a socket;
- under the pipe;
- bundle of cables, etc.
Punching work
Household samples of the tool have two modes of operation. “drilling” and “drilling with impact”. Added a jackhammer function to the professional series.
- create grooves;
- lay grooves;
- cut off ledges, knock down tiles;
- dismantle brick and concrete partitions.
Working with a hammer drill is similar to that of a hammer drill, but there are nuances. The instrument is more powerful, the strike mode is switched on almost immediately. This often causes the drill to move away from the markup point. Therefore, the process starts in the drilling mode. After the formation of the groove, the perforator is transferred to the shock-rotational movement.
ADVICE. Periodic shank lubrication helps extend drill life.
Intense work causes the cutting tool to heat up. The tip may turn blue. Further operation, without cooling, will lead to the destruction of the drill. This fact applies to conventional drills and impact drills. Periodic stop at 10
Helps cool down power tool and torch for 20 minutes.
ADVICE. Moistening with water will help speed up the cooling of the drill on concrete. But the temperature of the metal should not exceed 200
250 ° C. This will be determined by a drop of water applied next to the cutting part. the moisture will foam, a hissing sound will be heard. A change in color to a blue tint is evidence of a temperature rise of up to 300–350 ° C. In this case, oil or gradual cooling in air is used.
- The drill must be securely fixed. it must be inserted into the socket until it stops.
- It is advisable to drill for 3
5 mm deeper than the length of the dowel or plug. In this case, a longer screw or self-tapping screw is used. there will be more expansion and reliable fixation in the wall.
Features of work with a drill
A drill is the most affordable tool at home. But it has a significant drawback. it is almost impossible to drill concrete. In practice, hole formation Ø 6
8 mm deep up to 40
50 mm may take two to three hours.
The process can be accelerated by using an additional device. a punch. This is a metal rod made of durable steel with a hardened tip and a tough butt pad.
- Reaming is carried out with a concrete drill. When significant efforts occur. “the drill rested”, the drill is turned off.
- By means of a punch and a hammer, a series of impacts are applied to the bottom of the hole. Microcracks are formed in the local zone.
- Further destruction is completed by re-boring. If resistance occurs, the punch is again put into operation. The process is repeated until the desired result is obtained.
ADVICE. In the absence of a punch, you can try to drill out the concrete, simulating impact, by giving the drill a short reciprocating motion. Thus, a hole with a diameter of up to 6 mm and a depth of up to 30
Using a hammer drill makes it easier to create a depression in concrete. Combination of impact fracture and rotational fracture to shear microlayers increases productivity.
ADVICE. Start work at low speeds. This will fix the drill at the markup point and create a recess for further drilling.
But, to increase productivity. to increase the depth, drilling diameter and the number of holes, the design feature of the shock-rotating device interferes. Such actions are possible when using a punch.
Stages of work
The technical process of drilling in concrete consists of several stages:
- Preparatory.
- Concrete processing.
Drilling concrete
Most residential multi-storey buildings are constructed from concrete structures. Living in a room, making repairs, you have to make holes to solve various problems. A problem arises. how and how to drill concrete?
There are several options for execution:
- hammer the wall by hand, followed by filling the remaining space with mortar;
- use mechanical devices and cutting tools.
The first method is a thing of the past. Holes in the concrete structure are drilled with a special tool.
Drill
Drill. cutting device for making holes.
- cylindrical shank;
- working part with spiral grooves for chip evacuation;
- cutting part.
The specificity of the drill for concrete is the presence of tungsten carbide soldering. The strength properties of the latter allow it to withstand shock loads that destroy concrete.
The insert looks like a small rectangular plate placed across the cylindrical end of the tool.
The maximum diameter obtained by a victorious drill on concrete does not exceed 12 mm. The minimum is 4 mm. Drilling depth limited to 30
The need for drilling
The need to work with a concrete surface arises:
- the need for fixing furniture (kitchen cabinets) to the wall:
- hanging mirrors, paintings, art installations;
- installation of a floor plinth;
- fastening metal profiles or wooden slats for plasterboard, plywood sheathing;
- installation of a socket box and other work.
What to do when the volume of work is large?
Comparison of holes for diamond drilling and hammer drilling.
To drill a large number of holes, you will need a perforator or a drill with the “impact” mode, as well as drills with victories at the end.
The hammer drill combines the rotational movement with the reciprocating movement, which makes it easy to handle lightweight concrete. For drilling load-bearing partitions made of concrete, a perforator will be the best assistant, since its main purpose is to punch exclusively concrete surfaces.
There are differences between a drill and a hammer drill:
- holes of small diameter (no more than 12 mm) are drilled first;
- a perforator drills larger depressions.
Drilling of the reinforcement caught in the thickness of the concrete wall is performed with drills for metal.
The better to use at home?
Correct Sharpening Angle of the Drill Bit for Drilling in Concrete.
At home, when it is required to make 2-3 holes on the concrete surface, a simple drill without the “blow” mode is quite suitable. For this, as the drills with the victorious are immersed in the wall material, the concrete is knocked out with a strong metal pin (punch), corresponding in size to the diameter of the recess.
In particular, the punch is used when the tool begins to “lock” in the wall. Then the steel pin is installed in the recess and blows on it with a hammer or a sledgehammer, trying to crush overly dense places and deepen the hole further. At the same time, the rod is slightly turned. After that, an ordinary drill is again put into the process.
The manipulations described above are repeated over and over until the desired depth is reached. This method does not differ in speed, although it is quite suitable for making a couple of holes.
Another way is to drill holes in concrete with multi-purpose diamond drills. Their work is noted for high efficiency on metal, concrete and crushed stone. They are attached only to a standard electric drill and other tools without vibration function.
When working with a drill, extreme care should be taken, otherwise it will instantly fail. The advice from professionals here will be as follows: to prevent overheating of the drill, it must be periodically moistened with cold water.
What do experts recommend?
Concrete structures are very durable and difficult to drill. Often you have to rest against the crushed stone, which is an integral part of concrete, with drills.
It is necessary to make holes in concrete when:
- arrangement of furniture;
- facing works;
- additional installation of electrical wiring;
- hanging the air conditioner;
- installation of plumbing fixtures.
How to drill concrete? It is possible to solve the issue of drilling concrete in 2 ways:
- percussion drill or hammer drill with a special drill, called pobeditov;
- diamond drilling.
It is important to note that it is not possible to make a hole in a concrete partition with standard drills. Therefore, for work, it is necessary to prepare drills with brazed plates, which are a high-strength pobeditovy alloy. They will do an excellent job with both brick and concrete. They are not used only for working with soft materials, because they will not be cut, but only crumbled.
How and how best to drill concrete?
Those who live in houses with concrete partitions are well aware of the situation when it is necessary to hang any object on the wall. At such a moment, a quite reasonable question arises: how to drill concrete? Every home craftsman who has encountered this problem at least once has probably solved it for himself. But how much effort did it cost? First, some undertake to test the endurance of the drill, coupled with their own strength. And without getting the desired result, they leave the intention to make a hole in the concrete until the next time. As a result, the tool has to be repaired, and the shelves continue to gather dust in their corner. However, there are ways, you just need to find out for yourself and use them correctly in an emergency.
Concrete wall drill.
Than drilled to a considerable depth?
Anyone who, by occupation, regularly encounters the procedure for drilling holes in concrete, uses special devices for these purposes:
- drilling drive;
- various d drill bits;
- powerful electric motor;
- guide post attached to the base.
Drilling with diamonds provides the opportunity to make depressions with a significant d, of the order of 40 cm. The procedure is fast, efficient, quiet and does not generate a lot of dust. Water flows automatically to the drilled place, which cools the diamond bit and washes away the dust.
Concrete grades M 250. M 500 can be drilled with a diamond drill.
Diamond drilling is unique in that the holes after it are the correct configuration with clear contours, and the inner walls are well polished. Recesses can be made in a variety of protective structures and at different angles relative to the horizontal. The likelihood of chips and cracks on the surface is absolutely excluded. Only the material that gets drilled is destroyed.
Diamond drilling is carried out by specialized companies. And in case of extreme need to make a large hole, you can call masters with special equipment. And it is not at all necessary to purchase a diamond drilling rig for a pair of holes.
So, we found out that for home drilling of concrete surfaces it is quite enough to use a drill and a hammer drill.
For other cases, there are firms that specialize in drilling with large hole diameters.
How to drill concrete: tools, fixtures, tips
Every person who at least once faced the need to make a hole of a certain size in the wall wondered what tools should be used for this. Indeed, it is not so easy to make even the smallest hole by hand without having sufficient knowledge of how to drill concrete and what to use for this. The correctly chosen tool and source material in this matter is very important, because the outcome of the whole process depends on it. Our article will help you understand how to drill a concrete wall.
Special devices
In cases where, during repair work, the wall must be supplemented with an outlet or switch, a different variation of the tool is used. This is a crown that has metal soldering along the entire circumference of its cutting edge. The diameter of the crowns ranges from thirty to one hundred and twenty millimeters, but the standard size is sixty-eight millimeters.
The fact is that a hole of this size must be drilled in the wall in order to install a switch or socket. If you keep wondering what to drill into concrete when using a bit, my answer is that a hammer drill with hammer mode disabled is ideal for this mission. If the wall to be treated is too thick, special extension nozzles can be used.
The crown itself can act as a nozzle, but already for a drill. This variety does not have a soldering, but is coated over the entire area with a sputter consisting of a tungsten carbide alloy. An additional plus of this nozzle is that there is no need to change the tool in cases where it is necessary to drill a wall lined with ceramic tiles. The thing is that such a nozzle fits perfectly, both tiles and concrete.
I want to note that this type of charging can only be used on those models of an impact drill, the power of which is not less than a thousand watts.
Often the work of a rock drill is accompanied by the use of drills, the diameter of which can vary from four to eighty millimeters. Many modern craftsmen are faced with the question of how to choose the right drill diameter.
You can avoid such a situation without much difficulty, because in order not to think about how to drill concrete later, you can immediately purchase a set of special drills when buying a puncher. Naturally, really high-quality kits that allow you to easily drill concrete walls are quite expensive, so I advise you to purchase a drill as needed, in accordance with the diameter of the dowels used.
Concrete drilling tips
Before drilling, it is necessary to carry out some manipulations with the tool. I advise you to carefully check the drill chuck for dirt, which, if found, must be removed as soon as possible using a piece of dry cloth.
If you neglect this condition, then while you are drilling, various problems with the serviceability of the tool may arise. When inserting a drill into the chuck, make sure that it enters at a right angle, and the shank rests against the bottom of the chuck, otherwise the wall will remain intact.
Indeed, the most serious problem that a concrete wall can present is finding the wall on metal reinforcement. Most often, such situations occur when concrete is drilled to a great depth. In this case, the reinforcement is processed with a punch, after which you can continue drilling.
Another option for solving this problem, when, for example, the concrete floor is covered with metal reinforcement, is the use of a drill for metal, which can be easily supplemented with any impact drill.
Due to the fact that you cannot drill for more than fifteen minutes with a home-used tool, a break of the same length must be taken every quarter of an hour. During this break, both the concrete and the tool used are cooled. One of the features of the inclusion of the tool in work on a concrete break after such a break is the treatment of the drill with water. For example, a screwdriver with a water-dampened drill is guaranteed to last longer, having managed a huge number of work tasks.
Often, during the drilling process, the wall begins to crumble from the other side. Simply put, the concrete layer separates the plaster layer from itself. Such processes should be avoided by all means, as they can lead to the fact that the concrete layer will be damaged and the process of its destruction will begin.
To keep the concrete in its original form, it is only necessary to slightly slow down the speed of the tool, thereby reducing the intensity of its impact on the wall. This precaution ensures that the concrete layer of the wall remains intact.
Another nuisance that happens while the drill is working on the concrete layer of the wall is the jam of the drill. Never try to remove it by actively loosening the tool in the wall. Not only will the concrete layer of the wall collapse because of this, but the sting may also break off. the upper part of the tool.
The equipment must be disconnected as carefully as possible, replaced with a drill bit with a smaller diameter and start drilling the concrete around the stuck one. This procedure can take a long time, but it will preserve not only the integrity of the wall, and the operability of the stuck drill after removing it.
So, in our article, we examined in detail how to drill a concrete wall. With the right selection of tools and functional accessories for them, you can easily make holes in concrete. over, this work will be done as efficiently as possible, without extra costs and very quickly.
Tool selection
If you are going to drill a hole in a concrete wall, you need to get ready to work properly. I advise you to start by choosing an instrument. In such a situation, there are only two possible options. an impact drill or a hammer drill. Naturally, a hammer drill will be a preferable solution, because the initial function of this tool is to punch concrete or stone, create holes of various diameters.
A feature of the tool is the ability to create holes of large diameter, while a standard drill cannot cross the threshold for drilling holes with a diameter of more than twelve centimeters. If we are talking about such a non-standard material as foam concrete, it is worth giving preference to a drill, since the wall will be irretrievably damaged if you act on it with a perforator.
A hammerless drill will be completely useless for such work; moreover, the tool may be broken in the process.
Of course, if drilling several holes is such a big necessity, then in the absence of a hammer drill, you can get by with a drill, which will allow you to drill a concrete wall with certain skills. However, if long-term work is expected, then it is still worth purchasing the right tool.
Thus, you will save a lot of time and effort, because you do not have to mess around for a long time in order to drill a wall with a device that is not designed for such heavy loads. If, nevertheless, for some reason you had to use a drill, then it is worth remembering one feature of working with it. use only a victorious drill for concrete, in which the tip is coated with a spray created on the basis of hard alloys.
There are craftsmen who know how to make a hole in concrete with a screwdriver. This is quite possible if you choose a suitable tool, for example, the Milwaukee 2604. With the proper skill, such a device will provide you with both hammer drilling and screwing in. It is quite suitable for all sorts of little things, but it will not work for a large amount of concrete work.