When making holes in materials with increased strength, which include concrete, brick, etc., drills for metal work are useless: their cutting part quickly becomes dull. In such situations, it is better to use a concrete drill, which is characterized by a number of distinctive properties, if you compare it with that used for drilling metal.
Types and parameters of concrete drills
The peculiarity of drills for concrete is that their cutting part is equipped with solders from a special alloy, the hardness of which is very close to the hardness of diamond. Thanks to its unique characteristics this alloy was called "win". Concrete drill bits are the most durable tool for processing this material.
Among concrete drills, there are two main categories:
- a drill for concrete for a drill, the design of which is distinguished by a cylindrical or multifaceted configuration;
- a tool for working complete with a hammer drill, having a cylindrical shank, on which the designation SDS-plus or SDS-max is put.
Home craftsmen often have a question about how to choose equipment and tools for making holes in reinforced concrete structures... To solve this problem, a rotary hammer with concrete drills is optimally suited for impact drill... Drills for this type of drill are often referred to as drills and are classified into three main types:
- screw, with which you can drill holes of considerable depth;
- spiral (they can make holes large diameter);
- shallow, which allow you to get holes that differ in small diameters and depth.
Thanks to such design features Like the bump on the shank, the drills are simply snapped into the tool holder. As a rule, they are chosen by professional builders and execution specialists. installation works to obtain holes with diameters in the range 4–30 mm.
In the event that the question arises of how to drill concrete, having received a hole of a larger diameter, a crown-type tool is chosen. It forms holes with a diameter of up to 12 cm. Core drills for concrete are also divided into several categories:
- diamond drills for concrete in the form of a tube or crown, which are fixed on a solid bar (diamond spraying is applied to the working part of such a tool, which is why it is called a diamond drill);
- Pobedit drills, which have a design similar to diamond ones, but differ from them in the material for making teeth on the cutting part (these teeth are made from Pobedit).
The need for a core drill for concrete arises if it is necessary to prepare seats for electrical outlets and switches, carry out communications and perform other work related to the need to obtain large holes and recesses.
The choice of drill bit for brick and concrete is also determined by the diameter and depth of the holes to be formed. A diamond or victorious drill can have the following diameter to length ratios:
In the above table, you can see a simple pattern: the larger the diameter, the longer the drill length for concrete. This is because a long and thin tool cannot withstand the perceived stresses.
There are several rules that you follow to help you get the most out of your concrete drilling work.
- If you don't know how to drill concrete wall drill, stock up on different drills, including those designed for metal work. Each type of drill is designed for specific work: on brick - to drill a brick wall, on concrete - to form holes in concrete structures, on ceramics - for drilling surfaces finished with ceramic tiles. However, when deepening into the structure of the material to be processed, the tool may rest against the metal reinforcement, then it must be temporarily replaced with an appropriate drill. Some do-it-yourselfers, when making holes in concrete structures, sharpen the drills they use so that they can handle metal as well. However, in order to endow a drill for a drill with such versatility, it is necessary not only to have the appropriate knowledge, but also to have a lot of experience.
- Under no circumstances should the drill bit overheat on concrete be allowed. Take breaks every fifteen seconds and cool the instrument naturally, without using water or any other liquid.
- In the structure of concrete, there are always hard stones, bumping into which, the drill cannot move on. Such a stone must be crushed with a chipper and only after that continue drilling.
- If you need to make a hole in a load-bearing concrete wall or ceiling, it is best to use a hammer drill, which will solve this problem as efficiently as possible.
- To drill a hole in the ceramic covering on the wall or on the floor, you must turn off the impact mode of the drill or punch, otherwise the ceramic tile will simply collapse. When working with such surfaces, it is possible to use concrete drills.
- Inexpensive concrete drills made from not very hard material should be sharpened periodically. For this, you can use the angular grinder on which the diamond disc is installed.
The most popular brands of concrete drilling tools
Drills, which are used to perform work on concrete, on modern market represented by both foreign and domestic brands. Prices for such a tool often depend on the popularity of the manufacturer who made it.
How to choose a concrete drill? It should be understood that higher prices for these products are quite justified if we take into account their guaranteed high quality and long service life.
In the list foreign companies that offer consumers concrete drills High Quality, it is necessary to highlight such manufacturers as:
- Makita;
- Bosch;
- Metabo;
- Stayer;
It should be borne in mind that high-quality products offered by these companies are quite expensive.
Particularly noteworthy is the tool from Bosch, which features a four-spiral design, which allows it to easily remove machining waste from the hole being formed.
Bosch drills of the CYL-9 Multi series are universal and, in addition to concrete, are used for drilling in brick and wood
Among the drills for concrete from domestic manufacturers and companies from the CIS countries and China, products manufactured under the following brands should be distinguished:
- Interskol;
- "Bison";
- "Anchor";
- Uragan, etc.
Mid-range winners provide adequate drilling accuracy, but have a limited lifespan
It should be noted that drills made in China can be reliable if they are expensive enough. It must be well understood that a high-quality tool cannot be too cheap, because only best materials and innovative technologies.
The low cost of individual copies of such drills can be explained by violations technological process their manufacture, which is allowed by individual manufacturers, as well as the use of cheap and low-quality materials. In the modern market, you can also come across fakes, which are difficult to distinguish from original products. There is an opinion among experts that fakes have a darker color, since some stages of their production are performed incorrectly. However, when deciding to choose a drill for concrete, pay attention precisely to the cost of such a tool, which should not be too low.
To save money on the purchase, you can purchase drills in sets, then the price for a single copy will be slightly lower.
Distinctive features of drill bits for concrete
There are several criteria to distinguish a concrete drill from other drilling tools.
Working part shape- Wood drills have the sharpest tip that initial stage processing is pierced into the material.
- The tip of the metal tool is tapered and lacks a pointed part.
- The rather blunt tip of the concrete drills is made of a victor plate.
Drilling with a hammer drill in stone or hard concrete is a rather laborious process. In especially difficult cases, when it is necessary to make a hole in a load-bearing wall or ceiling, it is still better to use a hammer drill (switching it to hammer drill mode). You should not even try to work with a drill when you need to drill holes for fixing the profiles on the concrete floor (during installation false ceiling). You will only waste time and be exhausted.
What are the drill bits for concrete
For work, use drills for concrete and drill bits (drills). The drill for concrete has a standard shank (like conventional drills for metal or wood) and is designed for an impact drill. For rotary hammers, drill bits are designed, which have shanks for SDS-design chucks with a diameter of 10 mm or 18 mm.
A concrete drill is made from a special hard alloy, in addition, it has a soldered tip (made of a superhard alloy based on titanium and tungsten). You can drill with such drills in concrete, brick, marble, stone, ceramics and other similar materials.
- It should be borne in mind that concrete drills should be used exclusively for working with concrete, ceramics, and stone. It is highly undesirable to drill metal or wood with them. If while drilling load-bearing wall the drill will rest against the steel reinforcement, it is better to drill it with a drill for metal, and then continue drilling with a drill in concrete.
- When working with an impact drill, sometimes hard stones can be found in concrete, which the drill does not always "take". In this case, use a special hammer or an old concrete drill and sledgehammer to manually crush the stone. Drilling can then be continued.
- When working with hard concrete, be sure to ensure that the drill does not overheat, allowing it to cool down every 10-15 minutes.
- Sometimes, when drilling a wall, pieces of plaster can fall off from its back side. To avoid this problem, it is enough to reduce the speed. Although the work will go a little slower, you will not have to worry about the safety of the wall.
- To drill ceramic tiles, use a drill for concrete, but set the mode of a conventional drill. In this case, you should not press hard so that the tile does not split.
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 - an unwanted waste of money. To avoid the latter, we have prepared for you an article on the topic: "How and with what to drill a concrete wall?" Let's take a look at all the important points.
How to drill a concrete wallNew or old instrument
Remember, if your wife asks: “how to drill a hole in the wall to install a socket there?”, Then it's time to resort to using a puncher!
Additional Information
To prepare the wall for drilling a large hole, make a small notch in the center of the mark with a thin drill. This will allow you to find a convenient stop with a tool in the future so that it does not slip. 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 installed mounts. For this, a rubber bulb or a can is suitable. compressed air... Mouth blowing is not recommended, as dust will get on your face and eyes (in extreme cases, use safety glasses).
We hope our information resource has helped you, and the question of how to drill concrete will no longer bother you. Good luck!
Concrete is a durable and reliable material. Many, if not most, buildings are constructed of monolithic or precast concrete. Typically gasket holes engineering communications, pipelines, as well as recesses for the installation of electrical and low-current fittings are provided during the molding process concrete structures... But their location often does not suit the owner of the premises, and they have to drill holes in new points. Let's try to figure out how best to do this.
Choosing a tool
Initially, you should determine which tool is better and more efficient to drill a concrete wall. In a global sense, the choice is small - an impact drill or a hammer drill. But there can be many nuances, since the power tool can be of different power and functionality, there are also many attachments for it. Therefore, you should define goals and objectives, and then decide what tool you might need. So:
- In order to screw a small screw into the wall for a picture, a lot of effort is not needed. In this case, you can drill a concrete wall with a conventional drill, equipped with a drill with a victorious tip.
- When a small amount of work is expected, and the diameter of the punched holes does not exceed 12 mm, then an impact drill should be chosen.
- The hammer drill is used to drill holes of large diameters in concrete, as well as any size, but in significant quantities.
The advantage of a hammer drill over a drill, even with an impact function, is not only more power and endurance. This tool uses not only drills of various sizes and qualities, but also drill bits as a working bit. This is the main device than you can drill a hole in concrete for a pipe.
Professional installers, punching large-diameter holes in concrete, use special units, which include:
- high power electric motor;
- sturdy bracket with guide structure;
- drilling drive;
- drill bits with diamond working area.
Such equipment allows you to make a hole or recess in a concrete wall with a diameter of up to 40 cm.
Which will win more effectively or the diamond?
When you need to make only a few holes for a construction dowel, and there is no perforator at hand, then using a conventional drill with a victorious drill is quite realistic. Also, this option is best suited if the work surface is concrete, but made of cellular material. The puncher will destroy it. But when working with a victorious drill, remember that it is short-lived and requires periodic replacement. In addition, such a drill can be "drilled" in concrete. Then he needs to be helped by hand with a punch and a hammer.
Drilling a concrete wall with an impact drill equipped with a diamond drill is much more effective. Diamond drills are slightly more expensive than victorious ones, but they also last longer. And further important point... Unlike a victorious drill, a diamond drill punches holes not only in concrete and stone, but also in ceramic tiles, porcelain stoneware and metal. When working with a diamond tool, it is not scary to stumble upon a reinforcing cage in the wall. It is better to purchase drills in a set, which includes drills of various diameters. It is more profitable than buying them one by one.
When a hole with a diameter of 35 to 120 mm is drilled in the wall, diamond bits are used as a cutting device. They are carbide-tipped steel rings on a diamond-coated work area. For household purposes, crowns with a diameter of 6.8 cm are usually used; holes of this diameter are needed to install electrical outlets and switches.
How to properly drill concrete
Hole punching work, like any other, requires preparation. In addition to tools and accessories, you should stock up on water to cool drills and crowns. Before drilling concrete with a drill or hammer drill, inspect the wall for:
- hidden heating pipelines, water supply;
- electrical wires, cables.
The search is carried out with a metal detector, identify the identified communications along their entire length. Electrical wiring work surface better to turn it off. Further:
- Mark the locations of the future aisles. If holes of large diameter are assumed, then the designation is made along the contour and axes.
- The depth of the hole for the construction dowel is 8-10mm larger than its length.
- For a more accurate result, the concrete must be drilled correctly. This means that the start of drilling should be done at low engine speed.
- After a small depression is obtained, the revolutions are increased and the instrument is transferred to the impact mode.
- If possible, provide a water supply to the drilling site. In the absence of such an option, periodically moisten the drill with water in a previously prepared container.
- If drilling with a drill is carried out in one position of the tool, then when drilling with a crown, the perforator must be slightly wiggled. This way, waste will be easily removed from the resulting hole and the crown will not jam.
The most difficult obstacle that has to be overcome when drilling a concrete wall is the reinforcement cage. The diamond bit cuts steel rods of small diameter on its own. When drilling with a hammer drill, metal drills should be used to counter the reinforcement.
Wear protective goggles and a respirator. It is convenient to vacuum the resulting dust. After every 15 minutes of drilling, give the tool a break for about the same amount of time. To continue working, moisten the drill with water.
Category: Walls and partitions
Our modern housing is increasingly built from monolithic reinforced concrete slabs with increased strength. When arranging such houses, drilling concrete walls causes certain difficulties, and almost everyone House master I came across them, probably giving up this venture. In this tutorial, we will answer the following questions in detail, namely: how to drill a concrete wall correctly how to prepare the surface for drilling and what tools and devices you need for this.
Preparing to drill a wall
Before you start drilling a concrete wall, you need to make sure that there are no plumbing or steam heating pipes nearby. You can check this with a metal detector. it special device, which reacts to such types of metal as: iron, steel, as well as non-ferrous metals. This device It will also help locate conductive electrical cables near the drilling site.
Since a concrete wall is a monolith of metal rods and crushed rock, bonded together with sand and cement, you will need special carbide drills to drill the holes. For these purposes, diamond drills or universal drills are suitable. The reinforcement caught in the wall is drilled with drills for metal.
How to drill a concrete wall with a drill
Usually, a drill for drilling holes in a concrete wall is used if you need to drill 2-3 pieces of small diameter, for example, to hang a picture, a small cabinet or a shelf. If the drill does not have an impact function, then, in addition to the victorious drill, you will also need a hammer and a metal pin (punch) that coincides in diameter with the hole. As the drill is immersed in a concrete wall, from time to time it is necessary to insert the punch into the hole and hit it with a hammer to punch too dense areas, remembering to turn it a little. Having crushed a dense area with a punch, the process of drilling a concrete wall with a drill can be continued further until you get a hole of the required depth.
This rather laborious process can be made much easier and faster if you use an impact drill when drilling holes, but it is better to use it for such work.
How to drill a concrete wall with a hammer drill
Since the main purpose of the hammer drill is impact work when processing hard materials, its use when drilling a concrete wall will be very useful. With the help of an electro-pneumatic mechanism, the perforating drill performs forward impact movements and creates deep and neat holes. The hammer drill differs from the hammer drill in that the main principle is not drilling, but blow. Thus, the process of how to drill a concrete wall with a perforator is much faster and better.
Before you start drilling a concrete wall, mark with a pencil the location of the proposed hole and select a drill of the required diameter. Then a small indentation is made with a punch or by putting the tool in the "drilling only" mode. After that, by setting the hammer drilling mode on the hammer drill, a hole is made to the required depth. At the end of the work, the drill is removed. It is also advisable to remove concrete dust from the hole with a vacuum cleaner.
To drill a concrete wall quickly and efficiently, you can use the tips below:
- a drill is used when it is necessary to drill several shallow holes with a diameter of up to 13 mm, for deeper and wider holes, a perforator or special equipment is used;
- when drilling holes for a plastic dowel, make the depth of the hole 8-10 mm more than the length of the dowel, because after drilling, dust from crushed material remains in the recess;
- so that drilling is accurate, and the drill does not jump over the surface, it is necessary to switch the equipment to the "drilling" mode before starting work without giving the drill high speed... Further, as a small indentation is obtained, you can add revolutions and switch the instrument to percussion mode;
- so that the drill does not break from overheating, it must be moistened with cold water;
- when drilling holes, be sure to wear safety glasses to prevent crumbs from getting into your eyes;
- The resulting dust can be vacuum cleaned by holding it close to the hole while drilling.
Now you know that the holes are deep and tidy. The video below will show you how to drill a concrete wall with a hammer drill.