In modern buildings, as a rule, the walls and ceilings are concrete. Sooner or later it may be necessary, for example, to hang a shelf for a lamp or to repair a wall with plasterboard during repairs, then there is a problem how to drill a concrete wall with a drill.
The drilling pattern of the concrete wall.
The difficulty in drilling can arise due to a number of reasons. First, the structure of concrete panels is non-uniform and they include iron fittings, cement-sand mortars and crushed stone, which leads to difficulty in drilling. Secondly, concrete has high strength and is very difficult to handle.
What are drilled walls of concrete?
Before starting work, it is important to decide which drilling device is better to do the work. The choice, of course, is small, since there are two types of drilling walls:
The puncher will cope better with this work, since its function is precisely punching concrete or stone surfaces. Using this tool, you can make holes of a large cross section, but even the highest-quality hammer drill is not able to drill holes more than 12 cm.
Diagram of the device drill.
But when you need to drill foam concrete walls, the drill will be the best, since the drill will simply crush the surface.
When working with concrete walls, it is categorically impossible to use a hammerless drill, because it will be meaningless, besides, you can spoil the tool.
When there are only a few holes to be made and there is no punch, you should not get it because of this, you can do with a drill. If you have a lot of work, then buying a punch is inevitable.
In the case when it is necessary to work with a drill, it is important not to forget that you need to use a poker drill for concrete and precisely with a tip coated with a carbide compound.Back to table of contents
Diamond drills and other accessories
On the shelves of stores, you can sometimes find a model of ring drills with a diamond tip. Such products are intended for drilling huge holes with a cross section of up to 25 cm. It is important to consider that such devices are expensive, therefore they should not be purchased for home use.
If you need to make a hole under the socket or switch, you can use crowns designed for drilling concrete. The cutting part around the circumference has universal soldering of carbide metals.
Such elements have a cross section from 35 to 120 mm, but products with a cross section of 68 mm are in great demand, since it is the sockets and switches that have it. If you are drilling with a crown, it is important not to forget to turn off the punch blow function. With this device, holes are drilled, the depth of which is maximum 15 cm. If you need a greater depth, it is recommended to use an extension nozzle.
Similar crowns are sold for electric drills. They differ from the previous ones in that instead of soldering they are equipped with a coating of a tungsten carbide alloy. The advantages of such a device is that if the concrete walls are lined with tiles, then there is no sense in replacing the nozzle, as it drills well both tile and concrete surfaces. But we must not forget that such devices can be used for drills with power above 1000 watts.
Most often, drills are used for perforator operation, the cross section of which has limits from 4 to 80 mm. Many are faced with the problem of the correct selection of the diameter of the drill. But the most reasonable when buying a punch device is to purchase a set of drill bits for concrete. But a quality kit costs a lot of money, and therefore it is necessary to select a section the same as that of the dowel designed for this model.Back to table of contents
Practical tips masters
Everyone knows that the concrete wall and all similar structures have strong qualities and are hard to drill, because most often you can stumble upon rubble in the concrete composition from which wall and ceiling structures are made. Holes in concrete slabs during construction are made quite often:
- during finishing works;
- when installing built-in furniture;
- when installing air conditioners;
- at the device of electrodirunding;
- when installing plumbing devices.
During small household repairs, you can do with a simple electric drill, not equipped with a hammer function.
Sharpening the drill for concrete.
To do this, in the process of introducing pobedit drill into the concrete surface, from time to time it is necessary to hollow the concrete with a metal piercer that should correspond to the cross section of the hole. It is used when when drilling an electric drill starts to get stuck in concrete. Then they place the punch in the hole and hit it, using a hammer or sledgehammer, which helps to crush the compacted places and penetrate deeper. But at the same time, the punch needs to be turned slightly, and then you can start working again with an unstressed drill.
These manipulations should be continued until the holes reach the desired depth. This method is very long, but suitable for several holes.
Of course, you can use the universal drills with diamond tips. They will perfectly cope with metal, rubble, and also with concrete structures. But it is important to consider that they are suitable only for an ordinary drill or a device with the vibration mode turned off. Using diamond drills in operation, it should be remembered that they require cooling in the process of work.
But a good drilling effect can be achieved by using a drill punch. Its advantages in combining the functions of rotational motion with reciprocating motion. When drilling with such a drill, the tip of the drill is able to break up the concrete composition, and the drilling process will be the least time consuming.Back to table of contents
A few nuances, how to drill a concrete wall
Before drilling a concrete wall, it is necessary to install a drill bit in the drill chuck. But first it is important to make sure that there are no foreign objects in it. If these occur, they must be removed with a soft cloth to avoid problems during further work. So, installing it in the cartridge, it is important to ensure that it is properly placed - at a right angle and the tail came all the way.
Diagram of the device punch for drilling concrete.
The first difficulty that can occur when drilling a concrete wall is the emphasis on iron reinforcement. In this situation, the reinforcement is punched with a punch and then continue drilling. When working with an electric drill, a metal drill can handle this difficulty.
It is important to note that when working with a low-power device (as it is not designed for continuous operation) it is necessary to allow the drill to rest for 10 minutes after 15 minutes. This time will be enough to cool the device and the concrete wall. Before proceeding to the next work, it is recommended to moisten the drill with water, which will significantly increase its service life.
There are cases when pieces of plaster are chipped off when drilling holes on the other side of the wall. With such problems, it is necessary to reduce the drilling speed to reduce vibration. Of course, work at such a pace will take much longer, but the integrity of the wall will be preserved.
Another problem that may arise when a drill bit is stuck in a wall. In no case should you try to remove it by loosening the tool, since in this way its end can be broken off. In this situation, the perforator is disconnected, a smaller drill bit is inserted into it and the drilled element is drilled out, but try not to touch it.
With proper selection of the device and accessories, you can achieve high-quality holes even in a concrete wall. But first you need to acquire a little practice and theory, then the work will not create trouble.