Although it seems that drilling a few holes in the wall is easy, drilling concrete, like any other occupation, has its own rules. If the drill and the surface do not match the specifications, the drill quickly breaks and becomes dull, and cracks and chips may appear on the surface of the concrete. Therefore, before drilling, the surface must be carefully prepared, and the appropriate drill should be chosen. Drilling is performed by tools such as:
Diagram of a laser electric drill: 1 - vertical level, 2 - angular level, 3 - horizontal level, 4 - electric drill.
If the diameter of the desired hole does not exceed 13 mm, a perforator is used, and a drill is used for larger holes.
How to drill concrete: general recommendations
The drilling pattern of the concrete wall.
It is required to learn how to properly hold the tool. If it is a drill, it should enter the surface vertically and be straight in the hands. To facilitate the correct position in the hands of the drill during operation, use the included additional handles. The material of the drill and its size are selected individually each time, depending on what type of surface the work is going on. To drill concrete correctly, the material of the drill must be harder than the surface material. For example, wood drills are too soft, so they will not be able to drill through a concrete wall, they will be spoiled before they can complete the work.
To begin with on the wall mark the place in which you want to make a hole. The tool makes at this point a small groove in the slow drilling mode without impact. This will help start drilling, and the drill will not accidentally burst out of the hands, making a hole in the wrong place. Outlining the hole and aiming at it, they add momentum and go into shock mode. Turns are required to build up smoothly, the flow in the wall is also carried out with caution. It is strictly forbidden to turn the tool into the wall, as it is possible to fall with it, losing balance. When using plastic dowels in operation, the hole should be a little deeper than the length of the dowel. Since the work inevitably remains dust and small chips at the very end of the hole, leave a margin of at least 1 cm.Back to table of contents
Concrete drilling: tool preparation
For solid surfaces, which, in addition to concrete, include brick and stone, a carbide drill is required. Masters-experts recommend using pobeditovy drills. In the process of drilling, they do not cut the material, but crumble it, which is best suited for walls made of concrete and stone. But such drills are not designed for wood or plastic, for fibrous materials. In the process, the fibers will break, and the appearance of the resulting hole will be very sloppy. The diameter usually goes up. Thus, pobedit drill does not mean the best. It is impossible to drill them because the sheet will tear before the hole is made.
It is not easy to hold a heavy tool in your hands, as vibration is added to its weight and dust and small parts of the wall fly. You only need to work in a special mask, and you can use a dust collector against dust.Back to table of contents
Surface preparation for drilling
Sharpening the drill for concrete.
The most important step in preparing the wall for drilling is to make sure that there are no electrical wiring on the site, as well as water and heating pipes. If there is no building plan or it doesn’t inspire confidence, you can use a metal detector. This device reacts to iron, steel and non-ferrous metals. In addition to information about where the cables lie, with a metal detector, you can find out exactly what depth is possible to drill on this section of the wall. Drilling through decorative coatings prohibits safety. Any device may give an error and not indicate the presence of wiring or pipes.
Great care is required in concrete block houses; it is strictly forbidden to drill them through the joints between the slabs. All communications, up to the gas pipeline, are located there, although this is prohibited.
If, contrary to all the rules, the distribution of gas pipes in the house is hidden, it is necessary to shut off the gas supply completely before work, as the accident can be very serious.
Another danger is the presence of reinforcement in concrete. This is an important part of the supporting structure, the damage of which is undesirable and leads to inevitable damage to the tool. It is also difficult to find it in concrete, but there are no plans to lay the reinforcement in concrete slabs. Therefore, work should always be done with great care.