Why the drill does not drill concrete

Concrete is called an artificial stone for its high strength. Of particular difficulty for drilling is heavy concrete, which includes a large natural filler - crushed stone or gravel.

Why the drill does not drill concrete: the reasons

It was from concrete that the structures that were the basis for the construction of prefabricated houses of the Khrushchev building were made. These houses and today remain the main type of housing in many cities of Russia.

Modern high-rise buildings are built primarily on monolithic-frame technology, when at first the reinforcement cage of the building is created, which is then poured with the same heavy concrete. Its composition also includes: fine filler - sand, binder - cement and water. The strength of the material depends on the quality of all components and the amount of cement.

Reference! A feature of concrete is the rapid increase in strength for 28 days, and then a slow set over the course of a number of years.

Therefore, the problem of drilling holes in concrete faced by almost all residents of cities.

What should be a drill

For drilling holes in concrete, the best tool is a hammer drill, which was designed to work with highly resistant surfaces. It has increased power and blow function in comparison with a conventional drill, which facilitates the work. The maximum hole diameter is 120 mm.

Attention! For working with light cellular concrete of a porous structure, use an unstressed drill or a screwdriver.

When drilling holes of small diameter up to 10-12 mm in depth, you can use a hammer drill that can easily cope with this task. In unaccented models when working with concrete, the cartridge and nozzle very quickly become unusable. The maximum diameter of the hole when working with a drill - 13 mm.

In addition to perforators in professional construction for holes of large diameters in walls of considerable thickness, drills with diamond crowns, equipped with a water cooling system and a pressure device, are used. The resulting holes are of perfect quality, and all the garbage is a carved concrete cylinder. Such an expensive option is inappropriate for home use.

How to choose a drill

To work effectively, you should choose the right drill. Normal, falling on rubble or rebar, instantly blunt.

Drills suitable for concrete structures:

1. With pobedit tip - the most budget and sought-after option for domestic use. Works subject to the availability of shock function. Have an SDS tail for installation in a drill with a keyless chuck.When working with porcelain stoneware, the tip tips become blunt after drilling 1-2 holes.
2. Diamond coated is the best option. They can work without a shock function, the cost is much higher than the winning ones. Often used by professional craftsmen when a large number of holes are needed.

Diamond crowns - circular nozzles for holes of large diameters of 10-120 mm, for example, under the socket or pipe. To work with a perforator or hammer drill, you must choose a diamond crown with a centering drill, which will prevent it from slipping. Edge crowns has an abrasive structure.

Reference! A special feature of diamond crowns is drilling of reinforced concrete without consequences for the integrity of the crown when meeting with reinforcement.

Tungsten crowns are identical in diamond design, but with a more modest cost. Suitable, including for concrete walls.

How to prepare the surface before work

At first, it is necessary to clearly define and mark with a construction pencil or a small indentation (slowly drilling through unstressed mode) the place of the future hole. A small recess facilitates the start of work, preventing the nozzle from sliding.

Important! You should first make sure that no electric cables, water supply, sewage, or heating pipes pass through the range of the drill.

After checking the state of the perforator and the integrity of the nozzle, perform the following operations:

1. Install the drill bit into the chuck until it clicks.
2. Bring a punch perpendicular to the wall, start gently drilling at low speed, lightly pressing on the tool.
3. Gradually increase momentum and go into shock mode. For low-power equipment, the operating time should not exceed 10-12 minutes.During long-term operation, the drill should be periodically moistened in water to prevent its deformation, and the motor should be protected from overheating, taking breaks to cool it.
4. A stuck drill can be pulled out using a smaller diameter nozzle by increasing the diameter of the hole around the stuck tip.

Concrete dust, which appeared as a result of drilling, is easily collected by a vacuum cleaner.