Concrete is often used as a material for the construction of load-bearing walls and floor walls. During repair and finishing work , the need arises for its drilling. The perforator handles this task best, but it is feasible even in its absence. If the number of holes is small, as well as their size, then it is quite possible to cope with an impact drill, choosing a suitable drill bit for concrete.
How to choose
A concrete drill is a cylindrical rod that can be divided into three zones: a shank, a cutting part, a calibrating part. For an impact drill, it is necessary to select a drill bit for concrete with a cylindrical shank. Drills with an SDS shank should not be purchased - they are designed for rotary hammers. The calibration zone determines the size of the future hole. Two spiral grooves in the calibrating part are used for removal of waste material. More precise, stable and productive - concrete drill with grinding profile. Its production technology is quite laborious, hence the higher cost of finished products.
The concrete cutting part of the drill is different from the cutting part of any other drill. It is equipped with a carbide plate that grinds concrete, brick, granite, natural stone. Due to this distinction, the drills are called "victorious". The modern composition of the alloy has changed since the invention, as well as production technology. Initially, fastening was carried out by soldering, recently, world manufacturers have been using highly efficient laser welding technology . Its advantages are reliability of fastening and resistance to thermal effects. The correct angle of the cutting part is 130 degrees.
How to drill concrete with an impact drill
Experts recommend using a hammer drill for drilling concrete and other particularly durable materials. But this tool is quite expensive. In order to drill several holes in the wall, an impact drill is quite suitable. Prepare a metal pin, a hammer, and a small container of water in advance.
Drilling holes in concrete is usually accompanied by heating of the drill, especially if it gets on the reinforcement. Periodically, it must be moistened in water.
1. Mark with a marker or pencil the location of the future hole.
2. Drill a small recess with a conventional drill.
3. Change the conventional drill bit to a concrete drill bit.
4. Set the drill to “shock” mode.
5. Start drilling.
6. After the drill bit enters the wall, turn off the drill, allowing it to cool.
7. Insert the prepared metal pin perpendicular to the wall and apply
several blows with a hammer. In this case, the pin must be slightly rotated.
8. Then use the drill again.
In principle, using an impact drill, it is not necessary to additionally use a pin (punch). But the drilling process with it is faster.
Safety recommendations
- Wear a respirator when working. This will prevent inhalation of dust.
- Eyes from dust and debris will protect special plastic glasses.