Concrete is often used as a material for the construction of load-bearing walls and ceiling walls in construction. During repair and finishing work, it becomes necessary to drill it. A perforator works best with this task, but it can also be done 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: shank, cutting part, calibrating part. For an impact drill, it is necessary to select a concrete drill with a cylindrical shank. You should not purchase drills with an SDS shank - they are designed for rotary hammers. The calibration zone determines the size of the future hole. Two spiral grooves in the calibrating part serve to remove the waste material. More accurate, durable and productive - a concrete drill with a grinding profile. Its production technology is quite labor-intensive, hence the higher cost of finished products.
The cutting part of the concrete drill is different from the cutting part of any other drill. It is equipped with a carbide plate that crushes concrete, brick,granite, natural stone. Due to this difference, the drills were called "winning". The modern composition of the alloy has changed since the invention, as has the production technology. Initially, fastening was carried out by soldering; recently, global manufacturers have been using highly efficient laser welding technology. Its advantages are reliability of fastening and resistance to thermal effects. The correct cutting angle is 130 degrees.
How to drill concrete with an impact drill
Experts recommend using a hammer drill for drilling concrete and other highly 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 hits rebar. Periodically, it must be moistened with water.
1. Mark the location of the future hole with a marker or pencil.
2. Drill a small hole with a regular drill.
3. Change from a regular drill to a concrete drill.
4. Set the drill to "impact" mode.
5. Start drilling.
6. After the drill bit enters the wall, turn off the drill and let it cool down.
7. Insert the prepared metal rod perpendicular to the wall and apply
a few blows with a hammer. In this case, the pin mustrotate a little.
8. Then use the drill again.
In principle, when using an impact drill, it is not necessary to additionally use a pin (punch). But the drilling process is faster with it.
Safety recommendations
- Wear a respirator when working. This will prevent dust inhalation.
- Special plastic goggles will protect your eyes from dust and debris.
