If you are planning a major overhaul, then most likely you will need new wiring, sockets and switches. In any case, electrical work includes the installation of electrical outlets. Device for drilling helps to speed up the process, but you should pay attention that ordinary drills for metal or wood cannot be used if the house has concrete or brick walls. They will quickly become stupid and it will be impossible to use them. That is why the installation of the outlet causes a lot of problems. However, if you have special tools and accessories, the work will not cause much difficulty.
1 Appointment of electrical crowns
- 1.1 Appearance
2 Main types
- 2.1 Diamond crowns for traversing
- 2.2 Tungsten Carbide Crowns
- 2.3 Crown with carbide nozzles
- 3 Application
Appointment of electrical crowns
To install plug-ins, you must drill a hole. For this and need a special crown. The diameter of the hole depends on its diameter. Large ones are most often used for installing sockets or when laying pipes. With their help, you can drill not only concrete, but also brickwork, artificial and natural stone, etc.
The crown for the underside of the shape resembles a section of pipe with cutting segments at the edges, which are made of hard metal. These segments can penetrate the hardest blocks. On the other side is the flange, it is needed for mounting in the cylinder head.
Some types of crowns for podrozetnikov received the greatest distribution:
- tungsten carbide;
- with carbide nozzles.
Diamond crowns for traversing
Diamond is the hardest of all known materials, its crystals scratch other gems and glass. It is not surprising that diamond crowns are considered to be the most effective. With their help, the work is much easier to perform, so they are widely used both on construction sites and in the repair of an apartment.
They support air coolingthat is the main advantage. Due to through cuts, temperature deformations are excluded. Moreover, they are considered the strongest, as the tipping of the segments is performed by the laser method. Regardless of the intensity of the regime, diamond crowns do not get blunt and do not deteriorate. Unlike wet drilling, dry takes more time, but the cut accuracy and edge cleanliness is much higher, which excludes the possibility of material damage. Such devices can cope even with fittings and are suitable for drilling the most difficult sections. Ideal if you expect a large amount of work.
Depending on the purpose, there are different types of diamond drillings. During production, diamond chips are mixed with a metal powder called a bundle. Diamond segments form from it, which after bake. When drilling materials such as concrete, granite or quartz, use segments of medium hardness, and for drilling soft materials, such as limestone and brick, use hard alloys. Therefore, when choosing, pay attention to the material from which it was made.
With diamond drilling, the holes are accurate and clean. Moreover, diamond drilling does not cause vibrations, due to which cracks are often formed. The only thing that needs to be taken into account: when diamond drilling is necessary to remove the sludge from the cutting zone.
Tungsten Carbide Crowns
Tungsten carbide crowns can drill not only concrete and brickbut also ceramic tiles. This is their main advantage: there is no need to change crowns for different types of work, which saves time.
On the other hand, there are several limitations. The power of the drill should not be less than 800 watts. Moreover, they very quickly fail when used on those areas where there are metal fragments. Therefore, it cannot be said that this type of crowns will solve all your problems.
Crown with carbide nozzles
Crowns with carbide nozzles are most common among home craftsmen. Their price is usually lower than that of others, while they are famous for their durability. The sizes of crowns are very different, starting from 35 mm in diameter to 120 mm. This is enough for most standard jobs.
However, there are limitations: they are not suitable for sections of reinforced concrete. Crowns just fly out during drilling when they hit the rebar.
Works are performed in several stages:
- selection of the size of the crown;
If you want to make a hole under the socket, you need to determine the size of the product for podozetnikov. First you need to know the diameter of the underside. As a rule, the store can help with the choice, so check for what diameter is the crown.
The standard diameter is 68 mm. Outlets, regulators and switches are manufactured for this size. Less commonly used crowns on 70 mm and 75 mm, but they are also found. If the outlet has already been purchased, but you do not know what size of hole to drill, then take a caliper and measure outside diameter.
Before you start using a crown, it must be collected. Bolt the drill bit, then fasten the bowl on the thread. Check that nothing is loose and the parts are firmly seated. Otherwise, there is a chance to break the drill, bowl, or even get injured.
Now you can start drilling concrete. You will need a hammer drill or a hammer drill. An ordinary drill will not work, because you will spend a tremendous amount of time to use it to make a hole in the concrete with the required depth.
First, make a label for the centering drill. Point a drill there and start work. Be sure to wear a respirator and glasses, there will be a lot of dirt and dust around.
When you're done, remove the bit with a perforator and knock out the central part. To do this, you can use a chisel, hammer or drill for punch.
It is important to note that, although Chinese concrete crowns are very cheap, you should not give them preference. They very quickly fail, most often fall off pokladitovye soldering.
A little advice: after drilling, let the crown time to cool down, and it will serve you for a very long time.