When carrying out major repairs in a room, a simultaneous replacement of electrical wiring is often carried out, which can not do without such an element as a crown for concrete sockets. Since new wiring requires new switches and sockets, holes of the required size are drilled under them.
Concrete has distinctive strength and it is quite difficult to work with it, especially when you need to create technological holes. To accelerate the process and simplify labor, a crown for concrete 68 is used.
The work of such a cutting tool when using a hammer or drill. Drilling is also possible on brick and reinforced concrete. Drilling must be carried out in compliance with safety rules, due to this it is possible to obtain symmetrical holes for the socket.
How is the crown
Creating technological holes is a difficult task for the master because of the high strength of concrete, involving the use of a special tool. Drilling with a drill or hammer with a conventional nozzle is not always effective. The way out of this situation are special diamond crowns for socket.
Externally, the tool resembles a small pipe segment, on one side of which there are cutting segments made of carbide material. They fall into the base of the wall when creating the rosettes.
A special flange is located on the other side of the crown, due to which it is connected to a perforator or drill. The tool used must have a large head diameter and high power. These are mainly devices with an electric or pneumatic drive.
Simultaneous use of the crown and the centering special drill, fixed on the general node of the device, is possible. It prevents the malfunction of the cutting main tool.
In the presence of diamond spraying at the edges of the edges, the cutting characteristics and durability are increased at least twice. The standard diameter of the crown for the socket is 68 mm and is suitable for most switches.
Carbide elements
Proper selection of parts will increase the speed and efficiency of work. Particular attention is paid to the reliability and high power of the tool used.
A drill bit for drilling holes in concrete has certain design features. Today, you can find several types of crowns, the most common is the option of carbide metal. Such an alloy is presented in the form of a special soldering that determines durability and reliability. Despite these characteristics, if the crown gets on the reinforcement while drilling reinforced concrete, the soldering just flies out.
Diamond spraying on crowns
In addition to different technological characteristics, there are differences in price. The diamond-coated tool, better than others, simplifies working with hard materials. Such a crown for podrozetniki on concrete makes it possible to create holes with minimal physical and time costs. Despite the relatively high cost, it gained wide distribution due to the possibility of cutting reinforced sections.
Tungsten carbide tool
Such a crown is the most affordable and economical option. It can be used for drilling concrete, ceramic tile and brick bases. Due to the versatility of such a tool, the required work can be done without replacing the nozzles, in addition to convenience, this gives economic benefits, since there is no need to purchase an additional tool.
This crown for podrozetniki on concrete has a special design and a special hexagonal shank located on the back side, due to this, drilling is performed using a tool, which is at least 800 watts. Such a device, unlike a diamond, cannot be used for work on a reinforced concrete base, since when the cutting parts come into contact with the reinforcement, it will fail and will be unusable.
Sockets
The template diameter of the undergrowth is 68 mm, but larger products are also found. In particular, flasks are used for a switch and a socket with a diameter of 75 and 70 mm. This must be considered when choosing a crown. For quality fixation, free space for alabaster mixture should remain in the wall. So, for example, for a 68 mm diameter socket, it is advisable to use a hole with a size of about 72 mm. If in doubt or questions, you should consult with the seller before buying. It should be noted that the solution of alabaster is quick to set, so do not hesitate to install the socket.
Under the standard size of the socket, most of the sockets and switches are available. But there are also devices with a different diameter, so even at the design stage it is necessary to finally determine the materials used and only then buy, focusing on the available budget and wishes.
Assembly
Particular attention is paid to the preparation of the cutting tool. The crown is assembled in accordance with the operating instructions, otherwise unforeseen situations during operation are possible. The assembly begins with the preparation of the drill. It is inserted into the cartridge and is tightly fixed with the appropriate bolts. Then, under the drill, the bowl is fixed by thread. Each tool element must be tightly installed in its place. In case of poor or incomplete assembly, it is possible to break individual elements during operation and to obtain an unsatisfactory result.
Concrete drilling
After complete assembly and verification of the crown, you can begin to work. It is advisable to make the main holes using a punch or a powerful impact drill (if there is none). The use of a conventional drill is not recommended, since the process in this case will become ineffective and take too much time.
Certain marks are put in the concrete base in the designated places, subsequently a centering drill is set on them. Then you can start drilling concrete with a crown. To do this, a drill is installed on the previously made markup and the tool is turned on. It must be kept as even and tight as possible.
Since a large amount of harmful dust is dispersed in the air during drilling, it is necessary to stock up on special construction glasses and a respirator in advance.
The cutting tool is returned to its original state upon completion of work. First, the nozzle must be completely cooled, otherwise the cutting solder may fall off when dismantled. The cutting edge is removed from the punch, from which the existing dirt and dust is removed. You should also remove its middle part, this is easiest to do with an ordinary hammer or metal chisel. After that, the crown for concrete sockets on concrete is completely ready for further use.
What you need to know
It is undesirable to buy too cheap nozzles. They have no advantages besides attractive cost, and already after the first drilling the technological holes most often fail.
It is important when working with tools of this type to observe safety precautions.
Although concrete is a relatively strong material, it is possible to make holes in it as soon as possible without significant effort with the help of a properly selected cutting tool.
To increase the period of operation, you can make holes in the concrete of small diameter around the perimeter of the mounting of the socket with a drill. Due to this, the area of connection between the wall surface and the cutting elements of the crown will be reduced, which, in turn, will accelerate work and protect the tool from damage.