Features of the
Before figuring out individual nuances, you need to understand the general principles of the device. The main part of any rock drill is an electric motor. If it has increased power, then it is mounted vertically. But in structures that do not create significant effort, the engine is placed horizontally. The second option is preferable if you have to work in a confined space. But at the same time, we must not forget about the increased load on the motor and the weakness of cooling. If the designers chose a vertical layout, the cooling will be fine. In addition, this system generates less vibration. Another division is associated with the device of the percussion mechanism.
Almost all modern rock drills are equipped with an electro-pneumatic working part. It delivers powerful hits with relatively low energy consumption. When the engine rotates, the bushing inside the chain receives the force along the chain. The outer sleeve performs synchronously oscillatory movements. The pneumatic system is good because at idle the device turns off by itself.
General requirements and safety precautions
It is important to understand that regardless of the manipulations performed, the hammer drill is not a toy. This is a serious mechanism, and it is also energized. Whatever the purpose, you only need to work with special gloves and goggles. Outerwear is strictly long-sleeved. All buttons, zippers and other similar elements must be fastened all the way to prevent accidental gripping of the drill.
A useful addition for any home craftsman working with a hammer drill will be a shield worn on the cartridge. It will stop the flow of various particles of matter flying from the holes. You should be especially careful wherever there are hidden communications. It is useful not only to familiarize yourself with the drawing, but also to mark the routes of wires and pipe routing on the surfaces themselves. Workers should hold the rock drill with both hands at chest level, it is also helpful to spread their legs slightly to gain more support.
Chasing out a wall for an electrical back box and cable. Also how to get the cables behind coving
It is unacceptable to use such a technique while standing on flimsy and unreliable stairs, on all kinds of boxes, on other props of dubious quality. Of course, the use of a punch in low light is prohibited. When hammering or drilling holes, the tool is directed at right angles to the wall. The slightest misalignment leads to cracking of the cartridge. It cannot be repaired, it can only be replaced.
If a very long hole is to be drilled, it is best to do it in several steps. This way there will be fewer errors, the instrument will last longer, and it will be possible to clean up the channel, thereby reducing the operating time. Important: the perforator does not “like” strong pressure, there will definitely not be any practical benefit from pressing, but breakage is quite likely. If the device is in shock mode, you cannot start it at idle speed. Otherwise, the force usually spent on breaking through the material will break the mechanism.
When it is known that the wall is composed of loose material, it is processed only in the drilling mode. This reduces particle dispersal and saves time on cleaning. But hard surfaces are treated only with the use of a protective lubricant and liquid refrigerant. As soon as the tool has warmed up, it is immediately turned off and not started until it has completely cooled down. This is important even in cases where the deadline specified in the instructions has not yet passed.
It must be remembered that even the best rock drills make a lot of noise. Their use is allowed only from 7 to 23 hours. As soon as the work is over, the tool must be cleaned of dust. Store it strictly in warm and dry rooms. Periodically, the drilling machine must be disassembled and lubricated.
How to prepare for work?
Before doing this or that work, you will have to choose and put the required nozzle.
This means the need:
- remove the cartridge;
- clean it up;
- coat the inside of the cartridge with grease;
- put the cartridge in place;
- block the nozzle by lowering the ring.
How to drill metal?
The correct choice of drill is of great importance here. Surfaces made from hard steel grades must be drilled with cobalt-based alloy drills. Aluminum and other non-ferrous metals are drilled with the longest drills. Most types of metal will have to be pierced with products with a cutting part made of extra strong alloys. Sometimes they use nozzles with a cylindrical shank, installed through a special adapter.
How to chisel walls for wiring?
This machine is even better suited for slitting than a conventional drill. It is much more reliable and quite effective in shock mode. For work, use a steel blade, nozzles with a short and long drill. Strictly according to the selected mowing line, holes are made 2.5 cm deep.The step between them should be from 1 to 1.5 cm.
The spatula allows you to clean the prepared grooves, remove all dirt from there. Tip: To make initially uneven grooves smoother, they are finalized using an angle grinder with a diamond disc. But this method is accompanied by the release of large amounts of dust. You can remove it using an industrial vacuum cleaner. In any case, when the chasing is completed, you will have to ventilate the room.
Actions in different modes
For drilling, the toggle switch is moved to the appropriate position. Turning on the engine at idle speed, apply the nozzle to the place where the hole should be punched. To control the twisting speed of the drill and nozzle, a special trigger is used. Drilling occurs if the rock drill is switched to a different mode. Usually it is denoted by a picture showing a hammer and a drill. Speed adjustments while drilling are rare.
To work in the mode of chiselling the material, the hammer drill is switched to the program indicated by the hammer icon. But that’s not all. you need a bit that can act like a chisel.
Such a nozzle is fixed at the required angle with respect to the surface to be treated. To set the required number of strokes, as well as their strength, the trigger is pressed with different forces. This kind of work, which is important, requires a certain skill, and it may not immediately work out.
Individual rotary hammers can be used like an electric screwdriver. The necessary information is always indicated in the instructions for the device. To tighten the screws or unscrew them, you need a specific nozzle. There may not be a special mode for an electric screwdriver, usually the “Drilling” program is used instead.
How to use a puncher correctly?
You have to use a puncher in a variety of cases. This tool is literally irreplaceable when decorating and renovating residential and other premises. In skillful hands, the perforator replaces a number of other devices, the only thing left to do is to know how to use this device.
A more effective, but still inconvenient way of creating strobes for electrical wiring is to drill holes every 1-1.5 cm along the width of the future recess. When the “point” track is ready, as shown in the photo below, you can use a chisel to knock out the jumpers between the holes, as a result of which you get an not entirely flat, but still strobe. The disadvantage of this option, again, is the cost of time and low productivity of concrete slitting.
So, among all the listed tools for chipping walls for wiring with your own hands, we recommend stopping at one of two ways:
- Using a wall chaser (even if homemade).
- Combination angle grinder rotary hammer.
Let’s dwell on the last option. The fact is that if you cut through the borders of the groove with a grinder, and then knock out the core from the inside with a puncher, you will get a quick and effective creation of grooves in concrete and brick walls. At home, this option is used very often, so if there is no way to make a wall chaser, stop at this option.!
I would like to deviate a little from the topic and talk about how to speak correctly: shtraba or stroba. The fact is that, indeed, the term in construction is correctly called shtraba, but for some unknown reason, a slightly modified pronunciation has been fixed in the conversation for a long time. Technically, both variants of the word mean the same thing, so don’t be surprised if we use both pronunciations later in the article.!
How to make strobes correctly
So, so that the instruction is understandable even for dummies in electrics, we provide a step-by-step technology that will allow you to quickly and correctly grind the walls for wiring in the house and apartment:
- We protect the rest of the rooms from dust. To do this, hang a damp rag from the inside of the working area on all doorways, which will completely cover the entire opening. Do not rely on closed doors. dust will easily pass through the gaps on all sides throughout the apartment.
- We clean the surface on the ceiling and walls from pieces of wallpaper, because even small pieces of paper can block the movement of the discs and interfere with the normal operation of the chaser.
- We transfer the wiring diagram in the house to the walls using a marker and a building level. By the way, you can make a laser level with your own hands, which will allow you to quickly and more accurately mark the horizontal mowing line for chasing.
- If you are replacing the electrical wiring in the house, you additionally need to make sure that the old wiring no longer passes under the markings. If you, when chasing a wall, stumble upon a live wire, an electric shock cannot be avoided, not to mention a short circuit. To find the wire in the wall, you can use a homemade metal detector or a special cable tester. In the event that you stumbled upon an old wiring, you need to either dismantle it, or isolate and bypass it, stepping back at least 10 centimeters to the side.
- After that, you need to grind the wall for wiring according to the markup. This is not difficult to do, which is confirmed by the videos provided above. As for the strobes for the installation of distribution boxes and sockets, it is better to make them with a drill with a special nozzle. a crown of a suitable diameter (usually 80 and 65 mm).
- When the entire network of grooves has been pierced, we recommend that you capture the picture on a camera, so that later you can easily find the place of damage, focusing not only on the wiring diagram, but also on the photo.
This concludes the chasing of the walls for wiring with your own hands. All that is left for you is to clean the pipe and fix the cable in it with a dowel-clamp, gypsum plaster or alabaster. We talked about this in detail in the article: how to make the right wiring in the house. We draw your attention to the fact that the walls need to be channeled before the plaster, and not after, so that then in one fell swoop to plaster the entire track, preparing the surface for wallpapering or tiling.
If the instructions provided seemed complicated to you, you can always call the wizard so that he not only gouges the entire network of grooves, but also disconnects the wiring himself. However, keep in mind that such a pleasure will not be very cheap. Today, depending on the material of the walls. In addition, a plug for each outlet, switch and junction box will cost you 300 rubles per point. As you can see, the are not very cheap and if you knock up the amount for the whole house, a rather high price will come out, so it’s better to try to do it yourself.
Coming closer to convenient power tools that will allow you to quickly grind an even groove, the worst of the best options is an angle grinder (angle grinder) or, as it is commonly called in the common people, an angle grinder. If you put a diamond disc on it, the process of chipping the walls for wiring will become several times faster, moreover, the contours of the groove will be perfectly even.
There are really many disadvantages of this option: strong dusting of the room, the same groove can be made in two approaches (first one border is cut, then the other), the inability to cut a track in the corner, increased noise during operation, and besides, it is very difficult to make depth the strobes are the same along the entire length. The bottom line is to use an angle grinder to grind the concrete wall only as a last resort.
Well, the last, the most effective option is to use a special tool that allows you to smoothly and at the same time without dust to make strobes on concrete. The wall chaser is really very convenient to use, it does not work so noisy and, moreover, due to the connection to a construction vacuum cleaner, it instantly absorbs all construction dust. To date, wall chasing with this tool is the most effective, fastest and safest. The only but significant drawback of this option is the very high cost of the power tool, so there is no point in buying it for a one-time repair in an apartment. There are two ways to get out of the situation: rent a chasing cutter (it will be inexpensive) or make a chasing cutter with your own hands. We recommend stopping at making a homemade tool, especially if you have an angle grinder, the process will not take more than half an hour.
Requirements for work
Before proceeding to wall chipping, it is necessary to take into account the following norms and requirements in accordance with SP 76.13330.2016 “Electrical devices”, updated edition of SNiP 3.05.06-85 and recommendations of experienced electricians:
The track should run strictly vertically and horizontally, there should not be any oblique lines.
Taking into account all these norms and requirements, you can correctly make a strobe for electrical wiring so that the latter is safe, durable and easy to maintain. Next, we will tell you about how to perform wall chasing with the most popular tool. a chasing cutter, providing step-by-step instructions in pictures!
Chisel and hammer
The grandfather’s way to independently make a strobe for electrical wiring is to knock it out with a chisel and hammer. The advantage of this option is the complete absence of costs, since in fact, you can grind down the wall without a power tool, using the tools at hand that are in every home. Disadvantages. a big loss of time and energy, which is not entirely reasonable in the 21st century.
In addition, you will not be able to make a groove for a cable in a brick with a chisel at all. We advise you to refuse this option, because the following will list simpler and more effective ways of chipping walls for wiring in a house and apartment.
Slitting concrete is a long and laborious process. This material is highly durable and dense, so it is inappropriate to use a metal chisel and hammer.
A suitable material for slitting concrete surfaces is a hammer drill with a special drill and a wall chaser. The hammer drill creates a high level of noise, which can cause a lot of inconvenience to neighbors, so the work should be carried out during the daytime with short technological breaks for 2 hours. In addition, working with a hammer drill is associated with the formation of a large amount of dust when working on a hard surface.
When performing large volumes of work, a professional wall chaser is used, which allows you to chase concrete in a short time with a minimum amount of dust.
How to make a strobe using a puncher?
With a puncher, you can both chisel a concrete wall and make an electric groove in a brick one. There are special nozzles designed for this job, one of which is called a wide auger, and the other is called a shovel. The procedure for this procedure is as follows:
- Using a punch with a wide drill, drill holes 2-2.5 cm deep along the markings made.The distance between adjacent holes should be 1-1.5 cm.
- Change the nozzle on the rotary hammer by installing a spatula instead of the drill.
- Make a furrow through all the grooves. The wire will fit into it.
Read more about chipping with a puncher on
How to Chase a Wall and Fit a Flush Single or Twin Socket Box In a Plastered Brick Walls (Chasing)
The advantage of this method is the speed of work. The disadvantage is that the punch does not allow you to make an even groove, and the groove made will have ragged edges.
Chipping with a drill and chisel
Creating grooves in this way is more productive than in the previous version. Every 1-2 cm holes are drilled in the wall, which are then hollowed out with a chisel. The advantage of this method is that it allows you to make grooves in brickwork, and not just in the plaster layer.
The disadvantages are the same as in the previous version. low productivity and uneven strobes.
Wall chipping with an angle grinder
With this tool, you can easily make an electrical groove in any wall. concrete, brick, plaster. For these works, a diamond-coated disc is put on an angle grinder. Slitting is done in the following order:
- Using an angle grinder, make two parallel cuts in the wall along the entire length of the markings. The depth of the cut lines and the distance between them should be approximately the same. 2-2.5 cm.
- Remove the central part from the resulting groove with a puncher. If you don’t have a hammer drill, you can use a hammer and chisel.
So that it does not cover the whole room, it is advisable to use the help of another person who, during the operation of the angle grinder, will hold the suction hose of the working vacuum cleaner near the cut.
When installing electrical wiring in rooms with brick walls, the chasing is not performed. The cable is fixed to the surface with dowels, after which it is closed with a thick layer of plaster.
If you plan to lay the cable in protective corrugated sleeves or metal channels, the chasing is performed with the same tool that is used for concrete walls.
For arranging horizontal strobes on brickwork, you can use a chisel and a hammer, for vertical ones. an angle grinder with a diamond disc, a chasing cutter and a perforator with a nozzle.
If the walls are plastered, you can restrict yourself to a hand tool, but it will take much more time to chase.
The rules for making strobes for electrical wiring are as follows: horizontal ones are performed at the seams, vertical ones. between separate rows.
For mounting sockets and switches in the wall using a power tool, seats are made.
What tool to choose for chipping
Choosing how to cut a wall for wiring with your own hands, you can consider various tools:
- angle grinder;
- wall chaser.
The wall chaser is the most efficient tool because it is designed for exactly this purpose: a modification of an angle grinder with two parallel discs. Due to the possibility of adjusting the gap between them, as well as the depth, a strobe with specified dimensions is obtained. The retainer makes the furrow depth uniform along the entire length, while other tools give differences.
The disadvantage of a wall chaser is that a lot of dust is generated during its operation. At the same time, almost all wall chasers are equipped with a clamp for fixing the vacuum cleaner pipe, which simplifies the removal of excess material. The channel is laid faster, since it is cut in one pass. Otherwise, everything is the same as laying a groove using an angle grinder: remove excess material with a chisel or perforator.
Using a wall chaser to create a wire duct
Using a hammer and chisel, the furrow comes out uneven. The advantage of the method is its low cost: you do not need to buy power tools. The strobe is divided into small segments. Mark with a chisel along the edges of the channel 1-2 the width of its edge. Then place the tool across the groove and hammer into the depth. After removing the top layer, continue deepening the channel until the desired size is obtained.
Slitting with a chisel and hammer
With a puncher, you will do everything much faster, but the grooves will not be even enough. Here you need a drill and a shovel. Along the entire length of the furrow, make holes of the required depth with a distance of 10-15 mm between them. Remove material with a spatula. Do not place it perpendicular to the channel, as the wall or plaster may chip.
Preparing the grooves with a puncher
With an angle grinder, the walls of the strobes are smooth, but this creates a huge amount of dust. It is best to use a diamond blade: it is effective when processing bricks and concrete. Along the edges along the canal, make two parallel incisions along the entire length of the furrow. Remove excess material between furrows with a chisel and hammer or a hammer drill equipped with a spatula.
Working with an angle grinder on concrete
Wall chaser at work
This unit is most suitable for the formation of channels for wiring. Two parallel diamond discs quickly cut grooves of the required width (the distance between the working elements is adjustable). The advantages of a wall chaser are as follows:
- high speed of task execution;
- the presence of a protective casing, which almost snugly adheres to the point of formation of the cut and thereby does not allow dust to intensively scatter;
- the ability to adjust the dimensions of the channel (width);
- the presence of a special outlet for connecting a construction vacuum cleaner.
Rotary hammer or impact drill
Laying the channel with a perforator
To chisel walls for electrical wiring using a perforator (impact drill), it is worth preparing three nozzles for it. a spatula and two drills of different lengths.
- With a step of 1-1.5 cm along the outlined lines, holes are made with a depth of 2.5 cm.
- Change the nozzle to a spatula and connect all the points into a continuous line.
- It remains to knock the channels into the depths using the same scapula.
Of the advantages of working with a perforator, a high speed of the process and relative purity are distinguished. Of the minuses. the formation of channels with curved edges.
Strobes in concrete and brick
When starting to make grooves in a brick, you need to know its appearance, whether it belongs to silicate, hyper-pressed or ceramic. The most fragile is white brick, special care is required when working with it. When grooving in a brick, it is advisable to use a wall chaser, hammer drill or sander with discs.
For concrete, a percussion drill with victorious cutters, a perforator soldered from pobedit or an angle grinder with diamond discs are used. In some cases, there is a need for a chisel.
Previously, holes for wiring in panel buildings were laid with a hammer and chisel. Modern professional builders in their work use a chasing cutter, a special tool with discs, the distance between which can be changed at will according to the specified parameters.
The advantage of a wall chaser is that you get perfectly straight two parallel lines, there is no dust when you connect a vacuum cleaner to it. It is also the fastest way to make grooves.
Its disadvantage is that only professionals can afford to purchase an expensive tool. DIYers use cheaper power tools in their work.
How to make a groove without a chasing cutter? For this, a perforator or an angle grinder available in many in the home workshop is suitable. For monolithic houses with walls made of aerated concrete, foam concrete, foam blocks and sand concrete, lined with bricks, a router, an electric impact drill or an electric screwdriver with a battery is suitable.
Note! Slitting brick walls is much easier than concrete.
Of course, all of the listed tools have a different purpose, nevertheless, they are suitable for use for this purpose as well. Simply, before using them, a small depression is made on the surface of the wall, to which the power tool is tightly pressed. Next, you just need to pull it along the surface.
If there are multiple speeds on the tool, it is best to use the fastest speed to create grooves.
How to groove walls for wiring with a puncher or an angle grinder? First of all, using a level, horizontal and vertical mowing lines of the drawing are applied to the surface of the walls. Then, along the markings with a distance of 1-2 centimeters, holes are made up to 2.5 centimeters deep. A groove is laid with a spatula, going sequentially from one hole to another. The final stage is cleaning the groove with a nozzle with a semicircular groove.
Important! Under no circumstances should the blade be set against the direction of the grooves. This could chip the wall surface.
The easiest tools to groove surfaces
Strobe in the tiled floor
To cut the grooves in the tile, use an angle grinder or a cutter with a diamond disc. The puncher can damage the tile, cover it with cracks.
Working with wood and aerated concrete
Wood and aerated concrete are among the most pliable materials. The holes in them are easy to chisel and chisel. True, it takes time. It is much easier to make grooves with a circular saw or milling cutter.
In what cases are walls channeled for wiring
There are 2 types of wiring: indoor and outdoor. Internal is mounted inside buildings and structures. Outdoor wiring is mainly used for routing along the outer walls of buildings. Internal, in turn, is divided into open and hidden. For open use pipes, sleeves, boxes. Concealed is mainly used for floors and walls.
Lining of grooves is necessary when wiring is worn out, when power distribution boards are moved, it is necessary to install additional electrical switches and power outlets, and when devices with high power consumption are installed.
Standards for wall chipping for wiring
Among the closed installation method, the most common is wall chasing. After laying the wiring, the holes are sealed with plaster or cement mortar, leveling with the wall, which is then covered with a finishing material.
Note! After covering the walls with decorative material, you can only find the place for laying the electrical wiring with a special tool.
To avoid getting onto electrical wires while making holes in the walls, a number of rules have been developed that must be adhered to. All grooves are made in vertical and horizontal directions at an angle of 90 degrees. Inclined laying is only possible in attics and staircases with sloped walls.
Nuances with load-bearing walls
According to the Appendix of the decree of the government of the Russian Federation 08, paragraphs 11.3 and 11.11 are prohibited from making grooves in load-bearing walls in order to avoid damage to them. To carry out the work, documents are drawn up equivalent to redevelopment.