Attachment for an angle grinder: Do-it-yourself wall chaser from an angle grinder

What is a wall chaser

When renovating apartments, homeowners take a new approach to the placement of utility networks and various communications:

water supply pipes;
heating lines;
power cables;
sewer risers.

It is understandable that apartment owners want to place communications inside the walls and thereby improve the appearance of the premises. The technology for hidden placement of highways involves the creation of special grooves. In the vocabulary of professional builders, such channels are called grooves. For their production, a gas silicate wall chaser is used.

Wall cutter for aerated concrete. The tool began to be used relatively recently. Before its appearance, equipment was used for chiselling grooves that created vibration during operation and negatively affected the strength of building structures:

a bolt or chisel that was struck with a hammer. The process of creating the grooves was slow and required considerable effort;
pneumatic hammer. The tool created increased noise and significant vibration. A lot of dust was also present during the formation of the channel;
industrial hammer drill. During the formation of cavities, vibration negatively affected the strength of concrete and caused the formation of cracks.

The use of these types of equipment required significant physical effort and was characterized by reduced productivity and increased labor intensity. Increased concentration of dust, significant noise and vibration caused a lot of inconvenience. The outdated equipment was replaced by a wall chaser for aerated concrete - a hand-held tool that has many advantages:

reduces the duration of laying channels in walls;
reduces the labor intensity of construction operations for gating;
allows you to provide the necessary channel geometry in various building materials;
provides the ability to adjust the width and depth of the cavity being formed;
removes dust from the treated area, reducing dust concentration;
forms a channel of the correct shape with constant dimensions along the length.

Industrial wall chaser for aerated concrete.
For one-time work, there is no need to purchase an industrial wall cutter for aerated concrete, which is quite expensive. There is a good solution - you can assemble a wall chaser from an angle grinder with your own hands. Drawings are not needed for this modernization, because the design is simple. Using available materials, you can expand the technical capabilities of home tools equipped with an aspiration system. The use of a self-made tool ensures:

reducing the cost of plastering the groove due to the neat shape of the channel. The resulting groove does not require an increased amount of plaster;
the ability to cut grooves in building materials with increased hardness. In this case, two cuts are performed at once in one pass.

After processing, all that remains is to remove the cut building material located between the cuts, and you can begin laying communications.

A simple wall chaser for aerated concrete made from boards and self-tapping screws

Let's consider another device that will be useful to those who build a house from aerated concrete.

Construction reinforcement is used to reinforce the masonry, but since the seam between the blocks is quite thin, the reinforcement is placed in special grooves.

These grooves are cut along a row of gas blocks along the perimeter of the “box” of the house.

For this, a factory mechanical wall chaser is usually used. But you can get by with a homemade tool, which is in no way inferior to its factory counterpart.

To assemble a manual wall chaser for aerated concrete with your own hands

, you will need two boards and screws.

We choose more or less even boards (or you can use plywood), saw off two blanks of a suitable size, and then fasten them with screws at an angle of 90 degrees.

Next, we saw off two wooden blocks and screw them to the top of the wall chaser - they will act as handles.

At a distance of 7-8 cm from the edge of the top board, you will need to tighten 5 screws. They will serve as cutters for aerated concrete

The side guide board allows you to cut a groove strictly parallel to the wall.

The only disadvantage of this homemade tool is that when working from the inside of the wall, you cannot close the corners - you have to “pick” them manually.

But, given the simplicity and low cost of the design, you can turn a blind eye to this drawback.

Read step-by-step instructions on how to make a wall chaser for aerated concrete with your own hands

, you can watch the author’s video below. The idea was shared by the author of the YouTube channel MY GALAXY.

⚫Homemade from Junk Became an Amazing Find for Builders! 2 bars and 10 screws.

A little about gating

A groove (the term “furrow” is less commonly mentioned) consists of two parallel grooves, the width and height of the walls of which determine the possibility of installing communications in it. To make grooves, the following groove dimensions are required:

Width from 3 to 50 mm (the first option provides for laying only power and low-current cables in the groove, the second - for installation of heating system pipes);
The depth of the groove is no less than its width, but it is better with a small margin of 5...10 mm;
The bottom of the groove is smooth, without protrusions.

Sometimes you have to cut inclined grooves. For oblique grooves, all specified dimensions are usually increased by 10...12%. The groove should be as even as possible, since any slope of the groove will automatically increase the length of the cable or pipe. The distance from the groove axis to adjacent ceiling structures, openings, etc. must be at least 150 mm, and to the gas pipeline elements - at least 400 mm.

The material of the walls also matters. Since the groove is obtained by removing material from under the tool disk, all dust and stone fragments fall into the worker. Even when performing such work in walls made of foam or aerated concrete, the need for dust collection is very important, since fine dust will remain in the air for a long time.

In a professional wall chaser, all these problems are solved by connecting a vacuum cleaner with a cyclone filter to the tool. Ordinary mesh ones will become clogged with gating products within a few seconds of continuous operation of the wall chaser.

The second significant difference between gating with a specialized tool is the presence of a movable frame with wheels, which, when controlled, can significantly reduce the load on the worker’s hands. A single-disc wall chaser attachment for an angle grinder does not fundamentally solve the problem, since the depth of the groove is not limited in any way, and manual removal of the jumper is very labor-intensive and does not ensure good quality of the bottom of the resulting groove. In addition, during the second pass it will not be easy to achieve parallelism of the walls of the groove.

Wall chaser for foam blocks - design features

Manual tools for grooves can be manufactured in the following design options:

based on a regular grinder. The design provides for the installation of two concrete cutting discs on the device shaft, between which a sleeve of the required length or the required number of washers can be installed. By changing the length of the spacer element, the interval between the cutting discs is adjusted, corresponding to the width of the channel;
modernized version. It is an improved version of the grinder, on which, in addition to two circles, a casing made of metal sheet is mounted. Dust generated during the gating process is removed through a pipe attached to the metal casing of the aspiration device;

Wall chaser based on a regular grinder

based on a hand grinder. An improved version of the tool is similar in design to a grinder with an aspiration casing. A distinctive feature of the design is the presence of a mobile platform with wheels, fixed at the bottom of the dust receptacle. This option allows you to easily move the device along the wall without applying significant effort.

An electric wall chaser for a gas block is more efficient than a manual tool due to the following points:

increased cutting speed;
smooth surface of the groove walls;
clear channel geometry;
increased security;
aspiration possibilities.

Modern electric scoring tools include:

protective casing. It prevents the operator from being injured by fragments when rotating the disks;
aspiration pipe. Provides dust extraction from the work area when connected to a vacuum cleaner;
work site. Provides smooth movement of the device along the wall and allows you to adjust the depth of the groove;
working handle. It can be installed in various places of the casing, providing a convenient location for the device when cutting;
electric drive. Accelerated slitting is provided with a power of 2 kW and a spindle speed of 5500 rpm.

Models of wall chasers and how they work

Let's look at several concrete wall chasers to understand the design, operating principle and capabilities.

Interskol PD-125/1400E

Wall chaser from a domestic manufacturer. Two 125 mm discs are capable of making a furrow up to 30 mm deep and up to 30 mm wide. The power of the unit is 1400 W. And the maximum number of revolutions is 9500 per minute. The cost of this tool is about 6,000 rubles.

This wall chaser is very similar to an angle grinder, perhaps it is based on it

Bosch GNF 35 CA

A more productive version of a manual wall chaser for aerated concrete, concrete and brick. 2 cutting discs 150 mm each. The maximum groove width is 39 mm, and the maximum depth is 35 mm. The power of the device is 1400 W. The design involves connecting a vacuum cleaner and removing dust and debris. The cost of such a tool is quite high - 40,000 rubles.

A convenient and practical tool, although a little expensive

Makita SG150

Powerful and productive wall chaser. The cutting depth can reach 45 mm and the width 35 mm. The power is 1800 W, but the number of revolutions is slightly lower than usual - 7800 rpm. You can also connect a vacuum cleaner to it. The device costs about 42,000 rubles.

Functional and powerful option

Application benefits

Wall chipping is a difficult, troublesome task that takes a lot of time and effort. Previously, a variety of devices were used for such work: a chisel and chisel, a hammer drill, an angle grinder. But it is much more convenient and efficient to use a wall chaser or an attachment on an angle grinder for chasing.

So, using a specialized tool has the following advantages:

The speed of work completion increases significantly, and labor costs are reduced.
Can be used in conjunction with a construction vacuum cleaner.
Work safety increases.
It is easy to adjust the width and depth of the groove.
The grooves are smooth, without chips or drops.

Attachment - wall chaser for an angle grinder: characteristics of the device

To lay communications such as electrical wires, water and heating pipes into walls, they resort to the use of a specialized tool - a wall chaser.

Such a tool has significant drawbacks - it is quite expensive and has a narrow focus.

But don’t be upset, as there are special wall-boring attachments for angle grinders on sale.

Why is this process necessary?

The design of a standard wall chaser has much in common with a grinder or angle grinder. A significant difference between a wall chaser and an angle grinder is the high speed of work, as well as the ability to conveniently regulate the depth of the cut groove. It can create a groove of the depth required depending on the assigned technological tasks.

A grinder is an excellent analogue of a wall chaser, since it can be used to carry out repair work in residential and non-residential premises where it is necessary to make special grooves or channels for laying pipes and electrical wires. In order to use the angle grinder as a wall chaser, you will need a special casing. It will allow you not only to adjust the depth of penetration of the cutting tool, but also to carry out work without dust.

In most cases, when it is necessary to make a groove in a wall, craftsmen resort to the use of the following tools:

chisel with hammer;
perforator;
Bulgarian.

It is important to know! Only if the master’s work is directly related to the need to make channels in the walls every day, then it is better to purchase a professional wall chaser. If you need to cut a channel in the wall when carrying out repair work, then an angle grinder is quite suitable for these purposes.

Moreover, there is no need to purchase a special wall chaser attachment for an angle grinder, since you can make it yourself

If you need to cut a channel in the wall when carrying out repair work, then a grinder is quite suitable for these purposes. Moreover, there is no need to purchase a special wall chaser attachment for an angle grinder, since you can make it yourself.

How to make a groove using a regular grinder

Scoring with a grinder can be done in walls made of brick, concrete, cinder block and other materials. In order to make a groove with a grinder you will need:

Apply markings. To do this you will need a tape measure, a rule or level, and a pencil. The lines to be drawn should be bold, since when the grinder is used, dust is released, which may make the markings invisible.
Cutting out the grooves. You should follow the drawn lines with a grinder with a diamond cutting disc, but keep in mind that you should hold the tool with both hands, and the work should be carried out in protective devices: glasses, a mask, gloves.
Knocking out or removing plaster. At the final stage, you will need to use a hammer and chisel to remove the plaster between the cut lines.

It is important to know! Sometimes experts use two instead of one fixed disk on an angle grinder, which allows them to get a finished groove in one pass. This significantly saves time and physical effort.

The main disadvantage of this gating method is the release of a large amount of dust. If the work is carried out in a non-residential premises, then this is not so scary. If the room is residential, then dust not only interferes with the gating process, but it also settles on the surface of furniture and household appliances, that is, it dirty the decor.

Rules and restrictions when gating

Wall slitting should be done only after a plan for the location of hidden electrical wiring or water pipes has been drawn in the room.

When performing gating work, it is important to consider the following factors:

Procedures are usually carried out only in the vertical or horizontal direction.
The slope of the groove is allowed in exceptional cases.
Horizontal grooves are made at a distance of no more than 15 cm from the floor slabs.
Vertical grooves must be at a distance of at least 10 cm from door and window openings, as well as corners. At least 40 cm from gas pipes.
The width and depth of the groove should not be more than 2.5 cm. The length of the groove should not be more than 3 meters.

In conclusion, it is worth noting that before starting work, you should prepare not only the appropriate tool, but also make a control check on the location of the groove.

Wall chaser design and functions

Structurally, this universal tool is most similar to an angle grinder (angle grinder), which in everyday life is called an angle grinder. It is widely believed that this is an angle grinder with two discs. Frankly speaking, it is almost correct. The main difference is that the wall chaser is equipped with a powerful electric motor, usually with the ability to control speed and smooth start. Good models have overheating and overload protection functions. In case of significant loads, they will allow you to save the tool.

The wall chaser uses diamond discs, the distance between them is adjusted to obtain a groove of the required width (usually up to 60 mm). For safety reasons, they are covered with a special casing. In addition, the casing has an outlet for connecting a vacuum cleaner, this allows minimizing the emission of dust during gating. To obtain the required depth, it is equipped with a special adjustable stop (usually up to 80 mm).

With the help of an attachment for an angle grinder, you can completely replace the wall chaser.

How does a wall chaser work?

To understand how to assemble a homemade wall chaser from an angle grinder, you need to know how a device created in a factory works. Its main parts are a powerful electric motor, on the shaft of which two concrete discs are mounted. The distance between them is adjusted with nuts. Additional, but no less important components are a protective casing, which also serves as a dust collector, and an adjustment bar, which determines the depth of the groove.

The required cutting depth is set, a vacuum cleaner is connected and now you just need to run the wall cutter along the markings drawn on the wall, after which the hammer used for wall cutting (popularly called a “shovel”) is put on the hammer drill and the concrete is knocked out from inside the cut.

Features of choosing a tool

When there is a need to purchase such a tool, it is better to follow simple instructions:

Select the required power of the tool. Here it is important to be guided by the amount of work ahead. Low-power wall chasers (up to 1.3 kW) are suitable for solving small household problems. Medium-power tools (1.3 kW - 2 kW) can cope with all household tasks, they heat up much less than their low-power counterparts, and their service life is much longer. It makes sense to buy powerful models over 2 kW only for regular and very large, volumetric work. In addition, the more powerful the tool, the heavier it is. This feature should also be taken into account.
Determine such characteristics as the required maximum depth and width of the groove, the possibility of cutting the groove at an angle, the range of regulation of the electric motor speed.
Availability of additional options: slip clutch, protection against overheating and overloads, a brush wear control system, the ability to use it in “grinder mode”, the presence of a vibration protection system.

Features of gating

For any work related to gating, use protective equipment - glasses, headphones, a respirator. Working without them is hazardous to your health.

Before gating, determine the depth and width of the groove (twice the diameter of the fitting). You can read more about the dimensions of the grooves and hidden installation in the article Installation of polypropylene pipes for water supply to an apartment.

When cutting grooves, remember that grinders and wall chasers (furrow cutters) are not designed for circumferential threads; this will lead to overheating and damage to the disk. Therefore, cut only straight lines.

Do not cut the groove more than a third of the thickness of the curtain wall. And no more than a fifth of the carrier. If you are making a groove in a panel house, do not touch the load-bearing walls at all. If a groove in a load-bearing wall is reported to the regulatory authorities, you will be issued a fine.

Protective agents used for gating

When working, move the tool smoothly, without jerking or turning. Do not start cutting until the blade has spun (you will know this by the sound; if the sound stops changing, the blade is completely spun). If possible, purchase or rent a powerful industrial vacuum cleaner (its cost is 10-20 thousand rubles); household vacuum cleaners will only cope with dust on a smoothly plastered wall.

From the article you learned what tools are used for gating walls, their cost and proper use. This will help you prepare for the plumbing installation. Follow the work and safety rules recommended in the article; this will protect you from injury and tool breakage.

Expert opinion

It-Technology, Electrical power and electronics specialist

Ask questions to the “Specialist for modernization of energy generation systems”

Rules for gating walls for wiring: choosing a tool and technology - Construction Blog 230 mm discs allow you to go 85 mm deep, however, the minimum groove depth in this case will be about 15-20 mm. Ask, I'm in touch!

Electric

This is a powerful tool that has two rubber rollers that help the wall chaser move easily along the wall surface being processed. This furrower is equipped with comfortable handles and several cutters that move thanks to a built-in electric motor. Designed for cutting grooves in various hard building materials.

This is a fairly simple construction tool, but its use requires certain skills and experience from the master. Also, when working with power tools, you should remember to wear personal protective equipment, as they create a lot of construction dust and noise.

Do-it-yourself wall chaser from an angle grinder

A wall chaser is a rather rare tool that not everyone has, but almost every home craftsman has an angle grinder. As already noted, structurally, these tools have a lot in common, so for home use you can easily make a wall chaser from an angle grinder with your own hands.

To begin with, it should be noted that you can use a grinder for slitting without any modifications, but it will be inconvenient, dusty and ineffective. A wall chaser is incomparably more convenient in this regard, but it is expensive. The rework will not require any special material or time costs.

We should start with the main difference - the wall chaser has two discs, and the grinder has one. It is necessary to order or grind yourself a nut with an additional ring to secure the second disk. The first disk will be secured in the usual way, and the second one directly to this nut. It is best to make several nuts of different thicknesses so that you can adjust the width of the groove. It is necessary to pay attention to the length of the shaft; it should be enough to mount two disks. It may be necessary to purchase or manufacture an extended shaft. Read about how to make a casing for connecting a vacuum cleaner here.

The second stage is the manufacture of a groove depth limiter. It is much more convenient and easier to work with him. You should also make a support plane so that the grinder with the attachment can be moved along the groove.

At the last stage, a homemade protective casing is made. By the way, the depth limiter can be combined with a protective casing, which is very convenient and greatly simplifies the entire design. It is necessary to provide an exhaust pipe in the casing for connecting a vacuum cleaner, otherwise it will be almost impossible to work in a closed room due to the high concentration of dust. It is absolutely forbidden to work without a protective casing - the likelihood of injury, even death, is extremely high.

Design and features of a wall chaser

In appearance and functionality, the wall chaser resembles a grinder with two discs. This is actually true, because it was the angle grinder that was taken as the basis for this tool. The main difference is that the wall chaser contains two entire disks, and the very high power of the tool allows you to cut out large areas of walls from any material - from brick to concrete - very quickly and with minimal effort. The principle of operation of the device is the same as that of an angle grinder; cutting discs drill out walls to the required depth, but there are significant differences.

Let's look at the kit of the wall chaser:

The cutting attachment is located strictly perpendicular to the platform.
The platform, or sole, of the wall chaser allows you to rest it on the surface being cut, making the work easier.
By adjusting the sole, you can set the required depth of the groove.
It is mandatory to equip the tool with a vacuum cleaner.
Two cutting discs, when adjusted, you can adjust the desired distance between the grooves.

Since the wall chaser is a professional tool with a narrow focus, it has disadvantages:

High price. A high-quality power tool is expensive, and only pays off in cases where the master constantly works with the tool. In case of one-time use, there is no point in purchasing it.
Narrow list of work performed - Cutting tiles or metal will not work due to the presence of two discs instead of one.

It is useful for owners of private houses to know how to choose a circulation pump for a heating system.

Assembling the wall chaser

If you have a new nut, all that remains is to assemble a homemade furrow maker as follows:

mount the first circle on the shaft;
install the bushing that was made together with the nut;
place the second cutting disc on top;
we pass the modernized nut through it and tighten it until it stops; As a result, the fastening element fixes the first disk and prevents the second one from jumping off the shaft.

At the last stage, a protective casing is installed, to the nozzle of which the vacuum cleaner hose is connected.

Detailed instructions on how to make an attachment for an angle grinder with your own hands

Manufacturing algorithm:

Mark the contours of the internal partition of the nozzle on a sheet of metal, using the standard casing from the machine as a template.
Make blanks for the mounting clamp. Some craftsmen retain the factory screen with standard fasteners, to which they weld a plate to reduce the overhang of the cutting tool.
Cut the workpiece and cut windows for installation on the tool body.
By analogy, prepare the blank outer wall of the nozzle.
Cut a rectangular plate of the outer part of the protective screen, which has an increased length. The excess is needed to form the abutment surface.
Connect the parts at points using resistance welding, and then completely weld the seams. It is permissible to install a stud on the outer part of the cover used for mounting the auxiliary handle.
Bend the protruding corners of the outer part of the nozzle at a right angle.
Clean the joints with an abrasive tool.
Cut a hole on the outer part of the nozzle into which to install a dust removal tube for welding.
Degrease the surfaces and coat with impact-resistant paint.
Mount the attachment on a grinding machine with installed diamond discs, using the standard mount on the internal partition for fixation.
Connect the vacuum cleaner hose to the tube (for example, through a layer of masking tape to seal the joint), and then make a test cut.

How to properly operate a manual wall chaser on aerated concrete

After assembly, you should check the functionality of the device on a pre-marked cutting area and learn operating skills. Sequencing:

Assemble the discs with the bushing on the shaft and tighten them with a nut.
Set the required groove depth and turn on the aspiration unit.
Press the power button after connecting to the network.
Touch the marked surface and groove.

The device should be moved after the discs are immersed to the desired level. It is important to monitor engine heating and periodically stop the engine to cool.

Adjusting the cutting depth

Almost all models of wall chaser attachments for industrial angle grinders use roller guides with an oscillating sole. It is easy to make such a system with your own hands.

The cutting depth adjustment system looks like a frame, the front edge of which is fixed to the casing using a hinge, and the opposite side is fixed with a bolt-nut fastening. When the wing or bolt head rotates, the back bar with rollers deflects, which allows you to accurately adjust the depth of the wall chaser nozzle disk.

Hammer

Another common and fairly simple way to make a wall chaser yourself is to use a hammer drill. But instead of the usual drill, you should insert a cutter of the required size into it.

Such a wall chaser is quite simple and does not require much time and effort to manufacture, but at the same time it produces a very low quality of work. The groove is not only curved in height and length, but also of different depths and widths. As a result, you will have to spend much more time on gating and a much larger amount of finishing materials.

Features of the tool

Building regulations provide clear dimensions for fines, which are designed for certain materials of building walls and should not weaken their strength. This is especially true for walls mounted from reinforced concrete panels, for which the depth of the groove is strictly limited. Violation of these standards may weaken their strength and lead to undesirable consequences in the future. For example, in old panel houses (Khrushchev-era buildings), it is generally prohibited to use hammer drills, but working with a wall chaser is allowed, since no negative consequences are expected from this.

Compared to a grinder, the speed of cutting a groove with a wall chaser increases almost 2-3 times. The grooves themselves are smooth, identical in width, and what is very important, the specified depth is strictly observed. At the same time, during its operation, a minimal amount of dust is generated in the room, and the work is much safer for the performer.

Description of equipment

A wall chaser is used in construction to cut grooves of both different depths and widths. Particular attention should be paid to the description of this equipment:

Almost all models of wall chasers are equipped with two cutting wheels with diamond or Pobedit coating on the cutting edges. The distance between the cutting wheels can be adjusted according to the width of the required groove, so that the groove is cut in one pass. In this case, the cuts are smooth and of the same depth, which will subsequently be reflected in saving time and material when sealing them.
When using a grinder to cut one channel, you will have to perform two approaches. In this case, the slots will be of varying depths and, naturally, with some deviations from a straight line.
The wall chaser has a base in the form of a platform on which a slide with several guide rollers (2-4 pcs.) is mounted. With the help of the platform, the depth of the slots is adjusted and the stability of the wall chaser is ensured during operation, which is almost impossible to achieve when working with an angle grinder.
The slide ensures easy sliding of the tool along the surface of the wall while cutting a channel for making a fine. When the tool is removed from the cut grooves, the slides are lowered, covering the cutting discs. This ensures the safety of the worker who could be cut by the spinning discs.
Wall chasers are equipped with special casings to collect dust, which is generated in large quantities during cutting concrete, brick or other materials. The casing has a special pipe to which a hose from a vacuum cleaner or a filter is connected that collects dust and small fragments from the building material being cut.

Benefits of use

Using a wall chaser for cutting grooves has a number of advantages, including:

The result is a neat and accurate, according to calculations, depth and width of the groove. Thanks to this, a minimal amount of plaster or putty is used.
Using two disks, two cuts are made simultaneously in one pass, which significantly saves time and reduces the labor intensity of the work process.
Thanks to the ability to connect a vacuum cleaner and the presence of a casing, there is virtually no dust in the room during operation. The noise level created by a wall chaser is several times lower than a working hammer drill.
When cutting channels (fines), there is completely no vibration - which is very important for old panel buildings.
This method of preparing channels for hidden laying of pipes and electrical wires turns the long and labor-intensive process of gating into a comfortable and time-consuming job.

Stages of cutting fines

Before starting work, markings are made on the wall to cut out the grooves, and on the tool, using a platform, the cutting depth of the grooves is set. To do this, the platform is positioned in such a way that the cutting parts of the disks extend beyond its limits to a distance calculated for the depth of the groove.

When selecting the width of cutting channels (for fines), the distance between the disks is regulated by a set of washers or bushings, which are placed on the tool axis between the disks.

After this, a flexible hose from the vacuum cleaner is connected to the casing pipe, and the tool is connected to an electrical outlet.

The wall chaser is driven by an electric motor, which is powered by a 220 V mains voltage, and the operating principle itself is quite simple. The tool is pressed and guided along the surface of the wall, simultaneously cutting out two even grooves of equal depth. Cutting is carried out simultaneously with two disks, the cutting part of which consists of diamond coating or pobedit brazing.

In this case, the tool does not sample the channel itself. Other tools are used for this operation.

Once the slots are completed, the material between the slots is removed with a hammer drill or a metal chisel and hammer. When performing the same work with a regular grinder, it will take several times longer to complete a similar procedure of the same volume.

Professional wall chasers equipped with industrial vacuum cleaners are very expensive and are usually purchased by enterprises that are constantly engaged in construction work. For one-time work , naturally, purchasing such equipment will be quite expensive. In this case, the best option would be to rent this tool or make a wall chaser cover for an angle grinder with your own hands.

What to make a protective dust cover for an angle grinder from

The manufacture of a protective casing involves the use of such types of materials as a plastic canister, aluminum pans, chipboard, plywood, laminate, board, stainless sheets, etc. You can choose any material that is available on the farm. This eliminates the need to buy an attachment, since making it with your own hands is very easy and simple.

The main condition is to ensure sufficient strength of the finished attachment for the grinder. The casing must withstand the impact of small particles of concrete flying out during work. To make the casing, there is no need to resort to the use of auxiliary tools, such as welding, since a nozzle can be quickly made from a plastic canister. An example of such a nozzle is shown in the photo below.

The manufacture of such a device requires a minimum of time. A homemade wall chaser from an angle grinder can be made quickly and easily, using an arsenal of improvised tools. If you use materials made of aluminum or wood, then when working on the manufacture of nozzles you will need self-tapping screws, and when using steel you cannot do without a welding machine. Let's consider the principle of making a wall chaser attachment for an angle grinder with your own hands:

For production you will need leftovers from chipboard or fiberboard. In addition, even plywood will do, so we use any sheet material that is available
Two side bases are cut out of chipboard according to the appropriate shape. The shapes of these bases depend on the size of the available tool
To avoid having to select a shape, it is recommended to first make a drawing on paper and then transfer it to cardboard. Make a template from cardboard, eliminating all the shortcomings
Based on the template, make a cover using chipboard
Drill a hole of the appropriate diameter on one side of the chipboard base. Use this hole to secure the finished attachment to the power tool.
To connect chipboard when making the nozzle, you can use self-tapping screws or special furniture fasteners of appropriate length

The photo below shows the resulting case for the grinder. Such a cover is easy to make, but its drawback is the absence of a hole for connecting a hose. A sleeve of the appropriate diameter and length, which must be mounted in the upper part of the structure, will help eliminate this drawback. A hose from a vacuum cleaner should be connected to the protrusion of the sleeve.

This is interesting! When using a vacuum cleaner to suck up debris and concrete chips, it is recommended to use industrial or construction vacuum cleaners, but not household ones. They are not designed for such things, so in the end they can quickly fail.

The process of making a nozzle is not difficult, and the quality of the final device depends more on the ingenuity and imagination of the master. You can make not just a simple case for an angle grinder with your own hands, but also an adjustable one. The principle of manufacturing an adjustable protective casing is that you need to make an additional moving part. Due to this moving part, the required size of the protrusion of the cutting discs on the grinder will be selected.

In a similar way, you can make a nozzle with an adjustable part from chipboard and other materials.

How to turn an angle grinder into a wall chaser

To make a full-fledged wall chaser from an angle grinder with your own hands, you need to solve two questions:

Dust removal. This is a primary problem - without solving it, further modernization is pointless.
Placement on a shaft designed for one disk, two circles on concrete. At the same time, the design must be reliable and ensure a strictly perpendicular position of the circles to the cutting plane - the slightest distortion at 3000 or more revolutions per minute means, at best, jamming and failure of the gearbox or engine.

Making a protective casing

By and large, this part makes a homemade wall cutter out of an angle grinder - this attachment on an angle grinder replaces the standard protection installed on the device, completely hiding behind itself the part of the circle that is not immersed in the wall. How to make fasteners should not be a question - they are simply copied from a factory part.

The protective and dust-collecting casing is a flattened cylinder cut off on the side, in which there is a pipe for connecting a hose from a vacuum cleaner (you can use a construction filter, or if you make a cyclone filter, then an ordinary household one).

The height of the cylinder is made sufficient to accommodate two disks at the required distance from each other. To make it, you need two iron semicircular plates and a strip of steel that will hold them together. The strip is bent, welded to the rounded parts of the plates and the base of the casing is ready.

Depending on the fastenings of the factory protection, in the plate that will be adjacent to the body of the angle grinder, in addition to the slot for the shaft, holes are made for bolts, or a clamp clamp is welded.

Adjusting the cutting depth

The part of the casing that solves this problem also serves as a guide for the wall chaser - if you attach wheels to it, then the device can be easily moved along the wall along them.

It is made in an “L” or “T” shape - the lower part of the “letter” is made up of two corners, which are attached to the upper part of the protective casing so that the lower part can freely lower and rise, which will allow you to adjust how much the disks will peek out from -under the casing. The easiest way to fix it in a given position is to use a bolt connection or a stop.

Additionally, the sidewalls are welded to the base of the guide so that dust, no matter how the cutting depth is adjusted, does not fly out from under the casing.

The upper part of the “letter” is needed for stability - wheels are installed on it for smooth movement of the wall chaser along the wall.

Installation of two disks on the shaft

It is extremely rare that the factory shaft of an angle grinder is of sufficient length, which will allow you to immediately attach two circles to it. There are two logical ways out of this situation - grind a new shaft or make a nut that would clamp the first circle and hold the second. For a number of reasons, the second solution is more profitable:

There is no need to disassemble the grinder.
If the device fails, you can purchase another one and simply replace the nut on it.
Technically it is easier to turn a nut than a shaft connecting to the gearbox.
The nut is turned together with the bushing.

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Put on the discs in the following order:

The first disc is installed on the grinder shaft.
The bushing is placed on top of it and the second circle is placed on it.
The nut is threaded through the upper disk, the sleeve and tightened, pressing the first disk and clamping the second between itself and the sleeve.

The entire structure is clearly shown in the video:

What recommendations and tips to consider when gating

You can begin the procedure for preparing grooves indoors immediately after making your homemade product. When punching a groove, one important nuance must be taken into account - the work should be carried out in a room where the location of the electrical wiring is previously known. If a live wire is encountered along the path of the tool, the result of such an encounter can be fatal for the master.

It is necessary to carry out gating work with both a conventional wall chaser and an angle grinder, taking into account the following tips and recommendations:

Procedures can be carried out in vertical or horizontal directions
It is possible to ditch at an angle in extremely rare cases when it is necessary to bypass a decorative element or communications
Horizontal grooves must be carried out exclusively at a distance of up to 15 cm from the floor slab
Vertical grooves must be located at a minimum distance from doors and windows of 10 cm
When carrying out work, it is important to take into account the depth of the groove. It is necessary to select the depth depending on the type of communications that are planned to be laid in the groove, as well as the thickness of the wall itself. If this wall is load-bearing and is external, then the depth of the groove should not be more than 3 cm
The width of the groove is also selected depending on the technological task, but it is not recommended to exceed the permissible limit of 2.5-3 cm

After laying communications, the groove should be sealed with cement mortar. The location of the groove should be leveled with the plaster of the wall. It is recommended to carry out gating work at the construction and repair stage before plastering the walls.

It is not at all difficult to make a wall chaser for concrete from an angle grinder, and if you set yourself such a goal, then everyone can achieve it. When drawing a conclusion about the work done, it should be noted that when chipping, you need to take breaks to allow the power tool to cool down. If the cover does not have a connector for connecting a vacuum cleaner, then work must be carried out in a respirator. Glasses must be worn in any case, as various small particles can get into the eye.

Depending on the type of material that is being cut, it is necessary to select the appropriate speed of movement of the tool. If you come across reinforcement in a concrete wall on the way, it is recommended to saw it with an abrasive wheel. It is necessary to use a wall chaser on wood with extreme caution, not forgetting about the backlash.

How to make a wall chaser from a grinder

You can make a manual wall chaser with your own hands. For aerated concrete, concrete and brick. This will be cheaper, but will require certain skills and the availability of other auxiliary tools, for example, a welding machine, drill, lathe. As a rule, there are no drawings for a wall chaser made from an angle grinder yourself. Everything is done based on their own needs, the availability of a certain type of angle grinder and capabilities.

Making a protective casing

Probably the most crucial moment in the entire process of manufacturing the wall chaser attachment for the angle grinder. To do this you will need welding skills and a welding machine. It is better to choose metal about 1-2 mm. This will provide better protection against fragments of concrete and the disk in the event of its flying apart. The area where the disks are placed should have a width with a margin of two disks, and in such a way that the total width can be adjusted up to 50 mm. The diameter of conventional concrete sawing discs is usually 125 mm. This is enough to make a furrow about 30 mm deep, which is quite enough for most communications. Therefore, the size of the casing should be slightly larger than the diameter of the discs used.

You can buy a casing for a wall chaser ready-made, but its width does not always correspond to the desired one

In the design of the casing, it is necessary to take into account the outlet to which the vacuum cleaner for the wall chaser will be connected. With your own hands you can select the diameter of the hole to suit the required one. In principle, it can be done without it, however, this will significantly worsen the efficiency of the wall chaser and the service life of the discs. And working in dust is not so comfortable.

The reference plane will help to avoid uneven cutting depth

The supporting plane or sole is also made of metal. A slot is made in it with a margin for the maximum width of two disks. The ideal option would be to make a sole with a fixed depth. This will allow the grooves to be cut to the desired depth. It is also a good idea to take care to tilt the sole beyond the line of action of the discs to avoid injury. Installing a spring on the fastening mechanism can help with this.

There are some pretty brutal solutions

The fastening system can be repeated from any original casing, which, in essence, is a clamp with a bolt and a fixed nut. As mentioned earlier, you won’t be able to buy a groove attachment for an angle grinder as such. There are only modified casings that can speed up the conversion process a little.

Shaft or nut

In order to attach the second disk to the grinder, the length of the standard shaft may not be enough, especially for cutting wide grooves. Here you can go two ways: buy or make an extended shaft, or buy or make a special nut with fastening for the second disk.

Standard shaft for angle grinder

Finding a ready-made shaft will be quite difficult, because manufacturers produce them extremely rarely. You can turn it on a lathe yourself or order this work at any turning shop.

In general, you can use various tricks - place a puck, for example

But most often a special nut is used. Finding it or making it is easier. Structurally, it is a clamping nut, on the other side of which there is another one with a small shaft. A second disk is placed on it and secured with another nut. For narrow grooves up to about 0.8-1 cm, you can get by with two standard nuts. The first disk is placed as usual, and the second one is placed on top, after which it is secured with a second nut.

If you need a narrow groove, you can do without special nuts and shafts

The approximate result of a finished wall chaser made from a grinder with your own hands is in the video:

Rules and restrictions when gating

Wall slitting should be done only after a plan for the location of hidden electrical wiring or water pipes has been drawn in the room.

When performing gating work, it is important to consider the following factors:

Procedures are usually carried out only in the vertical or horizontal direction.
The slope of the groove is allowed in exceptional cases.
Horizontal grooves are made at a distance of no more than 15 cm from the floor slabs.
Vertical grooves must be at a distance of at least 10 cm from door and window openings, as well as corners. At least 40 cm from gas pipes.
The width and depth of the groove should not be more than 2.5 cm. The length of the groove should not be more than 3 meters.

In conclusion, it is worth noting that before starting work, you should prepare not only the appropriate tool, but also make a control check on the location of the groove.