Wall chaser - attachment for an angle grinder: how to make a wall chaser with your own hands, drawings and diagrams

To install communications in the walls, you will need to use a specialized tool - a wall chaser. It is rational to buy it for professionals who are engaged in repair and construction work, in particular for electricians, plumbers, plumbers, etc. If repairs are carried out independently in a house or apartment, then it is not necessary to buy a specialized tool, since you can make a wall chaser attachment for an angle grinder. How this can be done with the least investment is described in detail in the material.

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 The outdated equipment was replaced by a wall chaser for aerated concrete - a hand-held tool that has many advantages: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.

Purpose of a wall chaser, what can you do with it?

A highly specialized tool called a wall chaser is similar to an angle grinder or simply an angle grinder. A wall chaser, unlike an angle grinder, is designed directly for making grooves in walls with further installation of various communications in them, such as wires and cables, water and sewer pipelines, as well as other devices.

The wall chaser has two parallel disks for concrete; the distance between them can be adjusted depending on the technological task. This allows you to prepare a groove in the wall of the required width. This highly specialized tool also has a function for adjusting the depth of the groove being made. The required value of groove deepening is selected by moving the cutting discs, and depending on the technological task.

A wall chaser is quite expensive, and it is used exclusively for chasing walls, so not everyone can afford such a purchase. To avoid having to buy a highly specialized tool, you can make it yourself from a grinder. The design of a wall chaser is similar to an angle grinder, so it makes sense to use a grinder to make a tool for making grooves in the wall.

This is interesting!
A grinder without additional devices can be used as a cutting tool, for which a special diamond disc for concrete should be fixed in the spindle of the device.
The inconvenience of using an angle grinder as a wall chaser is that adjusting the depth and width of the groove requires skill from the worker. A special casing made by yourself will help replace this skill, and at the same time simplify the process of wall slitting. The special casing on the angle grinder allows you to get the following advantages:

1. Savings on purchasing specialized tools
2. Ease of work
3. Carrying out dust-free work on making grooves in residential and non-residential premises

In addition to a specialized wall chaser, you can make a groove in the wall for laying communications using the following tools:

• Grinder or angle grinder of different brands
• Hammer
• A hammer with a chisel is the simplest and most economical option, but the rationality of its use is determined by the volume of planned work

Manufacturers produce wall chaser attachments for angle grinders, which can be purchased at any tool store or ordered in an online store. By purchasing such a nozzle, you eliminate the need to make it yourself. However, the process of making a frame for an angle grinder is not difficult, and to make it you will not need any additional expenses.

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.

Nozzles for grinders for grooves

The wall-cutting attachment for the grinder should include:

1. Installing a second saw blade.
2. Socket for connecting a vacuum cleaner.
3. A protective cover to protect workers from construction debris that appears during work.
4. A seat for fastening the cyclone of a suction vacuum cleaner.

The basic conditions for the functionality of such an attachment are as follows. The grinder must have a sufficiently powerful drive (at least 1500 W), and the length of the shaft on which the main saw blade is installed must be sufficient for mounting an additional disk, with the help of which the second wall of the groove will be formed.

The diameter of the saw blade itself is also important, on which the safety of work and the depth of the cut groove depend.

The type of bearings on which the shaft rotates is also important: the presence of a second disk increases the unevenness of the load, so conventional ball bearings, the permissible axial force on which is small, will fail very quickly, with a corresponding jamming of the shaft and failure of the equipment. A tool with needle or roller bearings is required.

Finally, when the shaft rotates, the movement of the saw blade should be towards the worker, and not away from him (in the latter case, the total torque will push the grinder away from the groove obtained with its help).

A purchased wall chaser attachment for an angle grinder is prepared for work like this. The protective casing is removed from the gearbox. An additional bushing is mounted on the main shaft, which securely compresses the shaft using a clamp fastening.

The first diamond disk of the required diameter is installed on the shaft - from 150 to 230 mm; larger sizes will lead to an increase in the cantilever load on the bushing. It is not recommended to replace the diamond disc with another one, especially if grooves need to be made in concrete. A support washer is placed on the sleeve (usually, professional nozzles come with several such parts of different thicknesses, which determine the width of the groove).

The vacuum cleaner attachment is secured to the dust extraction cone using regular tape. The grinder gearbox is attached to an extended control handle. It should be noted that any wall chaser attachment for an industrial grinder has a seat for a removable handle, which is unified with a standard handle from the same manufacturer of the main tool. This is a limitation of the design under consideration.

After this, check the alignment of both disks, attach the housing to the lever support, set its stroke, and check the reliability of fixation of all elements of the nozzle at idle, and then during the working stroke.

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.

If you use a grinder instead of a wall chaser

It is clear from the design that, in extreme cases, the machine for making grooves can be replaced with an ordinary grinder - put a concrete disc on it and make the necessary cuts in two passes. This is actually done if one small groove is needed, but practice and multiple reviews show that the dust after such a groove will settle for a long time, which can stall the whole work.

If it is necessary to make several grooves, the loss of time will be significant, and if such work is performed with some frequency, then the method becomes ineffective. Other disadvantages of this method are the inability to maintain the same dimensions of the groove edges and their depths. This cannot be called a significant drawback, but sometimes it can lead to a piece of the wall falling off when the core of the groove is hollowed out.

If the length of the mounting shaft allows, then you can put two concrete discs on the grinder at once and then the groove will be cut in one go. Even if we do not touch upon the issue of safety precautions, there will be no less dust and it will settle at the same speed. As a result, the time gain is insignificant, and the risk of injury increases by an order of magnitude.

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.

Accessories for grinding machine

Considering that the design of a furrower is similar to a grinder, craftsmen have learned to make wall chasers from an angle grinder with their own hands. These mechanisms cut concrete walls without dust; for this they adapt a vacuum cleaner. Installing a groove in a concrete wall is a difficult task. Powerful machines are used for this operation. This is not possible at home, so craftsmen use a grinding machine and a diamond wheel to cut concrete. To reduce dust in the room during operation, install a homemade nozzle connected to a vacuum cleaner.

The design of the nozzle is simple. A section of sewer pipe with a diameter of 60 and a length of 500 millimeters is attached to the lower part of the angle grinder body using construction tape. Make a 20 mm wide cut on the upper wall of the pipe end to allow the cutting tool to enter. During operation, the circle rotates counterclockwise, then all the dust and concrete fragments fall into the pipe, where they are captured by the air stream and fed into the vacuum cleaner’s storage tank.

An angle grinder is designed mainly for grinding the surface of a material and cutting metal, so a cutting tool in the form of a thin disk is used. To chisel walls, you need a grinder with two discs. Installing two drives is not difficult. To do this, you need to buy a clamping nut in the store. Then a diamond disk and a special nut are installed on the seat of the machine, on which the second diamond wheel sits and is secured with the purchased nut. The created mechanism can easily be called a wall chaser.

Homemade protective casing

Safety when working on homemade equipment cannot be neglected. All grinders have high speeds, which can cause the circle to break and injure the worker. Therefore, you need to ensure that the mechanism has a protective casing. The efficiency of work largely depends on the power of the machine and the density of the material being processed. There are many different problems that determine the optimal characteristics of choosing a diamond wheel, especially when it comes to selecting a cutting tool for high-performance cutting.

In order to reliably protect yourself from the effects of dust and damage from rupture of the cutting tool, experienced specialists suggest making a closed casing with a pipe for the angle grinder for wall slitting. The design of the homemade product is simple. The idea was taken from a standard casing, a platform, a side cheek, a pipe and a cutting depth regulator were added. Drawings for the product are made in the form of sketches as work progresses, taking into account the availability of the necessary materials. Manufacturing process:

1. The platform is made of sheet steel 2 mm thick. Base size 250x90 mm. A window is cut along the center line for the exit of the cutting wheel.
2. A hinge is welded on one edge of the base to adjust the cutting depth, and on the other there is a bracket with a slot for fixing.
3. The cheeks are made of steel sheet two millimeters thick. The shape is in the form of a semicircle, covering two thirds of the cutting tool.
4. The width of the casing is 40 millimeters. The hinge axis is welded at one end, and at the other there is an M6 pin with a wing for fixation.
5. The outer cheek has a connection for the vacuum cleaner hose and a clamp for attaching to the neck of the angle grinder.

Furrow maker for aerated concrete

Aerated concrete, compared to concrete, is easier to cut, so you can use any power tool that you have in your home workshop: a drill, a hammer drill, a hand-held circular saw. The idea goes like this. Buy a key cutter for metal, install it in a hammer drill and mill a groove according to the markings. To make the operation easier, you need to make a simple nozzle from wood. To do this, you will need two slats 300x50x30 millimeters, two pieces of wood measuring 300x150x20 mm.

Technological process for manufacturing the device:

1. Make a sled. To do this, attach two prepared slats with screws to the base, in which a hole is cut for the cutter to exit.
2. Attach a bracket made of boards perpendicularly to the base to support and secure the power tool.
3. Make a plank carriage with a hole for the neck of the hammer drill.
4. Before work, set the cutting depth by placing wooden blocks under the carriage and base.

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.

Features of working with a homemade wall chaser

The internal structure of a factory wall chaser is somewhat different from an angle grinder - it is designed for one single task, is simplified as much as possible and requires higher quality components. The force on the angle grinder shaft is transmitted through an angular gearbox and everything is designed for cleaning surfaces and cutting iron.

The forces generated when cutting the groove quickly damage the gearbox and bearings. This is facilitated by the double load on the mechanism components and the fact that the second disk is not located at the design location, which means that the force is transmitted at a different angle.

In any case, the cost of a wall chaser is an order of magnitude higher than that of an angle grinder and it is often easier to buy a new angle grinder than one furrower. But this should not prevent you from following simple recommendations that will prolong the life of a homemade wall chaser made from an angle grinder:

• It is necessary to ensure that the instrument does not overheat and, if possible, give it a rest as often as possible.
• It also wouldn’t hurt to evaluate how much faster working with two disks is than with one. A protective casing with adjustable cutting depth provides protection from dust and relatively even grooves, even if you make two parallel cuts. If unnecessary movement along the wall with a wall chaser with one disk will extend its service life, then it may be worth limiting yourself to this option.

As a result, a high-quality do-it-yourself wall chaser works no worse than the factory original, but there is a risk of quickly rendering the angle grinder, which is used as its basis, unusable. If you have to cut grooves often, then it is better to purchase your own furrower, designed specifically for wall grooves, and a grinder converted into a wall chaser is more suitable for periodic work.

Construction of a new building, as well as major repairs of old premises, including the installation or replacement of electrical wiring and other utilities. To do this, you may need a concrete wall chaser disc.

To make it possible to lay wires, cables and pipelines inside the walls, special channels called “grooves” are cut in the walls using diamond wheels and wall chasers.

Features of choosing a tool

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

1. 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.
2. 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.
3. 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.

How to make a groove in a concrete wall

The main document regulating the specifics of making grooves in any tool is SNiP 3.05.06-85. It specifies the rules for creating electrical wiring, all distances and basic safety requirements. By ignoring them, you can not only jeopardize the comfort and safety of people living in the premises, but also be fined.

Before starting work, you need to carefully mark everything, determine the location of the wiring, installation of sockets, switches and other elements. Installation is carried out taking into account the requirements specified below.

SNiP regulatory requirements for gating walls for wiring:

• Load-bearing walls cannot be tapped.
• Channels must be laid parallel to the structures: horizontally or vertically; diagonal grooves cannot be laid.
• The distance between the ceiling and the groove should be at least 15 centimeters.
• There must be a distance of at least 40 centimeters to the gas pipe.
• The depth of the groove is no more than 2.5 centimeters.
• Before laying new wiring, you need to check the walls for the presence of old ones (if it is not a new building).
• The grooves are laid exclusively vertically/horizontally; no oblique lines are allowed. An exception may be the need to lay wiring on walls with a slope (attic, for example), when the line can be run parallel to the slope of the wall.

• You can turn the groove between two points only once: each turn represents a bend in the cable, which heats up more in such places. And if there are a lot of turns, the danger of operation increases.
• The size of the grooves should be as follows: maximum width 3 centimeters, depth no more than 2.6 centimeters. The total length of the line from the junction box to the point should not be more than 3 meters.
• Optimal distances: from batteries and gas pipes 40 centimeters, to the door 10 centimeters, from the floor - at least 5 centimeters (but better than 10).
• It is forbidden to touch reinforced concrete structures during the gating process, but if you do this, do it in such a way as not to touch the reinforcement frame and with a minimum groove depth.
• It is prohibited to scratch internal load-bearing walls; on the first floors, work is carried out very carefully, since here the walls support the entire building.
• Grooving in the ceiling is carried out by calculating the shortest path to the lighting point.
• Cutting grooves in floor slabs is prohibited. When a line is laid across the floor, it is embedded in a concrete screed, which is poured taking into account the need to lay furrows.
• During the work process, be sure to take care of personal protective equipment - a respirator or mask is suitable for these purposes.

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.

How it works and how it works

The furrow maker's design is similar to that of an angle grinder. The rotation of the working disks is carried out by a powerful high-speed electric motor of the asynchronous type. Through the gearbox, rotation is transmitted to the spindle, to which diamond discs are attached. This is where the similarity with the grinder ends.

Wall cutter device

A distinctive part of the furrow machine is a voluminous casing designed to capture and remove dust. As a rule, the casing has several seats for additional handles. This allows you to choose the optimal position of the tool during operation. The casing is located on a mobile platform, which is equipped with wheels in the lower part. There can be from 2 to 4. By rolling the platform along the wall, the operator cuts a furrow along a pre-designated line. Thanks to this device, there is no need to adjust the degree of pressure and the wall chaser easily glides along the rough surface of the wall. On one side of the casing there is a pipe for removing dust. The suction tube of the vacuum cleaner is connected to it.

The vacuum cleaner hose is connected to the dust extraction pipe.

There is also a cutting depth adjustment device located on the casing body. In different models you can find different design solutions for this function. But the general principle is that the casing moves relative to the movable platform and is fixed in the desired position. The cutting depth is marked on the outside of the housing.

The ruler on the body shows the depth of the discs into the wall surface

It should be added that many wall chasers are equipped with additional electronic equipment. This increases their cost, but also increases their performance characteristics. Such systems include:

• Adjusting engine speed. Provides the user with the ability to manually adjust the disk rotation speed. This is relevant when gating walls made of various materials (brick, concrete, cinder block, foam concrete, etc.)
• Soft start system. A very useful feature for extending the service life of the tool and ensuring an increased level of safety during operation. As practice has shown, most breakdowns of this type of equipment occur when the engine suddenly starts.
• Automation of disc braking. Reduces the time of complete stop of rotation after turning off the engine, dampens inertia.
• Anti-vibration device. With its help, micro vibrations of the wall chaser are absorbed during operation. When using the tool for a long time, the operator may experience the problem of “tremor” - poor circulation in the hands.
• Motor blocking when overheated. The “weakness” of all asynchronous motors is that at high loads, the armature windings heat up sharply, even to the point of melting. Outwardly (except for an increase in temperature) this is not expressed in anything, and this is a danger - the motor may fail.

It is precisely because of the equipment with these functions that many wall chasers from such reputable companies as Bosch, Makita and others have a high cost.

But you need to understand that without them the tool will last much less time.

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 principle of operation of a wall chaser

To find out how the tool works, you need to understand the variety. According to the type of drive, all wall chasers are divided into two types:

1. Manual models are a curved pipe with handles.
   At the end of the metal frame there is a steel element that acts as a blade. It is he who cuts the groove by repeatedly pushing the wall chaser with his hands along the surface being processed. Using a hand tool, grooves are cut using manual effort.
2. Electric wall chasers work on the principle of an angle grinder.
   The tool has a body with handles. An electric motor is installed inside. Depending on the model, 1, 2 or even 5 diamond discs are put on the spindle. The casing covering the cutting wheels is designed differently from that of an angle grinder. It is closed on both sides and in most models it is equipped with a connection for connecting a vacuum cleaner. Electric wall chasers have a diamond disc as their working element.

Before using any wall chaser, markings for the grooves are first applied to the processing surface. The next steps vary depending on the model you are using.

It will not be possible to cut a perfectly smooth groove and the same depth in all areas using a hand tool.

Hand tools are often used to cut grooves on foam blocks when building walls to perform reinforcement. Ideal evenness and the same depth in all areas is not important here. After laying the reinforcement, mortar will still be poured into the groove. If you cut grooves on the wall for wiring, then it is optimal to fasten a guide board near the marking line to ensure the groove is even. The wall chaser is pulled with your hands from top to bottom until the blade cuts the groove to the required depth. At the end of the work, the guide board is moved to another section of the wall and the steps are repeated.

Working with an electric wall chaser is no different from using an angle grinder

Before you start using the electric wall chaser, use the adjustment mechanism to set the cutting depth on the casing. The markings are applied taking into account that the groove will be slightly to the side. The fact is that during gating they follow the lines with the side of the sole. If you try to immediately cut with a disk according to the markings, the groove will turn out uneven, since it is not visible under the tool casing.

The cut is made from top to bottom. After cutting the entire strip, the central part remains between the cuts. It is knocked out using a hammer and chisel. To speed up the process, you can use a hammer drill.

The caveat of working with electric tools is the formation of a large cloud of dust. If the repair is carried out inside a living space, it is optimal to connect a vacuum cleaner to the wall chaser casing. Manufacturers provide special pipes for this. During gating, only a small part of the dust gets inside the room. The bulk of the dirt is sucked in by the vacuum cleaner.

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.

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.

Expanding the functionality of a homemade furrow maker

It is not always possible to say in advance what the depth of the furrows should be for laying electrical wiring. Therefore, it will be necessary to slightly improve the homemade wall chaser and provide it with the function of adjusting this parameter. There is nothing complicated about this:

• The lower part of the protective casing is made from several thin corners;
• attach it to the top using a long adjusting screw;
• if necessary, adjust the depth of cut, simply rotate the screw in one direction or another;
• fix the lower part in a given position using a fastening bolt:
• To prevent dust from leaking out after lifting the casing, removable side panels can be used to provide additional protection.

All of the above recommendations allow you to save money and make a furrower that is practically no different in functionality from a professional tool

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.

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:

1. 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
2. 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
3. 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
4. Based on the template, make a cover using chipboard
5. 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.
6. 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.

The nuances of making a protective dust cover

When making a protective screen, it is possible to adjust the cutting depth. The case consists of a hinged support plate and an attachment, which is attached to the body of the angle grinder.

Cotter pins or locking rings are used to secure the axle. A semicircular plate with a slot for a bolt is provided on the base, and 1 or 2 springs are installed on the rear edge.

Some craftsmen attach plastic rollers to the bottom of the sole, which reduce the effort when moving the tool along a concrete or plastered surface.

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:

1. Procedures can be carried out in vertical or horizontal directions
2. It is possible to ditch at an angle in extremely rare cases when it is necessary to bypass a decorative element or communications
3. Horizontal grooves must be carried out exclusively at a distance of up to 15 cm from the floor slab
4. Vertical grooves must be located at a minimum distance from doors and windows of 10 cm
5. 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
6. 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.

Disc for wall chaser: main types

Modern industry offers a wide selection of cutting tools for processing stone materials: concrete, brick, granite, paving slabs, etc. Depending on the volume of tasks performed, the following is used as a drive for a diamond wheel: a manual universal angle grinder (“Binder”), a manual wall chaser and a stationary cutting machine.

Diamond blades for processing “stone materials” have a number of advantages: durability, high cutting speed and high cut quality. In general, a diamond disc for a wall chaser for concrete is a “base” - a metal disc made of tool steel. “Diamond cutters” are fixed along the outer perimeter of the disk using laser welding.

Diamond cutters, in turn, are diamond chips sintered into a single unit with metal powder. In the center of the disk there is a landing (precise) hole of different diameters. Depending on the purpose and cutting technology, the design of the discs has the following features:

• Dry cutting tool. It is a segmented disk. Diamond chips are located along the perimeter of the tool in sectors. Between the sectors, to localize thermal stresses, technological slots are made, ending with a technological radius boring;
• Wet cutting tool. It works in more gentle conditions, so the diamond cutters are located along the perimeter of the disk in a continuous strip. To localize thermal stresses, holes are punched evenly around the perimeter of the disk. A prerequisite for operation is the supply of water to the cutting area for cooling;
• Tool for cutting reinforced concrete (reinforced material). Discs of this type are distinguished by an increased thickness of the base (disc) and an increased content of diamonds in the diamond-metal “bundle”.

The marking of a diamond blade, as a rule, contains three main parameters, indicated in millimeters:

• Outside diameter. Selected depending on the required cutting depth;
• Disc thickness. Selected depending on cutting technology. Not always indicated in the labeling;
• Bore hole diameter. Selected depending on the spindle mounting hole of the existing power tool; grinders, wall chasers, cutting machines, etc.

An example of marking is a Husqvarna -D 125/22 UP diamond disc: outer diameter 125 mm, bore diameter 22 mm. Disc thickness is not specified. This indicates that the disk has the minimum possible thickness.