Diamond grinding cups for concrete: types and methods of use

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Types of grinding cups for concrete

Concrete, marble, granite or ordinary brick, if necessary, are ground. This can be done with a grinder on which diamond grinding cups for concrete are installed, which are durable metal discs with diamond particles embedded in the base.

Such a tool is practically the only one that can withstand the high hardness and strength of such building materials. The article suggests getting acquainted with the features and types of diamond cups.

Types of Diamond Cups

Cups are divided into several types, each of which performs a different grinding task. The classification is based on the shape and number of cutters. Disc types:

1. The grinding segments are arranged in one row. This product has a relatively low weight, but quite high performance. The downside is that it is very difficult to keep it in the required area.
2. The cutters are arranged in two rows. These products are very often used for roughing. The placement of cutting elements allows you to very quickly deal with absolutely any defects not only on concrete, but also on natural stone, as well as sandstone. This type of cup only performs rough processing. For final finishing you will have to use a different nozzle.
3. "Square". This disc is quite heavy. It is also needed for rough processing. During the process, in addition to grinding, chipping also occurs. This allows you to significantly speed up work and reduce wear on the product. In almost all cases, such a cup is used for preparatory work, after which some kind of polymer composition will be applied to the concrete. This is a very rough sanding product that leaves a rough surface.
4. "Typhoon". Designed for finishing work on very hard and dense materials. This bowl wears out for quite a long time, which provides long service life. The surface of the disk itself has a special shape, thanks to which particles are removed efficiently.
5. "Turbo". On the surface of the disk, the cutters are located almost in one row. This allows for very precise sanding. This attachment is used in cases where high surface quality is required. It can be used to create chamfers and edges on various types of tiles. Even engravers and stonemasons use the cup. This type also has a very high degree of wear resistance.
6. "Boomerang". Intended for finishing work, when the material must be handled with extreme care. Diamond inclusions are small in size, which makes it possible to perform delicate processing.

The nuances of polishing the ceiling

The technology for sanding a ceiling for whitewashing or painting is no different from the methods for processing walls. However, the best option for eliminating defects on the surface would be wet grinding - a mesh or sandpaper is dipped in water and the ceiling is treated with a wet tool.

There is almost no dust, wet particles contribute to faster and better leveling, but the work time will double, since drying time will be required after each pass.

After sanding, the ceiling must be cleaned of dust, treated with an antifungal agent and primed.

Advantages and applications of polished concrete floors

Treated concrete floors have gained great popularity among finishing coatings not only in the public but also in the private category. It is mainly used:

• in medical and educational institutions;
• in shopping and sports centers;
• in water parks;
• in entertainment establishments;
• at cultural venues;
• in suburban areas;
• as a floor covering in outbuildings and garages;
• Increasingly, polished concrete floors can be found in dressing rooms and corridors in the homes of ordinary citizens.

It has earned such a wide range of applications due to its performance characteristics, which in many ways exceed the advantages of even the highest quality finishing coatings:

• the service life is estimated at decades, which is ensured not only by its increased strength characteristics, but also by its resistance to moisture saturation. An ordinary concrete screed without a finishing coating or treatment does not have such significant advantages;
• the floor sanded to a gloss is similar to elite self-leveling coatings;
• affordable cost;
• is an ideal basis when a perfectly flat base for a decorative coating is required;
• does not produce harmful dust during operation;
• grinding makes it possible to level substrates even with strong relief;
• does not require periodic repairs. If such a need arises, then making a “patch” will not be difficult.

In order for the topcoat to retain these properties for as long as possible, the poured concrete floor must be properly sanded. If the filling is old, not only the decorative layer, but also the main layer is polished. If a new concrete floor is installed, laitance will need to be removed. Also, grinding concrete surfaces with special tools is an integral part of preparing the base for self-leveling floors.

Be careful and do not fall for the common misconception - grinding does not solve the problems of adjusting the relief surface. Leveling is carried out at the stage of primary pouring or re-driving of the concrete layer.

Each type of work has its own disk

It is important to use your own disk for each type of work. Cutting wheels cannot be used for stripping and vice versa. Based on this, it is possible to divide the types of disks by type of work.

• If it is necessary to cut or saw, then use cutting discs.
• If you have to cut wood products, use saw blades.
• If you need to peel off old layers of paint and varnish materials and primer or make the surface smooth, you need a roughing or grinding disc.
• You can process metal, wood, and plastic products with a flap disc.
• For final polishing of surfaces, a polishing disc is best.

Flexible circles

The turtle is an elastic circle on which a layer of diamond powder and an adhesive polymer mixture is applied. The unique feature of this type of grinding wheel is that it can be used to process surfaces in hard-to-reach places. The flexible wheel for an angle grinder has high productivity and cutting ability that exceeds the similar characteristics of a conventional cutting disc by several times.

The turtle is used not only for processing building materials. It is used to polish granite, marble, precious stones and glass. If ordinary cutting wheels for grinders cannot be used for industrial devices, since they may not fit in size, then with a flexible disk the situation is completely different.

Modern industry is able to offer any working circles for power tools. All that remains is to choose the one suitable for the material being processed. You can opt for universal diamond wheels for an angle grinder, but you just need to take into account the amount of work ahead. Or maybe you should immediately buy both a flexible disk and a diamond cup to do everything quickly and efficiently.

Description and classification

A diamond disk is a metal circle of small thickness with cutting diamond plates fixed on the edges. They are made from industrial ground diamonds, which are pressed into a metallic binder - carbide, steel or titanium. The plates are attached to the disks using silver soldering or laser welding. Modern technologies connect the cutting tool to a metal base using powder soldering. This way they last longer. Once the cutting part of the diamond blade has been sharpened, it is completely ready for use.

In order to cut reinforced concrete or concrete, a variety of equipment is used, such as stationary machines, wall chasers, gas cutters, and grinders. Different brands of circles are attached to them. Their distinctive features are:

• Working edge configuration.
• Composition of the binder.
• Number of diamonds per unit area.
• Quality indicators of diamonds.

To choose the most suitable option for you, you need to familiarize yourself with the classification.

Circles are divided into groups according to several criteria. The most important indicators are: the purpose and shape of the cutting part.

Diamond cutting discs

This group is divided into three subspecies. These include:

1. Segmental for dry cutting. Concrete is cut dry using hand tools. For these purposes, a grinder (angle grinder) and a wall chaser are used. On the base of the segmented circle, the diamond contour is located in the form of separate sectors, and between them there are radial through grooves. During the cutting process, the plates experience heavy loads and the discs heat up. The slots are necessary to relieve stress in the cutters, remove waste, remove heat and compensate for linear expansion. This group includes diamond tools for cutting fresh concrete. The difference between such circles is that they can be used to cut material immediately after hardening. The diamond layer is usually filled directly onto the body without using a binder.
2. Infinite (whole). There are no segments on such circles. And in order to distribute the tension, there are holes. They are used when cutting is carried out with water cooling. Wet processing is carried out on stationary equipment. Such equipment has the design ability to supply coolant.
3. Diamond discs for reinforced concrete. These discs have a segmented design, but the teeth contain more diamonds than a conventional disc type. They are a little thicker. It is necessary to take into account the fact that reinforced concrete is very difficult to cut at home. The grinder heats up quickly, dust penetrates inside it (to prevent dust from penetrating, dust protection for the bearings and a dust-proof motor are necessary). Using a hand-held power tool, it will be possible to cut reinforced concrete no deeper than 10 centimeters in one go. After this, the equipment will turn off to cool the disk and motor.
4. Turbo segment diamond cutting wheels. They are solid, and their cooling is carried out due to the wavy surface. Their price is higher than regular circles, but they compensate for these costs with expanded functionality and a long service life. They can even cut reinforced concrete if the diameter of the reinforcement does not exceed 10 centimeters.

Diamond grinding discs

These wheels are used to grind concrete if it is necessary to level the floor before applying a decorative coating. This process is carried out with a special grinder or grinder. Grinding wheels differ in that the cutting diamond layer is applied to a conical annular surface that protrudes along the edge. A diamond disk for mechanical floor processing is a main circle on which several grinding cups are attached, between which there are grooves for removing dust.

How to choose a diamond cup

To produce high-quality processing of a stone or concrete surface, you should carefully consider the choice of a diamond cup. Depending on the type of planned work, the diameter of the nozzle is selected - from 110 to 180 mm. To process small areas where careful sanding is necessary, you need to choose a small cup size. The greatest demand is for 125 mm concrete discs. There are nozzles with a diameter of more than 200 mm. Processing concrete with the help of such a cup is much faster. However, it should be remembered that as the diameter increases, the price also increases.

In accordance with GOST, the diameter of the mounting hole varies from 19 to 22.2 mm. The mounting hole must match the tool that is intended to be used. A loose cup fit can lead to injury and rapid wear of the diamond layer. But usually the attachment kit includes an adapter ring that allows you to use them with tools of different diameters.

All diamond grinding discs for concrete have special markings. It reflects the main characteristics in the following sequence:

• diameter of the outer circle (for example, 125);
• cup depth (40);
• working surface width (10);
• segment height (3);
• mounting hole (22).

All parameters are indicated in millimeters. The brand of diamond powder and the diamond content are specified separately. As a rule, it is 100%, but it can be less or more

Particular attention should be paid to the grain size (for example, 125/100 µm). Large fractions are suitable for rough grinding and roughing work, small fractions are suitable for fine polishing

The nozzle is selected to match the existing tool. The maximum permissible rotation speed of the disk must correspond to that of an angle grinder, since the safety of work depends on this. Each type of diamond cup has rotation speed restrictions. For example, for double-row cups it is 13,300 rpm.

The weight of the attachment and its balance are also important parameters when choosing a tool. The speed and comfort during surface treatment depends on this.

Selecting a sanding cup

Concrete grinding cup 125

Only a well-chosen grinding cup helps to process concrete efficiently and quickly. In addition to the individual characteristics of the tool, its mounting diameter must correspond to the parameters of the angle grinder used. The standard disc is a 125 cup for concrete grinding, the diameter of its mounting hole is 23 mm.

When choosing a tool, the following should be taken into account:

• Grinder power;
• The rotational speed of its shaft. It must correspond to the maximum permissible number of disk rotation speeds. The more accurate this ratio is, the safer the work will be;
• The presence of an adapter ring included with the nozzle allows the cup to be installed on any equipment;
• Disc weight and balance;
• Availability of good heat dissipation mode. This will increase the service life of the tool without loss of technical characteristics.

When choosing a diamond cup, you need to consider a number of characteristics:

• Sanding type: dry or wet. The wear resistance of the tool and the quality of the resulting surface depend on this;
• Purpose: hardness of the sanded material;
• Height of segments: High segments may sand faster, but in the end the surface will be rough with a high abrasive layer. Finish grinding is performed using diamond cups with a low segment height;
• Circle diameter. This parameter is determined depending on the conditions and scope of work, and the allowable space in the equipment;
• Tool cost. Often, expensive equipment has greater reliability and performance. In an inexpensive cup, diamonds may be of fairly low quality, which will not have a positive effect on the results of the work.

Varieties

Based on the shape and number of diamond segments, cups are divided into several types, each of which is designed to work under certain conditions. Depending on this, the scope and purpose of the instrument changes.

The double-segment diamond cup is excellent for roughing sandstone, natural stone and concrete surfaces. The special profile allows the master to eliminate all defects in the material as efficiently and quickly as possible. The tool performs rough surface treatment, so to achieve a better result it is necessary to use a different attachment.

A cup with segments in one row has greater productivity and less weight, but it is noticeably more difficult to hold on the surface.

The segmented “Turbo” model is made in the form of a continuous row of diamond inclusions, which ensures the most accurate grinding of the working surface. It makes sense to use this attachment if you need to obtain the highest quality sanded surface. Using it, you can easily create edges and chamfers from granite and marble slabs. “Turbo” is often used by stone engravers when working on stone monuments. In addition, the attachment makes it relatively easy to create various bends on the surfaces of stone slabs. For more precise processing of stone surfaces, special diamond bits with a diameter of about 100 millimeters are sold in specialized stores. They are often used by professional craftsmen. In addition to increased accuracy, such models are distinguished by a long service life.

Model "Boomerang"

When doing finishing work, it is important for craftsmen to handle the material being processed as carefully as possible. For this purpose, a “Boomerang” diamond cup is usually used, the small diamond inclusions of which ensure the most delicate processing.

This attachment is especially popular among craftsmen, as it provides a softer and more stable stroke than double-row cutters, while not being inferior to them in terms of productivity.

Typhoon nozzles. Allows grinding and roughing work with hard and super-dense materials. With low weight they have a long service life and high wear resistance. And thanks to the special shape of the disc, the most effective removal of particles of ground material is achieved.

Diamond cup "Square". Standing out for its large mass, it is intended for coarser grinding. During operation, in addition to conventional grinding, the attachment provides the effect of chipping the material, which significantly reduces tool wear and increases the speed of work. Typically, the “Square” nozzle is used by craftsmen to process material before directly coating the surface with polymers. It is considered a rather rough cup, after which the surface is more rough, which in turn increases adhesion to other materials.

Grinding technology

After preparing the tool, you can begin grinding work. You need to sand each subsequent layer after it dries. Consequently, this operation is performed at least 2 times, on the starting and finishing layers of putty. In practice, this is at least 3 times.

It is recommended to treat the main area of ​​the wall with a power tool, but the surface of the walls in the corners and places adjacent to the ceiling and floor will have to be leveled manually. It will be easier and faster. The procedure is as follows:

Do not press hard on the instrument. This can lead to holes being rubbed into the putty layer. The processing technology for finishing and starting putty is the same. However, the last layer is sanded more carefully with minimal pressure on the tool. Constantly check the surface with a lamp for defects.

Definition

Diamond cups are discs with cutters that are located on one side of the product. The mount is located on the back of the tool. There are a lot of diamond chips fixed in the equipment.

Builders use a cup with a diameter of 230 millimeters for polished concrete surfaces, since the tool can withstand heavy loads. Diamond cup 125 is a durable metal disc with diamonds embedded in its base. The diameter of such discs is 100-230 millimeters, but most often specialists use a diamond cup with a diameter of 125 millimeters. The discs are installed on a manual grinding mechanism - an angle grinder

How to sand corners

Grinding of corners should be done after processing the main surface of the wall. This is best done using sanding sponges or a block. We wrote about the puttying of corners itself here.

choose a sauna stove according to parameters

Domestic

When processing internal corners, simply apply the tool to the surface and move it from top to bottom. After this, check the result and, if necessary, repeat the action. First, one side of the corner is processed until it is completely ready, and only after that can you begin to grind the second.

External

When grinding external corners, it is convenient to use a flat lath, which is applied to one side of the corner along its cut. The movements of the grater are circular and spiral. The work with the lath has to be done by two people, but as a result, grinding is faster. In addition, the lath allows you to use a power tool to process external corners.

Scope of application

The high reliability and wear resistance of the diamond cup make it unrivaled among other equipment for processing hard materials. Using the nozzle, you can scrape and grind concrete, brickwork, stone slabs, porcelain tiles, and paving slabs. Diamond discs are widely used for polishing natural stone - marble or granite. Operations performed using discs include rough, profiled and finishing grinding operations. Diamond cups are used for the following purposes:

• removal of screed sagging;
• roughening;
• alignment of seams;
• grinding joints;
• surface cleaning;
• removal of old or protruding layer;
• final polishing.

When installing attachments on an angle grinder, a dust extractor is usually used or the surface to be treated is moistened with water (wet grinding). This will help reduce dust and make cleaning easier.

are widely used during dismantling work. They effectively remove layers of used glue, hard-to-remove coatings (epoxy, plaster, plaster) and have a long service life. Grinding with a diamond cup saves time: it not only removes unnecessary layers, but also immediately levels the surface.

Scope of use

Diamond cups come first when processing hard rocks and materials; they will help with roughing and finishing masonry, slabs, and concrete. They are ideal for polishing natural rocks such as granite or marble. First of all, rough processing is carried out. After this, a final cleaning is done.

Diamond blades perform the following functions:

• cleaning out irregularities;
• removal of protruding elements;
• alignment of joints;
• polishing seams;
• smooth surface cleaning;
• finishing;
• elimination of old layers.

Good to know! When sanding, you should use a vacuum cleaner or pour water onto the surface being processed. This procedure will make the work much easier. The amount of deposited dust will decrease significantly.

Recommendations for handling

During grinding, moderate pressure should be applied to the grinder. Pressing too hard can overheat the bundle, which will negatively affect further processing and reduce the resource of all elements. The pressure should also not be too low. In this case, the second layer of diamonds on the working surface of the cup may not open after erasing the first.

If the product stops removing the treated layer, then you should not throw it away. Most likely, it is necessary to remove the upper ligament and the new diamond layer will reveal itself. When working with granite stone, the disc often wears out and stops grinding. In this case, the best option would be to run a rotating cup along the plaster. The latter will serve as an abrasive. The rubbed layer will be removed. After this, the disc can be used to further process the surface.

Varieties

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Metal discs for concrete work are divided depending on the application into:

1. The “double segment” is used for rough work on concrete, eliminating defects in the concrete surface and uneven screed layer.
2. “Boomerang” is used when carrying out finishing work. Diamond blades “Boomerang” are used for delicate processing of materials; they are distinguished by their low weight, high productivity, and soft operation.
3. “Dolphin” is a gentle tool, wear-resistant, productive, and light in weight.
4. Square diamond cups are the heaviest and are used for rough processes. They level concrete and increase its adhesion to other materials, in particular polymers.
5. “Turbo” and “Typhoon” are the latest developments among grinding profiles. They have high performance, wear resistance and are used for processing dense concrete and other dense materials.

Tools with the addition of diamonds are highly effective; they qualitatively prepare concrete surfaces for the next stages of work and finishing.

Types of milling cutters for concrete

Diamond cutters are one of the types of cutting tools that are used to process concrete surfaces using special grinding machines. This tool can be in the form of a disk or an end, cylindrical, end, or key attachment. Mills for grinding concrete are a metal body onto which diamond segments are soldered.

The cutters can have an annular, trapezoidal and triangular shape. Each form is convenient and effective to use. The choice of cutter shape depends on the type of grinding machine.

The round diamond concrete cutter is used in CO type mosaic grinders for processing hard materials such as concrete, paving slabs, marble, etc. It is recommended to use coolant when grinding with this tool.

The triangular diamond concrete cutter is used for processing medium and hard abrasive surfaces. This tool is intended for completing CO type grinding machines. When working with it, cooling is also necessary.

A trapezoidal concrete cutter is also called “Frankfurt”. Such cutters are installed on GM type mosaic grinding machines and are used for grinding concrete, marble, granite, paving slabs, and hard refractories using cooling.

As you can see, diamond grinding tools can be made in different versions, which significantly expands the choice of necessary equipment depending on the requirements of the work being carried out.

Here is a video about diamond grinding discs for concrete:

Working with a grinder on porcelain stoneware

Porcelain stoneware is a popular material in the decoration of buildings due to its high strength. The advantage of the material during its processing turns into a disadvantage. Tiles are difficult to cut and quickly wear out the tool. Cutting porcelain tiles without chipping is a real art.

We cut porcelain tiles

Of course, you can purchase an industrial tile cutter and not have any worries. This machine is called a “wet cutter” because liquid cooling is used during operation. This solution is suitable for construction teams.

Cutting porcelain tiles with water using a wet cutter

For home use, buying such equipment is too wasteful. Moreover, with due care, you can get by with a household grinder and a high-quality disc - a dry cutter.

Disc for cutting porcelain stoneware without water - dry cutter

The diamond cutting wheel for porcelain stoneware must be solid, non-segmented. Its thickness is as minimal as possible, just to ensure the strength of the disk. Some tricks from experienced professionals:

1. The direction of movement of the grinder must coincide with the direction of rotation of the disk. Otherwise, the number of chips increases sharply.
2. Since it is impossible to achieve a complete absence of chips, it is better to make the cut not along the marking line, but with an indentation of 1-2 millimeters. The remaining material can be removed using a stone grinding disc. If the cut is not specific, this rule can be neglected.
3. The cut must be done in one pass. With each subsequent passage, the number and size of chips increases.

Main characteristics

Double-row bowls are considered more productive.
To make cups, a metal alloy and small fractions of diamonds are needed. This composition must be compressed in special forms. Since this grinding equipment is used for various purposes, it differs in several ways:

• type of binder;
• crumb size;
• location and type of cutters on the cup.

In addition, discs can be double-row or single-row. Double-row ones are considered more productive. They also have a long service life. At the same time, such discs are more expensive than other models.

With the help of a nozzle, builders are able to smooth out sagging and other defects that arise when molding a cement mixture. High-quality grinding allows you to make concrete walls smooth. This results in a perfectly polished surface. Cups are often used for various construction works. For example, when dismantling formwork from structures, nozzles are indispensable for leveling seams. However, they also have other advantages. Thus, they are used for the restoration of concrete products.

In addition, high-quality grinding discs weigh little, grind the surfaces of concrete structures well, allow you to restore old products, and are considered highly productive. With proper handling, the equipment will serve you for many years. Metal circles are produced with a diameter of 150-180 millimeters. Diamond equipment can be used both for grinding surfaces and for drilling concrete.

Rating of quality diamond cups for 2022

Inexpensive

Trio Diamond TCW153

Double-row, used in conjunction with angle grinders. Professionals use it to level concrete structures, brickwork, granite and stone sculptures. During operation, no water supply is required to cool the surface.

The design of the disk allows it to be used for a long period. The performance is much greater than that of a simple model. Users typically perform rough sanding using electric machines.

Cost - 550 rub.

Trio Diamond TCW153

Advantages:

• no water supply required for cooling;
• long period of operation;
• removes uneven layers efficiently.

Flaws:

• not found.

Sibrtech 72955

Designed for installation on hand-held electric tools, it can efficiently polish brick, concrete, stone, granite and marble. After treatment, the surface will have good smoothness. Small roughness will disappear without a trace, the treatment area will delight the eye with its mirror cleanliness.

The design can remove a thick layer of concrete. Sagging and seams will be removed in a short period of time. If the thickness of the layer being removed is very large, then processing is done in several stages.

The cup is also suitable for rough grinding, creating a rough base (with subsequent application of other materials), and preparing for puttying. The electric machine must have sufficient power. During operation, it is necessary to control the degree of pressure on the tool.

Cost - 660 rubles.

Sibrtech 72955

Advantages:

• high wear resistance;
• excellent surface treatment;
• You can perform a wide range of work.

Flaws:

• not identified.

SPARTA 729905

Double-row, capable of high-quality cleaning of durable materials such as granite, stone, marble, brick and concrete. Users purchase it for rough processing of material; it is capable of removing a thick layer of hard surface. Seams and convex irregularities will be eliminated in a short period of time. After treatment with this nozzle, the surface will acquire a rough appearance.

The double-row design is convenient for grinding sandstone and stone. Many builders use it to remove excess layer of screed. However, it is impossible to do fine grinding with this cup. The surface becomes rough. It can be coated with another material or finished. But this will require a different nozzle with different characteristics.

Cost - 457 rubles.

SPARTA 729905

Advantages:

• convenient to remove large differences on concrete structures;
• can remove a thick layer of hard surface;
• unevenness will be eliminated in a short period of time.

Flaws:

• It is impossible to do fine grinding.

Boomerang SIBRTECH 72956

Installed on hand tools. You can grind stone, marble, concrete and granite. Designed for finishing, smoothing small differences and roughness.

This name is due to its appearance. Its diamond segments resemble the shape of a boomerang. The disc contains fine diamond chips. The surface after grinding becomes mirror-like. There are no roughness or nicks on it.

The cup is light in weight. This makes it convenient to use. Most often installed on an electric grinder. It is popular among professionals. The cup has high performance, which is several times higher than other analogues. Many people prefer the device due to its high wear resistance and lightness.

Cost - 580 rub.

Boomerang SIBRTECH 72956

Advantages:

• long service life;
• excellent balance;
• easily copes with its tasks;
• during operation, the disk does not go sideways or deep;
• after processing 1.5 m2 of surface, the thickness of the ridge does not change.

Flaws:

• not found.

Turbo SPARTA 729955

Available in two variations (turbo and solid). It is used for finishing surfaces that do not require cleaning off a thick layer. Materials that can be sanded include marble, stone, brick and concrete.

Diamond elements are mounted around the circumference, on the entire working plane. The cutters are located perpendicular to the direction of rotation of the disk. The distance between them is minimal. From the outside it resembles a solid circle. The look of the "Turbo" cup is similar to corrugated material. A large number of segments will cover any surface. Therefore, the disc is used for fine grinding of concrete surfaces for small volumes of work. It is also used in the manufacture of all kinds of figures. The attachment will help polish corners, curves, and create all kinds of chamfers and edges.

Cost - 460 rubles.

Turbo SPARTA 729955

Advantages:

• you can make all kinds of shapes;
• performs a wide range of work.

Flaws:

• not found.

average cost

AShK DIAMASTER COBRA Premium Ø 125mm boomerang for concrete

Designed for manual grinding machines with a seat of 22.2 mm. On the cup there are “Boomerang” segments, which are coated with diamond coating. It has a distinctive feature - increased resource. The circle also quickly removes the top layer of the surface being processed. Most often used for grinding concrete.

The form has optimal performance. This design allows you to clean off large irregularities and differences in a short time. You can easily remove the sagging that often remains after pouring the floor.

Cost - 1700 rubles.

AShK DIAMASTER COBRA Premium Ø 125mm boomerang for concrete

Advantages:

• quickly removes the top layer;
• increased resource;
• quality.

Flaws:

• not found.

Diamond Segment Grinding

The cup has undergone heat treatment. It has large grinding segments. It stands out for its high processing speed and long service life. According to the instructions, you can grind materials such as glass, granite, marble, ceramics, artificial stone and much more.

It is used for finishing buildings and rooms that have marble floors, decorated concrete walls, and granite coverings. It can be used to remove chamfers, edges and cut geometric shapes.

Anyone can polish wooden structures, metal and many other materials with their own hands. The cup is installed on both electric and pneumatic tools.

Cost - 1500 rubles.

Diamond Segment Grinding

Advantages:

• heat treatment;
• long service life.

Flaws:

• not found.

BISON Master 33376-125

Installed on grinding machines with a power exceeding 950 W, it is intended for leveling surfaces and cleaning surfaces from paints and other hard materials. Granite, concrete, artificial and natural stone can be processed. The system does not require a water supply. The cup has the necessary wear resistance and can be used for a long time.

The working part of the disc is synthetic diamond, which is made using a special technology. The element has increased strength and hardness. The base is made of steel. During production, products undergo strict control. The best specialists monitor the quality. The cup gains high speed during operation. In this regard, the balance of the disk is of great importance.

The system does not require water supply for cooling. Usually the working circle is installed on an electric machine. Almost all types of hard surfaces can be sanded.

Cost - 980 rub.

BISON Master 33376-125

Advantages:

• convexity of working segments 5 mm;
• can be sanded up to 700 m2 of surface;
• the diamond element is located in 2 rows;
• there are holes that naturally cool the disk;
• enough to perform a wide range of work.

Flaws:

• not found.

Turbo, PROFESSIONAL series Zubr 33371-115

You can remove and grind all types of hard surfaces (granite, concrete, different types of stones). The base is made of steel that has undergone special treatment. The surface is divided into segments. The system does not provide water cooling. The working part is stuffed with high-strength diamonds. This technology ensures high productivity and excellent grinding quality.

Cost - 1570 rubles.

Turbo, PROFESSIONAL series Zubr 33371-115

Advantages:

• convexity of segments 6 mm;
• can be sanded up to 800 m2 of surface;
• hard diamonds provide mirror finish;
• the disc is perfectly balanced, which ensures ease of use;
• The cup is equipped with holes that perform a cooling function.

Flaws:

• not found.

Practice "Master" 779-615

Works in tandem with diamond grinders and electric tools of an angular design. You can remove almost all types of hard materials, including paint. However, it is better to read the instructions in the instructions for exact information. Operating speed - 12200 rpm. Innovative design ensures long service life. There is a turbo layer on the cup that will help the user to create a flat surface.

Discs can be considered technologically advanced. They will make the sanding process much easier. Nozzles are produced in different versions. This provides great benefits. The discs can be used in conjunction with a wide variety of tools. The final result will be of high quality.

Cost - 850 rub.

Practice "Master" 779-615

Advantages:

• long service life;
• turbocharged layer;
• quality of processing.

Flaws:

• not found.

Expensive and high quality

Niborit-Beaver Ø125×22.2

Manufacturers presented another copy for rough surface treatment. It can be used to clean the surfaces of coatings such as bitumen, mastics, polyurethane compounds and paints. The cup will make the walls and ceilings of the room smooth in a short time. The working part is covered with special needles, which are securely held in a metal base.

The weight of the product is only 180 g, which will make the work easier for any user. It will be much easier to sand the surface in hard-to-reach places (corners, ceiling). The disc cleans the surface very quickly. This creates a large amount of dust and dirt. A vacuum cleaner will be required during the work.

Cost - 2680 rubles.

Niborit-Beaver Ø125×22.2

Advantages:

• quick cleaning of old surfaces;
• high-quality alignment;
• Suitable for floor repair work.

Flaws:

• a lot of dust.

Strong 98X20 gray

Used in conjunction with different types of machines, it has 6 diamond segments. This makes it possible to qualitatively polish mosaic floors and concrete coverings. The product is suitable for preparing a surface for coating with polymer materials.

High quality guarantees sufficient wear resistance and high grinding speed. There are small gaps between the working surface segments. During operation, they do not become clogged with dirt and dust. The cylindrical base is resistant to mechanical stress. Water supply is required during operation. This system ensures a long service life.

The effectiveness of the development is beyond doubt. The disc will easily remove large drops and swells. The diamond elements are made in the shape of small squares. The working segments are thick and have an optimal distance. This makes it possible to cope with any protrusions, differences and bulges. The “Square” type attachment will save a lot of time on roughing. Concrete and brick coatings will be polished in the shortest possible time. In this case, the wear of the diamond elements of the disc will be minimal.

Cost - 2150 rubles.

Strong 98X20 gray

Advantages:

• will save a lot of time on rough processing;
• polishes quickly and efficiently;
• long service life.

Flaws:

• requires water supply.

Features of grinding work

Diamond, as the hardest substance, effectively copes with the most difficult jobs of cleaning and grinding concrete screeds. To perform surface treatment, a diamond alloy cup is attached to the spindle of an angle grinder (grinder). The rotational motion that is transmitted to the disk is approximately 11,000 revolutions per minute. The high power of the tool on which the diamond concrete grinding cup is mounted also increases the productivity of the disc itself.

When working with hard surfaces, consider the following guidelines:

• The correct choice of nozzle in accordance with its purpose will greatly facilitate the processing of concrete.
• Before finishing grinding, rough grinding of edges and sagging is carried out to reduce the load on the disc.
• To break in the cup, it is necessary to carefully break it in in a gentle mode during the first few meters.
• The grinder should be held firmly with both hands to prevent impacts, especially when removing rough protruding defects.
• During operation, the cutter is pressed against the surface, but without increased pressure.
• Do not grind surfaces with breaks or cracks.
• To self-clean the nozzle, effectively cool it and reduce dust formation, it is recommended to supply water to the screed being treated.
• It is strictly not recommended to carry out work during frequent power outages or using faulty tools.

To avoid injury during work, you should use closed shoes made of thick, durable material. Compliance with these simple recommendations will ensure safety during work and extend the life of the diamond cup for construction concrete for an angle grinder.

Safety precautions when working with an angle grinder

To avoid damaging the instrument and harming yourself, you must follow these rules:

• Make sure the angle grinder is in full working order before you begin.
• There must be enough light at the work site.

• The user should wear thick clothing. Sleeves should not interfere with working with the device, and the clothing itself should not be in contact with the floor.
• Care should be taken to protect the respiratory tract, eyes and hands with gloves, a pair of goggles and a respirator.
• You need to let the device rest at least once every 15 minutes to prevent it from overheating.

Educational program: 2 types of jackhammer: features of pneumatic and electric chippers

As you can see, an angle grinder is very useful for concrete. You just need to choose a suitable grinding wheel for it and act carefully.

Why are disks needed?

The attachments are used for roughing work and finishing grinding. The first process refers to surface leveling and removal of defects. The base becomes rough, which increases the level of adhesion.

Finish grinding means removing the weak top layer (milk) from the concrete base. The surface becomes not only attractive, but also more durable.

Types of nozzles

Due to the fact that grinding wheels solve problems of varying complexity, they are classified according to:

• Type of binding material.
• Size, number of diamonds.
• The appearance of the cutter and its location.

The main parameter is the shape of the segment and its location on the inside of the disk. The scope of application of the tool depends on this design feature.

Single-row and double-row disc

These nozzles differ from all others in their high level of performance. The cutters are located inside the bowl in 1 or 2 rows. Using the tool, they perform rough work on concrete, sandstone, and natural stone.

Due to the large diamond chips, it is possible to quickly remove all defects. Perfect for grinding screeds, cleaning the surface, leveling joints on concrete.

Disc with boomerang cutter

This disc gets its name from the shape of the segments. With its help they perform finishing work. This is due to the fact that less coarse diamond chips are applied to the circle.

Used for manual equipment. Using a circle, they form a perfectly even and smooth edge, remove irregularities, and clean the surface. This attachment is lighter than other cups. Because of this, it is easy to work with manual equipment.

Diamond cup typhoon

The appearance of the cutter resembles a corrugated surface. Characterized by high performance. Used for work on dense concrete, reinforced concrete, granite, and other hard materials. During operation, it is allowed to perform work both with and without water.

Features of choice

The quality and efficiency of work depends on the correct choice of diamond grinding cup. In order not to make a mistake in choosing a material, you need to consider the following points:

• For what purposes is a tool needed? A typhoon cup is suitable for roughing, and a double-row nozzle will eliminate defects and unevenness of the base.
• Circle size.
• Location of landing nests.
• The size of the mounting socket must correspond to the diameter of the shaft on the equipment.
• The rotation speed of the cup must match the maximum speed of the grinding equipment.
• The nozzle must be equipped with an adapter ring. It makes it possible to operate the tool on various equipment.

All of the above points are very important when choosing a tool, since productivity and the number of work cycles depend on them.

Recommendations for working with diamond cups

The effectiveness of the working tool and its service life depend on certain features during operation:

1. Before using a new blade, cut concrete with this attachment.
2. During work, the cup should not touch the sharp edge of the material being processed.
3. Run in the disc. Operate the circle gently for the first 10 m.
4. To avoid shock loads on the wheel, hold the equipment firmly in your hands.
5. Do not apply excessive pressure to the cutter.

How and with what to sand putty on walls?

The quality of finishing work directly depends on the preparation of the wall surface. This process can be roughly divided into three working stages:

If rough leveling is enough for laying tiles, and putty and primer are enough for wallpapering, then for high-quality painting the surface of the walls must be perfectly prepared.

It is possible to achieve an absolutely flat plane and remove the most minor defects only by grinding. Lumps, scratches, roughness and unevenness are formed on the putty as a result of movements of the sharp edges of the spatula and at the junction of adjacent treated areas.

Attachments and discs for concrete for grinders

Each tool used in conjunction with an angle grinder (angle grinder) is designed to perform the operations for which it is designed. The correct choice contributes to efficient and safe work with discs and attachments.

Cutting discs

Diamond cutting wheels are used to work with concrete. These are discs made of durable hardened steel with diamond coating on the cutting part.

These nozzles differ in the following design features:

1. Cutting edge. It can be solid or with various slots. Segmentation increases the efficiency of air cooling during operation.
2. The grain size of the diamond coating and the spraying method. The most reliable methods using laser welding and thermal bonding. Silver soldering allows operation with water cooling only. The electroplated diamond edge cuts only soft natural stones.
3. The outer diameter of the circle. The correct size disks must be installed. Working without a protective cover is not only dangerous: the increased size of the nozzle leads to premature wear of the gearbox.

Diamond cutting can only cut material in a straight line. Curved sawing increases the load on the cutting edge, causing the diamonds to break.

Grinding discs for concrete

Concrete is ground to eliminate coating defects. Diamond wheels are used, which have a high abrasive ability and a long working life. Sometimes hard-alloy coated disks, the characteristics of which are lower, are called diamond. The efficiency of work is determined largely by the grain size of the working surface.

Depending on the concentration of diamonds, discs for grinding concrete are distinguished:

• with grain size 40-80 (for pre-treatment);
• with indicators 100-120 (for leveling the surface);
• with grit 180-240 (for polishing).

The tool is a steel circle with soldered segments. Diamond powder is fixed to them with a special bond. It keeps the diamonds from being destroyed by the centrifugal force that occurs during rotation.

The designations on the discs consist of 2 or 3 numbers. The first number indicates the outer diameter, the second indicates the size of the mounting hole. The third number is not always present; it indicates thickness. For a grinding tool, this parameter does not play a big role.

Cleaning and roughening attachments

These attachments look like cups or circles. There are cutters and diamond discs. Twisted metal brushes are located around the circumference of the rollers. They strip metal and stone. The diameter of the wire varies depending on the purpose (scraping or stripping).

Purpose of an angle grinder

The peculiarity of the machine is its ability to process not only smooth surfaces, but also chamfers. This is achieved thanks to the angular placement of the working disk.

The device is universal and can be used to perform many jobs:

1. The main operation for which an angle grinder is intended is grinding. Wide grinding wheels are used. Processing the ends with an eccentric grinder is difficult, but it is accessible for an angle grinder. The surface is ground with or without water cooling.
2. Polishing with a grinder is also possible. To do this, use special diamond-coated polishing discs.
3. Another operation that is performed with a grinder is res. The unit is not suitable for working with thick materials. Concrete or thick stone should be cut with special machines that have a water-cooled working wheel.
4. An angle grinder easily cleans surfaces, removing dirt, paint, mastics, adhesives, and construction mixtures using abrasive attachments.

A grinder can be used instead of a wall chaser. A cutting disc is used to cut grooves for electrical cables and pipelines.

An attachment for an angle grinder in the form of grinding cups. Features of choice

When choosing a tool, consider:

1. Type of planned work. For each operation, special attachments are most effective. Using the wrong ones slows down the work or makes the process impossible, and quality suffers.
2. The diameter of the cup, which should correspond to the power of the grinder. For accurate sanding of small areas, small attachments are more suitable. It is faster to work with large equipment, but its price is higher.
3. Mounting hole, which must correspond to the size of the shaft. If the tool spindle is thinner, an O-ring is used: the fit on the shaft cannot be loose.
4. The discs are designed for a rotation speed that the grinder cannot exceed.

The diamond grinding tool is marked with a marking that reflects:

1. external diameter;
2. cup depth;
3. working edge width;
4. segment height;
5. mounting hole size.

Numbers in millimeters indicate characteristics in the sequence given above. The spraying parameters are indicated separately: diamond content in percentage, grain size in micrometers (µm). Coarse diamond powder is suitable for roughing and rough grinding; fine diamond powder is used for polishing.

When is concrete grinding needed?

Grinding a concrete wall
After applying concrete to the floor, an unstable layer forms on its top layer after hardening. From interaction with an external aggressive environment, exposure to mechanical loads, the surface can easily be destroyed.

To obtain a monolithic and durable concrete base, this collapsing layer must be cut off. Diamond cups for grinding concrete help to do this.

In addition, the use of such a diamond disc allows you to solve other problems:

• Grinding the dried concrete screed will make the surface smooth, it will become even, without minor flaws: dimples, tubercles, ripples;
• When grinding concrete that has been in use for a long time, it is possible to remove remnants of the old floor covering and traces of rather complex contaminants from its surface;
• After the process, the water resistance of the concrete surface increases several times;
• The level of dust formation is minimized;
• The strength and resistance of the surface to moisture, harmful chemicals, and temperature changes increases;
• The cost of maintaining the concrete base is reduced;
• A grinder and a diamond cup attached to it for grinding concrete allow you to give a nondescript concrete floor an attractive appearance.

Concrete grinding becomes an indispensable technological process after pouring the floor with self-leveling mixtures, applying various impregnating compounds or thin-layer paints. Grinding is used in commercial and administrative buildings, industrial buildings, and for arranging areas in front of buildings.

Tool characteristics

Diamond blades with a diameter of 125 and 230 mm are used for various types of concrete grinding.

She may be:

• Chernovaya;
• Profiled;
• Finish.

To make cups, a metal alloy and fine diamonds are used. This composition is compressed in special forms. The use of disks for different purposes determines their parameters.

They differ:

• Types of binder;
• Crumb size;
• Location and types of cutters on the cup.

In addition, discs can be: double-row, single-row. More reliable, durable and productive - double-row. But the price of such discs is higher than that of other models.

Types of tools

The peculiarity of using metal discs for grinding concrete, and the shape of the diamond segments of the grinding cup, determines their names.

From the table you can get acquainted with the types and features of the tool:

Cup Name Feature

"Double Segment"

Used for rough, rough grinding of concrete surfaces or sandstone. Often used to eliminate an uneven layer of thick screed.

"Boomerang"

Used for final grinding of surfaces. This is achieved by using a special fraction. The great popularity of disks is explained by their low weight and functional basis. This diamond grinding cup works softly and steadily on concrete, and the surface is as smooth as possible.

"Dolphin"

The dolphin nozzle is a gentle equipment that can be used to treat the surface very delicately. These are discs with low weight, high wear resistance and performance.

"Square"

The mass of such instruments is the largest. They are used for rough processing of concrete

At the same time, its excess is chipped off the surface, which increases the speed of construction work and increases the wear resistance of the nozzle. Treatment with such attachments helps to level the concrete surface and increase its “adhesion” to other materials, which is very important for polymer coatings.

"Typhoon"

Used for peeling and grinding very hard concrete. It is characterized by high wear resistance and a long service life, while having a low dead weight.

"Turbo"

This bowl is for grinding concrete

has a number of almost continuous diamond inclusions, which ensures accurate surface grinding

The tool is used in places where good surface quality is required.

Types of attachments for grinders

I would like to note that about 10% of the market range of attachments for grinders belong to the universal category. The remaining 90% can be used exclusively in a narrow area of ​​solutions. For example, a nozzle for primary processing of steel cannot be used for stainless steel, and vice versa.

Important: support plates for an angle grinder are also a type of attachment. Such products, consisting of polymer and rubber, are often used in combination with polishing and grinding wheels.

If you calculate the frequency of use of attachments depending on the tasks, then cutting will come first. Grinding will be in the second position and the third will be the process of removing rust with paint and varnish materials from the surface of the workpiece. Next, I want to pay attention specifically to the grinding attachments of angle grinders.

Surface preparation

Before grinding you must:

• Dismantle the old coating;
• Cut off all large growths;
• Make sure there are no metal fittings exposed to the surface. If there is one, cut it off with a grinder;
• Check the evenness of the surface with a three-meter ruler;
• Carry out an examination of the plane for the size of cracks and seams. If they are available, sealing is carried out using any hand tool with epoxy resin-based mastic;
• The floor and walls are tapped for strength. Refill if necessary.

Repairing Potholes

Concrete wall repair

Repairing potholes when renovating a property is important. After long-term use, the concrete surface becomes covered with potholes and bumps; their difference exceeds the permissible size of 5 mm. This requires removing defects before grinding begins.

In this case:

• Using a diamond wheel placed on a grinder, the damaged area is cut to a depth of at least 200 mm, and the material is removed;
• The cavity is cleaned from dust with a sandblaster;
• Treated with primer;
• After drying, it is sealed with a special compound;
• Using a lath or rule, the repair mixture is leveled.

After the solution has hardened, you can directly grind the concrete with a circle.

Small cracks are usually opened in a circle to a depth of 100 mm. The algorithm for performing the work is identical to eliminating potholes, but it is not necessary to remove the damaged area.

Surface grinding

Grinding with a diamond wheel does not correct mistakes that were made in the preliminary stages. It only removes the weakest concrete layer and slightly trims the resulting surface.

The instructions for carrying out the work are as follows:

• You can turn on the tool only after checking its serviceability;
• The reliability of the bowl is checked;
• The operating time of the equipment is no more than 15 minutes, after which it should be turned off to cool to room temperature;
• It is necessary to take care of a special suit that protects you from the dust that is generated during grinding;
• Measures are taken to ensure timely replacement of cups when they are worn out with similar ones in order to maintain high quality of work.

https://youtube.com/watch?v=seUHW_QgMX8

For mechanical processing of screeds, it is better to use bowls with a diamond grit of at least 400.

Features of wall grinding

Grinding a wall with a diamond cup

When processing walls, it is necessary to take into account some nuances. Concrete walls cannot be sanded using equipment used for floor work. This is due to the high gravity that interferes with its operation.

When sanding walls, as shown in the photo:

• It is rational to use hand-held grinding machines with large-grain diamond bowls;
• It is better to start the processing process from any corner;
• It is most rational to carry out sanding in small strips, starting from the ceiling, moving towards the floor;
• From time to time it is necessary to check the evenness of the wall with a level, and move on to the next strip after obtaining an even vertical line on the previous one;
• If putty has been applied to the walls, do not use excessive zeal so as not to remove all of it. Otherwise, the work will need to start again.

Cleaning a repaired crack

Leveling the floor

The video in this article will tell you in detail about grinding concrete walls and floors.

https://youtube.com/watch?v=wHNhxkUe-d8

If a concrete sanding cup is used to finish the surface of walls or floors, the texture of the material looks better. At the same time, small differences in the concrete are smoothed out, and the surface acquires better qualities not only in appearance, but also in performance characteristics.

Grinding tool

How to sand putty on walls? For sanding walls after puttying, three types of plastering tools are used:

To better see wall defects, shine a bright light on it at an angle of 65-80°. The shadow will accurately show you the places of sagging, cracks, holes and other imperfections.

Graters with grout mesh

A grater for grinding putty is a hand tool in the form of a flat rectangular platform with a handle. On the short sides there are clamps for tensioning the mesh for grinding. It is offered for sale in three categories:

The mesh numbers are determined by the grind size of the abrasive material applied to them. The main advantage of meshes when performing grinding is the reduced amount of dust that remains inside the cells of the braided tool.

Stone and sanding sponges

A block is the simplest available device for sanding putty. It is a piece of flat wooden beam, galvanized profile or a rectangular piece of polystyrene foam, wrapped in sandpaper for sanding walls after puttying.

As a type of whetstone, we can consider special grinding sponges supplied to our country from European and Chinese manufacturers. They are a parallelepiped made of rigid porous polymer, covered on 4 sides with abrasive material. Their use makes the work more efficient, but such a tool costs more than a grater or a handy block.

Hand grinders

The most common grinding machines are small “grinders” equipped with special round attachments. The abrasive material is made in the form of circles of sandpaper with Velcro glued to the back. Using hand-held power tools allows you to process a large surface area, but the quality will be average at best.

Shape and number of segments

The number and shape of segments vary depending on the conditions and the required quality of work. They are also positioned differently, which affects the working properties of the nozzles.

Double segment

Diamond cups with double-row segments eliminate large defects in concrete. They easily cope with large sagging and protruding seams. They can reduce the thickness of the screed. The surface after processing is rough, finishing grinding is carried out with a different attachment.

Boomerang

The shape of the segments resembles the weapons of the Australian aborigines, which is why the cups got their name. These are diamonds of the finest fraction, which determines the purpose of the attachments - finishing grinding. Thanks to it, the screed acquires a mirror-like evenness. Light weight and balance make it possible to use the Boomerang with an angle grinder. The equipment is stable and soft in operation.

Square

Square incisors of increased thickness are located at a distance from each other. This allows you to remove protrusions on the concrete and level the surface. The weight of the disc is large, which helps in work. Powerful segments cut off unnecessary elements. Rough processing is used to prepare for subsequent operations. It leaves behind a rough surface with good adhesion, which requires coating with different compounds.

Turbo and Typhoon

"Typhoon" is used for peeling and grinding ultra-dense and hard materials. High wear resistance of the segments increases the service life. "Turbo" is used for high quality grinding. Nozzles of this type are used for processing chamfers, edges, bends, and engraving work.

The cutters of both attachments are located perpendicular to the rotation. The slots between them are of minimal size, making the working surface almost continuous.

Marking

The technical characteristics of the grinding wheel are motivated by the variety of grain sizes and the properties of the abrasive filling, the type of bond, and the amount of hardness. The main parameters of the grinder for concrete are:

• cutting wheel size, for example, 125x22x2, where the first number means outer
• diameter, the second - the cross-section of the seat for the spindle flange, the third - the thickness of the disk.
• grain number with degree of hardness, where respectively 800−630 μm.

K and L – the value of the softness of the product.

The element of quality remains:

• the wheel body in the relationship “porosity - bond” (type of material).
• spindle rotation speed.
• the achieved accuracy class and the cleanliness of the processed structure.

Which nozzle should I choose?

In order to process the coating efficiently, it is necessary to carry out the work slowly, taking into account the invisible aspects. When selecting a nozzle, take into account the type of concrete and the fillers contained in it. There should be no holes or bumps on the floor more than 5 mm high.

Abrasive cup nozzle

for angle grinder equipment

The cost of the work depends on the selection of material on the disc-cup, and the material is selected based on the purpose of the room.

1. A suitable option is a disk-cup with crushed stone metamorphic small fractions.
2. If impregnation is applied on top, then use marble chips or granite.

The disc must contain small fractions of strong rocks that will polish the concrete surface. They are easy to work with; a disc made of sedimentary gravel is more difficult. The quality of processing depends on the density of the filler. High density is not recommended, and low density will not make it possible to achieve quality.

Grinding concrete floor

You can start rough grinding 3-5 days after the screed has hardened. You should not start work earlier, since there is a high probability of tearing out crushed stone from a fresh coating that has not gained sufficient strength.

After selecting a suitable nozzle for the floor, you can begin to remove the first layer. To do this, you should use products with an abrasive of 25-30, and for a decorative coating - 40. When using larger grain sizes, it will be possible to give the floor greater strength and durability. To give a glossy effect, processing must be carried out with nozzles with abrasive 1500-3000.

The process itself should be performed in the following sequence:

1. The first step is to do the preparatory work. Clean the surface by first sealing the seams and eliminating other defects. It is also necessary to remove all debris from the premises, as well as objects that may interfere with the work.
2. Then you should put the casing on the grinder, make sure that the attachment is securely fixed, and also prepare and turn on the vacuum cleaner.
3. Next, you can perform rough grinding of the hardened concrete coating, removing 2.5-3 cm. If the wet method is preferred, then the floor should first be moistened generously with a hose.

Note! When using an angle grinder, you need to take a break after every 15 minutes. You can turn it on again only after the nozzle has completely cooled down.

1. Afterwards, the surface must be opened with special impregnation and solutions that increase its strength, which should be poured onto the floor and slightly leveled around the perimeter. Complete absorption of the mixture occurs within 10-15 days.
2. Only after the specified period of time has passed can the final processing begin. During this process, you should resort to using nozzles with lower abrasiveness. The optimal option is 40.

Upon completion of cleaning, you can paint the concrete floor with paint or varnish in several layers, and also give it a glossy effect during further processing with the appropriate nozzle. If there is no need for this, you can immediately begin using it after removing the debris.

Having learned how to grind a concrete floor with a grinder with your own hands, as well as following all the specified recommendations during the work, you will be able to achieve the desired result and avoid possible mistakes that can cause damage and reduce the service life of the coating.

Video:

Sanding material

There is a huge variety of them, but for treating the floor in an apartment or private house, two types of attachments are enough: diamond cups and abrasive discs. The second products are of worse quality, although they are cheaper.

Work can be carried out on any concrete, taking into account the brand, as well as the age of the coating and fillers. A layer of up to 3 cm can be removed. There may be pits and tubercles on the surface, but the differences between them should not be more than 0.5 cm.

It is necessary to select the material taking into account the purpose of the room being treated, which affects the cost of the work performed. Grinding of concrete screeds best occurs when fine-grained and metamorphic rock crushed stone is used as a filler.

Note! Grinding concrete with coarse gravel can only be done using expensive equipment and appropriate attachments.

In addition, you must first purchase impregnation. Thanks to the initial polishing, the top coating is removed, after which the concrete absorbs these compounds well. The impregnations used give the surface a glossy effect and also increase its strength, providing protection from chips, cracks and moisture.

Types of diamond blades

Diamond cutting discs have certain differences in design and manufacturing technology.

Types of diamond discs by structure

According to their structure, dry cutting discs are divided into:

• solid;
• segmented;
• turbo;
• turbo segmented.

Solid diamond discs. They are equipped with a continuous cutting belt running along the circumference, into which artificial diamonds are embedded in several rows. For cutting ceramics and other materials where cutting accuracy is the main parameter, wheels with a solid edge are preferable.

Segmented diamond blades. Segmented ones are divided by radial slots into several working sections of the same size; they are more resistant to mechanical and temperature loads and are used more often than solid ones, although they are somewhat more expensive. They are more productive than solid ones, but the cut after them is not as accurate. They are best used for rough cutting of concrete structures.

Diamond turbo discs. Turbo discs are distinguished by the presence of oblique (and other) notches on the sides of the rim. It slightly increases the mechanical strength of the wheel and significantly enhances the intensity of heat removal, which allows you to speed up cutting from 50 to 100%. Like segmented discs, turbos are suitable for fast cutting of any mineral materials with a wide range of hardness - from sandstone to concrete and granite.

Turbo segmented diamond blades. Wheels divided into segments with a side notch “turbo” are even more productive. They are characterized by high performance and versatility.

Disc differences based on diamond arrangement

Artificial diamonds are fixed in the working rim in a certain order. There are circles with an even distribution when any of the selected units of length or segment contains the same number of crystals.

But there are also circles in which diamonds are arranged with a certain period (the so-called sandwich circles). They are more productive, providing less force on the tool, more efficient cooling and even distribution of force.

Diamond blades for dry and wet cutting

According to the cutting method, diamond discs are divided into wheels for dry and wet cutting. The former provide an accurate cut and are cleaner to work with, but require the use of dust extraction devices - when cutting, very small particles of solid materials are formed that irritate the eyes and respiratory tract. Water-cooled wheels operate with a constant flow of liquid, which binds and washes away dust, but they cannot always be used. This is due to some cumbersomeness of the hydraulic system and the formation of drips.

Dry cutting wheels can be used in water-cooled machines, but wet cutting wheels cannot be used without cooling - they overheat and quickly break down.