Tile cutting with an angle grinder: how to make a cut without chipping?
When installing ceramic tiles, it is often necessary to trim it in a certain way. To solve this problem is a special equipment, which includes all the well-known angle grinder (angle grinder).
Cutting tiles with an angle grinder is the most popular way to perform this type of work. To cut a tile in a certain way, use a tile cutter. The tool is represented by two types: manual and mechanical. But its price is quite high. Buy it, mainly professional finishers for permanent use. Simple citizens have more popular such a tool as angle grinder. It is considered a multifunctional tool and helps to solve many domestic problems. It can be found practically in any house. If the owner of the room himself is engaged in the installation of tiles, it is advisable to use exactly this tool. Unlike any tile cutter, the angle grinder allows you to make even round-shaped holes, in the absence of a special drill bit (drill bit).
Discs for cutting ceramic tiles
To work with different types of material, there are also special varieties of cutting discs. The following types of cutting discs are used to cut tiles with an angle grinder without education:
- Stone discs are characterized by an affordable price, but at the same time and fast wear and tear. Because of the considerable width, the cut is also wide. For these reasons they are rarely used;
- Steel discs have a longer service life, and they are less thick. Diamond-tipped discs are the most expensive. Suitable for the toughest ceramic and other tiles. These tools are divided into several types, which are determined by the way in which the diamond chips are applied and their purpose (dry cutters, wet cutters, combined). Accordingly, their cost will be different. disc width not more than 2 mm is the best choice for this type of work (in order to have the straightest possible cut line), the thickness of disc edge should be thicker than the thickness of tile.
Discs for wet cutting
Such discs are marked with a drop
One type of disc is designed for wet cutting of porcelain tiles, otherwise. a solid disc. For work with a disc for cutting porcelain tile with an angle grinder without chipping it is an excellent choice. Suitable for cutting very large volumes of ceramic tiles. From the name, we can conclude that it is used in combination with water. This disk is suitable for electric plate cutters. With its solid edge, you can make a perfectly smooth cut. The coolant allows you to work on cutting ceramic tiles almost without volume restrictions. By the way, this type of disc for porcelain tiles, for an angle grinder can only be used when cutting small amounts of tile. This is because the disc surface loses its strength when heated and the diamond chips wear out quickly because the silver solder was used to apply them to the disc surface. It is recommended after cutting tiles for 15 seconds to work idle for 20-30 seconds. Often, to solve the problem with overheating, some people make one mistake: they put the product in a container with cold fluid, thus contributing to the appearance of small cracks both on the dusting and on the disc itself. This results in chips on the disc, which can fly off while you are cutting and cause damage to your equipment, ruin ceramic tile, and even injure yourself.
Dry Cutting Discs
Water cooling increases durability
This type of disc has a design indentation from the center to the edge. Their job is to keep the metal from expanding when heated, dividing the disc into segments. So it does not need to be cooled with fluids like a waterbased cutting wheel. But also after about one minute of cutting, you should work for 20-30 seconds at idle. This disc is called a segmented disc. If you are wondering what kind of disc to cut porcelain tile with, an angle grinder or other equipment, the segmented disc is great for this task. Recommended for cutting floor tiles and porcelain tile. Use at low speeds and medium amounts of work. The disadvantage of this type of disc is chipping on the glossy side. If the chips fall on the invisible area, then it is not terrible, in other cases, the error can be corrected with a special grout in the tone of the tile. To prevent scratches and chips, craftsmen glue masking tape on the tiles.
It is important to watch the saw blade’s position when cutting tiles, as even a slight misalignment can cause damage to the product and the blade. It must be noted that the segmented blade is considered the most risky: work gloves often get fibers into the segments, so it is safer to use gloves made of thick and smooth fabric.
How to choose a diamond disc for cutting porcelain tiles
Porcelain stoneware is one of the hardest surfacing materials. It is very difficult to cut or drill through. Porcelain tile is harder than granite. At the same time, the material is characterized by sufficiently high brittleness. This means that when you try to drill or cut it, unsightly chips and cracks can form on the surface. How to avoid problems? Special tools must be used! Specialized discs with diamond chips on the cutting edge are used for cutting porcelain stoneware. In this article the master plumber will tell you which diamond disc to choose for cutting porcelain tiles.
Porcelain tiles are very strong and aesthetically attractive finishing material. It consists of kaolin, illite clays, quartz and feldspar. From this raw material is obtained slicer. a soft faora mass, from which then produce porcelain stoneware slabs.
A distinctive feature of porcelain stoneware is its high hardness: the indicator is just slightly inferior to diamond. The material is resistant to regular and shock loads, with a minimum degree of abrasion.
Ceramic stoneware is frost resistant and moisture resistant. Due to its high density it is inert to chemical compounds. The material is perfectly resistant to dirt, suitable for internal and external finishing of buildings.
Cutting of porcelain tiles is made with the help of angle grinder or a machine. Special discs are excellent for the task at hand. If used properly, they last long enough and retain all their properties. Of course, when choosing a disc, you should be guided by their performance and the specifics of the work performed. Let’s find out what circles are suitable for high-quality cutting of porcelain tiles, how to choose them and do not make a mistake!
Diamond disc. a tool for cutting hard surfaces. It is a metal disc with a diamond-coated edge. The tool is suitable for angle grinder, tile cutter, cutting machines and other equipment.
Many people go to the store and try to buy a disc for cutting tile or porcelain tile, thinking that these are two different circles. In fact, the disc is selected not so much on the basis of the type of cutting material, but also taking into account the volume of cutting and the tool itself, which will be used for cutting. All available samples can be roughly divided into three main types, then we will consider each of them in detail.
Wet-cutting wheels are among the most popular. The disc surface is solid and not etched at all. This is the second name for the tooling. solid diamond discs. This tool is suitable for cutting not only porcelain tiles, but also standard tile.
Wet cutting with such tools is performed with coolant. Can be used with plain water, but also with heating-water, e.g.
Diamond products for wet cutting are used together with electric tile cutters. The solid cutting edge allows a perfectly smooth cut with almost no imperfections.
Manufacturers offer products of small thickness up to 1,6 mm for high precision work. They are designed to be mounted on machines capable of smooth operation, no jerking, no runout. The width of the diamond layer depends on the diameter of the wheel and ranges from 6-20 mm.
Diamond chips are spread on the cutting surface of the disc with a silver solder that loses its strength when heated and the sputtering quickly wears out.
The operating time of a diamond wheel with liquid cooling is almost infinite, which is ideal for large quantities of tile. If the disc is used for angle grinder, the cutting time should not exceed 15 seconds, after which you need to make several idle rotations to cool down.
Many people often make the mistake of immediately dipping a solid disc into a tub of water to cool down after cutting tiles with an angle grinder. Rapid cooling leads to the appearance of microcracks on the sputtering and the product itself. This results in chips on the disc body which often fly off during cutting and can damage equipment, tiles and cause personal injury.
How to choose a diamond disc for cutting porcelain tiles
Porcelain stoneware is one of the hardest finishing materials. It is very difficult to cut or drill it. Porcelain stoneware is harder than granite. At the same time, the material is characterized by a rather high degree of fragility. This means that when you try to drill or cut it, unsightly chips and cracks can form on the surface. How to avoid problems? It is necessary to use a special tool! Specialized disks with diamond chips are used for cutting porcelain stoneware. In this article, the master plumber will tell you which diamond disc to choose for cutting porcelain stoneware.
Porcelain stoneware is a strong and aesthetically attractive finishing material. It consists of kaolin, illite clays, quartz and feldspar. This raw material is used for the production of slip, a soft faience mass, from which porcelain stoneware slabs are then produced.
A distinctive feature of porcelain stoneware is its high hardness: the index is slightly inferior to diamond. Material is resistant to regular and shock loads, with a minimum degree of abrasion.
Porcelain tiles are characterized by resistance to frost and moisture. Thanks to their high density, they are inert to chemical compounds. Excellent resistance to dirt, suitable for interior and exterior use.
Cutting of porcelain tiles is performed with the help of angle grinder or a machine tool. Special discs perfectly cope with the tasks. When used properly, they last long enough and retain all their properties. Of course, when choosing a disc, one should be guided by its performance and peculiarities of the work performed. Let’s understand what circles are suitable for high-quality cutting porcelain tiles, how to choose them correctly and do not make a mistake!
Diamond disc. a tool for cutting hard surfaces. It is a disc of metal with a diamond-coated edge. The tool is suitable for angle grinder, tile cutter, cut-off machines and other equipment.
Many people go to the store and try to buy a disc for cutting tile or porcelain tile, thinking that they are two different circles. In fact, the disc is not so much selected on the basis of the type of cutting material, but also by taking into account the volume of the cutting and the instrument that will be used for cutting. All available samples can be divided into three main types, then we will consider each of them in detail.
Wet cutting discs are one of the most popular. the disc surface is solid and not hollow. This leads to the second name of the tooling. solid diamond discs. Such tool is suitable for cutting not only porcelain tiles, but also standard tile.
Wet cutting with this type of equipment is performed using coolant. It is possible to use both normal water and ash, for example.
Diamond products for wet cutting are used in conjunction with electric tile cutters. The solid cutting edge allows perfectly smooth cuts with almost no imperfections.
For high-precision work, manufacturers offer products of small thicknesses. up to 1.6 mm. They are designed to be mounted on machines capable of smooth, jerk-free, run-out-free operation. Width of diamond-bearing layer depends on wheel diameter and ranges from 6-20 mm.
Diamond grit is applied to the cutting surface of the disc with silver solder, which loses its strength when heated and the sputtering wears out quickly.
The operating time of a diamond wheel with liquid cooling is almost infinite, which is ideal for large quantities of tile. If the disc is used for an angle grinder, the cutting time should not exceed 15 seconds, after which several idle rotations are made to cool down.
Many people often make the mistake when immediately after cutting tiles with an angle grinder, they drop the solid disc into a tub with water to cool it. Rapid cooling leads to the appearance of micro-cracks on the sputtering and the product itself. The result of such actions are chips on the body of the disk, which often fly off during cutting and can damage the equipment, tile and injure people.
Types of discs for cutting porcelain tiles and ceramic tiles
Many people go to the store and try to buy a wheel for cutting tile or porcelain tile, thinking that they are two different wheels. In fact, the disc is selected not only on the basis of the type of cutting material, but also given the amount of cutting and the tool itself, which will be used for cutting. All available samples can be divided into three basic types, below we will consider each of them in detail.
Discs for wet cutting
The picture shows a diamond disc for wet cutting on porcelain tiles, which is also called a solid disc. The same blades can also be used for cutting tiles in small quantities. The product is designed for wet cutting, i.e. in the presence of coolant. It is used for electric tile cutters and thanks to the solid cutting edge it can make a perfectly even cut with almost no splinters.
With water cooling, the cutting time is virtually unlimited, which is ideal for cutting large tiles in porcelain tiles or floor tiles and for large quantities.
For your information. These wheels can also be used with an angle grinder, but only for small cuts and only on tile. In this case, the duration of the disk should not exceed 10-15 seconds, after which he needs to work at idle speed for 20-30 seconds to cool down.
Diamond chips are applied to the cutting surface of the disc with a silver solder, which loses its strength when heated and the coating quickly wears out.
Important. Many people often make the mistake when immediately after cutting tiles with an angle grinder, they lower a solid disc into a tub with water to cool it. Rapid cooling leads to microcracks on the sputtering and the product itself. Such actions result in chips on the body of the wheel, which often fly off during cutting and can damage equipment, tiles, and injure people.
Learn more about how to cut porcelain stoneware with an angle grinder.
Dry cutting discs or dry cutters
A wheel for dry cutting porcelain tile or ceramic tile is called a segmented wheel or dry cutter. The product does not need to be cooled with water, as it is designed with notches from the edge to the center. These cutouts divide the edge of the wheel into segments, cool the workpiece during operation, and compensate for metal expansion when heated.
Designed for work at low speed, it is ideal for angle grinder or circular saw. The dry cutter should be used for cutting porcelain tile or thick floor tile. Suitable for small to medium sized jobs, but leaves chipping on glossy or glazed tile surfaces.
The picture below clearly shows the result. The uppermost tile is the result of a dry segmented disc, the lower tiles were cut with a solid disc with coolant. Such chips are acceptable if the joints will be hidden, but in a visible area of the floor, this quality of cut is not acceptable and can only be hidden by solid color grout.
Please note. Just like a wet saw blade, the dry cutter also needs to be cooled. Time of cutting is about 1 minute, after that the circle cools down in idle for 20-30 seconds and again you can start cutting.
Important! Dry cutters are the cause of injuries if they are not used safely. The segments of the disc can catch the thread of knitted gloves, so the use of thick cloth gloves is recommended. Be sure to watch the position of the disc when cutting; a slight misalignment will cause damage to the disc and work surface.
Combination
Combination wheels are a combination of a solid disc and a dry cutter. This versatile product is an ideal choice for domestic use, as it can be operated in both dry and coolant mode. The advantages of versatility are also a disadvantage. The disc does not cut as cleanly as its solid counterpart and may not run as long without cooling as a typical dry cutter.
Tip! For occasional use in an apartment or private home, when laying tiles or porcelain tiles in small rooms with a minimum number of cuts, we recommend choosing the combination disc.
Important! Combination models suffer more than others from the clogging effect, when small particles of tile get jammed in the grooves and get stuck in the diamond coating. On other types of discs, this problem can be solved by turning the disc and changing the direction of rotation on the axis. Reverse rotation cleans the dusting and restores cutting ability. Combination models usually have a given direction of rotation and you can not turn it to the other side, it just will not cut. In such a case, use normal sand-lime bricks or concrete, make a few cuts and the dusting will be cleared.
What does the price of a wheel depend on?
Among domestic manufacturers it is worth noting such as:
Obviously, foreign manufacturers will cost more than domestic ones because of the markup for brand and shipping costs. According to the results of independent testing by famous manufacturers on the market ZUBR showed the results that significantly exceed those of foreign models.
The price of the disk is also influenced by the technology of spraying diamond abrasive on the cutting edge. The most common technologies are:
- Brazing. We mentioned these products above, where the abrasive shavings are soldered to the edge with silver solder. The technology is cheap and allows you to lower the cost of models, but when heated, the solder loses its quality and the diamond coating quickly wears out. Consequently, the service life of the circle is small, but quite suitable for domestic use.
- Geometric closure. In this method, electricity is used for maximum heating of the edge and the diamond sand is firmly soldered to the surface of the circle. The service life of such products is much higher than the previous ones, the price is still within the range of affordability. This method is usually used for combined grinding wheels that are suitable for dry and wet cutting.
- Laser soldering. This is a very expensive technology and is used for industrial models. With such a wheel you can cut everything from white brick to granite.
Important! Today’s market is full of blatant imitations of well-known brands, so when buying a dry cutting wheel for ceramic tile or porcelain tile, pay attention to the price. A wheel from Bosch or HILTI, for example, can’t possibly cost 900 to 1200. Buy only from specialist retailers or branded outlets.
In brief about types of tiles
Use mosaic, glazed or porcelain tile for wall and floor cladding. In the case of the first, as a rule, it is enough to have a construction knife or scissors at hand to cut the grid formed at the factory. For cutting larger samples you need a power tool or a handheld tile cutter. Consider what you need to know about the facing material before sawing tiles with an angle grinder.
Ceramic products are characterized by high hardness and durability. These can be samples in a solid or double layer (with a decorative coating). The main disadvantage of materials. brittleness. From the point mechanical load, the blade can break, and the edges during the cutting splintering. These points are important to consider when choosing a tool.
Choice of accessories for cutting tiles
To understand how to cut tiles with an angle grinder without chipping, you need to figure out the criteria for selecting the tool. Since the cladding is fragile, it will be correct to perform the work with a small device with a capacity of up to 1 kW. The ability to adjust the speed will also be relevant here. Reduced speed may be necessary to avoid the risk of chipping and cracking. As a rule, the work takes place at 3-3,5 thous. rpm.
Regarding the choice of interchangeable tooling, it is recommended to choose the 125 mm wheel. A small-diameter blade allows you to work with more accuracy. But you should consider that productivity and service life are higher with a 150mm or more tooling. That is, for a large-scale project, it is better to consider larger cutting-off wheels. But the decision must be made taking into account the simultaneous increase in weight of the power tool.
Consider what kind of disc for an angle grinder to cut ceramic tile or porcelain tile. craftsmen usually opt for a diamond-powdered steel model.
The thickness of the edge in this case is over 2 mm. Thinner discs are installed in machine tools, and in the case of manual tools, there is a high probability of damage to the tooling or facing blade. The reason. jerks and impacts.
The following variants of diamond discs can be used to cut the material:
- Segmented. The cutting edge here is divided into several sections by small cuts. The edges are sprayed with synthetic diamond. Such a disc device allows the blade to cool, which prolongs the working time (run in) up to 1.5 minutes. The break should be done at idle for 20-30 seconds. Use it for dry cutting.
- Solid. Circle made of solid material, with a diamond grit edge. The cutting line is best handled with this disc, so the cut is accurate. Water is required for cooling action. you can moisten the tile.
- Combination. This is a universal ceramic tile cutting disc for angle grinder. Inferior to segmented in terms of working time, solid in terms of accuracy.
Masters recommend to consider the cutting discs, taking into account the height of the facing material. Working life will be higher if the thickness of the tile is less than the width of the sprayed edge. This way the diamond grit lasts longer.
Density and fraction of synthetic coating must be considered in addition to the above mentioned. Especially if you plan to cut porcelain tile or thick tile., A lot of work needs to be done. In this case, you need to choose wet-cutting discs with relatively coarse diamond grit.
Safety precautions
Any cutting wheel must be replaced if it is damaged. It is easy to spot them. there are sparks from steel and ceramic contact. This phenomenon can lead either to chips and cracks in the tile or to disc breakage during work. The latter is dangerous for the operator. Some craftsmen try to rectify the situation by grinding out the defect and continue working. But such a tooling is already considered faulty.
Before sawing tiles with an angle grinder without chipping with a diamond disc, you need to protect yourself from large amounts of dust during dry cutting. Not only do you need gloves and a respirator. It is also necessary to use goggles and a protective cover for the tool. Some craftsmen remove the latter for better visibility, which increases the risk of injury from unanticipated sparking. Here the solution is a contrast marker or drawing a clear scratched marking (you can use a rod glass cutter).
Diamond discs overview: top 5 manufacturers
Bosch 2608603241
The first place was taken by the disk of the German manufacturer. Model is sold in packages of 10 pieces.
| Seating diameter: | 2.2. cm |
| Area of application: | Highly reinforced concrete, reinforced concrete, concrete |
| External diameter: | 15 cm |
| Type of cutting: | Dry |
| Type of layer: | Turbine |
| The thickness of the diamond layer, mm: | 3 |
| Diamond layer height, mm: | 1 cm |
| Recommended shaft speed, rpm: | 10200 |
| Application tool: | angle grinder |
High cutting speed, precise cutting lines, accelerated heat dissipation and exhaust of slag and dust. dry cutting discs for concrete. Since the coating has a triple diamond layer, when the first diamond is worn out, it is replaced by the second one, and the second one is replaced by the third one.
This is the best model among speed-cutting discs for hard materials.
DISTAR Turbo
| Seating diameter: | 22.23 mm |
| Scope: | Highly reinforced concrete, Reinforced concrete, Concrete |
| Outer diameter: | 230 mm |
| Cutting type: | Dry |
| Type of layer: | Turbocharged |
| Diamond layer thickness, mm: | 2,6 |
| Diamond layer height, mm: | 12,0 |
| Recommended shaft speed, rpm: | 6500 / 5000 |
| Application tool: | angle grinder “angle grinder” |
Used for cutting reinforced concrete and concrete in combination with rebar. The structure of the disc (turbined diamond layer) clears the surface of slag and dust during cutting, increases the speed of work, lowers the temperature of the cutting edge, prevents its depletion.
Scope of application: professional. The third generation of EXTRA diamond discs with an increased diamond layer (up to 12 mm).
DISTAR 1A1RSS/C3
| Seating diameter: | 22.23 mm |
| Applications: | Paving tiles, Sandstone, Brick, Concrete, Reinforced concrete, Granite, Concrete |
| Outer diameter: | 230 mm |
| Cutting type: | Without water |
| Layer type: | Segmental |
| Diamond layer thickness, mm: | 2,6 |
| Diamond layer height, mm: | 12,0 |
| Recommended shaft speed, rpm: | 6500 / 5000 |
| Application tool: | angle grinder “angle grinder” |
Diamond disc for cutting concrete is used for working with materials of any strength: from paving tiles and bricks to reinforced concrete blocks. The disc has an aggressive body with shaped plungers that eject slag when working at high speed.
Turbo Baumesser Stahlbeton PRO
| Seated diameter: | 22.23 mm |
| Field of application: | Paving slabs, Foamed concrete, Bricks, Refractory bricks, Reinforced concrete, Concrete |
| Outer diameter: | 230 mm |
| Cutting type: | Dry |
| Layer Type: | Turbine |
| Diamond layer thickness, mm: | 2,6 |
| Diamond layer height, mm: | 9,0 |
| Recommended shaft speed, rpm: | 6500 / 5000 |
| Application tool: | angle grinder |
High-speed cutting with Baumesser Stahlbeton PRO Turbo discs allows you to work with medium-hard and dense materials, while the degree of concrete reinforcement should not exceed 12 mm.
GRAFF GDD 18 350.10
| Seating diameter: | 2.54 cm |
| Field of application: | Paving slabs, Foamed Concrete, Brick, Concrete |
| Outside diameter: | 350 mm |
| Type of cutting: | With water |
| Diamond layer thickness, mm | 3.4 mm |
| Recommended shaft speed, rpm: | Up to 5400 |
| The tool of choice: | angle grinder “angle grinder / stationary |
The honorable fourth place is taken by concrete cutting discs from Belarus. This is a cheaper counterpart to the winners of the rating, although it is not inferior in quality and cutting speed. Manages curbs, paving slabs and bricks.
Safety regulations
The result of the review showed that diamond discs are the best discs for cutting concrete, both on a stationary machine and on a manual angle grinder. The ability to choose the right disc for the job, the speed and the precision of the cut are the main arguments in favor of diamond discs.
Tile cutting discs
Cutting ceramic or granite tiles is performed with stone discs or steel discs with diamond cutting edges (Suhoresis). As practice showed, the best performance when cutting edges of porcelain stoneware or ceramic was found with diamond discs. Further, about each of discs in more detail.
Simple stone discs
They are the cheapest discs available for stone, have a shorter life span and are likely to be replaced more often. In addition they are thicker than their diamond competitors, and accordingly the line for trimmer cutting with these discs is thicker, and there is more dust buildup at work. In such circles there is a high risk of chipping on the cutting edge, and it seems that the disc remains intact, but according to safety regulations it is necessary to replace it, because further destruction of the edge can cause injury to the worker.
Diamond-tipped discs
Dry cutters are able to carry high loads without overheating and destroying. The only condition is that direct contact with the cutting surface must not exceed 90 seconds, then the disc must cool down in idle mode, after which you can get back to work. When buying a cutting tool, craftsmen often give preference to a continuous diamond coating.
If during the cutting you notice a glowing band along the entire edge of the circle, then immediately stop the process, otherwise the tile will be overheated and spoiled. But do not be upset, the disc is still working, but overheated. Just make a couple of cuts on any abrasive surface (rubble stone, granite, sandstone) and the wheel will be good as new again. Dry shears come in two varieties: segmented, solid.
- Segmented diamond discs. This type is represented as a steel disc divided into segments. In fact, the disc has an intermittent cutting edge. Both ceramic and natural stone can be cut with this disc. Even though they have a better cooling capacity, these discs tend to chip more often, so they are not as good for filigree work.
- One-piece diamond wheels. These wheels can do more than just cut tiles and stone, they can also be used to plan the side edges, giving it the right angle and shape. Thanks to its minimal detonation, the wheel allows you to cut glazed tiles with almost no chips.
Chip free tile cutting
To keep chipping to a minimum, try to follow the following rules when working with the tool:
- Linear cut. Mark the face of the tile with a construction marker. Make sure that the disc is positioned correctly in the direction of rotation indicated on the grinder and on the wheel. Put the angle grinder into operation and let it gather working speed. Secure the tile through the pad of rubber with clamps on a flat surface so that in the process of cutting it prevents a sudden change of position. According to the line of marking without effort to make a uniform cut to a depth of 2-4 mm, based on the thickness of the glaze and the body of the tile. Make the glaze pass very slowly and as responsibly as possible, after this step you can apply slight pressure and bring the process to completion. And also there is a variant not to cut the body of a tile up to the end, and to break off the cut edge and finish the edge with an abrasive.
- Cut a round hole with a larger diameter. To draw a marker on a point which will be the center of a circle. Then use a drill bit with a pobedite tip to drill a hole 3-4 mm in diameter through the marking area. Now it is necessary to mark a circle of the desired diameter on both sides of the tile. Then, using an angle grinder to make a short 2-3 mm notches on the contour of the marked circle, only after that you can cut the circle from the inside through cuts, and remove the remains with pliers. For complete removal of chips the edges of the hole should be processed with a file and emery paper.
- Rectangular hole. Make a line marking of the hole with a marker and a template, then drill through holes with a diameter of 7 mm in the corners, not protruding beyond the marked outline. After that, use an angle grinder to connect the holes with even cuts. Now you can remove the cut ceramic fragment, and the edges can be processed until the chips disappear.
If you want it is possible to cut a hole of any diameter and shape in the body of the tile, especially in the modern construction world there are all kinds of nozzles and accessories for angle grinders. The only thing that can never be forgotten is the observance of the necessary safety measures when working with an angle grinder!