How To Cut Concrete Angle Grinder
Determine the type of cutting: wet or dry
Concrete is usually cut with water (wet cutting), sufficient water can significantly reduce dust, preserve and increase the life of the diamond blade, and improve cutting efficiency (with wet cutting, the process can be continuous). However, when there is no water source near the work area, work is done using dry cutting. As mentioned above, when dry cutting, the process should be intermittent and superficial. If deep cuts are required, you must make several shallow cuts.
Select the required diamond blades
There are two types of attachment of the segments to the disc blade. Blades with brazed segments using silver solder are widely used in wet cutting of concrete. Laser welding of diamond segments is more commonly used for dry cutting and is characterized by high productivity.
You should check that the diameter of the diamond blade and the hole for its attachment match the specifications of your saw. Also, you should know the power of the diamond saw you are using. The saw power affects the choice of the tool. Diamond blades used on powerful saws must have a stronger bond of segments or have a high concentration of diamonds, otherwise the blade (s) can wear out very quickly.
Now that you have determined the diameter of the diamond blade, the size of the hole for the blade, the power of your saw, the concrete structure information. You can easily choose the diamond blade you need.
How to cut concrete correctly?
Concrete is usually cut with diamond blades. There are various solutions for performing concrete cutting under certain circumstances.
Use personal protective equipment
You should at least wear a professional respirator, not only for dry but also for wet cutting, because fine dust particles generated during concrete cutting can penetrate deep into the lungs and lead to serious health consequences such as cancer lungs or silicosis. If the volume of work is large, it is additionally necessary to use other means: gloves, glasses, earmuffs and special protective clothing.
Determine the type of concrete structure
There are many types of concrete and different types of diamond discs are used for each type. Some concrete structures have steel reinforcement bars (reinforced concrete). If the cutting depth is about 100 mm, or deeper, you may encounter steel grates (reinforcing cage) on your way. There are special diamond blades for cutting reinforced concrete. The curing time of concrete structures varies in different ways. Fresh concrete is more abrasive and older concrete is harder. Accordingly, diamond blades for cutting fresh concrete and old concrete must be different.
If you have the time and opportunity, you can continue to study the properties of your concrete, this information will help you choose the most suitable diamond cutting blades. For example, hard concrete filled with basalt and quartz dulls diamonds faster, so the bond for the segments must be soft so that new diamonds in the segment are opened faster. The size of the concrete aggregate also affects the speed of the tool: the larger the aggregate size, the slower the cutting speed. Please note that the type of sand has an influence on the abrasiveness of the concrete. River sand is harder than crushed rock sand.
Shallow concrete cutting
In this case, you can use an angle grinder (angle grinder or, in common people, an angle grinder) and a 105-125mm sintered diamond disc, such as a segmented diamond disc, a turbo diamond disc or a turbo diamond disc with a wave silent body, mounted on Angle Grinder. Segmented diamond blades can cause more cutting problems due to their segmented edges, but are significantly less expensive than other types of blades. Wave casing turbo diamond blades can be used for heavy duty tasks such as cutting concrete and reinforced concrete, but their price is the highest.
You can first cut the concrete to a depth of 1 cm and see how the angle grinder and diamond blade behave. If the angle grinder is easy to use and the blade cuts and does not stand still, you can continue cutting concrete and rebar to reach the depth of cut you need. Each next cut should not be deeper than 1.5 cm.
To reduce dust formation, you can have someone spray water on the diamond blade and cut during the cutting process. It is also needed to cool the diamond blade and increase the life of the blade. If water is not safe for the power source of your angle grinder, you should dry-cut the concrete. Dry cutting of concrete uses air as a heat carrier (cooling), so after a certain period of time you must remove the diamond blade from the cutting area and allow it to rotate freely to cool the segments. The period can be from several minutes to several seconds, depending on the hardness of the concrete being cut (the harder the concrete, the shorter the cutting period should be).
Throughout the cutting process, you must use a professional dust mask, otherwise you could seriously harm your health.
In addition to the angle grinder, you can use professional diamond saw blades. With a circular diamond saw blade, you can also use a larger diameter diamond blade to improve cutting efficiency.
Like all other tools, the angle grinder is divided into classes, into professional and household tools, as well as by their design features.
This is perhaps the most widely used tool besides the drill. Many people work with an angle grinder, but not everyone is wondering about the correctness of the manipulations performed, in terms of personal safety and quality of work. In this article, we want to devote you to the basic subtleties of working with this tool and consider in detail the following questions:
Let’s go in order.
HOW TO CORRECTLY CUT AN Angle Grinder?
Before you get started, you need to prepare your angle grinder. We mean the choice of rig (disc). The following points should be considered here:
- Disc diameter. Remember, the smaller the disc diameter, the more revolutions (higher rotational speed) it can withstand, and vice versa.
- The choice of the disc depends primarily on the material with which you plan to work and the design features of your tool.
- Pay close attention to the legend and markings on the disc. Having carefully studied them, you will understand whether the selected equipment is suitable for the proposed work.
Also, always follow safety precautions and wear special equipment such as gloves, goggles, long-sleeved robes and closed shoes.
First of all, clear the workplace of unnecessary items. Securely fix the workpiece to be processed, having previously marked it on it, if necessary. Getting started.
Always hold the tool firmly and confidently with both hands. Take a steady body position. You need to stand so that sparks do not fly onto clothes and, even more so, into the face during work.
Always remember about such a thing as kickback. This is the most dangerous thing that can happen when working with a grinder. It can occur if the disc is strongly jammed in the workpiece. In such a situation, the angle grinder will kick back sharply. Monitor the process to avoid this.
Also remember that the power cord of the angle grinder must be insulated from sparks during operation. If you need to move the instrument to a different work surface, be sure to turn it off first and then unplug the power cord. The same should be done in the event of a power outage. As soon as the power goes out, turn off the instrument and then unplug it from the mains. If this is not done, then when power is restored, the angle grinder will start to work in a chaotic mode again and can cause irreparable harm to your health, others or damage objects around.
The most frequently asked question that arises among novice craftsmen is the following: How to cut an angle grinder correctly: for yourself or away from yourself? Many do not betray this special significance, but in vain.
Bulgarian manufacturers advise their consumers the following: The tool should be used in such a way that the course (direction) of the cut coincides with the direction of rotation of the disc.
Experienced craftsmen have a clear answer to this question: You need to make a cut from yourself. This is for your safety. In case the angle grinder is pulled out of your hands, the tool will be thrown in the opposite direction from you. If you cut towards yourself, when the above situation occurs, the tool will fly to your feet. We will not describe the consequences. You can imagine them yourself.
If you are cutting parts or workpieces that have thick metal, cut them exceptionally straight.
When working on a part such as a corner or cutting a profile or shaped tube, which is usually quite long, cut the overhanging edge. Otherwise, if you make a cut in the place between the supports, such an outcome as a jamming of the disc due to the deflection of the workpiece is possible.
If you are cutting corrugated sheet (sheet metal sheeting), metal siding (metal siding) or metal tiles, take care of the presence of special anti-corrosion agents that need to be lubricated in order to avoid sudden corrosion.
In case you are cutting paving slabs or paving stones, get a special diamond cut disc.
Reinforced concrete, concrete and other similar materials must be processed with special discs for stone.
If you need to cut a gas or oxygen cylinder, be very careful, as it may explode due to the remaining trace of gas or condensation. It is better not to carry out such work at home.
If you need to cut glass or, for example, a mirror. The most trivial ceramic disc will suit you.
When working with material such as wave slate, do not use extra force to avoid chipping and unevenness.
It is possible to process rubber with an angle grinder, but not necessary. If you understand what we mean.
Grooves, springs, fittings or channel can also be cut with an angle grinder.
Need to cut drywall or polycarbonate? Do this very carefully to avoid chipping and breaking the material. You will need neatness if you need to cut glass mosaics. For example, if you are cutting off excess parts from a pasted arch, cover the cut and the part to be cut off with masking tape or construction tape. This minimizes the possibility of cracks and prevents debris from scattering on the floor after cutting.
HOW TO CUT TILES WITHOUT CHIPS Angle Grinder?
As we said above, the range of applications for the angle grinder is incredibly wide. She also acts as an excellent helper when cutting materials such as tiles or tiles. But, a logical question arises regarding the equipment: How is it better to work on tiles? To carry out this type of work, you need to get a grinding diamond wheel and a tile holder. It is hardly possible to work without dust with this material, so take care of a protective mask in advance.
Let’s take a closer look at the process itself and methods of cutting tiles or tiles without chips.
- The easiest way is to cut straight. Fix the tile well so that its edge remains suspended along the mowing line of the cut and get to work.
- The next method to be noted is cutting at a 45 angle. This method is more complicated than the first one. First, we cut the ceramic tiles with a straight cut. Then, when cutting, the angle grinder disc is guided at an angle and removed the unnecessary part. Next, we grind the cut with sandpaper.
HOW TO CORRECTLY CUT ANGLE GRINDER METAL?
To begin with, let’s talk about the dangers that await the master when cutting metal with an angle grinder, namely:
- Fragments of the disc, in the event of a break;
- Powerful stream of sparks and small abrasive particles;
- In some cases, the inability to hold the instrument in the hands.
Now, a few tips for working with metal.
If you have no experience in this type of work, then, for a start, it is worth practicing on unnecessary details. If in the process of work, you decide to change the cutting plane when the disc is inside the workpiece, this will immediately lead to its breakage.
To increase the life of discs, especially expensive ones, they need to be cooled. This is done with water. It is necessary to water the cutting area. It is advisable that you work with a partner who will carry out all these additional manipulations.
Also, breaks of 5-7 minutes every 20-30 minutes of work will help to increase the service life of the equipment, and the tool itself. This rule is especially important when working with household angle grinders. This way you will protect your instrument from overheating.
It should also be remembered that you should not put pressure on the angle grinder during operation, otherwise it may fail due to overheating, or the disc will jam. If you feel that performance is too slow, try changing the drive.
CAN the angle grinder CUT WOOD?
Many experienced craftsmen claim that cutting wood with an angle grinder is to be. Our opinion: it is really possible to cut wood with an angle grinder, but it is extremely unsafe, inconvenient, slow and of poor quality. And that’s why.
Firstly, during operation, the disc of an angle grinder gets very hot and becomes incredibly fragile. The slightest misalignment may result in a ruptured disc. You can find out about the consequences of this situation from the pictures on the Internet.
Secondly, when working with a disc equipped with victorious solders, these solders can easily end up under the skin. And this is a direct way to the hospital, because it will not be possible to remove them on your own, plus everything is fraught with infection.
Thirdly, when using a disc on wood, the teeth can grab more wood than you expect, and this, in turn, will lead to that. That the angle grinder will simply rip out of your hands. It is very dangerous!
We hope we have explained in an accessible way why you cannot use an angle grinder when working on wood and you will not even try.
But, as practice shows, many craftsmen at home resort to using an angle grinder in the process of processing materials such as chipboard, chipboard, laminate, OSB board or plywood. This should be cut as carefully and in compliance with all safety measures. Otherwise, you can not only spoil the material, but also be injured.
HOW TO EXACTLY CUT an angle grinder?
In order not to spoil the workpiece and make a high-quality smooth cut of the angle grinder, you will need to perform a number of preparatory measures, which we will discuss in this part of the article.
- Markup. All ingenious is simple. First we mark, then we cut. Take pipe cutting as an example. First, use a chalk or marker to apply the size, then use paper or duct tape. The main thing is that the edge is even. We take the selected auxiliary material and carefully wrap it around the pipe. Its boundary will be a clear and accurate marking of the cut. When performing work, it is important to remember that under no circumstances should you change the position of the tool stroke. Otherwise, the disc may jam or break. Also, you should not put additional pressure on the tool, as this will immediately be reflected in the curvature of the cut and spoil your workpiece.
- It is very important to choose the right thickness of the circle. There is a simple axiom at work: the thicker the material you are working with, the thicker the disc should be. When choosing tooling, consult with an expert in the field and pay attention to the marking of the grinding wheel applied to his shirt.
HOW TO SAFELY CUT AN Angle Grinder?
The work of an angle grinder is a matter that requires constant attention and control, because the consequences of accidents are irreversible. Therefore, before starting work, take care of the following:
- Take care of the protection of all parts of the body: face, hands, eyes.
- Clean the workspace from excess, especially the place where the sparks fly out, remove all combustible materials away.
- The workpiece to be machined must always be securely fixed.
- Be sure to install the protective cover.
- Hold the tool firmly while working.
- At the end of the work, wait until the rotation of the disc has stopped completely, place the angle grinder with the disc upwards so as not to damage it, unplug the tool from the mains and make sure there is no smoke or signs of fire.
WHAT CANNOT BE CUT with an angle grinder? BASIC ERRORS
The list below shows the materials you can work with the angle grinder. It is forbidden to work with materials that are not on the list.
- The angle grinder is perfect for cutting materials such as cast iron, metal, steel, copper, aluminum, iron, titanium. You can cut stainless steel or galvanized.
- With the appropriate attachments, you can also work with plastics, ceramics, glass, plexiglass and porcelain.
- Stone, granite, marble, asphalt, concrete or wall made of it, brick, porcelain stoneware can also be processed by an angle grinder.
An angle grinder is useful when you need to cut water pipes or old heating.
One of the main factors that guarantee the quality of work is the right tooling. If you have any questions or want to purchase discs, please contact our managers at the specified phones. They will recommend suitable discs and advise you on all questions of interest.
How to grind an angle grinder
Do not forget that sanding is always associated with a lot of dust. Do not forget about yourself when preparing for sanding! A face shield and a respirator are the best helpers when sanding. You can also find an option where the mask is combined with a good respirator.
The respirator filter will clog up very quickly, so you need to prepare several pieces at once for quick replacement. Only after thorough preparatory work can you start grinding.
Wood is a unique material. It can be sanded by hand quite well, but with an angle grinder you can achieve very good results. Some snobs argue that you can’t grind an angle grinder at all, but this is from ignorance and inability.
The main secret of the grinder is used at minimum speed. If the angle grinder has a speed switch, then there will be no problem. At high speeds, the sandpaper will clog very quickly and very tightly with wood. In this mode, it will not be enough for five minutes of work. Optimum speed no more than 6000 rpm.
Another secret is not to sand the entire wheel area. If you sand the entire surface, then circular marks will remain on the wood. So that no traces of sandpaper remain at all or they would be minimal, it is necessary to grind only with the upper sector of the circle. The movement of the machine should be along the grain of the wood.
With this method, you can get excellent results when sanding the lining. The board becomes smooth and does not retain tool marks. Do not just get carried away and change the emery pads on the circle in time.
The blockhouse is polished in a similar way. Here, it is desirable that the support plate is thin around the edge. With such a plate, it will be easier to sand narrow places where the logs meet. Otherwise, this work will have to be finished with a chisel.
How to make a sander from an angle grinder?
Such a question can be perplexing, because an angle grinder is an angle grinder. But it is very versatile and must be prepared for each operation. To prepare the angle grinder for grinding, you need to purchase a support wheel, which is installed directly on the machine shaft.
To process wood, you need to glue an emery cloth on this circle. The number of sandpaper is selected for the immediate moment of work. On sale you can find both a grinding wheel of the required diameter and emery wheels of the appropriate size. Velcro emery discs are also available, which are very easy and quick to change on the tool.
To convert our angle grinder to concrete grinder, it would be a good decision to purchase a special dust cover. It is good because it has a branch pipe for connecting a vacuum cleaner. The well-known casings are produced by Hilti. On the cover of this company there is a sliding sector that opens part of the wheel for grinding in the corners.
Grinding metal angle grinder is usually done with standard metal grinding wheels. They have different diameters, different thicknesses and different grains of the grinding surface. But, if you are going to grind an indecently rusted surface, then first you need to brush it over the metal. Such brushes of the required diameters are also on sale.
How to grind an angle grinder different materials
Even if you purchase and install the necessary accessories on your angle grinder, it still means nothing. Processing different materials requires certain knowledge. Without this, it will be difficult to achieve the desired quality.
We work on concrete
If it was not possible to purchase a branded protective dust cover with a nozzle for a vacuum cleaner, then you can do it yourself. To do this, we take a used bucket from under putty or glue with a diameter slightly larger than the circle of an angle grinder. Cut off the bottom part at a height slightly larger than the assembled grinding part.
We cut a hole in the bottom for installation on the gearbox and a hole for a plastic plumbing corner bend. Now we connect the vacuum cleaner hose to the nozzle and work calmly.
The grinding wheel must be suitable for stone processing. Concrete and concrete surfaces are preferably sanded with the entire surface of the wheel. This will save machining time, and level the surface plane well.
When sanding a concrete floor, it is necessary to constantly monitor the plane with a construction ruler, because, due to the different density of concrete, indentations can be made. For the treatment of butt joints between concrete fillings, it will be sufficient to achieve one level combination.
Sand concrete floors and surfaces well with a Matrix diamond cup. If the angle grinder is 150 mm, then the cup is 125 mm.
Grinding metal surfaces
Metal is ground according to different requirements. Most often, the metal is ground for painting or for further polishing. The main tool is recognized as a support cup with replaceable emery pads. The selection of sandpaper depends on the degree of processing and on the state of the metal.
When sanding, you only need to work with part of the disc. There should be no untreated areas on the surface.
It is advisable to prime the treated surfaces of ordinary steel with a primer. Moisture in the air can quickly coat metal and cause rust.
Concrete cutting with wall saws
Wall saws are used to cut concrete on larger scale and complex jobs. Less dust than an angle grinder, much higher productivity and efficiency.
Features of cutting a concrete monolith with a wall saw:
- Diamond cutting of this type is characterized by a large cutting depth, therefore, it is used for industrial cutting of hatches / openings, other elements with heavy reinforcement in partitions, walls, floor slabs. Works are carried out in the shortest possible time.
- To accomplish the task, you need to provide free one-way access from 30-35 centimeters.
- It takes a lot of water for cooling (up to 15 liters per minute), so it should be possible to restock.
- Waste water can be collected with a standard vacuum cleaner.
- To operate the equipment, an alternating current network with a capacity of 32A and a voltage of 380V is required.
Dust-free concrete cutting: how to saw an angle grinder with your own hands, a tool
Cutting concrete without dust is practically impossible, since in the process of sawing and processing stone, one way or another a lot of dust appears, the volume of which can only be reduced. But it is also advisable to do this, since too much dust in the process of performing work brings a lot of troubles: it spoils the tool and blunts parts, settles in the lungs and on all surfaces in the room.
With the use of modern equipment, it has become easier to cut concrete, there are special cutting tools, consumables for them. Devices can be hand-held or stationary, powered by electricity or other sources. Generally, all concrete cutting tools are equipped with diamond parts, chains, discs, crowns, brazing, etc.
Cutting concrete with hand tools
Due to the strength of the material, not every hand tool is suitable for working with it. Most often, an angle grinder is used for these purposes (it is also UShS, an angle grinder). For cutting concrete, a special nozzle is used in the form of a diamond wheel, which can be solid, segmental, combined.
Types of angle grinder diamond wheels that can be used to cut concrete:
- Solid is made with a continuous diamond cutting edge, so that no chips appear in the work. The nozzle heats up periodically, therefore it requires constant cooling with a stream of water.
- Segmented disc the base is solid, the edge is segmented. The wheel is inexpensive, but wears out quickly from durable materials. Used exclusively for dry cutting.
- The combined (aka turbo-diamond) disc is considered universal, capable of withstanding maximum loads, even reinforced concrete can be cut with it.
The attachments are selected in accordance with the material to be cut, as well as taking into account the type of work and conditions. Reinforced concrete with depressions more than 10 centimeters is cut only with high-strength discs (turbocharged). All segments of the disc are attached to the blade by laser welding or silver soldering. The first can only be used for dry cutting, the second with wet.
The wheel should be made with an inner diameter corresponding to the diameter of the angle grinder. The speed of rotation of the disc is also important, it is desirable that it be higher than the indicator of the angle grinder. Depending on the selected type of cutting and the correct selection of the tool, the amount of dust that appears during work may vary.
So, if you cut concrete for a long time with an insufficiently strong and ineffective tool with nozzles, there will be a lot of dust, and the result is minimal. Dust can be reduced by using the wet cutting method. Water keeps the tool from overheating and prevents dust from forming. So it is possible to speed up the work and increase the resource of the diamond tip.
The water supply can be organized in different ways from spraying concrete with a spray gun periodically during work to fixing the hose on the tool so that the liquid flows in a continuous stream onto the disc.
A convenient attachment is made from an ordinary plastic canister. You will also need a cutter, a container of the required size, the neck of which, in its diameter, will dock with the vacuum cleaner hose.
Further, on both sides, you need to make mounting holes so that you can easily change the direction of rotation of the disk. A slot of a suitable size is made for the circle, and another hole is cut for mounting the cutter. Carefully connect the hose to the neck of the canister, then fasten it with a transition ring with a clamp. The angle grinder is sent to the casing, all elements are securely connected. The hole that is not used is closed with a lid.
To make the cut even, you first need to apply markings, then wooden blocks are attached along the mowing line. After that, you need to make a shallow cut up to 1 centimeter, remove the limiters, and continue working. All manipulations must be performed exclusively in a respirator, goggles, gloves, overalls.
Concrete cutting with floor saws
Seam cutters are also often used for tasks of this kind. There are some features that are desirable to explore.
Key features of cutting concrete with a floor saw:
- Usually one of two types of productive equipment is used: gasoline / electric. The latter option requires a network connection, gasoline units can be used anywhere (in the field, in open areas, to create expansion joints in the road surface, etc.).
- It is necessary to provide a supply of cooling water under high pressure, which will eliminate the risk of overheating and reduce the volume of dust.
- For gasoline devices, it is important to provide the ability to ventilate the supply and exhaust type if work is carried out in a closed room.
- Electrical equipment will need a 380V AC connection.
Is there a technology for cutting concrete without noise and dust
Thinking about what to cut concrete, you need to take care of reducing the amount of dust that inevitably appears in the process of performing work. In certain cases, nothing can be done and you have to work in difficult conditions, but in others it is quite possible to remove dust. The main thing is not to violate safety requirements and use proven methods.
Different methods are used to cut concrete: hand, machine, wet and dry. The first two are due to the type of tool chosen, wet assumes the effect of water on the cutting part and on the concrete surface itself, the dry method does not use water supply. Regardless of the chosen cutting method, the amount of dust accompanying the process is always large enough.
The most common methods for cutting concrete are:
- Diamond cutting of partitions and walls with hand tools (angle grinder and others).
- Diamond cutting using a stationary wall saw.
- Diamond cutting with floor saws.
- Use for cutting rope.
When using a hand tool (most often an angle grinder), you can connect a construction vacuum cleaner to it, which will suck in almost all the dust that appears during the cutting process. If there is no possibility of connecting the tool to the vacuum cleaner, everything can be done by hand.
What you need to create an adapter for a construction vacuum cleaner:
- Sewer outlet made of polypropylene with a diameter of 50 mm, at 45 degrees.
- Reinforced tape (it is more reliable).
- High quality masking tape.
The process of creating a dust extraction attachment:
- Place the angle grinder as firmly as possible on a table or floor so that it lies upside down with a disc parallel to the plane of the base.
- Take the branch with pliers or a clamp, turn on the angle grinder and cut the branch pipe along the body, 3 centimeters under the tool casing.
- Reinforced with tape very tightly, in tightness, tie the bend to the body of the angle grinder, slightly going into the saw blade (a few centimeters). The fixing of the branch pipe must be secure so that it is fixed firmly.
- Mask the open side of the casing with masking tape, thus connecting it to the outlet. Then you can connect a construction vacuum cleaner and remove dust during operation.
Such a system of design changes in the tool does not imply, but before using it, it is advisable to consult with a representative of the manufacturer for the possibility of making improvements.
Cutting concrete with ropes
This method is used less often than all of the above, but is also relevant when performing certain work.
How concrete is cut using special ropes:
- To accomplish the task, a special rope and diamond bits are used, as well as a drive. You can cut any structure without limitation in thickness (including columns, for example).
- For optimal operation of the equipment, it is imperative to ensure the supply of cold water under high pressure and a network with a voltage of 380V.
- The cost of work can be different and depends on such factors: the type of material, the type and size of the opening, the thickness of the structure.
- Dust when using this method appears a minimum amount, noise is also created a little.
- Wire cutting allows you to quickly cut openings of any configuration with perfectly straight edges, even where access is limited.
Tips for cutting dust-free concrete
During repairs or construction, sometimes it is required to carry out work on concrete: cut out an opening for a window, a niche, cut walls for wiring. Masters know how many small particles are formed in this case. Cleaning after such events is very laborious. We offer you to figure out whether it is possible to cut concrete without dust and how to organize this process.
Concrete wet cutting technology
The use of water allows the angle grinder to cut concrete without dust and overheating of the tool. The technology allows to solve several problems at once:
- Extend the resource of the diamond tip,
- Avoid dust formation,
- Increase work speed.
One way to ensure the water supply is to continuously secure the hose so that the liquid will flow onto the disc. If there is no plumbing in the work area, an assistant can be involved in the process. He will use a primitive plastic bottle fixture to wet the circle. At the same time, the incision site is moistened with a liquid. This must be done carefully so that water is not poured into the instrument.
The method is not very applicable in multi-storey buildings, since there is a risk of flooding the neighbors from below.
How to choose a disc for an angle grinder
Concrete is a durable material, so it is rather difficult to work with it. To perform cutting, an angle grinder (angle grinder) is most often used. This tool is better known in everyday life as an angle grinder.
A diamond wheel is used as a nozzle. Depending on the design features, they are divided into several varieties:
- Combined (turbocharged).
The first option is a solid base with a segmented edge. Such a circle is notable for its low cost, but is not very suitable for working with durable materials. It should also be taken into account that it is used only for dry cutting. The solid disc has a continuous diamond edge to prevent chipping during operation. Such a nozzle heats up quickly, therefore it must be cooled with a continuous water jet.
Before buying a nozzle of the right type, you need to figure out what material you will have to work with. Reinforced concrete is reinforced with metal rods, which the cutter may stumble upon in the process. Therefore, if a deepening of more than 10 cm is expected, use discs of increased strength, that is, turbocharged. Fresh concrete is more abrasive, over time the material hardens, its strength increases. This factor should also be taken into account when choosing a circle for cutting.
Segments of the disc are attached to the blade with silver solder or laser welding. The first option is more suitable for wet cutting, the second is used only for dry cutting. When choosing a suitable diamond wheel, you should pay attention to its diameter, which should be suitable for the parameters of the angle grinder. The rotational speed of the disk is also an important criterion. It is better if it is higher than the maximum possible indicator stated in the technical characteristics of the angle grinder. This will ensure optimum performance.
How to make a casing for a vacuum cleaner with your own hands
An angle grinder with a built-in vacuum cleaner allows you to get rid of small particles of material formed in the process of cutting an angle grinder. But what if there is a need to cut concrete with an ordinary tool without additional options? The simplest solution would be to purchase a casing for a vacuum cleaner separately, or to make a device yourself. You can attract an assistant who will collect the particles formed during the sawing with a vacuum cleaner.
You can easily make a convenient attachment from a simple plastic canister, which is often used to sell car anti-freeze. For work, you will need a construction cutter and a container of a suitable size, the neck of which is suitable in diameter to the vacuum cleaner hose.
The manufacturing sequence is as follows:
- Fitting holes are cut on both sides so that you can easily change the direction of rotation of the disc.
- A slot of a suitable size is made under the circle.
- Another hole is cut to attach the cutter to the angle grinder.
- The hose is docked with the neck of the canister and secured with an adapter ring with a clamp.
- The angle grinder is placed in the casing and all elements are connected.
- Cover the unused opening with a lid.
A good dust collector can also be obtained from a simple five-liter plastic bottle. It is attached using a standard protective cover, and the vacuum cleaner nozzle to the neck. This design is suitable for any kind of work, except for chasing.
One final tip: in order to make the cut straight, the markings are first applied. Then wooden blocks are fixed along the mowing line. After that, a shallow incision up to 1 cm is made, the stops are removed and the work continues. Throughout the entire process, coolant is supplied to the disc blade. All manipulations must be carried out with goggles, a respirator and gloves.