How to cut concrete with an angle grinder without dust

how to saw with an angle grinder with your own hands

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. As a rule, all concrete cutting tools are equipped with diamond parts. chains, discs, crowns, brazing, etc.

concrete, angle, grinder, dust

Hand carvers

Such equipment for cutting concrete is most often called an “angle grinder”, but in the professional field, this device is called an angle grinder (angle grinder). Such a hand cutter allows you to make openings in the wall up to 13 cm thick. Tools of this type can have different power, they are also equipped with special attachments that are fixed on an angle grinder using a screw thread. Most often, cutting is performed using grinding, roughing and cutting diamond discs.

Helpful! When choosing diamond cutting discs, it is recommended to buy products with cuts for ordinary concrete and without cuts if you plan to cut reinforced concrete structures, since the protruding elements of the disc will cling to the reinforcement.

Hand cutters are highly maneuverable, which allows for large volumes of work. On the other hand, angle grinders and diamond blades for concrete are only suitable for small areas. If you use such equipment for large construction projects, then you or your workers will quickly get tired.

It’s important to know

Modern manufacturers offer a variety of equipment models, so it will not be difficult to find a specific model of equipment in the regions (as well as companies or specialists who will quickly and efficiently carry out the work). But you need to remember some of the nuances.

HOW TO CUT CEMENT BOARD WITHOUT DUST

Things to keep in mind when cutting concrete:

  • Wall saws are not used in multi-storey panel-type buildings because of the risk of flooding the lower floors with water. Also, the machine is not suitable for work in a confined space, if necessary, perform small volumes of cut.
  • To reduce noise, you can cut openings in parts (at least 6 parts). In this case, the price of work rises and depends on the number of cut pieces.
  • All holes / openings in the supporting structures are made only by certified companies and in strict accordance with the rules.
  • Legalization of hatches / openings in load-bearing walls requires an appeal to state authorities with the provision of a full package of documents.

Dust-free concrete cutting is a complex task that can only be partially achieved. It is very difficult to completely get rid of dust, but its amount can be significantly reduced thanks to the correct choice of equipment and nozzles, the cutting method, as well as the use of a construction vacuum cleaner and the creation of special devices for collecting dust.

An alternative way to reduce dust when working with an angle grinder

There is another way to reduce the amount of dust that gets into the air, which does not require a special dust collector or a vacuum cleaner. This is the usual wetting with water. You need to use it as follows:

  • a small garden pump sprayer is taken and filled with water;
  • in the process of working with an angle grinder, the surface to be treated is constantly sprayed with a stream of water in the immediate vicinity of the cutting or grinding place.

You can replace your garden sprayer with a household spray bottle or a regular plastic bottle with a hole in the lid. However, such a replacement is less convenient during operation.

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Despite the fact that builders use this method quite often, it has two significant drawbacks. First, it requires a third hand, which is inconvenient when working alone. Secondly, the dust moistened with water does not go anywhere, but turns into liquid mud, which will also need to be removed.

Water wetting can also be potentially hazardous to the power tool itself. Spraying during work must be done so that water does not fall on the angle grinder, and the jet is directed directly to the cutting site.

How to Cut Concrete with a Angle Grinder

Diamond cutting of doorways in walls. fast and efficient

If you are unhappy with the existing layout of your apartment, or if a technological hole is required, then diamond cutting of openings in the walls will come to the rescue. This method allows you to cut an opening in the wall, even in those apartments in which cosmetic repairs have already been made, without fear of damage.

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 replenish stocks.
  • Waste water can be collected with a standard vacuum cleaner.
  • To operate the equipment, you need an alternating current network with a capacity of 32A and a voltage of 380V.

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.
  • When using this method, a minimum amount of dust appears, and the noise is also small.
  • Wire cutting allows you to quickly cut openings of any configuration with perfectly straight edges, even where access is limited.

Dust-free concrete cutting: how to saw with 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. As a rule, all concrete cutting tools are equipped with diamond parts. chains, discs, crowns, brazing, etc.

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.
  • When using this method, a minimum amount of dust appears, and the noise is also small.
  • Wire cutting allows you to quickly cut openings of any configuration with perfectly straight edges, even where access is limited.

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 (aka 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.

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Types of angle grinder diamond wheels that can be used to cut concrete:

  • Solid. 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. solid base, segmented edge. The wheel is inexpensive, but wears out quickly from durable materials. Used exclusively for dry cutting.
  • Combined (aka turbo-diamond) disc. considered universal, capable of withstanding maximum loads, even reinforced concrete can be cut with it.

How to cut without dust 2

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. wet.

The wheel should be made with an inner diameter corresponding to the diameter of the angle grinder. The rotational speed of the disc is also important. it is desirable that it be higher than the index of the angle grinder. Depending on the type of cutting chosen and the correct selection of the tool, the amount of dust that appears during work may be different.

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. You can reduce the amount of dust by using the wet cutting method. water prevents the tool from overheating and prevents the formation of dust. 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 to 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 hose of the vacuum cleaner.

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 an adapter 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 the 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.

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.

Cutting concrete is a targeted mechanical action on the monolith by rotating parts of the tool. Cutting is not accompanied by impact noise, but it always involves noise from the electric motor of the tool drive and the operation of its moving parts, which cut a groove in a stone or cut reinforcement, cut into pieces, etc.

Different methods are used to cut concrete. manual, 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 a hand tool (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.

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What you need to create an adapter for a construction vacuum cleaner:

  • Sewer outlet made of polypropylene with a diameter of 50 millimeters, 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 the table or floor so that it lies upside down with a disc parallel to the base plane.
  • Take the branch with pliers or a clamp, turn on the angle grinder and “saw” the branch pipe along the body, 3 centimeters under the tool casing.
  • With reinforced tape very tightly, in an interference fit, tie the bend to the body of the angle grinder, slightly going into the saw blade (by a few centimeters). The fixing of the branch pipe must be secure so that it is fixed firmly.
  • Glue 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.

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 replenish stocks.
  • Waste water can be collected with a standard vacuum cleaner.
  • To operate the equipment, you need an alternating current network with a capacity of 32A and a voltage of 380V.

Concrete cutting with floor saws

Seam cutters are also often used for tasks of this kind. There are some features to be learned.

Key features of concrete cutting 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 possibility of ventilation of the supply and exhaust type if work is carried out in a closed room.
  • Electrical equipment will need a 380V AC connection.

It’s important to know

Modern manufacturers offer a variety of equipment models, so it will not be difficult to find a specific model of equipment in the regions (as well as companies or specialists who will quickly and efficiently carry out the work). But you need to remember some of the nuances.

Things to keep in mind when cutting concrete:

  • Wall saws are not used in multi-storey panel-type buildings because of the risk of flooding the lower floors with water. Also, the machine is not suitable for work in a confined space, if necessary, perform small volumes of cut.
  • To reduce noise, you can cut openings in parts (at least 6 parts). In this case, the price of work rises and depends on the number of cut pieces.
  • All holes / openings in the supporting structures are made only by certified companies and in strict accordance with the rules.
  • Legalization of hatches / openings in load-bearing walls requires an appeal to state authorities with the provision of a full package of documents.

Dust-free concrete cutting is a complex task that can only be partially achieved. It is very difficult to completely get rid of dust, but its amount can be significantly reduced thanks to the correct choice of equipment and nozzles, the cutting method, as well as the use of a construction vacuum cleaner and the creation of special devices for collecting dust.