Which way to saw corner grinding. How to saw without dust

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How to work properly a corner grinder (corner grinding)

The operation of an angle grinding machine (corner grinding, in prosta of corner grinding), requires certain knowledge, skills and compliance with safety regulations.

With the help of corner grinder, the surfaces are cleaned, cut, and polished materials of different origin, and also the edges of the working tool. You need to use the device taking into account the class, such as the processed material and the type of operation. Correctly cut metal and perform a specific type of operation will help knowledge of the appointment of nozzles. They are chosen and set depending on the task. Information about the work that can be performed by a corner grinder is provided by the manufacturer, and it is also indicated on the disks (circles), together with the technical characteristics. In most cases, it may also indicate on the packaging of goods.


We worked at the facility, made metal heating, I went to cut off a piece of the pipe. Typically, I cut the corner grinder on myself (sparks for myself), this person worked on the same object, laid down the roof, came up to me and almost an orderly tone advised me to change the direction of rotation of the circle from myself. I asked why I should do this, but the arguments except “so correctly”, he did not really provide. We naturally began to argue with him, but they still did not come to a consensus.

On this occasion, I did not find specific rules and everyone should choose the poem in which direction the sparks should fly, because it is not for nothing that the manufacturer makes the design of the corner grinder so that the direction can be changed on its own. But on the basis of experience, I will express my thoughts, I will tell you what I came in terms of security and convenience of using this tool over 15 years.

Let’s look at the option when the direction of sparks is carried out from ourselves:

For me personally, it’s hard enough to work as a tool in this position. The corner grinder should be kept as perpendicular to the surface, if the disk shifts a little back, then the tool can easily be pulled out of the hands. Sparks, under certain conditions, fly directly into the face, and if the disk is open, then you can become without eyes.

In this position, the disk is more often bite, the tool is not very stable, and it seems to me that it is much easier and more convenient to pull on yourself than to push forward. In general, for me this method is extremely not convenient and not safe.

Now let’s look at the option when the sparks fly on themselves or for themselves:

In this position, I personally are much more convenient for me. The tool is more stable and controlled, even if it tears it out, it will fly forward and you will have time to react and hold it. Sparks do not fly into the eyes, again, if the disk is open, the fragments will fly under the feet. Anyway, I think a more convenient situation cannot be invented.

By the way, many did not know that the position of the disk rotation can be changed for this you just need to twist the handle and button, and also shift the protective casing in the other direction.

The correct position of the cut parts and materials

Before starting work with a corner grinding, it is necessary to properly prepare the workplace and provide for some nuances:

  • The cut should be carried out in the direction of rotation of the cutting disk, while parts of the material should not be pressed to each other, but to make an effort on the break.
  • Metal is extremely rarely broken until the end of the saw, unlike wood.
  • Do not saw a blank of metal with a corner grinding, if the ends of the workpiece are recorded on two supports. In this case, the disk may turn out to be clamped at the end of the saw, and the apparatus will break out of the hands.
  • In the process of performing the work, the cut plane should not change, do not allow distortions.
  • No need to press hard on the corner grinder, t. to. You can break the disk. If the cutting goes too slowly, the cutting element should be replaced.

Fixing the processed parts

The workpiece during processing should remain motionless. It needs to be reliably and rigidly attached in a vice or fixed on a fixed heavy structure using clamps. Heavy objects that are difficult to move due to their large weight, it is allowed not to fix. It is strictly forbidden to hold the corner grinder with one hand, and not two, while not fixing the harvesting harvest, but holding it with the second hand. In this case, the part may shift relative to the detachment circle and there will be a danger of jamming.

The part is fixed in such a way that sagging and bending in the cutting zone are excluded. Cutting cutting will lead to clicking in the cutting area and reactive impact. It is better to cut the protruding edge. if you cut in the middle, then bite of the disk cannot be avoided.

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Grinding rules

The grinding process should be carried out using cutting circles of normal thickness. Their choice directly depends on the processed material.

Grinding wood

Grinding a wooden surface using a corner grinder includes three stages:

  • Preliminary preparation. If traces of varnish or paint are present on the surface, they must be removed before grinding. This will require an angular grinder with a special roller nozzle.
  • Rough grinding. For this stage, it is necessary to use grinding and polishing circles. If these are not in the arsenal, you can take a regular disk and fix the sandpaper to it.
  • Thin grinding. If such a grinding is needed by a wooden surface, it is enough for its organization to put a sandpaper zero on the disk.

Grinding concrete

Grinding the concrete surface can be done in two ways:

  • Dry grinding method. It is a rather long procedure, during which a large amount of dust is formed, so you need to use a respirator to protect the respiratory tract.
  • Wet grinding method. It is usually used to process the flooring of mosaics or marble crumbs, less often for concrete. Helps to get the perfect surface, which in appearance is equated with polished.

Grinding metal

For a metal surface, a petal or abrasive circle will be required. The first option is used for high.quality grinding of an already flat surface, since it cannot be able to eliminate solid irregularities. The second option is able to eliminate protrusions on a metal surface (seams from welding or burrs left after cutting). High.quality work can be obtained only by combining these two discs.

Ways to cut stainless steel

Stainless steel refers to alloy steels, which are quite difficult to process. You can cut this metal with 2 methods:

  • thermal (metal melts under the influence of high temperatures);
  • mechanical (cutting is carried out using a cutting tool by removing a layer of metal).
  • Oxygen cutting (gas-fiber cutting). Metal melts under the influence of an electric arc. Oxygen, which is supplied to the cut zone, contributes to the combustion of metal and the removal of toxins from the working area.
  • Electric cutting. The cutting process consists in destroying the surface of the workpiece under the influence of an electric discharge.
  • Hydroabrase cutting. The metal is separated under the action of a thin stream of the abrasive mixture supplied under super.high pressure.
  • Laser cutting. Processing is carried out by a thin laser beam.
  • Plasma cutting. A stream of plasma acts as a cutting tool.

The mechanical processing of stainless steel is performed using the following tools:

  • Scissors for metal. They cope with sheets that have a thickness of not more than 0.5-1 mm.
  • A circular saw. Cutting is carried out using a trim abrasive circle. In this way you can cut the details of the large thickness.
  • Corner grinding machine. When cutting the metal of the corner grinder, special thin stainless steel disks are used with a diameter of 125 mm. Non.specialized equipment can subsequently cause corrosion phenomena in the metal.

According to the rules of cutting, the part should be securely fixed or rested on something, otherwise the workpiece can take aside and the cut will be disturbed. It will be necessary to additionally process the cut edge, if cut without observing the technology.

How to saw or cut a corner grinder properly

Various materials behave differently during the treatment of corner grinding. Some immediately overheat and break, others are deformed, others do not want to succumb to processing at all. All the subtleties of working with corner grinding is difficult to know, but practice requires to know at least something.

Cut the tiles of paving, tile, porcelain tile

For cutting paving slabs, a special circle with a diamond notch is required. Marking is made on the tile, and on this marking, an incision is made to almost half the radius of the circle. If the corner grinder with a large circle, then in one pass you can cut the tile immediately to the entire depth. The main thing is that it is no more than the radius of the circle. If the radius of the circle is insufficient, then the tile is turned over and oncoming cut is done.

Tile tiles without chips are better processed by a cutting circle for stone. A fishing line for a trimmer is applied to the tile, along which a contour cut is made. Then the depth gradually increases. Когда прорезанная часть станет больше, плитку кладут на край стола и переламывают по линии. Irregularities and roughness can then work out.

Porcelain tile is well processed around the stone. The cutting technology is no different from the technology of cutting tiles.

Cut the corner grinder wood

Compared to other building materials, the tree has always been and remains the most malleable in processing. For corner grinder, the release of a wide variety of discs for cutting wood is established.

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The most ordinary disk, to which we have long been accustomed to the circular saw. The main feature of the selection of such a disk is that the calculated speeds of the corner grinder and disk must match. Only in this case it is possible to cut it smoothly and without combustion of wood.

Such a disc easily cuts wood in any direction, but traditionally prefers to cut across. Not only raw wood is easily cut, but also trees knots. It is convenient to dissolve boards on the bars or planks. For a large volume of such work, an angular grinder must be fixed in a stationary. Get a complete analogy of the circular saw.

Pressed wood materials of any density are very simple. And, if it is necessary to cut a wooden panel with nails filled, then a disk is produced for such work. He is not afraid to meet with nails. This universal disk is made from tungsten carbide by Bosh. Marking Bosh Carbide Wheel disc. Produced in size 76, 115 and 125 mm.

Corner grinder on brick, concrete, concrete ring

Cutting brick and concrete is performed using special circles for stone. The brick is easily cut, the main thing is to correct it before the sharp and not to use your leg as a clamp.

The concrete plate or concrete is cut practically without problems. But the concrete ring creates some problems. Not concrete itself, but a steel reinforcement invested in it. The circle in the corner grinder experiences a large load during concrete, and the reinforcement harms it.

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To shorten the ring to a certain value, make a cut from the outer part of the ring. Then the cut part is broken with a sledgehammer, and the protruding reinforcement is cut around the metal.

Corrugated board, metal and sheet metal

The corner grinder was originally designed for cutting and grinding metal, so cutting any metal is its element. For sheet metal of different thicknesses, select a certain thickness of the circle, select the rotation speed and perform cut along the drawn lines. On the way to the extreme cutting point, you need to drown a slightly drowned a corner grinder so that the cutting boundary does not have a bevel.

According to this technology, you can cut out different geometric shapes from a sheet of metal. To cut a square or rectangle, you need to draw the dimensions on the sheet. Install the circle of corner grinding abroad abroad and make a metal gap. When all four sides are cut, cut out the corners.

Does not cause difficulties cutting corrugated board. They start from any edge or in the middle, if it is required. The only remark is that when cutting thin metal, a torn cut is formed on the back. To avoid injury for the purity of work, this cut is best changed.

Cutting angular grinding pipes and gas cylinders

A large diameter pipe, just like a gas cylinder, is not an exception to the operation of the corner grinder. A large diameter pipe can be imagined how a metal sheet. The complexity is cutting the cylinder in which the trace of gas or condensate remains. This is a very dangerous possible explosion.

To protect the cutting of the cylinder, it is necessary to twist the valve. It is difficult to do this, because over time, the carving fuses tightly. In this case, it is necessary to weld the cylinder for the stand, which is located in its lower part, to the massive plate or frame.

On a welded cylinder, it is easier to turn the valve. In the vacant hole, water is poured to overflow, and then proceed to cutting corner grinders. Cutting the cylinder does not differ from cutting a large diameter pipe.

Cutting glass

There are no problems for cutting glass for corner grinder. For this operation, you can use the cheapest circle of ceramics. A light contour cut is made, and then it deepens. The cut glass is laid out onto the edge of the table and rolled over.

Cutting angular grinding of glass pipes can be considered using an example of cutting a conventional glass bottle. The bottle is laid in a parted vise or invested between two wooden bars. Turning it, making it, make a cutting grinder. The bottle is rotated until the unnecessary part simply disappears.

Why many who work with a corner grinder work from themselves?

There are several answers here. Firstly, a person does not know how to work with a corner grinder, he picked up this tool for the first time in his life. According to the logic of things, sparks from an angular grinder should not fly to a working one, since the pants will burn faster, and the disk, if it turns around, will fly right into the legs.

Therefore, the one who does not know takes an angular grinder and cuts from himself. However, this is the first and most gross error. Trying to save his pants, thereby he makes the danger of himself, because it becomes simply impossible to keep the corner grinder when jaming the disk.

What happens in the end? Когда диск клинит, или теряется равновесие, тело по инерции движется вслед за вращающимся кругом, и вот здесь может случиться беда. Unable to hold the corner grinder in the hands or even holding it, but not completely, you can get a severe injury.

In simple words, when the corner grinding of a corner grinding occurs, only one hands participate in holding the tool. If the operation of the corner grinding is being carried out, then the case and legs are connected in addition to the hands, so it becomes much easier to hold the tool.

Types of abrasive circles and nozzles for corner grinders. Which we use in work

2.one.one. Cut.off circles

The name here speaks for itself and the purpose of the disk is intuitively clear. If you saw at least once, you will not confuse. Circles of this type are potentially most dangerous for the operator.

To cut off exactly you have to look into the cut plane with a risk to get a fragment in the forehead, if the cut.out circle falls into fragments. Below will be a photo of excellent adaptations that allows you to level this annoying drawback.

2.one.2. Grinding circles

Designed for grinding surfaces. Welders use it to clean the weld from slag. Visually looks like a very thick detachment disc, but naturally not. We’ll talk separately about marking separately.

2.one.3. Rittle

2.one.3.one. Circle of petal (petal)

Has a characteristic ribbed surface.

It does a great job with pendric work and grinding of flat and end surfaces.

Not abrasive circles, but I would like to mention these indispensable things when processing hard-to-reach surfaces, for example, the inside and angles of the P-shaped profile.

It is extremely desirable to work with roller nozzles on grinds with a speed control regulator, as a superhumine angular velocity in this case is not needed and only interferes. gives strong vibration and knocks out the tool from the hands.

The rapidly-intended abrasive material is fixed on a special base of the grinder using Velcro and serves to eliminate small defects.

2.2. In size

Look into the instructions for the angular grinder and read which disks you need to purchase. The size. The outer diameter of the disk depends on the size of the angular grinder for which it is intended and can be:

115 mm. The most portable option. It is usually acquired for grinding work, TK cut depth with a new cutting disk does not exceed 30 mm. In this case, the disk in the work wears out and its diameter will be even smaller.

125 mm. Popular and most common option for the range of work-dacha. A successful combination of compactness and power with a low weight angular grinder. On sale a wide range of circles and nozzles for this size.

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180mm, therefore, an angular grinder designed for an abrasive circle with a diameter of 150mm is referred to highly specialized and not the most practical for the widespread use of power tools.

180 mm. Copes with relatively thick metal structures and pipes of large diameter.

230mm. For household needs, it is rarely required, but aptly. Not suitable for finishing work. Very convenient for processing large arrays of stone: cuts concrete beams, stone, brick. Differs with an impressive cut depth of up to 70 mm and the ability to clean the surface of a large area. The average weight of such Bulgarians about 5 kg imposes obvious physical restrictions.

The thickness of the cutting disk from 1 to 3.2 mm. It is difficult to give unequivocal recommendations for choice, here everyone decides on their own based on standing tasks and personal preferences.

The thinner the cut.out disk is the easier to saw, but faster than the wear of the working surface (more often you need to put a new disk) and for some reason on the forums often write that the probability of destruction during disk skew (the worst), but according to my observations, the thin disk is more flexible and more flexible and more flexible and more flexible and more flexible and more flexible and more flexible and more flexible disc and more flexible and more flexible disk “plays” due to reinforcement.

The smaller the diameter, the higher the working turning of the corner grinder. For example, the angular grinder 150 and 125 differ not only in the size of the protective casing, but also with gear numbers of gear pairs. The use of a disproportionate disk, for example, from 150 for an angular grinder of 125mm is strictly prohibited!

2.3. On the processed material

2.3.one. On metal or concrete

The inscription (“Steel”. a disk of steel, “concrete”. concrete). In our case, the inscription is duplicated in Russian and English. Color (blue. according to steel, green. in concrete), sometimes a graphic image of the material is found.

Never use saw wheels for wood to work on a corner grinder! recently, this far from the most successful idea could be realized only by individual craftsmen who fired homemade spacers for installation on a corner grinding of a disc from a circular saw.

Today you can find on sale metal detachment circles for wood work, which are constructively suitable for your tool in the landing inner diameter, which creates the illusion “The manufacturer knew what he did”, but not a single resuscitation doctor will agree with this.

People get the most terrible injuries when using a corner grinder in a chainsaw mode. When it hits the bitch, a blade of disk occurs, an angular grinder in a split second is pulled out of the hands with a flight along an unpredictable trajectory. Here is a similar case, only the role of the bitch was performed by a nail.

My comrade decided to cut the already installed panels of the wood.fiber slab, which arched from dampness. Premmed disklarpy disk on an angular grinder.

which, corner, grinding, dust

The first two panels drank normally, on the third panel came a tiny clove (finish) corner grind. Result. A knee torn in the trash and disability at 20 years old.

Quote from the Price-Altai forum.ru

Important! Saw a tree only benzo, electric, circular saw or hand hacksaw. In this case, refuse the universality of the corner grinding in favor of your own safety!

which, corner, grinding, dust

Precautionary measures

An angle grinding machine is a dangerous tool. When working with it, a number of conditions should be followed:

How to Cut Tile Without Dust.- by Home Repair Tutor

  • It is forbidden to use a tool without goggles;
  • Before cutting or polishing, check the suitability of the disk at idle;
  • Clothing should close their hands and protect from red.hot sparks;
  • You can not remove a protective casing from an angular grinder;
  • During cutting on the plane, the master and assistant should be on the side of the tool;
  • The unit cuts the material under its own weight, and the excess load will lead to deformation or jerks;
  • Work without a break leads to overheating of the equipment and fatigue of the master, who should hold tightly the angular grinder in his hands, observing the angle of cutting;
  • The processed workpiece must be firmly fixed;
  • It is impossible to grind the details by the side of the cutting disk, because for such work there are specialized circles;
  • Within the section of the work is the master and his assistant. All other people go to a safe distance;
  • The radius of the cutting circle should correspond to 1/6 of the thickness of the workpiece.

Work with defective disks

The threat to health often comes from a deformed cutting disk. Even a slight defect at high speed manifests itself from an unexpected side. Chips, crack, lack of a small piece of disk leads to its loosening, which is why often the angular grinder simply flies out of hand. Therefore, before proceeding with the cutting of preliminary, it is better to check for the presence of defects, and this is done immediately before starting work, because damage could appear after falling or external effects on the disk. Sometimes they can step on the plate, but the master simply will not notice this.

Despite numerous warnings that it is impossible to work with defective disks, there are situations when the master simply visually did not see defects. Such situations are constantly found and therefore it is necessary to follow a number of rules in order to protect your health as much as possible:

  • Before each installation or cutting start, it is necessary to check the consumable material for defects;
  • Work exclusively in an individual protection tool: mittens, protective glasses or a protective mask.

The corner grinder is most often on weight in the hands of the master and has no support point, therefore, the process of cutting or polishing should be approached maximum assembled and sober. People with an unbalanced psyche or poor health are prohibited from starting work with corner grinder.

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