How to hold a corner grinder correctly. How to choose the right corner grinder for cutting metal

How to properly and safely cut metal with a corner grinder?

The angular grinding machine is considered extremely traumatic equipment, so it is important to know in advance how to properly cut the metal with a corner grinder to avoid injuries and cope well with the task. It is necessary to monitor compliance with safety measures during operation and use personal protective equipment: use a respirator, put on protective gloves or mittens, glasses, etc.

The cutting equipment should be used strictly for its intended purpose, all work is carried out using special metal circles. It is strictly not recommended to remove the protective casing. How to work with a corner grinder, look at

The correct position of the tool

Cutting corner grinding should be safe, so there are some requirements for the position of the tool in space:

  • The corner grinding machine should be conveniently and tightly held with two hands.
  • A stable position should be taken so that with large loads or when hit, it is possible to hold the equipment in the hands.
  • The corner grinder should be taken in such a way that the cut area is not in front of the operator, but on the side. When the cutting circle is seized, the rotating cutting tool will be away.

In the video you will learn how to cut it correctly: from yourself or to yourself:

What is the danger of an angular grinding machine

Corner grinder is a traumatic tool. This is caused by the following reasons:

  • High speed of rotation of the working nozzle. It exceeds 10,000 rpm;
  • Openness (insecurity of the casing) most of the disk;
  • The possibility of breaking the abrasive disk into fragments of different sizes, which at the same time fly apart at a significant speed;
  • The frequent lack of the ability to correctly organize the workplace;
  • Formation during metal cutting (or other material) or grinding of small particles.
hold, corner, grinder, correctly

When jaming a disk that occurs even due to a slight distort of it, an angular grinder is almost impossible to hold in your hands, especially a powerful tool. This is caused by a high speed of rotation of the nozzle. Therefore, beginners are recommended to work with low-power models, component of discs with a diameter of 115-125 mm. The latter should be without the slightest defects capable of leading to their sudden destruction and tearing an angular grinder from the hands with vague consequences.

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.

Safety precautions when working with a corner grinder

The use of grinding and cutting power tools belongs to dangerous activities. Therefore, when working with a corner grinder, you need to take into account the possibility of direct or indirect action of hazardous factors:

  • Cold or heat;
  • Poor illumination of the workplace;
  • Strong noise, vibration from the machine;
  • Large physical activity;
  • Rotating parts of the equipment;
  • Falling objects (processed materials);
  • Flying sparks and solid particles of parts;
  • Work at height, depth or in a closed, inaccessible place;
  • The danger of electric trauma.

Minimize the effect of dangerous factors, and as a result, preserve life and your own health, you can observe the safety rules when operating devices with open rotating parts. To do this, you need to use personal protective equipment (abbreviated PPE), well fix the processed parts, choose a safe place, start and finish the work correctly.

Individual protection means

Under the name PPE, or personal protective equipment, means personal use products that are used to protect against pollution, prevent or reduce the action of harmful and dangerous factors. For most employees, this is workwear that corresponds to the profession. It usually includes trousers, jacket, headdress, closed shoes. Since the corner grinder is an instrument of increased danger, the clothes are complemented by other means of protection:

  • Glasses or shields;
  • Anti.Noise headphones or bers (traffic jams);
  • Vibration.Insulating mittens;
  • Respirator, especially during cutting stone, tiles, concrete or slate.
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Glasses will protect from sparks, small crumbs or a sipped disk. The use of headphones or traffic jams helps to get rid of noise, which avoids difficulties after work with hearing. Mittens will protect from abrasive and vibration. And a respirator from a large amount of dust formed.

Fixing the processed parts

All details of small and medium sizes must be reliably fixed in a vice or using a clamp. When mounting, it is necessary to provide a safe place for a possible drop in cut off parts.

Sometimes it becomes necessary to process the corner grinding of large parts or structures that cannot be fixed in a vice. It can be:

In such cases, you need to make sure that the processed surface is securely fixed (stable or lies), after processing it will not lose stability, and the cut part will not fall on the employee or others. At the slightest doubt, it should be supported by stops, jacks, or confused and securely fix the slings to the surrounding metal or reinforced concrete structures.

Safety of the workplace

Regardless of where the workplace is. In the garage, in the country or free site, it must be well lit, meet the elementary safety requirements.

Requirements for the equipment of the workplace:

  • A workbench, a table, a rack, a cabinet or a nightstand for storage, as well as the placement of devices, tools for productive safe operation should be installed.
  • All real estate equipment is securely placed (attached) on the floor.
  • The surface of the workbench and the rack must be no less than the processed parts and the tools used.
  • The surface of the workbench is made of sheet steel, aluminum, and other non.Combustible materials.
  • The vice must reliably clamp the processed parts. On the surfaces of the vice sponge there should be a cross notch with a depth of 0.5. 1 mm for each 2. 3 mm.
  • The vise is attached so that the processed parts are at the level of the elbow level.
  • On a closed grip, the gap between the lips should not be more than 0.1 mm. Handle and sponge. Without potholes and burrs.
  • The mobile part of the vice should not fall when completely twisted and move smoothly, without jerks.
  • The floor is around the workbench, as well as all the place of work should be dry and even.
  • Rosettes for power tools have above the level of the work surface of the workbench.

When working at a height (more than 1.5 m), you need to use forests (underlines) with railing 1 m, below lined with a height of 150 mm or higher.

It is not recommended to use standings, barrels, boxes randomly fallen by the arm. You can not overload the forests (grades). In any case, working with a corner grinder, you need to have an even, strong surface under your feet.

Proper start, stop and breaks

Before turning on the device, you should carefully inspect and carefully check the disk. You can not use nozzles with chips, strata, cracks or any other damage.

Before including the corner grinder on the network, you need to install a cut.Out (grinding) circle with a pattern upward, then clamp it with a special nut. Size, as well as permissible turnovers are indicated in the technical documentation for the tool.

The mismatch of the characteristics leads at least to marriage in work, premature wear of the disk, in the worst case. To injuries.

When examining the tool, you need to check that:

  • There are no damage or cracks on the case;
  • Serviceability of the cable (cord), protective tubes and forks;
  • The handle is well screwed;
  • The circle is fenced, and the casing is securely fixed.

After that, the work of the tool is verified. To do this, you need to connect the fork to the outlet, turn on the power button and the latch. Observe a minute at the work of a corner grinder. Make sure that it works without extraneous sounds, excessive vibration, and the disk does not hurt the protective casing. When disconnecting, the malfunction or performance of the power button and the latch will become clear. If everything is fine, you can start work.

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.

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.

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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.

Cut the square pipe in 45 degrees from the grinder/ square pipe 45 degree mein grinder se cutting ka

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.

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.

hold, corner, grinder, correctly

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.

Cutting a profiled sheet and metal tiles

Quite often, in practice, one has to face the need to cut a profile sheet or metal tile. These materials are made of steel, which is covered with zinc and polymer protective layers, stained.

Regarding the possibility of using a corner grinder, different opinions are expressed for their cutting. The installation instructions say that the profile cannot be sawn with the help of an angle grinding machine. To do this, use other tools. But they need to be acquired, which is not always justified by the volume of upcoming work, and also requires additional financial investments. Когда никакого инструмента, кроме угловая шлифмашина, нет, прежде чем пилить угловой шлифмашинкой, следует знать возможные негативные последствия.

  • If you cut a metal tile or corporate grinding machine, then the protective coating in the sawing area and a little near it will be destroyed, and the cut edge will begin to rust.
  • The material is removed from the warranty.
  • Spreading sparks can ruin not only the appearance of the rest of the sheet (spread the paint), but also damage the polymer coating.
  • The edge of the cut can turn out to be torn.

All considered negative consequences can be minimized if you cut the corrugated board or metal tank with a corner grinder, observing the following recommendations:

  • Do all the work immediately before installation;
  • Treat sections with anti.Corrosion compounds;
  • Cover the cut edges with a primer and stain;
  • Use the disks for the metal of the minimum thickness (up to 1 mm);
  • In order for the edges to remain neat, you need to cut quite quickly;
  • Gently polish the torn edges.

Before sawing, as usual, the sheets are marking.

If you need to cut a square, then do this:

  • Draw it on the surface of the sheet;
  • Cut the material along the marked contour of the corner grinder;
  • At the end, every corner is carefully cut out.
hold, corner, grinder, correctly

Circles or other figures cut out, working in the same scheme.

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The use of corner grinder for cutting metallic tiles and profiled sheet facilitates the work. It becomes more convenient to perform it, because you can adjust the sheets in size directly on the roof.

In order for metal maker or a professionalist to be warranty, you should measure the object and order factory cutting of sheets. You can also try to choose the material with such dimensions so that cutting is not required.

Grinder Safety | How to Properly Use an Angle Grinder

Cutting metal grinder is a cheap, almost affordable and quite effective way to saw it. In this case, the corresponding discs without defects should be used for each material. Not only the quality of the result obtained will depend on this, but also its own health. Be sure, cutting the metal, it is required to comply with the safety rules and use personal protective equipment. It should be constantly remembered that when working with an angular grinding machine, any shortcomings and inattention can turn into an injury. Therefore, you need to work with concentration and carefully.

What disk to cut metal with a corner grinder

It is equally important to buy disks for corner grinder for metal, suitable for characteristics. When choosing, take into account the diameter and thickness of the products. These parameters determine the maximum depth of the section.

For working with metal blanks, cutting circles of small thickness (1–1.2 mm) are suitable. They allow you to make even sections without applying significant efforts. For figurative processing of thin rental, circles are used for angular grinder for metal of the smallest diameter.

Photo: circles for angular grinding grounds (125 mm)

Next, choosing a device for corner grinding for cutting sheet metal, focus on the material that needs to be processed. For cast iron, steel, aluminum and brass, you need different discs. You will learn information about the purpose of a particular product from the marking on the label.

  • For stainless steel. Unlike other consumables, the discs intended for stainless steel do not damage the protective film on the metal that protects the material from corrosion.

Photo: cutting circle for corner grinders for stainless steel

  • For non.Ferrous metals. There are separate varieties for cutting cast iron, aluminum, copper, brass. The composition of circles that work with soft materials add additives against suction. Cast iron processing products, on the contrary, have solid inclusions of diamonds.

Photo: cutting circle for angular grinding in aluminum

  • For thin profile and pipes. Cut the sheet metal with a corner grinder should be used using circles suitable in diameter. Profiled sheets and tin are treated with products with small teeth. Corners and reinforcement. Discs of greater thickness.
  • Rittle. Used to clean up burrs and welds. The thickness of the circles is 5-10 mm. Processing is carried out with a tilt of the machine at an angle of 30–40 degrees to the surface.

Photo: Rittle circle for corner grind

Photo: Brush circle for metal

  • Label and abrasive. The former is used for final grinding of smooth surfaces. The second. To remove quite large protrusions and growths. High.Quality grinding involves alternating two types of circles.

Photo 0: Label circle for corner grinders

Reverse blow

The most common and dangerous moment of working with an angular grinder is the occurrence of a reverse blow, which is characterized by an instant and very sharp discharge of the tool on the operator. The power of the blow can be so great that it is simply impossible to hold the corner grinder in the hands. This is especially dangerous if the work is carried out at the level of the head. Injuries as a result of a reverse blow can be so serious that sometimes they end with fatal.

The reason for the reverse strike may be the use of a non.Working (deformed or damaged) working disk and/or its jamming in the material. Very often a reverse blow occurs in the final stage of the cut, when it remains only to finalize the last layer of the material connecting the cut parts. In this case, it is recommended not to bring the cut to the end from the same side, but to fulfill it from the other.

Safety precautions to prevent the occurrence of a reverse blow or at least minimizing its consequences for a person contains several simple rules:

  • It is unacceptable to use the equipment unaccounted for corner grinding:
  • A circle of larger diameter, since for its installation it will have to be removed by a protective casing and when used there will be an excess of linear speed of the cutting edge;
  • A saw disk completely unimportant under the speed of rotation of a corner grinder. A carbide attack flying off with a cosmic speed from his tooth can become a fatal bullet for a negligent master.
  • The operator must stable with both legs to stand on a solid and even surface. This will make it possible to resist the energy of the impact.
  • You should be as careful as possible when processing sharp edges, ribs of material and any angles. It is necessary to be prepared for a possible rejection of the corner grinding and the body shift to the side of the expected place of damage as a result of the reverse blow.
  • If the working disc is jammed, the angular grinder should be disconnected and removed from the cutting disk from the cut.

Safety precautions and understanding of the principles of working with an angular grinder guarantee the qualitative performance of the tasks without obtaining any injuries and harm to human health.

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