How To Work With A Grinder On Metal Video

How to work with a grinder correctly so that all fingers are intact? Instructions. Lessons and safety techniques will teach you how to use the grinder correctly. Tips and tricks will help you master this complex tool.

Angle grinder what is this animal?

An angle grinder (angle grinder) is exactly the name of a tool that many know as a grinder. The first models of this instrument in the USSR began to be produced in Bulgaria at the Eltos Bulgarian enterprise. The first grinders were produced only as grinders, later the angle grinders became more functional and practically irreplaceable in construction and metalworking.

The grinder outwardly looks quite simple and unpretentious: a cylindrical body, on one side of which there is a handle, and on the other side there is a side handle (optional) and a mount for nozzles. It is the nozzles that make the angle grinder such a multifunctional tool. All attachments are attached to the spindle, and the discs are always additionally fixed by means of a flange and a clamping nut. This is a mandatory measure when working with a grinder.

Modern angle grinders can cope with many tasks: grinding and polishing surfaces, cutting stone, tiles, glass, concrete, plywood, metal and brick, and if necessary, even a loaf of sausage can be cut into shape, the main thing is to choose the right attachment. It must be remembered that there is an abrasive tool for each separate type of work and work material.

Replaceable nozzles for the grinder are represented by the following assortment:

• Brushes for cleaning and polishing surfaces. You can clean metal from rust or polish welds.
• Circles The use of circles depends on their composition. Some can cut metal, others only ceramics. All this can be found in the instructions on the packaging and on the disc itself.

Not only removable nozzles are different, but also the grinders themselves. They are household, professional and industrial. A household tool can be used no more than 40 minutes and not every day. A professional grinder can work several hours every day, and an industrial real workaholic can work almost tirelessly. Differences can also be found in the appearance of the tool: grinders with one handle, with two handles and with vibration-absorbing handles.

How to work with a grinder correctly so that all fingers are intact? Safety precautions or how to work with a grinder correctly

Before starting the work process, you need to prepare the grinder: select and install the circle. The power of the angle grinder motor requires certain wheel sizes. The smaller the circle in diameter, the greater the speed of rotation it can withstand, and vice versa, the larger the disc, the fewer revolutions it can handle. Incorrect use can lead to rapid tool wear, deformation of the bits and other undesirable consequences.

Deformed tips are not suitable for use in work. It is necessary to get rid of circles with cracks, potholes and other deviations from the normal shape. After the circle is successfully fixed, the grinder is checked in idle mode. It is necessary to connect the tool to the network and run it at maximum speed for one minute. If no unnecessary vibrations and sounds are heard, and the protective cover does not touch the disc, then the tool is ready for use.

It is necessary to prepare for work and the person himself who will wield the grinder. The angle grinder has a protective casing, which is designed to protect from sparks and disc debris if it explodes. But the shroud will not provide complete protection against injury. Therefore, you should wear:

• Protective mask or goggles;
• Overalls;
• Thick gloves;
• Respirator.

You also need to remember a few prohibitions:

• Do not leave jewelry (for example, a bracelet or watch) on the body that can be wound around a circle;
• It is impossible to work, being in a state of fatigue or illness, a state of AL-Headache and drug intoxication;
• Saw blades for wood cannot be used for the grinder;
• Cannot be in the cutting plane;
• Do not let go of the tool until the rotation stops completely;
• Do not touch the equipment before it cools down after work;
• Do not leave flammable objects in the working area: rags, ropes, fuel, solvents, etc.;
• Do not forget to keep a first aid kit nearby.

Securing parts is an important aspect of how to properly work with a grinder. Everything that is cut and processed must be securely fastened. The only exceptions are elements that, by their own weight, guarantee immobility (stones, slabs, etc.). The part can be clamped in a vice or you can use the help of a partner who will hold, for example, a pipe wrench or other workpiece. A correctly laid part should not have any deflections in the kerf.

Required tools

Understanding how to work with a grinder correctly will help to perform the planned work efficiently and protect your health, and sometimes life. The grinder is a tool, when working with which safety precautions and instructions cannot be ignored.

How to properly cut with a grinder: requirements and recommendations

The grinder is on alert, the workplace is cleared of foreign things and people, the workpiece is securely attached and marked, this is exactly the moment when you can start working. The grinder must be held with both hands, firmly and confidently. It must be taken so that in the event of a wheel jamming, the tool will not be pulled out of the hands, and in the event of a reverse impact, it will not lead to a strong displacement. Kickback is one of the most dangerous moments when working with a grinder. This is a sudden and sharp rejection of it as a result of the disk jamming in the workpiece.

The position of the body during work should be stable, you should stand so that sparks do not fly to your legs, clothes, and even more so to your face. The power cord of the grinder must be out of the reach of the rotating disc so that it does not get caught. And if you need to move to another object, turn off the tool and drag the cord to a new safe position. You should also turn off the grinder if there is a power outage.

To the question: How to properly cut with a grinder, manufacturers unequivocally answer: So that the direction of rotation of the disc and the movement of the tool itself coincide. In this case, a jet of sparks will close the markings along which the cut is made, so this rule of operation is often ignored, but in vain. It is necessary to bring the disc into contact with the surface at full spindle revolutions so that the wheel does not jam.

Rules for cutting with a grinder:

• It is necessary that the line of the cut passes by the working person, and does not rest against him. And in the event of a jammed disc, the reactive movement of the tool will pass away from the operator.
• The safety guard will provide protection if it is between the circle and the worker.
• It is not necessary to press hard on the tool. The grinder will cope with the task under its own weight, and overloading will only lead to a skewed circle.
• You cannot turn on the grinder if the disc is located in the cut of the workpiece.
• Cutting profiles must be started from the place with the smallest cross-section.
• When cutting stone, concrete or tiles, a lot of dust is generated, which must be protected from the respiratory system and must be disposed of. There are special covers with a nozzle for a vacuum cleaner. You can also suppress dust with water by directing a jet of water into the cut.
• When cutting walls, you must be prepared for the fact that a cable, pipe, fittings can get under the circle, which can lead to a kickback and therefore it is better to stay away from the possible mowing line of the tool displacement.

How to choose the right discs

There are symbols on the circle that will help you choose the right circle.

When choosing discs, you need to know what they will be used for, pay attention to their diameter and thickness. These are the main parameters of the disks.

The smallest diameter is 125 mm, and the maximum, from the public, is 250 millimeters. In professional grinders, discs can be larger in diameter.

The thickness of the cut part and the maximum depth of cut depend on the diameter of the disc.

If you plan to cut only metal, you need to purchase a cutting disc. It has the smallest thickness from 1 to 1.2 mm, for industrial grinders up to 2.5 mm. This will facilitate the physical exertion of the grinder and the worker. The cut is neat.

If you plan a curly thread on thin metal, then it is done with a disc of the smallest diameter or an old, almost worn out disc.

Many people think that a diamond blade should be used to cut metal. This is a completely wrong opinion. The diamond disc will simply get stuck in the metal and will be unusable for further work.

Experts say that even beginners do not have any particular difficulties when cutting metal with a grinder.

Basic rules for safe work when cutting metal with a grinder

The layout of the most dangerous sectors when working with a grinder, taking into account the rebound and destruction of the disc.

The most necessary condition for cutting is strict adherence to the rules of safe work.

Grinder manufacturers are constantly trying to minimize the risks of injury and injury by inventing and improving various protection systems. But no one cares about the worker like himself.

The main dangers that arise when cutting metal are the flight of fragments of a broken disc, the flow of sparks and the smallest abrasive particles, the inability to hold the tool in your hands.

If the disc breaks or it gets jammed, the grinder can break out of the hands at the most inopportune moment and with great force, therefore, even before starting work, the direction of its possible movement should be foreseen.

Safety rules cannot be neglected even when performing small work.

Before starting work, you should:

1. Protect face, eyes, hands and, if possible, all body parts.
2. Remove all combustible materials and objects that are in the direction of the discharge of sparks.
3. Fasten the part to be processed by the grinder, if possible, in a vice. Do not hold the workpiece with your free hand or press with your feet.
4. If a new disc is installed, you need to turn it with a grinder at maximum speed, placing it further away: the disc may be defective and fly to pieces.
5. Install, adjust and secure the protective cover.

It is best to protect your face with a special shield when working with a grinder.

During work, you should:

1. When replacing discs during rest, you must disconnect the grinder from the network.
2. To protect eyes and face, use goggles or a face shield. Professionals use both of them during extended work.
3. Hold the grinder firmly during all work.
4. To replace the drive, you need to wait until it stops completely.
5. Wear protective gloves. It is undesirable to use cotton gloves, they do not provide sufficient protection, they can ignite, and the threads wind up on the grinder’s spindle or disc.
6. During work, you need to position yourself so that the face, and, if possible, all parts of the body are not in the plane of rotation of the disk.

At the end of the work, you should:

• Wait until the rotation of the disc has stopped completely and only then put the tool on the floor with the disc facing up so as not to damage it;
• Disconnect the grinder from the network;
• Make sure there is no smoke or other signs of fire.

A typical mistake that is made when cutting metal: if the diameter of the new circle is greater than the size of the protective cover, it is removed. The cover is a protection in case the disc breaks and shatters during the metal cutting process.

Instead of a disc, many put cutters, saws or other materials at hand. Doing this is strictly prohibited.

How to choose the right grinder

The grinder should fit comfortably in your hand.

The correct choice and quality of the grinder itself determines the quality of work and the safety of the worker.

When choosing a machine, one should be guided by its main parameters: power and diameter of the cutting abrasive wheel. Its weight is also important, since it is often necessary to work by weight, and its dimensions so that it is possible to perform work in inconvenient and hard-to-reach places.

Most buyers, when they see powerful grinders, are somewhat frightened that it is more difficult to cope with it than with a low-power one. This is a misconception. Low-power grinders are more likely to jam discs, i.E. They are physically unable to pull out the disk under heavy loads. The situation how the disk and the machine itself will behave after reducing the load is unpredictable. Most likely, the grinder will be torn from the hands. The consequence of this will be a break in the disc, damage to the machine and injury to the cutter. Therefore, it is better for novice craftsmen to purchase a grinder for a 125 mm disc with a power of 800-1000 W and a spindle speed of 10,000 rpm. This power is sufficient for cutting iron.

For cutting metal, there are machines for a 115 mm disc powered by batteries, but, as practice shows, with their high cost in solving everyday problems, they do not justify themselves.

The handles of the grinder should be rubber or made of material that will dampen vibrations from the machine.

But none of the technical characteristics reflect the convenience and safety in work. The grinder should lie comfortably and securely in your hand so that when working with metal you focus on it, and not on how to hold the tool in your hands. It is desirable that the grips are rubber or vibration-damping material with finger recesses.

Low-powered grinders, as a rule, do not have an additional handle.

If, when choosing, any inconvenience was found, you should look for a grinder of another model.

How to properly cut metal with a grinder. Practical tips and advice

If long pipes rest on supports, the overhanging edge should be cut. If you cut them in the middle, then due to its own weight, the metal will bend and clamp the disc.

If you do not have the skills to handle the grinder, then before starting work, you should learn how to cut on unnecessary parts.

The cut-off wheel only accepts radial forces. Attempting to change the cutting plane while the blade is inside a metal piece will break it.

The disc heel (the near lower part of the circle) cuts metal more effectively.

In order for the grinder and discs to serve for a long time, every 5-7 minutes of work you need to take a break for 20-30 minutes. This rule is especially important for low-power grinders who are afraid of overheating.

To increase the service life of discs, especially expensive ones, and to cool the metal, the place of the cut should be watered. It is advisable to carry out the work together.

Aluminum is a very tough metal. When cutting a piece of large thickness, kerosene must be dripped into the seam, observing fire safety rules.

For molding, cutting of sheet metal, curly carving, you should use worn-out stub discs, so do not throw them away immediately.

The corner should be cut correctly not in one go, but separately both shelves.

If long enough pipes, corners, fittings lie on supports, cut the overhanging edge correctly. If you cut between the supports, the part will bend due to its own weight and jam the disc.

Thick parts are cut only in a straight line. If you need to cut out a curly part, straight-line cuts are first made, then the remaining unnecessary parts are removed.

You should not put pressure on the grinder. This will lead to jamming or breakage of the disc and overheating of the grinder. If the cutting process is slow, the blade should be replaced.

The resulting cut should not be processed with the side of the disc. For this, a different type of disc is used.

Melted particles of metal and abrasive, falling on plastic products, glass and car headlights, get stuck in them, and then it is almost impossible to remove them. Therefore, before starting work, they must be removed or protected.

How to cut metal with a grinder

There is an opinion that the very concept of a grinder has come into our use because this instrument was first brought from Bulgaria. This is partly true. But they developed and began to produce it in Germany. He first came to us from Bulgaria, where he began to be released in the seventies. The angle grinder is the correct tool name.

When working with a grinder, it is imperative to observe safety precautions, namely: wear glasses, gloves, a helmet and a protective apron.

The resulting sections can be grinded, polished, sharpened. A large selection of interchangeable attachments makes this tool irreplaceable and versatile.

At the same time, it is the most traumatic tool.

To cut metal with a grinder you will need:

• Mask;
• Glasses;
• Disks;
• Bulgarian;
• Metal.

Can a grinder be used for cutting metal tiles and corrugated board?

At a time when they just started to use metal tiles and corrugated board, the instructions said that it is strictly forbidden to use a grinder to cut these roofing materials. This is explained by the fact that on both sides they are protected with zinc and polymer coatings and painted.

The abrasive disc heats and melts the material. The sections are torn. Flying sparks also break the paint. All this causes corrosion of the material and a decrease in the service life.

Nevertheless, builders have recently begun to use a grinder for this work. This greatly facilitates the work, it can be carried out directly on the roof. After cutting, the edges must be treated with anti-corrosion agents, primed and painted.

Correctly cutting metal with a grinder is not difficult. Everything can be learned. The main thing is to follow the safety rules and follow the recommendations.

How to choose the right grinder

The grinder should fit comfortably in your hand.

The correct choice and quality of the grinder itself determines the quality of work and the safety of the worker.

When choosing a machine, one should be guided by its main parameters: power and diameter of the cutting abrasive wheel. Its weight is also important, since it is often necessary to work by weight, and its dimensions so that it is possible to perform work in inconvenient and hard-to-reach places.

Most buyers, when they see powerful grinders, are somewhat frightened that it is more difficult to cope with it than with a low-power one. This is a misconception. Low-power grinders are more likely to jam discs, i.E. They are physically unable to pull out the disk under heavy loads. The situation how the disk and the machine itself will behave after reducing the load is unpredictable. Most likely, the grinder will be torn from the hands. The consequence of this will be a break in the disc, damage to the machine and injury to the cutter. Therefore, it is better for novice craftsmen to purchase a grinder for a 125 mm disc with a power of 800-1000 W and a spindle speed of 10,000 rpm. This power is sufficient for cutting iron.

For cutting metal, there are machines for a 115 mm disc powered by batteries, but, as practice shows, with their high cost in solving everyday problems, they do not justify themselves.

The handles of the grinder should be rubber or made of material that will dampen vibrations from the machine.

But none of the technical characteristics reflect the convenience and safety in work. The grinder should lie comfortably and securely in your hand so that when working with metal you focus on it, and not on how to hold the tool in your hands. It is desirable that the grips are rubber or vibration-damping material with finger recesses.

Low-powered grinders, as a rule, do not have an additional handle.

If, when choosing, any inconvenience was found, you should look for a grinder of another model.

How to choose the right discs

There are symbols on the circle that will help you choose the right circle.

When choosing discs, you need to know what they will be used for, pay attention to their diameter and thickness. These are the main parameters of the disks.

The smallest diameter is 125 mm, and the maximum, from the public, is 250 millimeters. In professional grinders, discs can be larger in diameter.

The thickness of the cut part and the maximum depth of cut depend on the diameter of the disc.

If you plan to cut only metal, you need to purchase a cutting disc. It has the smallest thickness from 1 to 1.2 mm, for industrial grinders up to 2.5 mm. This will facilitate the physical exertion of the grinder and the worker. The cut is neat.

If you plan a curly thread on thin metal, then it is done with a disc of the smallest diameter or an old, almost worn out disc.

Many people think that a diamond blade should be used to cut metal. This is a completely wrong opinion. The diamond disc will simply get stuck in the metal and will be unusable for further work.

Experts say that even beginners do not have any particular difficulties when cutting metal with a grinder.

How to cut metal with a grinder

There is an opinion that the very concept of a grinder has come into our use because this instrument was first brought from Bulgaria. This is partly true. But they developed and began to produce it in Germany. He first came to us from Bulgaria, where he began to be released in the seventies. The angle grinder is the correct tool name.

When working with a grinder, it is imperative to observe safety precautions, namely: wear glasses, gloves, a helmet and a protective apron.

The resulting sections can be grinded, polished, sharpened. A large selection of interchangeable attachments makes this tool irreplaceable and versatile.

At the same time, it is the most traumatic tool.

To cut metal with a grinder you will need:

• Mask;
• Glasses;
• Disks;
• Bulgarian;
• Metal.

Basic rules for safe work when cutting metal with a grinder

The layout of the most dangerous sectors when working with a grinder, taking into account the rebound and destruction of the disc.

The most necessary condition for cutting is strict adherence to the rules of safe work.

Grinder manufacturers are constantly trying to minimize the risks of injury and injury by inventing and improving various protection systems. But no one cares about the worker like himself.

The main dangers that arise when cutting metal are the flight of fragments of a broken disc, the flow of sparks and the smallest abrasive particles, the inability to hold the tool in your hands.

If the disc breaks or it gets jammed, the grinder can break out of the hands at the most inopportune moment and with great force, therefore, even before starting work, the direction of its possible movement should be foreseen.

Safety rules cannot be neglected even when performing small work.

Before starting work, you should:

1. Protect face, eyes, hands and, if possible, all body parts.
2. Remove all combustible materials and objects that are in the direction of the discharge of sparks.
3. Fasten the part to be processed by the grinder, if possible, in a vice. Do not hold the workpiece with your free hand or press with your feet.
4. If a new disc is installed, you need to turn it with a grinder at maximum speed, placing it further away: the disc may be defective and fly to pieces.
5. Install, adjust and secure the protective cover.

It is best to protect your face with a special shield when working with a grinder.

During work, you should:

1. When replacing discs during rest, you must disconnect the grinder from the network.
2. To protect eyes and face, use goggles or a face shield. Professionals use both of them during extended work.
3. Hold the grinder firmly during all work.
4. To replace the drive, you need to wait until it stops completely.
5. Wear protective gloves. It is undesirable to use cotton gloves, they do not provide sufficient protection, they can ignite, and the threads wind up on the grinder’s spindle or disc.
6. During work, you need to position yourself so that the face, and, if possible, all parts of the body are not in the plane of rotation of the disk.

At the end of the work, you should:

• Wait until the rotation of the disc has stopped completely and only then put the tool on the floor with the disc facing up so as not to damage it;
• Disconnect the grinder from the network;
• Make sure there is no smoke or other signs of fire.

A typical mistake that is made when cutting metal: if the diameter of the new circle is greater than the size of the protective cover, it is removed. The cover is a protection in case the disc breaks and shatters during the metal cutting process.

Instead of a disc, many put cutters, saws or other materials at hand. Doing this is strictly prohibited.

How to properly cut metal with a grinder. Practical tips and advice

If long pipes rest on supports, the overhanging edge should be cut. If you cut them in the middle, then due to its own weight, the metal will bend and clamp the disc.

If you do not have the skills to handle the grinder, then before starting work, you should learn how to cut on unnecessary parts.

The cut-off wheel only accepts radial forces. Attempting to change the cutting plane while the blade is inside a metal piece will break it.

The disc heel (the near lower part of the circle) cuts metal more effectively.

In order for the grinder and discs to serve for a long time, every 5-7 minutes of work you need to take a break for 20-30 minutes. This rule is especially important for low-power grinders who are afraid of overheating.

To increase the service life of discs, especially expensive ones, and to cool the metal, the place of the cut should be watered. It is advisable to carry out the work together.

Aluminum is a very tough metal. When cutting a piece of large thickness, kerosene must be dripped into the seam, observing fire safety rules.

For molding, cutting of sheet metal, curly carving, you should use worn-out stub discs, so do not throw them away immediately.

The corner should be cut correctly not in one go, but separately both shelves.

If long enough pipes, corners, fittings lie on supports, cut the overhanging edge correctly. If you cut between the supports, the part will bend due to its own weight and jam the disc.

Thick parts are cut only in a straight line. If you need to cut out a curly part, straight-line cuts are first made, then the remaining unnecessary parts are removed.

You should not put pressure on the grinder. This will lead to jamming or breakage of the disc and overheating of the grinder. If the cutting process is slow, the blade should be replaced.

The resulting cut should not be processed with the side of the disc. For this, a different type of disc is used.

Melted particles of metal and abrasive, falling on plastic products, glass and car headlights, get stuck in them, and then it is almost impossible to remove them. Therefore, before starting work, they must be removed or protected.

Can a grinder be used for cutting metal tiles and corrugated board?

At a time when they just started to use metal tiles and corrugated board, the instructions said that it is strictly forbidden to use a grinder to cut these roofing materials. This is explained by the fact that on both sides they are protected with zinc and polymer coatings and painted.

The abrasive disc heats and melts the material. The sections are torn. Flying sparks also break the paint. All this causes corrosion of the material and a decrease in the service life.

Nevertheless, builders have recently begun to use a grinder for this work. This greatly facilitates the work, it can be carried out directly on the roof. After cutting, the edges must be treated with anti-corrosion agents, primed and painted.

Correctly cutting metal with a grinder is not difficult. Everything can be learned. The main thing is to follow the safety rules and follow the recommendations.