How to cut metal with a grinder. Safe place of work

How to cut a pipe grinder correctly

Metal is the material for which the angular grinding machine was originally designed (Ushm). Now, with its help, reinforcing rods, various metal sheets, pipes of various diameters, brick, concrete, stone, tiles and other building materials are cut. Due to the presence of a variety of nozzles of the Bulgarian, it also allows you to polish and grind the surfaces of products. Metal cutting with a grinder is one of the main, most common work. To reduce the likelihood of injury, it must necessarily be performed correctly, with strict compliance with the requirements of general and personal safety precautions.

Bulgarian belongs to the category regarding dangerous power tools. You can get an injury from a scattering disk or a tool fell out of the hands. In both cases, the danger is associated with a high speed of rotation of the device electric motor.

To increase the efficiency of the work of the grinder, expand its functionality, in practice they use such Additional devices:

Their use allows you to improve the quality of sawing of metal blanks, increase the accuracy of the process. The working conditions from the standpoint of security are also improving, its performance increases.

To protect the cutting process as much as possible, work on metal with an angular grinding machine should be in compliance with a number of rules. They are conditionally divided into preparatory and main (workers) events.

Before cutting, it is necessary to carry out a number of manipulations.

• Put on a special one Workworm and shoes (with anti.Slip sole), gloves made of dense fabric or leather.
• Prepare, based on the features and type of sawed metal, a suitable disk, and then install it with a marking to the top, holding it with a nut.
• Check the work nozzles used for various defects that violate their integrity: potholes, cracks and other deformations.
• Take advantage personal protective equipment: glasses, respirator or mask (shield), and in some cases also headphones.
• Check the performance of the tool, reliability of fixing its casing (it is strictly prohibited to work), the condition of the supply cord with a fork.
• Prepare the workplace: remove combustible materials (grease, fuel, paper, rags) and all interfering things. Cover or push it to safe distance objects that may be damaged by hot metal particles.

If possible, the sawed material should first be fixed reliably, for example, in a vice to remove possible random movements. Hold the processed parts in the hands or is prohibited between the knees.

How to cut it correctly with a grinder: on yourself or from yourself

There are angle grinders in many farms and garages, but most owners do not know how to hold and use a grinder correctly.

Therefore, they make mistakes that can lead to marriage in work, which is even worse. To severe injuries. It must be remembered that the Bulgarian is a very dangerous tool.

Therefore, before using it, you need to find out several safety rules.

How to cut it correctly

First of all, you need to take the tool correctly in your hands. Helpers hold the grinder with their right hand by the case. In this case, the circle is located on the left, and the gearbox on the right side of the machine.

With the left hand you need to hold the tool for the handle injected into the body. Right position of the handle. Up. The protective casing should close the disk and hands, casting sparks from the employee.

For the left, the hilt is screwed on the other side of the case, the protective casing is turning and fixed in the right position.

Tool manufacturers give three main advice on working with a grinder: hold your hands tightly, do not be on the cut line, stop and not run the machine if the disk is jammed.

How and in which direction everyone decides to cut himself, given the fact that when biting, the grinder throws in different directions.

Cut from yourself

This is a very good way, but it is important to observe one condition. Cut from yourself, sparks under the feet. In this case, when biting the disk, the grinder throws a grinder, so it is not able to harm health. In this case, the drawn line of the cutting line is clearly visible, and the probability of doing something wrong is very small. The disadvantage of this method. Sparks fly into trousers and under the feet.

Cut on yourself

There are many supporters of this method. It is only important not to forget that when the grinder is led, the sparks must fly in the other direction. This minimizes the risk of biting disk. Although he always remains. Therefore, when moving the tool, you must definitely leave the cutting line.

Safety precautions when working with a grinder

The use of grinding and cutting power tools belongs to dangerous activities. Therefore, when working with a 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 Bulgarian 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.

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 there is a need to process large details or structures with a grinder 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.

Basic safety rules for working with metal

How to cut metal correctly? The basic rules of this process:

• A specialist should arm yourself with protective glasses when working with Ushm, take shields, in order to avoid sparks, small particles of metal.
• It is advisable to protect all parts of the body. It is necessary to put on protective mittens on your hands, not cotton, they easily ignite.
• For cutting metal, a grinder must be removed nearby objects, especially rapidly flammable.
• Must be a processing part should be fixed in the machine or vise. Do not hold her hand, do not pinch her legs.
• When installing a new disk, scroll it at maximum speed, you need to keep the grinder away from yourself.

Do not put mills, saws instead of a disk, this is strictly prohibited. It is necessary to comply with safety rules and minimize the possibility of injuries.

How to cut a grinder correctly

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

When working with a grinder, you must follow safety precautions, namely: wear glasses, gloves, a helmet and a protective apron.

It is impossible today to imagine the work of builders, repairmen, mechanics, locksmiths without a grinder. With its help, you can cut a variety of materials, including metal: reinforcement, bar, water pipes, corner, profile.

The slices received can be polished, polished, sharpened. A large selection of replaceable nozzles makes this tool indispensable and universal.

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

For cutting metal, a grinder will be needed:

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

When choosing a machine, you should FOCUS on its main parameters: power and diameter of the cutting abrasive circle. Its weight is also of considerable importance, since it is often necessary to work “by weight”, and sizes so that you can do work in uncomfortable and inaccessible places.

Most buyers at the sight of powerful Bulgarians are somewhat frightened that it is more difficult to cope with it than with a low.Power. This is an erroneous opinion. In small.Power Bulgarians, discs are more likely to jam, t.E. They physically cannot “pull out” the disk with large loads. The situation, how the disk itself will behave and the machine itself after reducing the load is unpredictable. Most likely the Bulgarian will be torn from hands. The consequence of this will be the break of the disk, damage to the machine and injuries of the cutter. Therefore, it is better for beginner craftsmen to purchase a grinder under a 125 mm disk with a capacity of 800-1000 W and the number of spindle revolutions 10,000 about./min. Such power is enough for the cut of iron.

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

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

But no technical characteristics reflect convenience and safety in work. The grinder should be conveniently and reliably lying in the hand, so that when working with metal, FOCUS on it, and not on how to hold the tool in your hands. It is desirable that the handles are rubber or made of material that extinguishing vibration, with recesses for the fingers.

Low.Power Bulgarians, as a rule, do not have an additional handle.

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

There are designations in the circle that will help you choose the right circle.

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

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

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

If it is planned to cut only metal, you need to purchase a detachment disk. It has the smallest thickness from 1 to 1.2 mm, for industrial Bulgarians. Up to 2.5 mm. This will facilitate physical activity on a grinder and a working. The cut is neat.

If a figured thread on thin metal is planned, then it is made by the disk of the smallest diameter or an old, almost worked out disk.

Many people believe that for cutting metal you need to use a diamond disk. This is a completely wrong opinion. The diamond disk in the metal will simply get bogged down and will be unsuitable for further work.

Experts say that even beginners do not arise special difficulties in cutting metal with a grinder.

Basic rules for safe operation when cutting metal by grinder

The location of the most dangerous sectors during the operation of the grinder, taking into account the rebound and destruction of the disk.

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

Bulgarian manufacturers are constantly trying to minimize the risks of injuries and injuries, inventing and improving various protection systems. But no one will take care of the employee, as he himself.

The main dangers that arise during metal cutting are departure of fragments of a broken disk, a stream of sparks and the smallest abrasive particles, the inability to keep the tool in the hands.

If the disk breaks or jams it, the Bulgarian can break out of the hands at the most inopportune moment and with great force, therefore, even before the start of work, the direction of its possible movement should be provided.

Safety rules cannot be neglected even when performing small work.

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

• Wait for a complete stop of the disk rotation and only then put the tool on the floor with a disk up so as not to damage it;
• Turn off the grinder from the network;
• Make sure that there is no smoke or other signs of fire.

A typical error that is made during metal cutting: if the diameter of a new circle is larger than the size of the protective casing, it is removed. The casing is a protection in case the disk is broken and scattered into parts during the cutting of the metal.

Instead of a disk, many put mills, saws or other improvised materials. Do it strictly forbidden.

How to cut metal with a grinder correctly. Practical advice and recommendations

How to cut metal with a grinder, so as not to get an injury

So you can’t cut it

Look at the photo and remember, you can’t cut it!

The first rule, in no case do not work without a defender, because if the disk is spaced, then the defender will take most of the fragments.

I am sure that many will want to say that not every time it is convenient to get to a cut point with a fastened defender, or that the defender covers the review.

In 95% of cases, these are just excuses for people who are too lazy to put on a defender on a grinder, or it’s just uncomfortable to work with a fastened defender.

Perhaps once or twice will have to pray to all the famous gods, unfasten the defender, and cut off something, but this is an exception to the rule. We just take it as an axiom, the defender and the Bulgarian is a single whole.The second no less compulsory attribute is a pen.

When working, we have two possible options for the development of events that can lead to injury (I am silent about the fatal outcome, although here and here Visitors told a lot of such cases):

• During work, a saw disk is scattered. In this case, there is a chance that we will injure us with fragments.
• The saw disk was clamped and the instrument torn from the hands. We can hit us with an instrument, or hook with a spinning disk.

The pen is needed in order to reduce the probability that the tool will tear out of our hands, because with both hands we will definitely hold the tool stronger. Over, it will not be possible to confidently hold the tool with one hand, and it will vibrate, and this already increases the clamping of a saw disk.

Which way should sparks fly from the grinder?

I have already touched this topic once in the publication, “In which direction should sparks fly from the grinder: on themselves or from yourself?”And as a result of more than 750 Комментарии и мнения владельцев. Let’s take a look at the tool carefully. The grinder switch is made in such a way that it could be pressed with a thumb.

If you take the tool, in this way, as the manufacturer provided, it will automatically turn out that the sparks should fly to the operator, and not from it. In this case, if the detachment closes, the Bulgarian will fly from you, not on you.

Of course, when the spark is scattered, the operator will fly towards the operator, but if you have a defender, but you are not standing in the flight of sparks and fragments, then in principle sparks are not afraid of sparks.

Correct position when working with a grinder

As you can see in the photo, the defender is fastened to the grinder, the handle is screwed, the operator holds the grinder with both hands, the sparks fly towards the operator, but the operator stands a little away from the flight of sparks and possible disk fragments.

What to do if there is no way to let sparks on yourself?

Of course, not every time we use a grinder in perfect conditions, and there may be a situation when sparks fly from the operator. Here the answer is simple, you should use the most thin cuts (although when you cut the metal, I advise you to do this in any situation). The thinner the disk, the more likely it is that with its clamp it will crumble, and the tool will remain in your hands.

For comparison, thick and thin cuts

Incorrect arrangement of the material

A couple of times I had to see how the reinforcement was cut in this way at a construction site. Builders are generally a separate caste, sometimes it seems to me that many of them are preserved before starting work.

At least, I can’t explain the attitude towards TB in any other way.

Unfortunately, at that time it was not possible to take a photo, so instead of drawing a scheme, I decided to simulate the situation and clearly show it to you:

In principle, the standard situation, you need to cut off a piece of reinforcement. It is extremely inconvenient to do when it lies on the ground.

As the reinforcement occurs, under its severity it bends down, and the already cut edges begin to put pressure on the cutting disk.

If the material is hanged with one edge, then as the edges cut off, they will not be compressed, but it diverges and there will be no risk of pushing the disk.

And a little TB

Try to protect your eyes and ears when working with a grinder. If you have a familiar optometrist, ask him how many times he had to get metal chips from his eyes, I am sure you will be surprised at this figure. And if you do not use glasses, then sooner or later you will also make an appointment with the optometrist.

Take care of yourself and work slowly, thinking about your actions.

If you were interested and useful for an article, then be sure, we just definitely like and subscribe. Do not forget about channel, Everything is interesting there too. All sentences, wishes and criticism send to Badart@yandex.Ru or in a commentary under the publication!

Safety precautions when working with a grinder

The use of grinding and cutting power tools belongs to dangerous activities. Therefore, when working with a 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.

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.

What nozzles are recommended for working with wood

The nozzles recommended by specialists were already listed for the grinder, but we give their list again:

• Chain cutter or saw. The nozzle is equipped with a device for turning the cutting tool, which allows you to prevent the clamp and jerk of the tool;
• The novelty from the developers of the tool. Chain saw. Recommended diameter. Up to 230 mm;
• Ordinary wood disk. The diameter, size of the disk and the number of teeth are selected depending on the task.

In addition to sawing and cutting, the tree can be grinded and cleaned. For this, sandpaper and grinding disks are produced.

How to cut it correctly

First of all, you need to take the tool correctly in your hands. Helpers hold the grinder with their right hand by the case. In this case, the circle is located on the left, and the gearbox on the right side of the machine. With the left hand you need to hold the tool for the handle injected into the body. Right position of the handle. Up. The protective casing should close the disk and hands, casting sparks from the employee. For the left, the hilt is screwed on the other side of the case, the protective casing is turning and fixed in the right position.

How and in which direction everyone decides to cut himself, given the fact that when biting, the grinder throws in different directions.

Cut from yourself

This is a very good way, but it is important to observe one condition. Cut from yourself, sparks under the feet. In this case, when biting the disk, the grinder throws a grinder, so it is not able to harm health. In this case, the drawn line of the cutting line is clearly visible, and the probability of doing something wrong is very small. The disadvantage of this method. Sparks fly into trousers and under the feet.

Cut on yourself

There are many supporters of this method. It is only important not to forget that when the grinder is led, the sparks must fly in the other direction. This minimizes the risk of biting disk. Although he always remains. Therefore, when moving the tool, you must definitely leave the cutting line.

Correct cut

Before starting cutting the product, you need to understand which side it is better to do. If you have access from all sides, then this is very good, and the probability of a mistake is reduced.

Be sure to keep in mind which way the disk is spinning. So, when the sparks fly from you, then do not make a “fork”, when cutting a channel or a metal profile. The photo clearly shows what I mean. So you can’t cut a grinder!

At the beginning of metal cutting, the grinder should be placed so that the cutting part is slightly raised. You need to keep the Ushm confidently, but at the beginning of the cutting of the metal, you should not put pressure on the product.

Try to keep the device exactly. So you will get not only an even section, but also reduce the likelihood of a disc clamp.

The most important thing is to take into account the basics of physics. The cut.Off element should go to the side, not clamp the disk. It is best to create such conditions that it is on weight. To do this, put something under the product. An example in the photo.

How to cut it with a grinder, sparks from yourself or yourself?

In this issue, I would like to discuss with you one question of how to work with a grinder and what is not recommended to do when working with this tool.

Many people argue about how the disk should rotate on the Ushm, from yourself or to yourself?

Just the other day, I saw how the detachment disc was scattered into small pieces and it would not be at all as a disk, but in a rude violation of the rules of cutting.

A person cut leaf material with a thickness of about 1 mm., Disc rotation was from myself.

And the mistake was that it was necessary to cut in this position on yourself, that is, pull the grinder to yourself, and not from yourself.

As a result, the disk fell on the sharp edge and it was torn into small parts.

The most important thing is that no one was injured is very lucky. It would seem clear, but not everyone knows about it. If the metal were much thicker, then perhaps this would not have happened.

A little about protection and safety when working with Ushm.

I don’t know why, some people remove the tool protection, I never do this.

It is installed in me in this position:

Even if the hand accidentally slides, you will not be able to reach the abrasive circle:

So, I work with a grinder only sparks on myself, along the Ushm building, it’s much more convenient for me more and more logical.

How to work as a grinder

High.Quality work and maintenance of health in the vast majority of cases of working with a grinder depend from understanding its device and the right methods of work. Corner grinding machine, in the common people. A grinder. This A tool that does not tolerate a negligent attitude to safety rules. This article will be covered in detail by all the nuances and techniques of work by a grinder, as well as safety standards that require strict observance.

• Why do you need an angle grinding machine, how to use, instructions for dummies
• Cutting, metal work and not only
• How to saw from yourself or yourself
• Grinding
• Polishing
• Labbation
• Safety precautions
• Using personal protective equipment
• Place of work
• Fixing the processed parts
• Operation of good tools, primary launch, breaks, where sparks should fly
• Popular questions
• Accidents
• Then and repair of safe Ushm
• Video
• Device, the principle of operation and the possibility of applying
• Varieties
• Popular models of corner grinding machines
• Types of nozzles
• Where can I buy

Determination of the type of concrete

There are various types of concrete that differ in their technical characteristics. For each you should select a certain type of work nozzle, which will most effectively perform concrete cutting.

• “Old” concrete differs from “young” increased strength characteristics. In some types of fresh concrete, chemical reactions continue over time, which lead to a change in the structure with the formation of hydrated compounds, which are the very reason for increasing the strength. Cut such “old” concrete should nozzles with increased technical characteristics, When processing “young” concrete, you can use simpler tool options.
• Concrete is often performed with a reinforced frame from reinforcement. Therefore, there is a chance when cutting such concrete to encounter a metal material. For cutting reinforced concrete should be used Diamond discs of a special design.
• To choose a nozzle for cutting concrete The type of filler material and its size affect. So, for example, the presence of quartz and basalt greatly strengthens the structure of concrete, add abrasive abrasive properties to it. It is important here to increase the operating life of the nozzle to ensure a combination of diamond spraying with a relatively “non.Rigid” ligament in the form of silver solder. The large fractional composition of the filler affects the speed of cutting. The large impurities contains concrete, the less the speed of cutting will be.

The choice of nozzle

Ushm nozzle is a detachment disc. It can have two different parameters: thickness and diameter. The first parameter is in the range from 0.8 to 3 mm.

The discs themselves are distinguished by external spraying:

• Abrasive. The most common detachment circles. They are divided into cutting disks: ferrous metals, stainless steel, aluminum, non.Ferrous metals. It is better to clarify the type of disk from the seller in advance so as not to overpay or buy the wrong consumption.

Diamond disk Extra Max (230×22.2 mm.) in concrete is not suitable for cutting metal. Photos all tools.RU

• Diamond. Dear and very high.Quality detachment circles. Such a consumable can work for any type of metal. The diamond disk quickly cuts and less sparkles. Its main minus is high price. It costs an order of magnitude more expensive than an abrasive disk. Diamond cutting circles are divided into: continuous, segment and turbo disks.

When buying a disk, you need to take into account not only spraying, but also the diameter of the detachment circle.

Important! Some builders take a cutting circle for concrete to work with metal. It costs cheaper than a metal consumable. In fact, the concrete disk is growing faster and more sparkles. Savings disappears when working in a long.

Which disk is better in thickness in which case

Ushm (Bulgarian) Makita GA6040C with disk and key. Photo 220 volts

Cutting circles are divided in diameter. The minimum disk size starts from a size of 115 mm and reaches a mark of 230 mm. Each consumable is selected based on the construction tasks to be solved:

• 115 mm cutting of nails, screws, sheet metal with a thickness of not more than 30 mm;
• 125 mm one of the most common disks for cutting metal, thin pipes, body and other steel with a thickness of not more than 40 mm;
• 150 mm It will be required when dismantling watering trunk pipes, sawing thin reinforcement;
• 180 mm cutting of thick steel, metal profiles and corners, reinforcement from 40 to 60 mm, can be used for cuts of the walls with internal reinforcement;
• 230 mm The largest disk is used to cut the channels, thick reinforcement, large pipes, rails.

Original disks from the manufacturer are often cut better than cheap consumables. The branded cutting circle will not have to be changed often, with it you will get a neat and thin cut.

Attention! Buy cutting circles that are probably suitable for your Ushm model. Look in advance this parameter in the user guide.

Basic rules for safe operation when cutting metal by grinder

The location of the most dangerous sectors during the operation of the grinder, taking into account the rebound and destruction of the disk.

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

Bulgarian manufacturers are constantly trying to minimize the risks of injuries and injuries, inventing and improving various protection systems. But no one will take care of the employee, as he himself.

The main dangers that arise during metal cutting are the departure of fragments of a broken disk, a stream of sparks and the smallest abrasive particles, the inability to keep the tool in their hands.

If the disk breaks or jams it, the Bulgarian can break out of the hands at the most inopportune moment and with great force, therefore, even before the start of work, the direction of its possible movement should be provided.

Safety rules cannot be neglected even when performing small work.

• Protect your face, eyes, hands, if possible and all parts of the body.
• Remove all combustible materials and items that are in the direction of the departure of sparks.
• Fix the part processed by a grinder if possible in a vice. It is forbidden to hold the processed product with a free hand or press with your feet.
• If a new disk is installed, you need to “scroll” it with a grinder at maximum speed, placing it away: the disk may be defective and fly to pieces.
• Install, adjust and fix the protective casing.

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

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• When replacing the disks during rest, you need to turn off the grinder from the network.
• To protect the eyes and faces, use glasses or a protective shield. Professionals use both during long.Term work.
• Hold the grinder tightly during all the work.
• To replace the disk, you need to wait until it stops.
• Work in protective mittens. It is undesirable to use cotton mittens, they do not provide sufficient protection, can be ignited, and the threads are wrapped on a grinder spindle or disk.
• During operation, you need to be located so that the face, and, if possible, and all parts of the body are not in the plane of rotation of the disk.
• Wait for a complete stop of the disk rotation and only then put the tool on the floor with a disk up so as not to damage it;
• Turn off the grinder from the network;
• Make sure that there is no smoke or other signs of fire.

A typical error that is made during metal cutting: if the diameter of a new circle is larger than the size of the protective casing, it is removed. The casing is a protection in case the disk is broken and scattered into parts during the cutting of the metal.

Instead of a disk, many put mills, saws or other improvised materials. Do it strictly forbidden.

How to cut metal with a grinder correctly. Practical advice and recommendations

If long pipes lie on the supports, you need to cut their hanging edge. If you cut them in the middle, then due to its own weight, the metal will bend and click the disk.

If there are no skills in handling a grinder, then before the start of work, you should learn to cut on unnecessary details.

The cut.Out circle perceives only radial efforts. An attempt to change the cutting plane when the disk is inside the metal part will lead to its breakdown.

The metal of the disk (near the lower part of the circle) cuts the metal more efficiently.

In order for the grinder and disks 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 Bulgarians who are afraid of overheating.

To increase the life of the disks, especially expensive, and cool the metal, the cut site must be watered with water. It is advisable to work together.

Aluminum. Very viscous metal. When cutting a part of large thickness in the seam, you need to drip kerosene, observing the fire safety rules.

For molding, sawing tin, figure threads, the developed discs should be used. “Buckles”, so do not immediately throw them away.

The corner is correctly cut in at one time, but separately both shelves.

If long pipes, corners, fittings lie on the supports, correctly cut the hanging edge. If you cut between the supports, the part is bending due to its own weight and the disk will jam.

Details of large thickness are cut only straight. If you need to cut the figure detail, first straight sections are made, then the remaining unnecessary parts are removed.

Should not be pressed on a grinder. This will lead to jamming or breakdown of the disk and overheating of the grinder. If the cutting process is slow, the disk should be replaced.

The resulting cut is not worth the side of the disk. For this, another type of disc is used.

Molten particles of metal and abrasive, falling on plastic products, glass and headlights of the car, get into them, and then it is almost impossible to remove them. Therefore, before the start of work, they need to be removed or protected.

Features of hydro.Carbonated aluminum cutting

Using aluminum cutting with plasma cutters according to hydro.Carbaric technology, you can get the necessary blanks with excellent cut quality, with the average roughness parameters.

It is important to know: the principle and technology of plasma cutting metal

Hydrobrazic cutting of aluminum occurs with minimal losses, despite the thermal conductivity of aluminum, is a fire and explosion-proof.

Hydroabrase aluminum cutting is based on the use of specially purified water and abrasive grains in the technological process, the category of which is selected taking into account the characteristics of the processed metal and the type of work (under what conditions are carried out).

Under the influence of water.Jet technology, it is possible to cut metal materials with a thickness of up to 300 mm, which allows you to combine thin.Leaved products into a total packaging and process them in one stage.

In addition, hydro.Carbraise cutting of aluminum material and its alloys makes it possible to perform high.Precision cutting of products with complex shapes.

And this means that a qualitative result can be achieved even with the formation of internal radii, bevels and sharp corners.

Hydroabraseic cutting. Environmentally friendly technology, distinguishes its lack of dust, chips and chemical microparticles.

If necessary, serial cutting of aluminum, use a hydro.Carbonated machine with CNC. Practical software does not require the intervention of the operator in the workflow.

In this case, the cutting of the metal occurs strictly according to the given program.

How to work. Safety precautions (hereinafter referred to as TB)

I will not walk around the bush. With safety measures Ushm full mess. There are no intelligible official recommendations. According to the instructions, a grinder is a grinding machine, but the spectrum of work performed by this electric tool goes far beyond the framework of grinding and polishing and polishing.

Let’s try to deal with the issue of security based on existing practical prerequisites.

5.One. Good tool. Why you need to buy it

I write absolutely seriously about this aspect in the safety precautionary. Choose a strong and reliable tool. A good bell is worth everything one.5 living wage. On average for 1 month A healthy person in the Russian Federation earns 7.5 mines. This is a year 90 minimum wages.

It turns out that for high.Quality Ushm with protective mechanisms structurally laid manufacturer, you need to give everything 1.7% from your annual income. Than reasonable investment in their own security. In the furnace Chinese and cheap models!

I personally purchased Bosch Gws. Equipped with the Kickback Stop protective system, which disables the tool when jamming the disk. This is all salt. Also Ushm produced under the Metabo brand is equipped with a special coupling with a similar purpose.

Most likely, Makita also has something, but I will not say. I do not own accurate information on this manufacturer.

Meanwhile, if the grinder is not equipped with an auto shutdown when biting an abrasive circle, then two equally unattractive options are possible:

One) The disk will fall apart and the wreckage will fly at the linear speed, which we now calculate for a disk with a diameter of 125mm and the number of revolutions of 12,000 rpm:

Diameter d = 125 mm = 0.125 m

The length of the circle c = pid = 3.140.125 = 0.392 m.

Frequency ν = 12000 rpm = 200 rpm.

Linear speed v = Cν = 2000.392 =78.5 m/s

For a grinder with a circle diameter 125mm and number of revolutions 12000 rpm The linear speed of the discs of the disk will be 78.5 m/s.

Previously, there was an error in the calculations. Many thanks to Pavel Serkov and Dmitry (unfortunately the surname is unknown) for letters indicating a rude miscalculation.

2) The disk will withstand and then the grinder will tear out from the hands, which again from the construction tool will turn into firearms. Here and without formulas it is clear that a rotating disk will enter a person like a knife into the oil.

5.2. Work without a casing is a game of Russian roulette

The casing should always be between you and the axis of the rotation of the tool. Situations will certainly arise when the casing interferes, but this is not a reason to dismantle it. Use a grinder with a quick adjustment of the protection position (I wrote about such a tool above)

In the vast majority of cases, the protective casing works like this:

The disk destroyed, bounced off the casing and the fragments were in the zone safe for the Ushm operator, but on the contrary, potentially dangerous for his partner and other people in the work area.

Attention! Sometimes a fragment can “suck” through a casing or flying through a ricochet. The presence of a casing is not a reason to forget about personal protective equipment.

5.3. Eliminate extraneous objects

I believe the explanations are not needed, organize your workplace properly.

5.4.One. HEAD. EYES

Protective glasses. Not a panacea, but better than nothing.

The author knows what he was talking about and had a dubious pleasure to walk with a red eye when he sawed tiles. I didn’t get into size. It was necessary to cut a little bit, was too lazy to put on the protective glasses and caught an eye from a fragment from tiles. It is to blame.

Protective glasses. Not a panacea. Use them only if there is nothing else, but even in protective glasses when working with metal may surprise you

Chip. Two words about first aid

The Internet is full of stories about how chips have leaked into the eye even if protective glasses were used. At the same time, it hurts to blink. The chips scratch the eyelid and not everyone will be able to endure before taking the doctor. In this case, at their own peril and risk act as follows:

One. Do not touch the eyes.

They drip from a pipette in the eye of Lidocaine (sold in ampoules in a pharmacy). It will burn a little when the burning sensation passes and the pain is 10-15 minutes.

Make the insides of a cigarette filter. Cut along an acute angle.

Then the thin end of the filter. Pruning is produced chips. She literally magnetizes to this porous material and is visually clearly visible.

Instill albucid into the eye and go for a control examination to the doctor.

Protective mask. Facial

“Advanced” put on a shield of a turner, which will really protect the eyes from chips, but nothing more. Remember the initial speed of the debris of the disk 78.5 m/s And we look at the photo from the Hansa: