How the disk from corner grinding. Before work

Why can a disk on a corner grinder fly up

Working with a corner grinding machine. in the colloquial of a corner grinder. this is a very traumatic occupation. Patients who suffered in case of non.compliance with the safety rules when working with corner grinder are constantly applied to traumotological points.

Due to a significant number of revolutions of the disk of the corner grinder, the accumulated centrifugal force is such that even its planned shutdown occurs with a delay to repay the inertia of rotation.

Under no circumstances, it is not recommended to use an angular grinder without an installed metal protective casing. This safety requirement is the same for an angular grinder with a small disk diameter. from 115 mm, and for large and powerful cutting machines.

The pieces of the destroyed disk flying at high speed fly along the unpredictable trajectory, and if even in the human body, which are protected by overalls and shoes, lead to injuries of varying severity.

The main reasons why the installed disk may fly up:

  • Installation of a cutting disk for metal or stone with impaired integrity. A pack of disks that fell on the floor in a store or in a warehouse can be partially broken, but the defect was not detected before installation due to a lack of lighting or fatigue of the employee. The disk is recommended to be examined for detection of breaks. Broken disk, even if this fragment is held tight. it is forbidden to use.
  • A disk with a large disk is installed in the corner grinder than the internal landing diameter is required. This is rare, when using random discs. It is forbidden to use discs, hoping to install them specified and pressed with a clamping nut. The cut.out disc is centered only by planting a metal inner part on the protruding part of the shaft.
  • A larger diameter disk is installed on an angular grinder with a casing removed. The result will be the excess of the estimated speed of rotation and destruction. Discs of any diameter are designed for the angular speed of 80 meters per second. Disks are calculated on the speed of rotation from 11.000 revolutions of the smallest. 115 mm, up to 6500 revolutions in a disc 230 mm with a diameter. In addition to increasing centrifugal force, the rate of contact of the cutting part will be greater than the calculated.
  • The disk is deformed in the plane when improper storage. If the installed disk visually vibrates, it must be replaced.
  • When cutting off the profile with the necessary lining of the disk into the processed part, the likelihood of its destruction increases sharply. The disk is jammed due to the fault of the operator who violated the correct position of the corner grinder turned on. For this reason, if possible, it is better to make it with a minimum possible dive of a disk in a part. This effect disappears if the angular grinder is fixed in a special detachment stand that does not allow distortion during the cut of metal.
  • The use of cutting discs as grinding is not permissible, even if earlier the operator successfully did this operations. Grinding work is carried out in a thicker and stronger disk, the strength of which is designed in such a way that it allows you to meet the “VST” protrusions on the processed part.
  • Excessive pressure of the operator on an angular grinder to accelerate the cut. leads to its bending, tuning the fragment and a sharp shock load of the edge of the disk on the obstacle. The disk must be replaced.
  • Insufficient pressure on the corner grinder can make it suddenly go in the direction of rotation, and get to the elements of the processed structure with further destruction of the cutting disk.

Working with corner grinders led to a partial loss of working capacity and disability of many workers. A condescending attitude to such work, unnecessary frugality in relation to a whole disk, maybe we slip through without a casing, more conveniently to climb. they have repeatedly led to serious injuries.

Knowing the reasons why the disk can fly up during work will help maintain your health.

Without TB. Death from corner grinder

This article is not written for entertainment purposes. As stated in a brief description preceding the article, evidence of the consequences of the work of a traumatic tool with safety impairment is collected here. The basis for this material was the theme of the forum called “Death from Corner Grindowing”, which appeared back in 2006 (the occasion was the tragic oversight of the worker, whose witnessed one of the participants in our forum) and has been actively replenished with all new and new dramatic stories from the life of both professional workers and ordinary householders-amaters. As you will see from the following examples, in most cases the tragedy could be avoided by observing the elementary requirements of TB, but negligence, excessive self.confidence, and sometimes banal stupidity often lead to irreparable consequences. Mostly the authors of the posts given below were experienced builders who either received any injuries in production or became involuntary witnesses of such cases, so the article was written primarily for those who rarely use the tool and therefore often not even guessed, What danger can a completely harmless tool at first glance can carry in itself. In the process of collecting the material, for the experiment, we gave us to familiarize ourselves with the draft of the article to some employees of our editorial office. There was no one of them who would not have rusted from now on working without observing TB. And we, of course, hope that the article will become useful for you!

Art: Today, a guy from a team of builders died in our hospital building. He took off the protective casing from the corner grinder, installed a larger diameter disk. The scattered pieces of the disk killed blood vessels, nerve plexus of the neck. Incompatible injuries with life. In shock, he climbed the floor above, to the working department. Everything along the way is flooded with blood. Neither experience nor arrogance will replace TB.

SPECKY: A man of an angular grinder 230mm from work brought with a disc from the circular. His wife says, like let’s go, we drink firewood. Only the log touched, the bootkark was vomited from his hands and slashed along the lower leg. He died right in front of his wife’s eyes from blood loss. his wife was awesome and she couldn’t really stop blood.

There are many such cases. We give several examples of how exactly the TB is violated when working with a corner grinder. The following most common errors and violations can be distinguished: the work of a corner grinder without a casing, the work of a corner grinder with a disk is more intended for the diameter model, the work of a corner grinder with a saw or concrete disk, work without proper protective equipment (in particular, without glasses).

This photo contains “modified” corner grinders-killer lifers with saw discs. And this is still half a bastard, when a careless, but experienced worker consciously risks, installing such discs on a corner grinder. But when manufacturers and stores are already openly offer customers (often not pose a danger) such deadly devices, this is already too much: it is already too much:

Dmitry T: Today, when buying the next device, I saw this. over, this is offered for 230 mm angular grinding grounds in complete seriousness. I will not say what will happen when the corner grinder can break out of the hands. But if the chain breaks and in the eggs or on the bad head Brrrrr.

SOL: Diold burns The catalog saw: they offer a corner grinder in a case with a saw wooden disk. The scan is attached.

And one more example, which is comparable except with a Russian roulette: Glazkov_ro: the master works 115 corner grinders 230m and 400m disk. The casing, of course, is not put.

For those who do not quite understand what is so dangerous in all this, we have prepared several short answers from experienced forum participants:

VLAD_31: made repairs, removed the floors-wood-piece stove on the lags. For the speed, I put a saw disk for a tree on a corner grinding. a jigsaw then was not At first a terrible vibration, then fear dulled, I remember or cut it or just pulled out a delight with power. Then there was a moment that I caught myself squatting and saw on myself I understand with horror that if I can’t hold this terrible thing in my hands now, then I would soak myself all the childbearing and others that follow him. Turned off, covered with cold later. He did not work that day. just drank beer. And the disk threw away from sin away! Now if I work. protective shield, leather gloves, I do everything to comply with TB.

Kotenok: This is my first work with a corner grinder-900- bought a new one))) the finger dragged under the notorious protective casing. Thin diamond sector disk in concrete. In principle, and the TB seemed to be observed, sawed the wall in the corner, stumbled a bit, looked up against the wall, yes unsuccessfully.

Val102: I put a metallic disk from the circular on a large corner grinder and began to saw plywood. At first there was an euphoria t.to. I cut it like butter, then a cut brush and 7 operations per year Unfortunately, I can’t describe details. I don’t remember the moment from pain shock. By the way, I also cut the second hand. I think so, teeth, clinging to the material, with a large pressure or during a skew, give a strong progressive movement to the tool, and it went for a walk by hand.

disk, corner, grinding, work

Yuriki: Photo of a happy person alex_dr: why not be satisfied? Survived.

Commentator: polished the old paint in the country from the house. Put a grinder on an angular grinder 115 mm. He took off the defense, a fool In the process he held out his hand standing on the stairs and the corner grinder was thrown back (the cloves hit the hat) on the chest. The sweater quickly wound a disk, and began to polish my chest :-))) I didn’t have time to disable or jump off-a share of the second. But! I know that when working with email. The tool needs two people. the son below insured. I screamed him, and he managed to pull out the cord from the outlet. Only a little skin on the disk from the chest left.

Corner grinder, or natural selection tool. (slightly about security) ⁠ ⁠

On the wake of posts about grinder and other angular grinds)) I observe a lot of stories as a man with a corner grinder cut off his hand / leg \ head, the disk was chopped into the thigh \ face \ cerebral cortex, which on the corner grinding can not work with saw (circular). Let’s go.

disk, corner, grinding, work

I have serious experience with power tools and corner grinding in particular since 16. 12 years, very significant. With circular disk 7. I had 1 accident-chuvak at my facilities roughly neglected safety precautions and greatly damaged the foot. So, what I see, just reading the posts: the absolute majority of gross violations of TB! (although the instrument and equipment, yeah, are almost always to blame) let’s go through the basic rules a little (all pictures from tyrnets)

The direction of the cut. The direction of the cut should always be sparks on itself. There are several reasons, and almost everything can be seen in this very successful picture.

1) the direction of movement of the tool after loss of control, uncontrolled exit from the cut. That is, when the disk spins “on itself”, if the corner grinder bites (metal corner, sharp change of material, knot, crushed and burst the disk)-this beauty will fly forward! Not an employee. Actually, this is how it was with us, with our emergency. It flew to this “fellow” in the leg, thanks to the independent transfer of the handle (cut in the other direction) and the workpiece was recorded for compression (more on that later). Personally, I had 7 times a bit of a disk so that I lost control of the machine. And at a height, also (when you cut the stroob in the LEF and reinforces reinforcement, for example). Two corner grinds in the end into the scrap, crashed, from my injuries, I broke my elbow, while flying from the platform. Sharped, damn) By the way, for jokes, so young corner grinders with a diameter of 230 mm with a vertical cut during a snack, torn from a place upward about 15-20 90 kg of a guy. So think if you can hold it if this fool flying in the leg. Sparks fly into the eyes? Well, what did you want. Glasses do not help? Yes, I know. For example, I work with metal in a welding mask with a folding light filter. Raised and ordinary transparent plexiglass. Cheap, angry, absolutely safe. Burning pants? Jeans live for a very long time, berets. And in general in slippers and shorts of such a tool, a little arrogant to be a mistake.

2) Well, the scatter of the disk is shown in the picture very high quality, there is nothing to talk about.

3) the correct location of the workpiece. Reliable fixation and t.D. And after cutting, part of the workpiece should fall under its weight / move away from the workpiece without pinching the disk.

4) incorrect disk position. Well, EPT, well, not funny. As soon as they do not cut. If you have little experience working with an angular grinder and it is not your constant tool, only at 90 degrees to the surface. If the disk is not even, but bend the ultimately necessary for its breakdown, siiylo decreases not in your favor.

5) This is more from the category of tips, or something, will help many professionals. Under a protracted nut, put a piece of paper folded several times and feel free to tighten. The disk does not pull, does not squeeze, easily removed without a key.

6) Circular disk) Well, it only looks scary, in fact. There are precisely special, with a diameter of landing and the estimated speed of rotation. Subject to safety precautions is not more dangerous than the same dry. Turn some kind of garbage from the sawmill and I would be worried. And also important, make the side of the disk installation.

7) power. Yes. Suddenly. Select the tool taking into account the tasks. Ideal for everyday life and many prof.works-180 mm, 1.8 kW. A very powerful thing, you can work quite confidently on top, you can hold and have time to react. With a trifle to work, we take a smaller animal. Well, 230 mm and 2.5 kW is already a highly specialized tool and you really need to be able to work with it. For example, I have 180 and 125 mm. Although I somehow bought a fool of 230 mm, after my partner threw it on a chair, they sailed. It was after that that they realized that it was better to pass twice less powerful. But, for example, tilers-trowel are needed precisely powerful corner grinders. IMHO, corner grinder more than 180 mm, for the work of purely “top-down” and errors in the technique of work do not forgive. But this is only my opinion, many gurus of welded business with her do this. But a beginner and a non.professional is better to stay away from such a thing.

8) wrong disk selection. Oh yes, this is a favorite. First we grind the profile of the disk to the cordial grill that it is a little thicker than the paper, and then we are surprised, the disc has burst. For each type of work, the equipment is equipped! There are sandpaper (sharpening), grinding (petal, felt, etc.D.), a variety of detachment. Well, you should not ignore them because of your own laziness.

9) Defense removal. Well, this is already natural selection, cheap. Darwin Prize.

10) serviceability of the electric wire. There was somehow a case, isolation was damaged. Pierced on the skin, lost control of the corner grinder, the corner grinder flew into the country of drilled things and crashed against the wall.

11) the correctness of the cut itself. Shown in the picture. Do not invent anything new, fraught with troubles.

In general, if you summarize all the TB with a corner grinder boils down to: a) the correct selection of tools and equipment, compliance with the cutting technique.B) PPE. Glasses are not so 100 % saving their eyes, a mask with a folding light filter or a plexiglass shot, more reliable. Clothing-tight (jeans at least), durable shoes, non-combustible. The perfectly-coopeum of a tarpaulin made of tarpaulin and berets made of whole leather or even a Kiraza, without fabric inserts (burn out, verified). Gloves-earnest loud. Also for a very short time, but at a price of 25 p, two or three pairs per day, no special consumption. I would not advise kraga, you don’t feel a button, with a very bare hands, the skin is leather and there is a great risk of getting burned on the workpiece.C) air circulation. Provide good ventilation, gases formed during the cut process are able to spoil health.

The corner grinder bites the disk: two harmful “folk” advice to get out of the problem and one correct

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Sooner or later, every owner is faced with a problem like the jammed nuts and a bite of the disk of a grinding machine. A similar situation puts many citizens at a dead end. On the Internet, you can find a “million” recommendations of varying degrees of usefulness in this regard. Consider the three most popular “folk” options and we will figure out why it is better not to use them. And also talk about how to prevent jamming and what approach in the treatment of the problem will be the only true.

“Folk” harmful advice

The problem of the vast majority of tips on the corner grinder from the people is that they all violate the safety of working with the tool in one way or another. Is it necessary to say that if the road is life and health, then it is better not to violate TB? After all, among other things, at the workplace, the implementation of such amateur performances may end with a minimum of deprivation of a bonus from the sanction of the safety engineer.

Harmful advice: to break and hire a disk. The essence of this method boils down to breaking a jammed disk with a corner grinder with a suitable tool as much as possible. After that, a sheet of tin is taken, the thickness of which will be a plus or minus equal to the width of the old disk. Tin is clamped in a vice, after which the residues of the disk is an angular grinder simply erased about it.

The problems of the Council are primarily a huge danger of this method for both the employee and for all others. The scattering fragments of the disk can apply very serious injuries. Especially in the absence of protective funds. The second problem. this method is extremely demanding on the skill of an employee. The third problem is that many modern discs are just not possible to hide because of a metal ring-building ring on the inner ring.

You can try to warm up the nut, but the effect may be the opposite. |

Harmful advice: warm up a clamping nut. The essence of this method is to heat the clamping nut due to friction about wood. After that, she allegedly should unscrew much easier and faster.

Problems of the Council Metal expands in all directions. And this means that with a greater degree of probability, the nut will be delayed even more, which will make its subsequent unscrewing an even more difficult task.

How to remove a stuck disk from a corner grinder?

Many masters recommend when working with a corner grinder to make disks-laying. It is believed that an ingenuous product from cardboard can protect the tool from too strong tightening the clamping nut. In most situations, it really works. If there is no desire to mess with cutting out, then such gaskets can even be bought in a construction store. However, it is much more important to know and remember the only correct recipe for biting. All that the master needs to have is a suitable key for corner grinder.

Of course, there are different situations. And sometimes even the key ceases to help. This happens when the nut is delayed to the limit or licks as a result of previous unsuccessful attempts to remove with the key. In this case, the problem will only be solved in the most radical way. cut the nut entirely with the help of another angular grinder.

And here is an interesting video from our channel:

If you want to know even more interesting about the tools, then it is worth reading about what the Canadian screwdriver is: when it appeared, and why some consider it the best.

How the disk from corner grinding

For several years now I have been using a corner grinder in the summer household, and all this time I have no answer to two questions: which side to put a cut.off circle, and in which direction it should rotate. “Shoveled the entire Internet”, but I did not find a definite answer to these questions. Opinions were divided equally. Both side gives convincing arguments, and at least some authoritative official documents on this topic are silent. Manufacturers are also silent. Today I want to speculate a little on this topic with the aim of deciding, for starters, with the first question.

So, which side to put the cut.out circle on the corner grinder?

disk, corner, grinding, work

Essence of the question. In the center of the circle (cutting or grinding) is a galvanized steel ring, which has four punched holes around with a circle, usually with the edges dented down, to obstruct this ring about the abrasive. The inner edge of the ring is wrapped inside the circle, into its central hole, and flies on the opposite surface of the circle, without reaching it.

As manufacturers say, this ring is made to protect the shaft rotating the grinding circle. “With a high degree of probability”, this is its main function, otherwise the abrasion of the disk will suffer a groove on the shaft of a corner grinder with time, and it will not be possible to centr. I note that in the production of circles, the ring is pushed during the press of the disk from above, after the entire pie from the grid and abrasive is formed. So no technological function, as somewhere skipped in the Комментарии и мнения владельцев from the “authoritative” source, it does not carry. I looked at a certain number of different rollers for the production of circles, and everywhere the technological process was approximately the same. the ring was pressed into the disk already during the compression of the formed disk by the press.

The ring, as a rule, is located from the side of the circle label. However, there are circles in which the ring goes on both sides of the circle, and on some circles with a drowned middle, it is located only from the side opposite the label, and is located on the drowned side. That is, manufacturers sculpt rings in different ways. Although, I must admit, most of the cup circles still have rings on the convex side, which is “like hint”, which is preferable to put the wheels with a ring down.

At the very beginning, after buying a corner grinder, I intuitively put a circle with a label outside. In that circle, a metal ring in the center was also attacked from the picture. So sawed, and did not feel problems. But then I got a circle circle (with a drowned center), and in it the picture and the ring were on the convex side. I put it with a picture out, and it turned out that the circle would pick up the protective casing. I had to turn the circle. Then I had this question for the first time.

The other day, looking at the YouTube tools, I came across a discussion of this issue, and decided to find out for myself how to put a circle correctly correctly? As I mentioned above, opinions on the Internet on this issue were divided equally. Then I began to make my own point of view.

  • Rings on circles, including cups, are sculpted from different sides, although more often they are on the convex side from the side of the label.
  • The direction of rotation is not indicated on circles.

ШОУ МОКРИВСКОГО ГДЕ ЛОГИКА СО СТРИМЕРАМИ / ШАДОУКЕК, ГЕНСУХА, ГУАКАМОЛЕ, ФРУКТОЗКА / MOKRIVSKIY

Then I carefully looked at the puck and the nut, between which the disk was attached to the shaft of the corner grinder:

On the left of the puck that is put on the shaft. Has a ribbed surface and a rubber ring at the inner edge. On the right, the nut has, although not polished, but rather smooth surface, which lies up in the photo. The circle should clamp between them. At first I thought that the ribbed surface of the washer was created to hook an abrasive, and a smooth nut should slide well along the ring so that it could easily tighten it. But a little embarrassed by the rubber ring, which was clearly done in order to cling to a smooth surface, and probably would have spoiled if it often had to press the edge of the hole from the side of the abrasive.

I tried it and so and so insert a disk between the puck and the nut, and twist the details with your hands to understand in which case the part clings to the disk better. So, a puck with ribs and an elastic band in any case clings the disk better, even behind the ring, but the nut glides even along the abrasive. I also noticed that the circle on the puck is easier to dress with a ring, because from the side of the abrasive there are burrs that prevent free putting on the neck on the neck of the puck. So the results of these experiments clearly indicate in favor of installing a circle with a ring down, on the puck. That is, label down.

I noticed another nuance. The clamping surface of the fast.and.packed nut has a significant backlash regarding its thread, which allows it to press circles, even if there are abrasive bumps on their surface. In this case, such a disk will press exactly. If you turn it over, then he will fall as an abrasive on the puck from a certain angle, and he will have a transverse beating. This is another argument in favor of installing a circle with a ring down to the puck.

Everything that I listed above follows only from constructive features. Now a few words about practical convenience.

10 Amazing & Useful Angle Grinder Disc !!!

Not all corner grinders have such a quick.and.packed nut as mine. If this is a simple nut with turnkey holes, then it is easier to tighten it not with a key, but by itself around. This will turn out easier if the abrasive will cling to this nut. That is, in this case, you should also install a circle with a ring to the puck. They also say that if the nut is adjacent to the metal ring, and when you bites the circle, it clamps, it becomes much more difficult to unscrew it than if it adjoined the abrasive crumbling in nature.

In general, after long thoughts, I knocked down to the conclusion that a flat circle should be placed down to the puck, and if the disk is cup, then here you can only put it in one position, regardless of which side it will have ring.

El_Pir sent me instructions for the Metabo WP 850 corner grinder, in which it is written in black and white:

Why millions of people cut spars from themselves and how they threaten it? ⁠ ⁠

Corner grinder is the most popular traumatic instrument. If someday, someone will compose a rating of tools of crippled people, then the angular grinder will definitely take the first place, leaving far from a separation from any other machine or tool. And in most cases this is due to improper operation.

By the way, at the end of the publication there will be a video with very simple, but at the same time with a very effective way to protect against sparks.And so, if we polish wood or metal, then there are no questions, it is definitely necessary to polish so that the chips and dust from grinding fly away from us. Even if the disk is scattered when cleaning the metal, the fragments will fly away from you, and if some part will fly to you, then they will simply take on a protective casing.The main question is in which direction the sparks from the corner grinder should fly if we cut the metal? On yourself or from yourself?When we begin to cut metal, along with sparks, the theoretical possibility of return appears. For those who are not aware of what I mean, then the return. This is an instant reaction to a clamped disk. Squeezing leads to the instant stop of the rotating mechanism of the corner grinding, which leads to the fact that the uncontrolled corner grinder (which stupidly pulls out of the hands when the disk is jammed) begins its movement in the parting of the disk rotation. And in this case, the corner grinder either moves on you or from you.Let’s schematically draw both options to understand how sparks, fragments and tools will behave themselves.

According to this scheme, it turns out that if you cut with sparks on yourself, there is a risk that in the case of the discharge of the disk, the fragments will fly in your direction, and if you cut with sparks from you, then from you. But, even if the disk is scattered, with a “spark” position, the protective casing takes all the fragments. I say this their personal experience, in my memory I had a “sparks on myself” 4 times, and I have never even a hint of a fragment flight in my direction (each time there was a protective casing on a corner grinder).And most importantly, when we cut the sparks on ourselves, we need not to stand outside the corner grinder, but a little side of it, away from the predicted flight of fragments.And now the most important danger that is fraught with a corner grinder. Sparks and fragments are baby babble. Background. This is the most important test that the angular grinding. When cutting metal, for various reasons, a cutting disk may clamp. And then we have a return. Even 115, the smallest, corner grinder in this case is almost impossible to hold in your hands, which is already talking about the models of more.So, if we cut the sparks on ourselves, then the tool will simply tear out of the hands, and it will fly in the direction opposite to the operator. But if you cut spars from yourself, then when you give out, a tool that, even with a released start button, continues to rotate at speed 10 by inertia.000 revolutions per minute, will fly to the operator. If you have a little imagination, then you yourself can imagine both cut offs and legs and interrupted arteries and a lot of things that are still quite suitable for the plot of Hitchcock films.So why do people continue to cut spars from themselves? Everything is simple, who saw the thread of the explosion of a light.school grenade? A lot of sound, light, smoke, but it does not cause any damage. The same thing with corner grinding, people are afraid of sparks, because until the corner grinding is jammed, in their opinion, this should be afraid most of all.Waiting for your opinion in the Комментарии и мнения владельцев. Well, the video that promised at the beginning of the publication:

Before taking corner grinding in your hands.

If you decide at least a rack to use a corner grinder without a casing, be sure to polish the information below. Most likely, after watching this article, you will better go to the store and buy a new tool with normal protection. Anyway, everyone who uses a corner grinder is very recommended for familiarization.

Let’s start with pictures from doctors: and again some forget about TB. A man or woman, or a child (I won’t say it anyway, oh this medical secret), neglected the same TB, working with a corner grinder, as a result below. I don’t like many letters, so we look. I can’t show the video of the extraction for the above reason, so only screenshots, well, sorry. I will say right away, nothing is vital, and unexpectedly important is not hurt. Bones will grow together, well, and a scar, where without it.

disk, corner, grinding, work

Do not worry, everything ended well and we sat down to have dinner, because a well.fed doctor, a good doctor.

Without TB. Death from corner grinder.

This article is not written for entertainment purposes. As stated in a brief description preceding the article, evidence of the consequences of the work of a traumatic tool with safety impairment is collected here. The basis for this material was the theme of the forum called “Death from Corner Grindowing”, which appeared back in 2006 (the occasion was the tragic oversight of the worker, whose witnessed one of the participants in our forum) and has been actively replenished with all new and new dramatic stories from the life of both professional workers and ordinary householders-amaters. As you will see from the following examples, in most cases the tragedy could be avoided by observing the elementary requirements of TB, but negligence, excessive self.confidence, and sometimes banal stupidity often lead to irreparable consequences. Mostly the authors of the posts given below were experienced builders who either received any injuries in production or became involuntary witnesses of such cases, so the article was written primarily for those who rarely use the tool and therefore often not even guessed, What danger can a completely harmless tool at first glance can carry in itself. In the process of collecting the material, for the experiment, we gave us to familiarize ourselves with the draft of the article to some employees of our editorial office. There was no one of them who would not have rusted from now on working without observing TB. And we, of course, hope that the article will become useful for you!

Art: Today, a guy from a team of builders died in our hospital building. He took off the protective casing from the corner grinder, installed a larger diameter disk. The scattered pieces of the disk killed blood vessels, nerve plexus of the neck. Incompatible injuries with life. In shock, he climbed the floor above, to the working department. Everything along the way is flooded with blood. Neither experience nor arrogance will replace TB.

SPECKY: A man of an angular grinder 230mm from work brought with a disc from the circular. His wife says, like let’s go, we drink firewood. Only the log touched, the bootkark was vomited from his hands and slashed along the lower leg. He died right in front of his wife’s eyes from blood loss. his wife was awesome and she couldn’t really stop blood.

There are many such cases. We give several examples of how exactly the TB is violated when working with a corner grinder. The following most common errors and violations can be distinguished: the work of a corner grinder without a casing, the work of a corner grinder with a disk is more intended for the diameter model, the work of a corner grinder with a saw or concrete disk, work without proper protective equipment (in particular, without glasses). This photo contains “modified” corner grinders-killer lifers with saw discs. And this is still half a bastard, when a careless, but experienced worker consciously risks, installing such discs on a corner grinder. But when manufacturers and stores are already openly offer customers (often not pose all danger) such deadly devices, these are already too much: Dmitry T: Today, when buying the next device, I saw this. over, this is offered for 230 mm angular grinding grounds in complete seriousness. I will not say what will happen when the corner grinder can break out of the hands. But if the chain breaks and in the eggs or on the bad head Brrrrr Sol: Diold burns the catalog saw: they offer an angular grinder in the case with a saw wooden disk. The scan is attached.

And one more example, which is comparable except with a Russian roulette: Glazkov_ro: the master works 115 corner grinders 230m and 400m disk. The casing, of course, is not put.

For those who do not quite understand what is so dangerous in all this, we have prepared several short answers from experienced forum participants:

VLAD_31: made repairs, removed the floors-wood-piece stove on the lags. For speed, I put a saw disk for a tree on a corner grinder. there was no jigsaw then. At first, terrible vibration, then fear dulled, I remember or cut the nails or just pulled out a delight from power. Then there was a moment that I caught myself squatting and saw on myself I understand with horror that if I can’t hold this terrible thing in my hands now, then I would soak myself all the childbearing and others that follow him. Turned off, covered with cold later. He did not work that day. just drank beer. And the disk threw away from sin away! Now if I work. protective shield, leather gloves, I do everything to comply with TB.

Kotenok: This is my first work with a corner grinder-900- bought a new one))) the finger dragged under the notorious protective casing. Thin diamond sector disk in concrete. In principle, and the TB seemed to be observed, sawed the wall in the corner, stumbled a bit, looked up against the wall, yes unsuccessfully.

Val102: I put a metallic disk from the circular on a large corner grinder and began to saw plywood. At first there was an euphoria t.to. I cut it like butter, then a cut brush and 7 operations per year Unfortunately, I can’t describe details. I don’t remember the moment from pain shock. By the way, I also cut the second hand. I think so, teeth, clinging to the material, with a large pressure or during a skew, give a strong progressive movement to the tool, and it went for a walk by hand. Yuriki: Photo of a happy person alex_dr: why not be satisfied? Survived.

Commentator: polished the old paint in the country from the house. Put a grinder on an angular grinder 115 mm. He took off the defense, a fool In the process he held out his hand standing on the stairs and the corner grinder was thrown back (the cloves hit the hat) on the chest. The sweater quickly wound a disk, and began to polish my chest :-))) I didn’t have time to disable or jump off-a share of the second. But! I know that when working with email. The tool needs two people. the son below insured. I screamed him, and he managed to pull out the cord from the outlet. Only a little skin on the disk from the chest left.

How to keep a corner grinder while working

The correct grip of corner grinder will largely provide competent and safe work with the tool:

  • The handles of the grinding machine must be held tight with both hands, without tolerating its center of gravity to any one. With reliable capture, even in the case of a reverse blow, there will not be a serious shift in the tool, and even more so it is torn out of the hands.
  • The power cord should be located away from the rotating disk: its capture will create a risk of short circuit and a sharp stopping of the tool with the possible occurrence of a reverse impact.
  • A cutting line for a cutting cut should be placed in such a way that the corner grinder goes to the master, in addition, a person should not be in the plane of the likely dispute of the disk. The direction of sparks at the same time is possible both aside from the master, and for it. this everyone decides for himself. There are no options for left.handed options. when grabbing a corner grinder, the only convenient sparks for left.handed will go “for themselves”. And a mandatory rule. there should always be a bucket of water for extinguishing possible from the sparks of the fire.
  • It is forbidden to postpone somewhere a tool until the rotation of the working disc is completely stopped, otherwise objects that are not intended for processing may be hooked for processing.
  • If it is necessary to move the corner grinder from one place of work to another, it should be turned off, since any careless movement of the master (stumbled, swayed, fell) can lead to unpleasant consequences: injuries, seize foreign objects, clothes, etc.D.
  • The working disk is significantly warmed up during work, and, of course, you should not touch it until it cools completely.

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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