Where should the Corner grinding disk rotate. How to cut a corner grinding of a corner for yourself: from yourself or to yourself?

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How to work properly a corner grinder (corner grinding)

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

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

In which direction should the “corner grinding” disk rotate?

The disk on the left and, accordingly, rotation on themselves is a consequence of the fact that during work instinctively put the right hand forward, holding it the gearbox pen. The same when working with a shovel. Whoever holds a shovel, he works as a corner grinder. Although you can make yourself change your hand with an effort of will. T.To. I work with my left hand forward (disk right, rotation from myself), then, of course, I consider this option the only right thing: rolleyes:. Pros:

Sparks fly away, without causing any harm to me or corner grinder. Когда работают искрами на себя, то они засасываются вентилятором внутрь двигателя и со временем все обмотки начинают краснеть чистой неизолированной медью, как будто кто-то специально наждачкой потёр.

When biting, the corner grinder jumps out of the cut directly to my hands. You just need to always remember that you have a car in your hands with a capacity of several horsepower and hold these chewing hands with a hard hand. Under the working conditions, of course, you have to turn over the corner grinder, if you do not get a different way, but I always return to the usual option.

When working with a corner grinder, I try to avoid deep cuts. It is better to cut the corner in two doses, dissect the shelves in turn. I cut the channel in three doses, first the core then the shelf. Thereby excludes random pinches of the tool. Curvatar metal sometimes has to be cut, intentionally expanding cutting into two doses, especially if the cutting area is uncomfortable and an unintentional disorder of the disk is possible. I plan a fishing line for a cutting cut in thick metal and cut it off at 5-7 mm, cutting the edges of the cut. When cutting, the cutting should be avoided, the shift of the stack is fraught with distortion of the lower layers. Two elements of spatial structures should not be cut, when the disk cuts two elements that are spacing from each other at the same time, with a thin disk of the cut of the house, it is non.Parallel (not aligned).

The disk rotates around the fixed axis according to the law.

Determine the angular velocity, angular acceleration and the speed of the disk at the time t = 2 s.

Since ω 0, ε 0, the rotation is accelerated.

Publishing date: 2015-10-09; Read: 118 | Page violation

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In other words, how to properly “configure” an angular grinder to work with it is simple, convenient and safe!

Mansur Fattakhov: On the “intercosal” handle with a switch is turned over.

Mansur Fattakhov: The pen with the button did not turn over.

Vadim Rostov: It turns out somehow strange, if the power button under the fingers (which is quite logical), then sparks fly from themselves. If the sparks are at itself, then the power button looks up (in the palm) and how then to turn it on? The conclusion is obvious. Sparks only from itself!

Tsar of All Russia: sparks on itself, and the disk when it turns around, it will also fly into fucking. It is right for sparks from yourself, and in order to be convenient to cut and norms to hold a corner grinder, the handle must be held with your left hand with another grip, and not as the author shows the video

Rostislav Vodovrsov: Safely. Когда искры,а вместе с ними и разлетающийся диск летит тебе в е@ало,туловище и ноги. If you are a nausea and you can’t hold 230 corner grinding in the case of a snack. On@uya you, baran, bark. You blades, “sparks on yourself” is definitely three.Fingered sectarians.

Nikolay Novikov: It must be added that when cutting from yourself.

Andrey Melnikov: Spearry workers. Where to direct the sheaf of sparks is a completely separate story.You always need to think and see where they will fly, take measures so as not to spoil something, do not set fire, do not blow up.Very willingly, for example, car batteries fly away from angular grinder sparks, take note.Empty open gas tank heated by the sun may not explode, but it will not slap the fracture awakening the bear reflexes))) the welder of the welder if it is pulled out wonderful from sparks.Attentiveness is what we often lack, especially with a tone or.!”Sparks on themselves”. So simply called the very principle of operation of a corner grinder.The principle is correct, convenient, safe. Taking advantage of the principle of “sparks from yourself”, you often do not win anything in terms of convenience and security, and sometimes you do not want to notice loss.For example, “Tyca.Brows” in their garages, workshops, in general, safe sparks forward in the videos and upside down and all, when working normally, you can start down, even though a bucket of water substitute.

Adding a ROUNDOVER to Plywood Corners. Corner EDGEBANDING with splines

Igor 79: If the head is with the brains, it does not matter where the sparks will fly!

Nikolay Yurassow: This is only for left.Handed

Alexander Kruglov.: Everything was correct from the factory and the protective fence and the power button on the handle. At the beginning of the second minute, everything turned inside out. Now you have to turn your hands.

Murat Balaev: Why have two Serbs hung, right above the desktop, that you use them daily and why you need to install a cutting circle in a corner grinder, a pattern from yourself?

Provincial: sparks only along the corner of the corner grinder and this is not discussed

Natalya Yurievna: He worked as a “corner grinding” for 30 years, in the nineties daily, later much less often, I chose this way and I. I tried both methods, there was no Internet yet, because he himself began to explore the method. With small biting disk, it is more difficult to hold the tool, and if it bites well?

The correct position of the cut parts and materials

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

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

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

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

The subtleties of the corner grinder on wood

Different nozzles are used to grind surfaces. Most often, a circle is used, on which a round sheet of sandpaper is attached to a “Velcro”. The petal disk with sandpaper fixed on it is also used. It is more convenient, but the option with Velcro “reusable (with skillful handling), which is much more profitable with a large volume of production (a sheet of the skin is an order of magnitude cheaper than a petal nozzle). For grinding painted and covered with rust surfaces, brush and peeling discs are used, and to sharpen the cutting edges of the tools, respectively, sharpening.

Corner grinder Makita GA5030

The angle grinding machine is great for rough processing of wooden surfaces. The round nozzle grinds the surface very quickly. Several times faster than the usual grinding machine. This is due to the high speed of spindle rotation (10,000-12,000 about./min). But the high speed of rotation has the minuses. This is, first of all, a large amount of noise and dust during the operation of the device. So take care of good dust. When working in the room, it is extremely desirable to connect a construction vacuum cleaner to the CGM. And if the conditions allow, it is better to grind wooden surfaces on the street.

Another disadvantage of the angular grinder is the impossibility of properly adjusting the speed of rotation (this function is in vibration grinding machines, but usually absent in the Bulgarians). Only an angular grinder with an option to adjust the number of revolutions, a variety of polishing discs on high.Speed angular grinding machines cannot be set for polishing.

In general, the thin work is done by corner grinding at high speeds is much more difficult. Especially when processing the transverse cut of wood fibers. It is easy to overdo it and burn the wood (and at the same time spoil the circle of sandpaper). Do not press the tool very much to the wood, do not hold it for a long time in one place so that there are no subfalines due to overheating. And try to keep the tool tightly when working. A rotating circle with a skin (or petal disk) must be kept strictly parallel to the treated plane. The bias is fraught with damage to consumables and the processed surface.

With large.Scale activities, let the instrument rest and cool. Especially if it is a household tool. Such models are not designed for operation in continuous 24/7 mode, usually a maximum of 8-10 minutes of continuous operation.

Which side to put a disk on an angular grinder

Corner grinder disks have two sides. Front and wrong side. Often it is on the front side of the disk that a metal ring is located for a clamping nut, as well as the label of the manufacturer with different information related to the disk characteristics. It shows the diameter, the maximum speed of the disk, and other information.

I want to pay special attention to the metal ring, so to speak, for the rifle for the rod of the corner grinder, on which the nut is wound. Often the metal frame is located outside the disk, it is not on the inside. Therefore, if the disk is installed by the metal ring inside, then the pressing nut will attract it so strong that it will be problematic to unscrew it in the future to replace the disk.

corner, grinding, disk, rotate, yourself

You can avoid such a situation if you use cardboard lining for a nut. They can be cut from a piece of dense cardboard or paper. Thus, the nut will not stick so hard. It should be noted that the risk of spontaneous promotion of the nut increases. Therefore, I would recommend not to use various lining there, but to install the disk on the corner grinder correctly, namely, only with a picture and a ring outward.

Where should the Corner grinding disk rotate

In the past, we figured out which side to put the cut.Off circle correctly. Now I want to speculate a little about which direction the circle should rotate during cutting, and how to hold a corner grinder correctly?

Since the instructions from the angular grinder of Metabo already found out in my hands, I decided to see how this question was described there:

That is, regardless of the material of the cutting, for it is not mentioned, it should be done in the oncoming direction. At the same time, I want to note from myself that cutting a corner grinder follows what is intended for cutting corner grinders. If you suddenly want to use a corner grinder obviously not for its intended purpose, and cut, for example, a profile or other as thin materials that are usually cut with scissors, then it will already be difficult to saw in the oncoming direction, and it is dangerous. Therefore, I want to clarify once again. The instruction describes only cases of using the tool as intended.

If you look at the picture large, it can be seen that this is a view from above, and the work is carried out by a small corner grinder, although this is a common pattern for all Bulgarians:

Notice how the corner of the corner grinder is inclined. The corner grinder does not push forward, but pull on themselves. So much easier to hold it in your hands.

So, the direction of the cut should be towards the rotation of the circle, because otherwise the circle can jump out of the cut, and the corner grinder should be carried out. If the circle jumps out of the cut, the angular grinder can roll on it on the surface of the details on you, will somersault in weak hands, unfolds a cut.Out circle to you, and cut you in half. If the circle is wedges and it also jumps out and destroyed, in addition to the above, inertia of rotation scatters its fragments on the sides. If the circle wedges with oncoming crust and behave, on the contrary, it buries into the cut and quickly stops, and the big fragments remain under the detail, and the rest in the casing.

Often, with such oncoming cutting, sparks fly to the worker, and also close the direction of cutting. And fragments of the circle in the event of its destruction in this case will also fly in the direction of sparks. How then to be?

I think that safety is more important than the ability to accurately control the cut. When cutting sheets, you can use the guide from the corner. When cutting parts, their transverse size does not require constant monitoring of the direction of the cut. As for sparks and possible fragments of a circle, it is important to learn how to hold the corner grinder correctly. In the conditions of the workshop, this is not difficult. The right hand on an additional handle is perpendicular to the corps of the corner grinder, the angle is 100-110 degrees, that is, the right elbow even further than the front edge of the circle. Left on the case with a button, parallel to the corner grinder. Corner grinder parallel to your body. Sparks should fly by to the left of you. Cut is controlled from above and a little on the right, above an additional handle. You shouldn’t be in the plane of rotation of the circle at all.

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In conditions of a real object, for example, when dismantling metal structures, an angular grinder cannot be kept all the time as described. There is all hope for a casing, a mask, overalls and intelligence. However, you always need to remember the recommendations of the direction of rotation of the circle and the conduct of the corner grinder. At each cut, you need to understand which direction the corner grinding will tear when jaming, where fragments of the circle will fly, where the corner grinder itself will fly, how it will smoke at the same time, and immediately change the pose if the result does not suit you.

In the farm, very often you have to cut off pieces from long pipes, reinforcement, etc.P., which lie on the ground. It is often not possible to raise them to a vise level. You have to saw on the ground, and even a large corner grinder. How to protect yourself as much as possible in this case?

For several years now I have been working from time to time a large corner grinder with 230 mm circles. Naturally, with this mode of work, I will always have little experience, so I would like to determine the safest techniques for myself.

I see the most safe stance in the hands of a heavy corner grinder. The right hand, as usual, on an additional handle, the left on the handle with the button. The right leg, suppose, fixes the pipe on a wooden bar, pressing it on top, or just stands on the ground if the pipe is fixed. I bend and bend my right shoulder I rest on the right knee. In this position, I am in a position similar to a position in the workshop, but the weight of the corner grinder is not on the muscle of the right hand and back, but on the emphasis in the form of a knee. The left leg is set back, the foot is deployed perpendicularly, adding stability, but it is not included in the plane of rotation of the circle.

Not always the above stand is convenient, for example, if it is necessary to produce a deep cut of a wide pipes that cannot be rotated. Then I just get up so that the sparks fly back between the legs. Control of the cut in this case is carried out either on the left, from the side of the circle, or on the right (then the right shoulder again rests on the right knee). In the case of the scraps of the fragments, all hope in the above case only on the shield. But here it is important not to give a circle of lateral efforts, otherwise it will break it from the shaft, tearing it out the middle that will remain under the nut, and he will jump off the corner grinder, continuing to rotate at a frantic speed. Since you are in the plane of his rotation, he can cut you in half, rejected from the part or from the ground. I had a circle tore off my circle when I sawed rusted bolts from the plane, on which I slightly pressed the plane of the circle. Fortunately, the circle went neatly and just left for the time.

The shield on the corner grinding is required. When repairing cars, small corner grinders with grinding or even cutting circles without shields are often used to get up conveniently. Suicide, what.

Glasses (precisely protective, closing eyes from all sides) are required. When cutting or grinding, a bunch of stuck abrasive and metal fly in different directions, ricochec from everything, from which it is possible. To dismantle metal structures at the facility, a mask is preferred, but only closed so that the leders of the circle does not fly under it, and reinforced to hold the flying fragments of the circle when it destroyed it. Minus mask. She, bitch, fogs. But if you wear a respirator, which is important with daily work, fogging practically does not occur a mask for mowing grass cannot be used. It is open from below, and does not protect sparks from a ricochet, but on the contrary, catches them and makes them ricocheted again in the face. And yes, with daily work with a corner grinder, you need to use headphones or bears, otherwise you are provided with a rapid decrease in hearing.

Where should the Corner grinding disk rotate

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?

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.
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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.

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:

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 dispersal 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.

How to repoint old brickwork

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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