Unscrews the nut on the angle grinder during operation

14th March 2020

Bit the disk onto the angle grinder. The nut is not loosened. How to unscrew the disk nut onto the angle grinder (angle grinder) if it is jammed?

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Bit the disk onto the angle grinder. The nut is not loosened. How to unscrew the disk nut onto the angle grinder (angle grinder) if it is jammed?

How to unscrew a disk (nut) on an angle grinder, if it bites, pinches, does not unscrew # 128249;

Angle grinder, or as it is called more popularly and popularly, angle grinder, nowadays an indispensable and very useful tool. Without him, neither there nor here! And if it suddenly fails, then you have to dodge in every possible way, look for alternatives and think about restoring the tool. At the same time, it is impossible to use the angle grinder for its intended purpose due to a kind of simple lining when the disc is not unscrewed. Rather, the nut that holds this disk is not unscrewed. Here you can “break firewood”, namely bend or break the key, damage the lock button, break the case, but never unscrew the ill-fated nut. So, we will immediately warn you, if it’s not too late. If you suddenly do not unscrew the nut holding the disc with a key, then you need to change the tactics. And it is precisely the cardinal way of unscrewing that our article will be devoted.

Why bites the nut on the angle grinder that holds the disc

I will say, perhaps, a well-known truth. Bites nuts more often on angle grinders with a significant disk size, say 150-180 mm or more. The thing is that the resulting torque, in the case of a disk impact at the moment of cutting start, is much larger than for a disk, say 125 mm. As a result, the nut inertia tightens so much that it is very difficult to break it off by ordinary and familiar methods. Now about the special ways.

How to unscrew a disk nut an angular grinder (angular grinder) if it bit

So, if there is no way with a key, even if you insert it and slightly hit with a hammer, then we begin to use something more serious.

The first thing you can try, but again without fanaticism, is to take the rod, insert it into the holes on the nut and using a hammer, slide the nut in the direction of its unwinding. The main thing here is not to break the button and not tear openings, as here

The second thing that many people advise is to warm the nut. Warm up the nut. In the end, it is a little, but physically still obliged to expand. Resizing may or may not help.

You do not have to pull it to the extreme until the stopper of the hold button from scrolling or the button itself bursts. In this case, it is not the tool with which you unscrew that breaks, but often the body is the angle grinder.

The third method is the most effective, and oddly enough, one of the safest for the angle grinder itself.We take off the edges of the disk on the nut.

Unscrews the nut on the angle grinder during operation

Next, we use a thin metal plate or another disk (thinner), and maybe a second angle grinder with a disk. In this case, a broken disk must be turned either by a plate or by a disk. We try to sharpen the disk so as not to damage the nuts holding this disk, because they will still be useful to us. So we sharpen the whole broken circle until we sharpen it and the nut is unscrewed.

This is a matter of 4-5 minutes, no more.

If you will use a second disk or metal plate, it is best to insert them to hold in a vice. Since holding such objects with your hands is dangerous. This method is the most effective!

How to make sure that the nut with the disc does not bite on the angle grinder

And a few words about the prevention of such unpleasant precedents again. You can use small cardboard gaskets by inserting them between the disk and the nut. In extreme cases, use a smaller diameter disc, unless of course the nut is twisted on top. As a result, it will be possible to unscrew such a nut without problems. She will not be clamped, but she will bite on the thread.

And another small on a topic about a problem that I studied from my own experience.

How to unscrew the nut on the angle grinder with a jammed disk

The angle grinder is a multifunctional but whimsical tool that does not endure haste and negligence. Failures and malfunctions are the result of careless handling or safety violations. And the most common problem when working with an angle grinder is jamming of an abrasive tool between the support flange and the clamping nut. How to unscrew the disk on the angle grinder without damaging the parts and the tool itself?

Using an open-end wrench and socket head

Cut the working surface of the key by 17 to 4 mm in thickness. On the surface of the 24 mm face head, grind 4 tabs so that they fall into the holes of the flange.

The spanner must be placed under the disc. Insert the angle grinder on the nut with the socket and turn it with a ratchet in the direction of rotation of the circle.

Warming up

The pressure nut must be heated with a hot air gun or gas burner to make the metal more malleable. Then unscrew it with a universal key or hands. But the risk of this method lies in the fact that it is possible to spoil plastic parts and gear elements.

With a gas key

When using the gas key, the shoulder increases, therefore, the moment of force increases. With this tool, it is easier to unwind jammed joints. But if you try too hard, you risk crushing the flange or breaking the spindle rotation lock.

Using a hammer drill in jackhammer mode

The hammer must be switched to the slotting mode without rotation. A 6 mm drill must be placed on the end of the flange or abut against the edge of the hole. The task is to unscrew the nut, move it from its place. After that, unscrew it with your hands or a key. During operation, the spindle rotation must be blocked.

Disk destruction

Before you unscrew the nut on the angle grinder, you will have to completely crush the disk. If it is already destroyed, you can break it with your hands. Whole circles can be cut with a hacksaw or metal blade. From the abrasive wheel should remain the inner metal ring and pieces that are not amenable to mechanical stress. Then you need to pinch a metal profile or any unnecessary plate, the thickness of which is less than or equal to the thickness of the disk (but not more). Then turn on the angle grinder and grind the remaining abrasive to the landing sleeve. After that, the flange can be easily unscrewed with a universal key for an angle grinder.

You can take care in advance that the tool does not jam in the angle grinder:

Cut the washers out of cardboard or plastic and place one under the disk, and the second between the disk and the flange. Even if the circle sticks, when heated, the plastic washer will melt;
The face of the abrasive tool that is marked with the label must be in contact with the support flange and not with the clamping nut. The metal ring of the circle with such an installation acts as a washer and protects against jamming;
Weld a standard hex nut on the flange and unscrew it with a regular wrench;
If possible, the angle grinder wrench should only be used to loosen the clamping nut. When installing a new tool, it is better to tighten it manually or at least control the tightening force.

How to Unscrew an Angle Grinder If Bitten

How unscrew the disk (nut) on the angle grinder, if bit, clamped, does not unscrew # 128249;

Angle grinder as it is also called as it is called more popularly and popularly angle grinder, today an irreplaceable and very necessary tool. Without him, neither there nor here! Provided it suddenly fails, then you have to dodge in every possible way, find candidates and think about restoring the tool. With all this, you cannot use an angle grinder for its intended purpose because of a kind of usual lining when the disc is not unscrewed. Precisely not unscrews the nut, which holds This common rumor drive. Here you can “break firewood”, and specifically bend or break the key, destroy the lock button, break the case, but unscrew that unfortunate nut. So, we immediately warn you, if it’s not too late. If you don’t have unscrews the nut holding the disk with the key, then you need to change the strategy. Just the cardinal method of unscrewing will be devoted to our article.

Why bites a nut on an angle grinder, which holds disk

I will tell you, perhaps, the completely known truth. He bites nuts more often on angle grinders with a disk size of a significant size, say 150-180 mm or more. It remains for our client that the resulting torque, if the passage of the impact of the disk at the time of the start of cutting, is substantially more than simple than for a disk, say 125 mm. Ultimately, the nut automatically tightens so much that it is very difficult to break it off with ordinary and ordinary methods. Now about the special methods.

How unscrew disc nut angle grinder (angle grinder) if it is bitten

What is needed if there is no way with a key, even if you stick it in and slightly hammer it, then we begin to use something more severe.

The first thing that you can experience, alas, without fanaticism, is to take the rod, insert it into the holes on the nut and use a hammer to move the nut in the direction of its unwinding. The main thing here is not to break the button, not to rip open the holes, as here

Clamped a disc in an angle grinder. How unscrew no problem!

On the development of the channel.

How easy unscrew jammed disc on an angle grinder.

A series ofs is dedicated to working with manual electrical equipment, specifically speaking with Angle Grinder. This is about that.

The second thing that many people advise is to warm the nut. Warm up the nut. In the end, it is a little, but physically still obliged to expand. Resizing may or may not help.

The third method is the most effective, and oddly enough, one of the safest for the angle grinder itself.We take off the edges of the disk on the nut.

This is a matter of 4-5 minutes, no more.

If you will use a second disk or metal plate, it is best to insert them to hold in a vice. Since holding such objects with your hands is dangerous. This method is the most effective!

How to make sure that the nut with the disc does not bite on the angle grinder

And a few words about the prevention of such unpleasant precedents again. You can use small cardboard gaskets by inserting them between the disk and the nut. In extreme cases, use a smaller diameter disc, unless of course the nut is twisted on top. Eventually, unscrew such a nut can be no problem. It will not be clamped; it will not bite on the thread.

And another small on a topic about a problem that I studied from my own experience.

Do-it-yourself easy way to unscrew the angle grinder nut

Quite a common problem for those who use the angle grinder, the angle grinder, the cutting disc broke and tightly clamped the clamping nut. And the most interesting thing is that sometimes it is almost impossible to unscrew the nut either with a special key, an angle grinder, gas or anything else. And if you manage to do it, then it takes tremendous effort and time spent. I will show you a simple way to save your time and effort so that you can unscrew this nut with an angle grinder without unnecessary difficulties.

A simple way to unscrew the nut. Angle grinder. Angle grinder.

To unscrew the nut, first of all, it is necessary to break the remains of the broken cutting disc under the root.This can be done very simply with pliers. Do not forget about the protective equipment: glasses and gloves, as various small splinter flies.The result should be this:Now we need to find a piece of metal that will be thinner than the disk by an angle grinder.We turn on the angle grinder and with this piece we grind the rest of the disk between the nuts.After everything has been machined inside, the nut is unscrewed not only with a key, but even with your hands. Here is such a very simple and very fast way. In addition, the angle grinder is safe for bearings, because if the nut does not loosen, most people take a hammer in their hand and start trying to unscrew the nut with tapping.

What to do to prevent this from happening again?

In order to no longer fall into this situation, you can put a plastic, paper or cardboard washer under the nut before clamping a new disk. And in this case, the nut can always be unscrewed without problems.Cutting stones or wheels are not always able to find the proper quality and therefore their fracture is becoming a frequent problem. Of course, the human factor of improper exploitation is not excluded. But now, if you are in a similar story, you know what to do. See you soon!

Watch the

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How to remove a jammed disc from an angle grinder

This simple operation sometimes baffles even experienced locksmiths or users of an angle grinder. The reason is that the disk is fixed with a special nut. There are 2 or 4 holes on the nut into which a special key is inserted. This key has always been attached when purchasing an angle grinder. Perhaps he is now included in the kits.

According to the instructions for the angle grinder, press the lock, which is located on the back of the gearbox. When the shaft is locked, use a special key to unscrew the nut and change the disc. But it is difficult to loosen the nut if it is not jammed. And it clamps it with such a nut almost always. Attempting to unscrew the drive breaks the latch behind the gearbox.

What way out of the problem is suggested by experts and amateurs

Install a newspaper gasket under the nut;
Install a gasket from a plastic bottle under the nut;
Replace the nut with a nut of a different design.

What is a gasket from a newspaper. This is a paper washer on the size of a nut. It is put on the installed disk, and a nut is screwed on top. This piece of paper was a stumbling block, because the safety inspectorate always broadcast the dangers of such a decision.

In the same way, representatives of safety authorities apply to the installation of gaskets from any other materials:

Cardboard;
Paronitis
Gaskets made of various plastics;
Rubber gaskets of various thicknesses.

Unscrews the nut on the angle grinder during operation

But there is a solution that does not contradict the safety requirements, and allows you to properly install and remove the disk. This is a special nut, which consists of two elements. A nut and a pressure washer. The use of such a nut does not require any linings, because the disc does not jam with it.

If there is no special key at hand, then the craftsmen offer to do without a key. This does not mean that you can do without a key at all, but use a “gas key” or other device. To do this, hold down the lock, tighten the nut with a gas wrench and unscrew it. So you can replace a jammed disk, but this is a very inconvenient operation for one person.

There are suggestions to hold the disc by hand and unscrew. Maybe, but it’s unlikely that it will be possible to change broken wheels. It is better to use keys that are designed to remove and install disks.

Some foreign manufacturers of power tools, such as Bosh, produce an angle grinder with easy-to-remove nuts. They reliably fix a disk on a tool shaft, are easily and quickly removed to replace a disk.

How to remove a bitten disc from an angle grinder

The use of new nuts solves the problems of removing the disc, but what to do with the already-pressed disc? Even if the disk was installed correctly, it is not always possible to remove it. Practice suggests different ways to solve the problem. You can clamp the latch and hit through the extension on the nut holes in the direction of unwinding. This option is only possible with a working latch. But the latch may not withstand such a solution to the problem and break.

The second method is more logical. Under the clamping nut and the lower support washer, there is a gear shaft with grooved chamfers. They put on the lower thrust washer. A standard wrench cannot be installed there. Very narrow. But you can take the usual open-end wrench at “17” and grind it on both sides.

The turned key will enter the gap, install on the chamfers of the shaft and fix it. Now, with any wrench, any nut will be unscrewed, and the disk or its remnants removed from the angle grinder.

How to put the disk on the angle grinder

Grinding discs have different diameters, different thicknesses and different purposes. Some are made for metal processing, others process ceramics, and others work on wood.

A disc of such a size that will not exceed the dimensions of the protective casing must be installed on the angle grinder. The size of the installed disk is indicated in the instructions and on the marking table angle grinder.

The thickness of the disk is selected according to the technological parameters of the processed material. All discs (grinding wheels) have their own classification. Disc shape, abrasiveness of the material, graininess, hardness, accuracy class and imbalance class are classified. It is the latter value that is responsible for the fact that some discs begin to beat during operation.

The grinding wheel has front and back sides. The front side is the one on which the manufacturer’s marking and corporate drawing is applied. When installing on an angle grinder, the front side should be located on top.

Install the disk in this way. So that during operation, sparks with particles of the processed material fly towards the worker. This is a safety issue. If the angle grinder breaks out of hands, then it will not fly towards the worker.

Therefore, to work with an angle grinder, it is necessary to wear protective clothing or a tight apron. The eyes and exposed parts of the face must be protected with a mask or at least safety glasses.

How to unscrew a disc on an angle grinder. Novaso

Jammed nut on the angle grinder (angle grinder) this is a fairly common problem that each solves in his own way, but the fact that this annoying (albeit logical!) misunderstanding takes a lot of time and effort is for sure.

First, determine the direction of rotation of the disk, because the nut will need to be unscrewed in exactly the same direction. If we climbed onto the Internet, it means using the fixed key, it did not work to unscrew the nut. It is either broken or bent.

There are some ways to loosen a jammed nut on an angle grinder.

Method 1 A gas wrench with good sponges, The flange nut on the angle grinder is pretty narrow, and the grip is pretty good. Often, the nut can be unscrewed in this way, but it is not worth the big effort. You can break the lock button (if it is still intact!), Its design is designed to exert the effort possible when using only a stationary key.

Method 2 If the lock button on the angle grinder is already broken you will have to remove the gearbox cover. These are three or four bolts under the disk. The disk usually breaks off to the nuts. The cover is unscrewed, the gear is removed from the gearbox and clamped between the aluminum jaws into the gears and the nut is unscrewed using the methods indicated here.
Method 3. A drill is clamped into the perforator, only the chiselling mode is set (without rotation), and an effort is made to loosen the nut (to the edge of the nut or to the hole for the key pin).
Method 4 The nut is heated by a hot air gun (gas torch, blowtorch) and it is unscrewed much easier, with the same stationary key or gas.
Method 5. If the disk is broken off, you need to remove its remains with pliers to the very radius of the nuts (well, or break a whole disk if not ZhAL-KO) Press the sheet metal into the yews with a thickness equal to the thickness of the disk or slightly less. Turn on the angle grinder and literally “exude” the disk on the edge of the iron clamped in the yews. When the remnants of the abrasive disk between the washers are sharpened with a diameter less than the diameter of the clamped planes, the nut will also loosen by hand.
Method 6. This method is the same as No. 5 only instead of a piece of metal, in yew clamped to the same abrasive disc. The process is faster, but you need to be careful so as not to spoil the geometry of the nuts clamped in yews on a fixed disk. Otherwise, then you have to cut the plane.

Well, now let’s try to protect ourselves from future unnecessary gestures by loosening a jammed nut and possible damage to the tool.

I advise you to tighten the disk nut almost no effort on the fixed key. During rotation, the nut tightens itself as much as needed to hold the disc.
After the nut is unscrewed, a regular nut can be welded onto the flange with faces for a spanner (which one to choose depends on the diameter of the shaft thread)

Do not neglect the installation of cardboard gaskets under the nut of the angle grinder, this reduces jamming.
After the cardboard pads supplied with the angle grinder end, it is possible to cut gaskets out of thin kapron (old plastic canisters) In case of jamming it can simply be melted conventional burner or blowtorch and the nut will loosen by hand.
And finally, one more basic advice, I thought that I knew everything, but as it turns out, no. All discs have glued paper on one side with characteristics of abrasive fraction and purpose. On the same side (on the paper side), the inner disc washer has a wide ring. So here place the abrasive disc with this “paper” side to the gearbox.A wide washer on this side prevents biting., and when unscrewing, the disk will slide along the fixed (inner flange) making it easier to loosen the nut. Since the manufacturer does it (photo).

Everyone who worked with this power tool. An angle grinder, must have encountered the problem of a jammed nut, which is used to tighten the abrasive disc. Usually this happens during operation, at the moment when the disk clamps in the part, it stops or collapses, and the engine, the angle grinder is still rotating, tightens the nut tightly.

In the future, you have to be wise, since the nut with a standard wrench is practically unscrewed. They solve the problem in different ways, everyone has their own methods and secrets, let’s share. I will share the first, reliable and simple way to unscrew a jammed disk on an angle grinder.
First you need to decide which way to unscrew, depending on the setting, the angle grinder for cutting from yourself or yourself, the definition of clockwise and counterclockwise is not suitable. It is easier to remember that the nut should be unscrewed in the direction of rotation of the disk!

Well, the method itself, for this you need a gas wrench and holding a nut with it. We turn it off.

You need to know that sometimes without calculating the strength, you can break the stopper that blocks the disk.
To avoid this, you will need 2 gas keys or clamps, break the rest of the disc, and with one key hold the washer located behind the disc, with the other unscrew the nut.There is another way, but this is probably for the most difficult cases: to lock the disk with a button and putting the hammer in the desired direction on the nut, it will turn on in shock mode. The hammer will hit and thereby unscrew the nut.
I recommend that before tightening the nut, put a paper gasket under it, although not necessarily paper, for example, from tin. With it, there is less chance that after jamming the disk, the nut will jam, or rather, it will not wedge, but will be greatly tightened.

Manufacturers, for example, interskol, complete their angle grinder with similar gaskets.

But of course, the acquisition of a compound nut will help to permanently get rid of the problem discussed in this topic.
You just need to heat the nut a little with gas welding and it will unscrew by hand. You just need to heat a little nut with the gas welding and it will unscrew by hand.Thank you, I will take note of the ways. I myself faced this problem, the circle in the angle grinder was clamped so that it flew to the side, and the disk broke into pieces. As I did not try to unscrew, it did not work. And the key broke the button, and in the end he sawed a nut with a hacksaw. After just bought a new nut. I confess after that incident I became afraid of this dope machine.
A large angle grinder (230 circle) flew off more than once, once even on the fly I cut my wire in flight. # 128578;
After he turned the direction, sparks on himself, although you can burn your pants, but it’s safer if it flies only from me. To admit in this direction of rotation of the disk, I have never flown away.
Absolutely right. A trick on the metal. Only it was necessary not to cut off the nut, but the rest of the jammed circle. This has happened to me. This method prompted me to one good master. And I checked it personally. The only absolutely safe way to remove the remains of a jammed circle is to slowly cut it out with a hacksaw. This procedure can take more than an hour of work and several (depending on their quality) canvases. But then you are not risking anything. All other methods are fraught with damage to the angle grinder, and even if it is under warranty, you will not be able to return anything.
There is still not a bad way. Personally applied and everything worked out !! Sprinkle VD-40, wait 5 min and unscrew with a key. Helped me (but put in a lot of effort!
It’s interesting, and if you immediately lubricate the thread when tightening, can it be possible to unscrew it without effort?
No need to be smart. Everything is done quickly and easily. Break the disk, take a bayonet spade or sheet of iron, turn on the angle grinder and grind the rest of the disk on the edge of the shovel or iron. Work for three minutes.If a disk with teeth that you don’t want to break is stuck in an angle grinder, you need to carefully drive the teeth of the disk into a piece of wood, ideally a tree stump. Then lengthening the handle of the key with a pipe of suitable diameter, take the nut for a jerk. The disc in the angle grinder is immobilized, and lengthening the lever even by 20-30 cm increases your strength at times.
The most reliable and simple thing is to take the steel tape remains after unfastening all kinds of boxes there, etc. And cut out the rest of the circle, success is 100%, it glows to red but the effect is what you need and is safe, you only need to move along the tape as you sample. Key in the light unscrews!
Spray and unscrew the wedeshka.
The disk is broken off by hand, and the inside is sawn off with a universal tool with a vibrating semicircle. It all takes 5 minutes!
Thanks for answers! I took the advice about metal sheet! He clamped the vise and turned on the angle grinder and sawed the blade for 3 minutes and it was done.
The easy way. Take the metal strip and saw the disk to the end. Disc remains between washers. Unscrew by hand. It’s much harder to remove a diamond blade.
They often ask and if you are interested in this topic, you probably also encountered this problem, for which reason, when working with an angle grinder, it clamps a circle into parts and, accordingly, a nut.

I’ll try to explain with an example why it happens and how to avoid it.

How to change a disk for a keyless angle grinder?

Method 1 Use the gas key. Use a pipe wrench to grasp the nut and carefully unscrew it, without applying much effort. Disadvantage: you can crush the nut, break the rotation lock.

Method 2 To make a homemade key for an angle grinder. To do this, you need a long nail (at least 100 mm). It is necessary to cut off the hat, the point and give the nail a U-shaped. It should be bent so that the racks of the “tool” fall into the holes of the flange. If the nut is tightened tightly, insert any metal bar between the nail posts and, holding both hands, rotate the structure in the direction of the circle movement. At this time, press and hold the spindle lock button. The method is safe, but it takes time and additional tools. A hacksaw, a vice, a hammer.

Method 3 Tapping with a chisel. Before changing the disc, you can treat the spindle shaft with WD-40 fluid and wait at least 15 minutes. Then put the tip of a thin chisel at an angle to the hole in the flange nut and gently tap the entire surface of the hole with a metal hammer. Sooner or later, thanks to light tapping, the nut will be loose and it will be possible to unscrew it manually. The disadvantage of this method is that you can damage the holes and spoil the flange.

Method 4 Heat the nut. If it is difficult to unscrew the nut of the angle grinder by hand, you can heat it a bit with a gas burner or autogenous. Unscrew the flange with gloves so as not to burn yourself. This is the most risky of the proposed methods. It is possible to overheat bearings and oil in the gear of an angle grinder.

Finally, I want to mention A few important points regarding replacing a disc with an angle grinder.

On the angle grinder you need to install circles of a suitable size. It is necessary to strictly observe safety precautions and in no case to remove the protective cover in order to install a larger diameter disk. When choosing a disk, you need to consider the model of a power tool, its power, spindle speed.
Due to the disk rotating at high speed, an angle grinder is formed on the protective casing. Therefore, when changing the disc, remove and clean the casing.
Some grinder models have washers to prevent the disc from jamming between the flanges. At least the support flange can be equipped with a rubber washer. Instead of factory fasteners, gaskets can be cut out of cardboard, rubber or plastic. It is necessary to use 2 gaskets: between the support flange and the disk, between the disk and the nut.
Do not forget: if the circle rotates clockwise, then the nut is also unscrewed clockwise and twisted counterclockwise.
If you do not want to buy a new key, install the Bosch keyless nut on the angle grinder. It can easily be unscrewed by hand.

The main thing is that when changing a disk to an angle grinder, do not violate safety precautions and perform all manipulations with the tool turned off from the mains.

We take two boards from thick plywood, chipboard or a thicker tree, and fasten with screws. For clarity, I drew a circle so as not to get into the disk. The boards hold the disk so well that it is not difficult to unscrew the nut with the standard wrench, hammer or gas wrench without damaging anything.

The method is suitable for a circular saw. It does not have a stopper, like an angle grinder, so it is difficult to tighten the screw strongly. The clamping screw has the property of loosening during operation, which leads to a stop of the saw blade and severe wear of the seat. After some time, wear reaches its maximum size and because of this you have to buy a new circular. Obviously, this is due to the heating of the disk during operation. I solved the problem of loosening the screw by installing a heat-resistant paronite gasket on the saw blade and tightening the screw, locking the disk with the help of planks.

Next is another method that will help unscrew the nut of an angle grinder.
Video: Victor Do It Yourself.

I broke the disk using pliers. Its thickness is 1.6. He was clamped into an angle grinder. He took a thin tin and turned on the angle grinder. He put a tin between the nut and pounded it. Used also the old broken disk. Its thickness is 1 mm. Broken 1.6. The old disk also stuck between the nuts and sawed.

I must say right away, do not rush into the choice of methods and means for unscrewing! Try the following.

If the disk breaks off in the cut during operation from biting, then almost always tightens the nut tightly. Putting on the stopper (pressing the button on the gearbox side opposite the disk), try to unscrew it with a standard wrench with moderate force, if the nut does not go, then you do not need to hammer it. In general, “impact work methods” are better not to use an angle grinder when loosening the nut. Gearbox elements An angle grinder is just fine for a chisel and a hammer. You can break the stopper, break the standard wrench, ditch the bearings on the gears, bend the shaft, or even crack or make a crack in the duralumin gear case. All these charms do not lift the mood. Yes, the effort that a regular key is designed for is correlated by the manufacturer with the power of the lock, which is why armed with a gas wrench No. 3 (for example), we have another problem. A broken lock.

It is well known that screw connections weaken their tightening when heated, and the flange nut on the grinder is no exception. You can heat the nut with a conventional gas burner.

And try to unscrew the same regular key.

If there is no burner at hand, the nut can also be heated with the engine of the angle grinder itself. This is done both with a partially broken disk, and when the rest of the disk is on a par with the nuts and only its central part is sandwiched between the nuts. We squeeze a block of solid wood into a yew (so as not to “crawl”) Turn on the angle grinder and rest the edge of the movable nut on the block. Moderately press the nut to the bar. Logically, the nut will begin to heat up due to friction. Smoke is not excluded, but you can heat it without using any heating devices and unscrew it.

The method helps to simply press the angle grinder to the floor, with the disc up. Grind the remnants of the disc to the edges of the nuts, applying the metal flat, and then grind the remnants of the disc out from under the nuts with a sheet of sheet thickness less than the disc.

There is an even more humane way: take a bicycle spoke to sharpen it, bend it with a hook, wrap the other end with a handle (to make it comfortable for your hand) and just sit and gouge out the rest of the disk. This also gives results. It will not take long to bathe. The width of the clamping part of the nut is about 7-10 mm. From the outer edge.

P.S. In the end, I would like to advise my example. I cut a washer from an old kapron canister (you can make several of them at once) according to the size of a clamping nut, 1-1.5 mm thick. I glued it to two drops of glue on the working surface of the nut (so that it would not get lost) and forgot that there was such a problem with loosening. When biting the disc and tightening. You can simply heat a nut with a good AL-KOI or a torch from a folded newspaper, melt the polyethylene and unscrew it evenly by hand (it is better to wear hot gloves!)

How to unscrew a disk nut on an angle grinder (angle grinder) if it is stuck?

In this case, you can try to unscrew the nut by using the gas key as an assistant. You can also resort to heating and further loosening. But look, that in the first case with a gas key it is necessary to do everything carefully, not too much, since such efforts can contribute to the breakdown of the lock. And in the second case, the heating should also not be too strong so that it could not affect the plastic parts.

Well, yes, so much torment due to some jammed nut. A beard and a hammer are always at hand. He inserted into the key hole and gasped sharply. Since ancient times, the reception works and does not fail. Well, if hands grow from there, then you can handle any piece of iron at hand.

You heat this nut with a gadget, and unscrew it all simply and easily and do not spoil anything.

First, determine the direction of rotation of the disk, because the nut will need to be unscrewed in exactly the same direction. If we went online, it means using the fixed key, it was not possible to unscrew the nut either it was broken or bent.

There are some ways to loosen a jammed nut on an angle grinder.

Method 1 A gas wrench with good sponges, The flange nut on the angle grinder is pretty narrow, and the grip is pretty good. Often the nut can be unscrewed this way, but it’s not worth the big effort; you can break the lock button (if it’s still intact!), Its design is designed to exert the effort possible when using only a stationary key.

Method 2 If the lock button on the angle grinder is already broken you will have to remove the gearbox cover; this is three or four bolts under the disk. The disk usually breaks off to the nuts. The cover is unscrewed, the gear is removed from the gearbox and clamped between the aluminum jaws into the gears and the nut is unscrewed using the methods indicated here.
Method 3. A drill is clamped into the perforator, only the chiselling mode is set (without rotation), and an effort is made to loosen the nut (to the edge of the nut or to the hole for the key pin).
Method 4 The nut is heated by a hot air gun (gas torch, blowtorch) and it is unscrewed much easier, with the same stationary key or gas.
Method 5. If the disk is broken off, you need to remove its remains with pliers to the very radius of the nuts (well, or break a whole disk if not ZhAL-KO) Press the sheet metal into the yews with a thickness equal to the thickness of the disk or slightly less. Turn on the angle grinder and literally exude a disk on the edge of iron clamped in yews. When the remnants of the abrasive disk between the washers are sharpened with a diameter less than the diameter of the clamped planes, the nut will also loosen by hand.
Method 6. This method is the same as 5 only instead of a piece of metal, in yew clamped to the same abrasive disc the process is faster, but you need to be careful so as not to spoil the geometry of the nuts clamped in yews on a fixed disk. Otherwise, then you have to cut the plane.

Well, now let’s try to protect ourselves from future unnecessary gestures by loosening a jammed nut and possible damage to the tool.

I advise you to tighten the disk nut almost no effort on the fixed key during rotation, the nut tightens itself as much as needed to hold the disc.
After the nut is unscrewed, a regular nut can be welded onto the flange with faces for a spanner (which one to choose depends on the diameter of the shaft thread)

Do not neglect the installation of cardboard gaskets under the nut of the angle grinder, this reduces jamming.
After the cardboard pads supplied with the angle grinder end, it is possible to cut gaskets out of thin kapron (old plastic canisters) In case of jamming it can simply be melted conventional burner or blowtorch and the nut will loosen by hand.
And finally, one more basic advice, I thought that I knew everything, but as it turns out, no. All discs have glued paper on one side with characteristics of abrasive fraction and purpose. On the same side (on the paper side), the inner disc washer has a wide ring. So here Place the abrasive disc on this paper side of the gearbox.A wide washer on this side prevents biting., and when unscrewing, the disk will slide along the fixed (inner flange) making it easier to loosen the nut. Since the manufacturer does it (photo).

You can try to unscrew the nut in several ways. As a rule, there is a slot for a simple key on the gearbox shaft. Do not neglect it, otherwise it is easy to break the stopper. Holding the shaft (the wrench should be slightly thinner than the standard one), try to unscrew the nut with a gas wrench. It will not work. Do not despair, you can try to warm the nut, but it is worth considering that there are plastic parts nearby. Heating requires accuracy.

The most effective and most affordable method is a sharp hit on the nut in the direction of unscrewing. Holding the shaft, insert a thread (for example, a blunt chisel) into the key hole and, with a sharp blow, tear the nut out of place. Further simpler.

For the future. Put the disk on cardboard gaskets, then the wedge will become a rare guest.

Main Applications Angle Grinder

Cleaning surfaces, peeling old paint. It is carried out by brushes with steel bars or petals of sandpaper. No difficulties in work, except that the sandpaper brushes require compliance with the direction of rotation.
Sanding with sandpaper. A concentric nozzle with Velcro is screwed onto the angle grinder, on which the abrasive is in turn attached. Before use, the direction of the threaded fastening and the rotation of the tool shaft are checked.
Grinding with abrasive wheels. These nozzles require careful handling, since under high load, the abrasive may break. It is impossible to cut off material with such disks; shock loads are unacceptable.
Cutting of metals, stone, gating concrete. Performed by cutting discs.

It is with such nozzles that emergency situations most often occur.

At the cutting wheels dwell more

The question of which side to put the disc on the angle grinder does not have the correct answer. Abrasive wheels do not have a programmed rotation direction, so it doesn’t matter how you install it. The direction, rotation (away from yourself or towards yourself), is determined by the position of the protective casing. The choice depends on the position of the tool convenient for the operator.In addition, the direction of flow of sparks (or stone dust) depends on the position of the casing.

For mounting the disc on the shaft, a collapsible flange is included. The lower part is rigidly fixed with chamfers, the upper part is a regular self-tightening nut. It is she who determines which way the disk should rotate to the angle grinder. During operation, the threaded connection is tightened, preventing the nozzle from coming off.Sometimes washers are included in the kit for damping transverse vibrations. They can be made independently from a dense electrocardboard or paronite.To fix the flange, a special open-end wrench is attached to the tool. The shaft is secured by a clamping button to create the necessary force when tightening.

Ignorance of a simple question: how to properly install the disk, for inexperienced users can lead to damage to equipment or personal injury. First of all, when changing the disc, it is necessary to clean the shaft and the inner surface of the protective casing with a steel brush.

A layer of metal particles is riveted onto these elements (when cutting the material). Thickness can reach several millimeters, as a result of which the disc loses its alignment or jam.

Large nozzles do not just overload the electric motor. Installation requires removal of the protective cover. If the angle grinder disintegrates and the guard is not installed, fragments can seriously injure the operator.

Another debatable question is whether it is possible to put a disk on a tree on an angle grinder. If you hold the tool with your hands, an unequivocal answer is impossible. The circular can easily jam in the fibrous structure of the tree. An instrument escaped from the hands will cause many troubles, including fatal injuries.

What to do if you have lost the open-end wrench?

Precisely, how to unscrew the disk on the angle grinder without a key? There are three ways:

Make a bracket from a rod of suitable diameter (a nail will do). With this device, the flange can be loosened by hand. If the tightening is too strong, insert the lever into the bracket.
Use the gas key. Grasping the outer radius of the threaded flange, it is enough to drop the nut, and then it will unscrew by hand.
Touch the thread with exact tangent strokes. To do this, you can take a core or punch, install it in the hole for an open-end wrench, and with light hammer blows, turn the flange.

All manipulations to change the nozzle are carried out after disconnecting the power cord.

Remove a split disk

There are times when the cutting wheel is jammed during operation. Not only have you lost the nozzle, in such a situation the flange (its threaded part) is clamped with repeated force. How to remove a disk from an angle grinder in such a situation?

First of all, the tool should be securely fastened. Use clamps and a solid workbench. Then you need to lock the shaft lock key. If the efforts of the hands are insufficient, extend the handle of the open-end wrench: for example, with a piece of steel pipe.

There are times when the flange is jammed “tightly”. Then there is a chance of damage to the lock key. To save the tool, you should disassemble the gearbox, and clamp the output shaft in a vice.

After that, we continue disassembling the above methods: reinforced horn or gas key. The disadvantage of this method is that you can damage the shaft, notches will remain on it.

If the shaft is completely removed from the gearbox, it is possible to fix the chamfers of the lower part of the flange using a traditional key.Then the risk of damage is minimal. With any method, it is recommended to use penetrating lubricant: WD-40 or ordinary kerosene. After several minutes after application, you will significantly reduce the effort.

Total:
Any problem is easier to prevent than deal with the consequences. Observing the rules of operation and the tool, you minimize the possibility of emergency situations.

Source

Angle Grinder grinder, operation, unscrews