How to unscrew a jammed nut on an angle grinder

What are the ways to unscrew the tightened nut on the angle grinder?

angle grinder, or angle grinder is a versatile tool, with which you can perform a wide range of actions. It has a simple mechanism of action, built on the rotation of the shaft of an electric motor. Necessary for cutting metal parts, polishing surfaces and grinding various materials. One of the frequent problems during the operation of the angle grinder is bite in the nut that holds the disc. This does not allow you to replace the nozzle, and with a strong impact can damage its threads, break the wrench or break the housing.

As a rule, such a problem occurs on the angle grinder with a diameter of the working surface in the range of 150-180 mm. When strong torque is encountered, the disc will bite. This means that the bit cannot be removed with a regular wrench, even with hard physical effort.

The second common reason is the use of a disc for the angle grinder that does not match the factory parameters of the tool. This leads to disruption of the entire mechanism and jamming. In rare cases, the nut cannot be unscrewed if there is any rust on the threads. most severe problems are caused by prolonged use or by storing the tool without changing the bit.

Important! Discs for angle grinders are available in standard sizes, with diameters ranging from 115 to 230 mm. The drive shaft itself has a diameter of 22.2 mm, but an adapter is required for older models.

How to unscrew if it is tight?

To begin with, we answer the frequent question: “In what direction is the nut unscrewed on the angle grinder?”

Remember! Unscrew in the direction of rotation of the disk. Т.е. if the disk rotates clockwise, then the nut should be unscrewed clockwise as well.

the easiest way to unscrew a wheel nut is to use a wrench and then swing the hammer several times with medium force.

If that doesn’t work, there are alternative methods of solving the problem:

  • Heat the fastener mechanism with a torch, which will cause the metal to expand. As a result, the structure will become movable;
  • Grind the disk all the way down to the nut with a small metal plate. Continue to grind until its surface makes contact with the nut and begins to twist it;
  • Insert a steel tube in the holes of the nut and use it as leverage to unscrew the nut that is tightened. Do not apply too much force so as not to break the thread;
  • Lubricate the threads with machine oil, e.g. WD-40. wait for 3-5 minutes and then try to unscrew the fastener with the spanner. With this method, you can also get rid of rust inside the seating shaft;
  • if you need to remove a wheel that has not been used for a long time, you can start screwing the fastener even harder. After that, try to loosen it again;
  • a boiled or corroded thread on the angle grinder can be treated with turpentine, vinegar, white spirit or rust remover. After treatment, you need to wait at least 30 minutes and then try to unscrew the nut again.

If a situation arises where you are left without a key, you can chisel off the stuck fastener with a chisel or grind it with a second angle grinder with a disk for working on metal. After that, you will have to restore the threads, and look for a spare nut. If the circle still does not yield, you can try a combination of different methods. For example, treat the shaft with machine oil, and then start unscrewing the bit with a lever or tap the mechanism with a hammer.

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Important! Do not unscrew the fastener with great force. This can lead not only to tearing off the threads, but also to the breakage of the body itself angled grinder.

What is the reason?

Before you wonder how to remove the disk from the angle grinder, experts recommend to understand why the angle grinder bites the nut. It has been observed that this problem is mainly observed in angle grinders, which have a significant disc size. A disc over 18 cm is considered large. In the course of operation is formed torque. Then, when the master starts cutting, a slight shock occurs. In other words, there is a forceful impact on the disk. If the size of the nozzle is not more than 12 cm, then the impact is insignificant. If the disk is large, then the nut is tightened more by inertia. As a result, it is not possible to remove it in the usual way. For more information on how to remove the disc from the angle grinder, see.

Angle grinders

This is what causes the problem

And so when the process of tightening the flange to fix it is complete, we have an out-of-the-ordinary situation on our face. It will be influenced by such factors:

  • Enormous size of the disc.
  • Very high power of the power tool.
  • The dimensions of the rotor.
  • Sudden increase in cutting depth, t.е. increases the resistance.

In this case, the disc must be removed from the angle grinder, but this can be very difficult to do. Here you will need to take additional measures.

Types of faucet installations: flexible connection

This connection method requires a flexible hose for faucets.

In order to preserve the integrity of the coating of the faucet, it is better to wrap it with electrical tape.

Before you begin connecting the faucet to the pipe, the first thing to do is to shut off both the hot and cold water supply. Next, after unscrewing the clamp nut and fixing screw, you need to remove the old mixer and clean the place of installation. If the mixer does not lend itself to removal, then the junction of the device and the sink must be covered with a special chemical, which after some time will allow you to remove the mixer.

To install the faucet, you screw the supply pipe in the form of two hoses, and also the pin with a thread, on which the faucet will be mounted to the sink. Before putting the faucet in place, you must put an O-ring with a rubber gasket on the hoses. This whole construction is inserted into the corresponding hole in the basin. It is more convenient to work with an assistant, who will hold the mixer from above until it is completely fastened. In order to fix and provide additional sealing of the system, a sealing ring or a special gasket is inserted from below and a clamping washer is placed on the pin. The washer must be tightened firmly, and only then will the mixer hold.

After the faucet has been placed on the basin, the water supply line is connected to the water supply with the help of coupling nuts and adapters. It is important to orient correctly and prevent the hoses from kinking and twisting. Nuts are screwed on first of all by hand, then. using wrenches and in order to secure the connections the sealing tape should be applied. After completing the work it is necessary to check the correctness of hot and cold water connections, as well as the tightness of all connections. If there is a leak, it should be repaired. When you turn on the water for the first time, you need to let it flow for about 5 minutes to make sure that the design does not fail.

Mounting the faucet in a flexible way.

Before unscrewing the problematic hardware, you need to assess its condition and see what tools are available for the task. Manipulation should be performed with great effort, but at the same time it is necessary to take care not to break the nut edges or not to break improvised devices.

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To make the unscrewing of the problematic metal easier, especially when unscrewing a stuck or rusty fastener, it is recommended to apply WD-40 spray lubricant, pour some kerosene or gasoline. After removing rust pour a small amount of machine oil on the work surface.

Preventive measures

A cardboard washer makes it possible to unscrew the nut after any extraordinary situations

This method is simple and convenient, but it is still more convenient not to break anything, and just unscrew. In addition, there are cases where the discs are simply clamped hard. It takes a long time to break the 5 mm abrasive and then to mill it under the nut, that’s why there is a method to avoid the situation when it will be impossible to unscrew the nut with a spanner.

For this you only need to make a washer from cardboard.

The tool is ready for use.

Jammed angle grinder DISCLEAN a tightened nut EASY.Cutting with an angle grinder, angle grinder.Working with an angle grinder

How to unscrew the nut on the angle grinder without a wrench: a simple tiphack

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How to unscrew the nut on the angle grinder if bitten

Tried to stop the button, take a standard wrench and press, hit with a hammer. to no avail.

Took it home, locked the button, tried to use a gas wrench, it won’t go, and that’s it, only scratched the nut. In this case, I remembered how often I heard about cases where the nut on the angle grinder unscrewed with great difficulty.

How to simply unscrew the nut on an angle grinder (angle grinder) if it is jammed

The first thing to do is to break down what’s left of the broken cutting disc.

This is done very simply, you only need to take pliers. At the same time use protective equipment. glasses and gloves, because metal splinters will fly.

The result should be the following:

Next, we find a piece of metal, the thickness of which. less disc angle grinder.

Next, you need to turn on the angle grinder and use this piece to grind the rest of the disk between the nuts.

After everything has been worn out, the nut is unscrewed inside, not even with a wrench, but with your hands.

This is how it is done, very simply and quickly. What. safe for the bearings of the angle grinder. Because if the nut is not unscrewed, many people immediately armed with a hammer and try to unscrew the nut by tapping on it.

What to do to prevent this from happening again

If you do not want to get in such a situation, you can put a washer made of plastic, paper or cardboard under the nut before clamping the new disc. In this case, the nut will unscrew without effort.

Nowadays, it is not often possible to find a cutting stone or disc in good quality, so when they break, it often becomes a problem.

Naturally, it can also be caused by improper use. But now you already know how to unscrew the nut on an angle grinder.

If there are still questions or something you don’t understand, you can look it all up at

How to avoid jamming the nut with the disk on the angle grinder

And a couple of words about preventing such unpleasant precedents again. You can use small spacers from cardboard, inserting them between the disk and the nut. As a last resort, we can use a disc with a smaller diameter, if the nut is screwed on top, of course. In the end, it will be possible to unscrew such a nut without problems. It will not get jammed, it will bite on the thread.

And another little video of the problem, which I have studied in my own experience.

What causes the problem??

It is difficult to encounter this problem when rotating at idle speed. Especially when working with light circles and soft-start tools. However, after the RPM is increased and the surface is in contact with the material to be cut, the following happens:

  • When material resistance is encountered, the wheel has a sharp decrease in angular velocity of rotation, it brakes.
  • The motor continues to run for a few moments at the same speed by inertia, dragging the gearbox and the spindle behind it.
  • The retaining nut is tightened by inertia on the threads of the spindle head, thereby pressing the cutting disc in.
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That’s it, the process of tightening the fixing flange is over. the abnormal situation is in your face. The following factors influence its occurrence:

  • Big wheel size.
  • High tool power.
  • Massiveness of the rotor.
  • A sharp increase in cutting depth, t.е. increased resistance.

In this case, it can be very difficult to remove the disk from the angle grinder. Additional measures have to be taken.

The first way

How to remove the disk from the angle grinder, if it is broken and firmly clamped by the clamping nut? Of course, you can try to use a special wrench for angle grinder or gas. However, judging by the reviews, after making enormous efforts and spending time, the master may not get the expected result. It is easier and faster to disassemble. To do this, you need to break the disc completely with pliers. The craftsman will need protective goggles (mask) and gloves, because small splinters will fly in the course of the work.

Then you need to take a metal plate, the thickness of which is less than the disk. This plate will be used to grind off its remains. To do this, turn on the angle grinder, and the metal piece should be firmly clamped with pliers. After performing these actions, the nut can be unscrewed even by hand.

What to do if the disk is jammed (bitten) on the angle grinder?

Everyone who has experience of intensive work with the angle grinder probably at least once, yes encountered such a situation.

As a rule, this happens if the drive is clamped between the parts, it stops or breaks, and the angle grinder motor continues to rotate and thus finally tightens the nut.

So what can still be done if the disc jammed on the angle grinder?

Each master has his own secrets.Especially for you, we have learned a few of them and at this point we will share the most common methods of getting out of the situation.

remove the disk from the angle grinder

This method involves the use of the well-known VD-40 lubricant.

It is surely like duct tape, applicable in all cases of life.

For you need to spray the flange, wait about 5 minutes and try to unscrew it with a wrench.

How to prevent re-clamping?

To avoid getting into a similar situation in the future, carefully read the following recommendations of experienced craftsmen:

  • When you tighten the nut disk do not need to apply excessive force, pressing the wrench, because at the moment of rotation of the nut will tighten itself to the right level;
  • Before installing the new disk, place a cardboard or plastic washer under the nut; it can be cut from any available material;
  • the side of the abrasive disc with the label affixed should touch the supporting flange, not the nut; if this condition is met, the metal ring of the wheel will protect it from jamming;
  • Weld an ordinary hex nut on the flange that can be unscrewed with a simple wrench.

Cutting stones or angle grinder discs are not always of good quality and the right size. This can lead to a situation where the nut gets jammed. But if you have such an incident, do not despair. The useful advices of experienced masters and your own wit will always help you in a difficult moment and advise what to do in this situation.

To learn how to effortlessly unscrew the nut on an angle grinder, see the video below.