The nut is unscrewed on the angle grinder during operation

How to avoid biting a nut and disc on an angle grinder

And a few words about preventing such unpleasant precedents again. You can use small cardboard spacers by inserting them between the disc and the nut. As a last resort, we use a disc of a smaller diameter, unless, of course, the nut is tightened from above. As a result, it will be possible to unscrew such a nut without any problems. It will not be squeezed, for a bite on the carving.

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

How to unscrew and correctly place a disc on an angle grinder

This simple operation sometimes baffles even experienced locksmiths or users of an angle grinder. The reason is that the disc is fixed with a special nut. The nut has 2 or 4 holes, into which a special key is inserted. This key was always included with the purchase of an angle grinder. Perhaps he is now included in the kits.

According to the instructions for the angle grinder, you must press the lock, which is located on the back of the gearbox. When the shaft is fixed, unscrew the nut with a special wrench and change the disc. But it is difficult to unscrew the nut if it is not clamped. And it clamps it with such a nut almost always. An attempt to unscrew the disc leads to breakage of the retainer behind the gearbox.

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

What is a newspaper strip. This is a nut-sized paper washer. 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 has always broadcast about the harmfulness of such a decision.

The representatives of the safety authorities treat the installation of gaskets made of any other materials in the same way:

  • Cardboard;
  • Paronite;
  • Gaskets from various plastics;
  • Rubber gaskets of various thicknesses.

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

If there is no special key at hand, then the craftsmen offer to do without the 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, clamp the retainer, clamp the nut with a gas wrench and unscrew it. This way you can replace a jammed disc, but this is a very inconvenient operation for one person.

There are also suggestions to clamp the disc with your hand and unscrew it like that. Perhaps, but it is unlikely that it will be possible to replace broken disks. It is better to use keys that are designed to remove and install disks.

How To Remove Stuck NUT Of An Angle Grinder. Very Simple

Some foreign companies producing power tools, such as Bosh, produce angle grinders with easily removable nuts. They securely fix the disc on the tool shaft, easily and quickly removed to replace the disc.

With a gas wrench

The shoulder when using the gas wrench increases, therefore, the moment of force also increases. It is easier to unscrew stuck joints with such a tool. But if you try too hard, you risk crushing the flange or breaking the spindle rotation lock.

With open-end wrench and socket head

Grind the working surface of the 17 key to 4 mm in thickness. On the surface of the 24 mm socket, grind 4 protrusions so that they fall into the holes of the flange.

The open-end wrench must be placed under the disc. Put the socket head on the nut of the angle grinder and turn it with a ratchet in the direction of rotation of the wheel.

A jammed nut: how to unscrew a disc on an angle grinder?

An angle grinder is a multifunctional but capricious tool that does not tolerate haste and negligence. Breakdowns and breakdowns are the result of careless handling or safety violations. And the most common problem when working with an angle grinder is a jam of the abrasive tool between the support flange and the clamping nut. How to unscrew a disc on an angle grinder without damaging parts and the tool itself?

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

I will say, perhaps, a well-known truth. He bites nuts more often on grinders with a disc size of a significant size, say 150-180 mm or more. The thing is that the resulting torque, in the case of a disk impact at the time of the beginning of cutting, is much greater than for a disk, say 125 mm. As a result, the nut is tightened by inertia so much that it is very difficult to break it in the usual and usual ways. Now about the special ways.

READ  How to Mount a Disc on an Angle Grinder

How to unscrew if tightened?

To begin with, let’s answer a common question: “In which direction is the nut unscrewed on an angle grinder?”

Remember! You need to unscrew it in the direction of rotation of the disk. Those. if the disc rotates clockwise, then you need to unscrew the nut clockwise.

The easiest way to unscrew the disc mount is to place the wrench and then hit it several times with a moderate hammer.

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

unscrewed, angle, grinder, operation
  • warm up the fastening mechanism with a torch, which will lead to the expansion of the metal. As a result, the structure will become mobile;
  • use a small metal plate to grind the disc down to the nut itself. Continue grinding until its surface touches the nut and begins to twist it;
  • insert the steel pipe into the holes of the nut, use it as a lever to unscrew the tightened nut. Do not apply too much force so as not to break the thread;
  • lubricate the threads with machine oil such as WD-40. Wait 3-5 minutes and then try unscrewing the mount with a wrench. Using this method, you can get rid of rust inside the landing shaft;
  • if you need to remove a circle that has not been used for a long time, you can start tightening the fasteners even more. After that, try again to weaken it;
  • Boiled or rusted threads on an angle grinder can be treated with turpentine, vinegar, white spirit or rust remover. After processing, you need to wait at least 30 minutes, and then try again to unscrew the nut.

If a situation arises when you are left without a key, you can cut down the stuck mount with a chisel or grind it off with a second angle grinder with a disc for working on metal. After that, you will have to restore the thread, as well as look for a spare nut. If the circle still does not lend itself, you can try to combine different methods. For example, treat the shaft with machine oil, and then start unscrewing the nozzle with a lever or tapping the mechanism with a hammer.

Important! Do not unscrew the mount with great force. This can lead not only to breakage of the thread, but also to breakage of the case itself.

How to unscrew a nut on an angle grinder without a key: a simple life hack

An angle grinder or angle grinder is one of the most traumatic power tools. If used improperly, the cutting disc can jam, and even if everything is okay, after this incident, it is unlikely that it will be possible to unscrew the fixing nut after this incident by standard methods. neither a “native” key, nor a gas key, nor even a chisel with a hammer will help. Since unscrew the nut on an angle grinder?


Unscrew and remove unnecessary remains of the consumable

The obstacle has been removed, you can now unscrew the nut and remove what is left of the cut-off wheel. The nut is easily unscrewed, in most cases it can be done by hand, without the use of tools.

Preventive measures

A cardboard washer will allow you to unscrew the nut after any emergency situations

How to remove jammed blade stuck nut of angle grinder

This method is simple and convenient, but still it is more convenient not to break anything, but simply unscrew it. In addition, there are times when the discs are simply clamped tightly. It takes a long time to break a stripping abrasive with a thickness of 5 mm, and then grind it under the nut, because there is a method that allows you to avoid the situation when it will be impossible to unscrew the nut with a wrench.

To do this, you only need to make a spacer washer from cardboard.

The tool is ready to work.


We break the remains of the cutting disc with pliers. Removing as much as possible.


For the next step, you will need a metal plate that is less thick than the disc. We turn on the angle grinder, and with this plate we grind off the remains of the abrasive, which is located under the fixing nut. Don’t forget about safety precautions.

We remove the cutting disc in a non-standard way

Discs on an angle grinder are fixed with a nut, which is twisted in the same direction in which the spindle of the power tool rotates. And when the rotation stops abruptly, self-tightening of the fixing nut occurs.

In order to unscrew it later, you need an effort that significantly exceeds that that arose with a wedge, and this is simply impossible to do with a “native” or gas wrench.

There is not enough strength to unscrew the nut, and the key will jump off

You need to do otherwise, namely, remove the cutting disc from under the nut, and then nothing will interfere with the unscrewing of the last.


The quick-release nut from the German manufacturer Bosch under the name SDS-clic is similar in design to the Makita super nut. These clamping devices are completely interchangeable and can be used on grinders from both manufacturers.

Less sophisticated quick release mechanism, but also cheaper than Makita and Bosch. It is based on a conventional thrust bearing. The simplicity of the design does not guarantee 100% hand loosening when the disc is clamped.

unscrewed, angle, grinder, operation

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

an angle grinder, or an angle grinder is a versatile tool with which you can do a wide range of actions. It has the usual mechanism of action, built on the rotation of the shaft by an electric motor. Needed for cutting iron parts, surface polishing and grinding various materials. One of the common problems during the operation of an angle grinder is biting the nut that holds the disc. This does not allow you to change the nozzle, and with a strong impact, you can destroy its thread, break the key or break the body.

  • Bite prerequisites
  • How to unscrew if tightened?
  • How to avoid snacking?
  • conclusions

Which way to unscrew the pedals: features of the procedure

Although the pedal is a common element of the large, it will be possible to remove it only if you have knowledge. As a rule, this is required in case of damage, for lubrication or replacement of the connecting rod. Which way to unscrew the pedals? This is described in the article.

READ  How to Insert Brushes into an Angle Grinder

How to change a disk if it is jammed?

What to do if the wheel on the “angle grinder” is stuck? This can happen, for example, when, as a result of work, pieces of the workpiece being cut sharply clamp the rotating disc. This often leads to its destruction.

To unscrew the nut tightened as a result of rotation, if the circle is bitten, it can be very difficult.

Why is the lock nut tightening?

The angle grinder, depending on the brand and diameter of the working disk, develops from 6,000 to 12,000 revolutions per minute. When the rotating disk sharply touches the surface to be treated, the following rapid processes occur.

The cutting disc, cutting into the material, experiences great resistance and slows down somewhat, but the rotor of the electric motor rotates for a few more moments by inertia at the same speed and literally twists the spindle thread into the lock nut, pressing it into the cutting wheel. Now it will not be easy to unscrew it, especially with a native key.

There are various ways to get rid of this defect. Not all of them pass without a trace for the instrument. Here we will consider one of them, which can be called auto thermal.

Features of pedal repair

The presence of torsional obstacles is associated with mechanical stress due to external factors. To eliminate such obstacles, you must:

  • Treat pedals with kerosene product or solvent. This procedure is necessary to remove dirt that interferes with rotation.
  • Warm up the connecting rod with the axle. Due to the small damage, the thread is easier to loosen and the axle is removed.

It is necessary to install the axle carefully, because this will prevent damage to the threads. Otherwise, dismantling will be difficult.

Although the pedal is a common element of the large, it will be possible to remove it only if you have knowledge. As a rule, this is required in case of damage, for lubrication or replacement of the connecting rod. Which way unscrew pedals? This is described in the article.

A pedal is a fundamental constituent element of the system, consisting of:

  • contact, where there is a mount for special shoes;
  • mundane.

An easy way to unscrew a clamped nut

Now, let’s look at the most gentle way to unscrew a clamped nut on an angle grinder. I will not say that this method is a panacea for such a problem, but of all the existing possibilities, it is the most optimal.

First, you need to find a piece of metal up to 1 mm thick. I recommend taking a plate that will be even thinner, about 0.8 mm.

It must be clamped in teski. The dimensions of this product do not play a special role. What will be at hand, then take it. The main parameter is thickness. If you take metal thicker than 1 mm, then nothing will come of it.

Next, you need to break off the remnants of the disc. Most likely, a piece flew off from him. To do this, you can use your hands or ordinary pliers. It is necessary that one nut remains, and the remnants of the disc are not visible.

You should get it as in the photo. Only a small part of the abrasive disc remains, which is sandwiched between two nuts. We need to extract it too.

Next, you need to very carefully insert a metal plate between the two nuts, where we have a piece of the disk. Thus, we begin to cut. Now you understand why the metal must be thinner than the disc itself, clamped in an angle grinder.

After a while, the remnants of the disc will simply grind off. You will feel this immediately, after which you must turn off the angle grinder.

After performing such manipulations, unscrew the nut on the angle grinder even by hand

It is very important to clamp the sheet of metal in a vice. Never hold it in your hand

The most important thing is safety. Yes, and during this process the nut heats up very much, keep this in mind.

How to remove, change a jammed disc from an angle grinder?

How to remove a disc from an angle grinder. an angle grinder (hereinafter referred to as an angle grinder), popularly called an angle grinder, is probably the most necessary equipment that is in the arsenal of virtually every master, regardless of his qualifications.

This is a tool that is intensively used in abrasive processing: cutting, grinding, cleaning workpieces from stone, metal and many others. It is widely used in such areas as: construction, woodworking and other similar types of work. Like any other tool, an angle grinder is also divided into several classes.

This refers to the following: household, semi-professional and pro-class instrument. This systematization is determined by the power resource of the tool, its performance, the presence of certain additional options, material and build quality, etc.

Consumables for an angle grinder, in addition to different types of cleaning brushes, are cut-off wheels and various grinding discs. Angle grinder accessories: how to make the right choice?

How to unscrew and correctly place a disc on an angle grinder

This simple operation sometimes baffles even experienced locksmiths or users of an angle grinder. The reason is that the disc is fixed with a special nut. The nut has 2 or 4 holes, into which a special key is inserted. This key was always included with the purchase of an angle grinder. Perhaps he is now included in the kits.

According to the instructions for the angle grinder, you must press the lock, which is located on the back of the gearbox. When the shaft is fixed, unscrew the nut with a special wrench and change the disc. But it is difficult to unscrew the nut if it is not clamped. And it clamps it with such a nut almost always. An attempt to unscrew the disc leads to breakage of the retainer behind the gearbox.

Strong hammer blows

You hit the hub. you hit the bearing! If you carry out a replacement, then go ahead! If you value the bearing, avoid this method.

Warming up the hub nut with a burner. Not recommended!

How to properly place a disc on an angle grinder

Grinding discs have different diameters, different thicknesses and different uses. Some are made for metalworking, others for ceramics, and still others for woodwork.

READ  In Which Direction The Nut Is Unscrewed On The Angle Grinder

A disc of a size that does not exceed the size of the protective cover must be installed on the angle grinder. The size of the disc to be installed is indicated in the instructions and on the marking table of the angle grinder.

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

The grinding wheel has a front and a back. The front side is the one on which the manufacturer’s markings and corporate drawing are applied. Face up when installed on an angle grinder.

Installs the disc in this way. So that during operation, sparks with particles of the processed material flew towards the worker. This is related to a safety issue. If the angle grinder breaks free from the hands, it will not fly towards the worker.

Therefore, it is imperative to wear protective clothing or a heavy apron when working with an angle grinder. Eyes and open parts of the face must be protected with a mask or at least goggles.

A fairly common problem for those who use an angle grinder, an angle grinder, the cutting disc broke and the clamping nut tightly clamped. And the most interesting thing is that sometimes it is practically impossible to unscrew the nut either with a special angle grinder, or with a gas key, or something else. And if it is possible to do this, then it takes enormous efforts and wasted time. I will show you an easy way to save you time and effort to unscrew this angle grinder nut without the hassle.

Take a chisel, make notches on the edges

The increase in diameter, of course, makes the hub nut unsuitable for further use, but it will be easy to unscrew it.

How easy it is to unscrew the nut of an angle grinder if the disc is jammed

Various mechanisms make our work easier, both in production and in domestic conditions. But sometimes they bring unexpected and not very pleasant “surprises”. After all, it is impossible to foresee all situations in which you will have to use the tools.

Unscrewing the hub nut on the VAZ: “burn, beat and twist!

Now we will consider the methods that may be the only effective in your case, but from this they are no less radical, even barbaric.

Unscrew and tighten the nuts

It is possible to tighten or unscrew the large nut on the mixer even if the thread on it has already been torn off as a result of unsuccessful dismantling attempts. There are several ways to solve this problem:

  • The head of the hardware is clamped in a carpenter’s vice or clamp and with their help, performing rotational movements, the problem hardware is unscrewed. The same tools can be used to tighten the hardware if necessary.
  • On top of the horizontally located hardware, a nut with a large diameter is put on with effort, and then this structure is unscrewed with a tool suitable for the size of the upper fastener.

In the case when you need to unscrew a round hardware or hardware, in which all the edges are completely smoothed, you can apply the following methods:

  • Put another hex nut of the appropriate diameter over the round hardware. Next, you need to clamp the nut with a vise or clamp and unscrew the hardware.
  • Place another larger auxiliary nut over the round screw nut. At the junction of the nuts, drill a hole into which to insert a stud or drill. Next, the nut must be unscrewed with a hairpin.
  • A metal pin is welded to one side of the hex fastener, then another pin is welded to the pin. so that an L-shaped lever is obtained. Using the resulting lever, unscrew the hardware.

In some cases, you can unscrew the problem hardware by destroying it:

  • With the help of a chisel and a hammer, you can swing the problem hardware. The chisel is placed on the edge of the nut and a hammer is struck on the chisel. So alternately pass all the edges several times.
  • If you drill several holes in the hardware, then using a chisel with a hammer you can destroy its structure.
  • The fastener is cut with a cutting disc of an angle grinder or cut with a hacksaw blade for metal.

Angle Grinder: 4 Mistakes to Avoid

Sometimes it is necessary to unscrew a tightly wrapped plastic nut. In this case, the following manipulations will help:

  • With the help of a steel tape, which is tightly wrapped around the head of the nut, a rotational movement is performed using the ends of the tape as a handle.
  • 2 wooden planks are pressed to the edges of the hardware, placing them opposite each other. Grasping the ends of the planks with your hands, rotate counterclockwise.
  • To unscrew / twist, you can use an adjustable gas wrench or pliers jaws, spread apart in different directions.
unscrewed, angle, grinder, operation

You can screw the hardware with a simple device:

  • take a long auxiliary bolt and screw a nut onto it;
  • next to it, another one is screwed in, but a gap is left between the nuts, into which the head of another screwed bolt or nut is placed;
  • both hardware are tightened on an auxiliary bolt so that they firmly clamp the head of the mount to be mounted;
  • then perform rotary movements in the direction of twisting.

When the procedure is complete, the fasteners on the auxiliary bolt are unscrewed and the device removed. This method is also suitable for the process of loosening the nuts.

Jumping on the lever

The “method” is fraught with the danger of unexpected breakage of the nut edges, breakage of the key, and so on. Just don’t do it like that.