What to do if you bit a disc on an angle grinder

Conclusion: Difficulty replacing the grinding wheel

Before removing the grinding wheel, it is better to try to unwind all parts and remove unnecessary objects that may be an obstacle. This makes it easier to change the grinding wheel.

How often you need to change your angle grinder wheel depends on how often you use your angle grinder. If you use it often, your wheel will wear out faster and you will have to change the grinding wheel more often.

Try to avoid malfunctions and change the grinding wheel in time. To protect yourself and not endanger your health, make sure that the power supply is not connected to your grinder before any manipulation.

Difficulties in wheel replacement arise when nuts, washers, and screws become jammed or rusty. In this case, you will have to try several ways to remove the circle and make a lot of effort. It is also important to consider that grinding wheels can be very fragile. If you do not want breakage and deformation, you must be extremely careful when applying force to remove them. Remember that specific grinding wheels are suitable for specific metals. Choosing the wrong sanding disc is one of the causes of breakdowns and malfunctions.

Methods for removing the disc when the nut is jammed

If you have a jammed nut, you can try to unscrew it with an open-end wrench. 4 protrusions need to be made on the socket head. This will match the hole pattern of the flange. Then we place the open-end wrench under the disk and begin to rotate in the direction of the circle.

Heat treatment is another popular method. As the clamping nut heats up, the metal softens and becomes more “obedient”. After that, you can try to unscrew the nut manually or use a wrench. The disadvantage of this method is the risk of deformation of the gearbox. If there are plastic parts on the angle grinder, they may melt.

If you use a gas wrench, the force on the nut increases. It is important to control the thrust force here, since otherwise there are risks of bending the flange or breaking the retainer responsible for the rotation of the spindle. You can also move the nut from one point using a punch.

The most radical way is to intentionally destroy the disk. If it is slightly cracked, we just break it and remove the rest of the wheel from the angle grinder. As a result, only the central metal ring remains. The metal part itself is removed with a vice, tightly pressing the ring in them.

Regardless of the chosen method of solving the jamming problem, it is important to remember about the safety system and not endanger your health.

How to remove a sanding disc: important points

It is almost impossible to remove the grinding disc on an angle grinder without a tool. To remove the circle, you need to loosen a large number of screws, nuts, which is very difficult to do manually. Nuts, washers, screws are very tight and cannot be loosened manually.

  • disconnect the grinder from the network;
  • wait until the grinding disc has come to a complete stop;
  • use a wrench to turn the nut on the angle grinder counterclockwise;
  • remove the protective cover;
  • install a new wheel and tighten the nut.

When machining the wrong material with the wrong grinding wheel, you can face two potential risks. the disc can crack or break, creating a huge amount of grinding wheel pieces. Pay attention to the conformity of the materials from which the discs are made and the scope of their application:

  • aluminum oxide disc is designed for steel, carbide steel, iron. Alloy steel, high speed steel and similar metals in composition;
  • Silicon carbide grinder disc works with brass, cast iron, bronze and other soft metals. It is also designed for processing stone and non-ferrous metals;
  • ceramic alumina is very abrasive and is used on steel, hard metals. The main task of disks. precise grinding;
  • zirconium alumina. another type of grinding wheel designed for steel and most hard metals.
disc, angle, grinder

What makes the circle jam and why it is impossible to unscrew the disc?

Most often, a malfunction manifests itself when it comes into contact with the material. In idle mode, these problems are not traced, since the number of revolutions of the tool remains stable. But, when we start grinding or cutting metal, then an increase in the number of revolutions begins, which is reflected in the work of the disc and the angle grinder.

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A jammed disc can be recognized by the following signs:

  • at the circle of the tool, the number of revolutions sharply decreases and even braking, jamming can be traced;
  • the disc may give in to deformation due to an even stronger clamping of the nut;
  • increase in diameter and depth of cut.

In this case, you need to react to the current situation in time and take action. In this case, it is imperative to remove the clamped disc from the angle grinder, try to solve the problem with the least amount of time and effort.

One of the most common causes of a jammed nut is that you haven’t used an angle grinder for a long time and the nut, bolt or washer is rusted. Consequently, this becomes the cause of the instrument malfunction. If you are faced with such a situation, you need to perform a number of actions:

  • First, unplug your angle grinder.
  • Spray the structural parts of the angle grinder with an anti-corrosion agent or special solvent. The tool must necessarily get on the washer, nut, bolts.
  • After that, you can proceed to removing the protective casing and individual parts that can be unwound.

If special means do not help to cope with the problem, then you need to move on to the second method. Its essence lies in preheating with wax, after which you can use a wrench to unscrew the nut. Control the force so as not to break the sanding disc.

Sometimes the wheel cannot be unscrewed due to the wrong direction of unscrewing the nut. Make sure you unscrew in the right direction. If the nut cannot be unscrewed with a simple wrench, then you can apply force with a hammer. But, in this case, it is important to carefully adjust the force so as not to damage the parts of the angle grinder.

The way in which you can loosen the nut and fix the problem depends a lot on the type of grinder. The method of fixing the disc on the angle grinder also plays a role. Most often, you will need a wrench or screwdriver to remove the disc from the angle grinder.

If you decide to remove the disc from the angle grinder yourself or replace it, be sure to consider a safety system. Grinding machines and their cutting parts are very sharp, so you need to be extremely careful and do not forget about protective equipment. In addition to workwear, you will need protective goggles. If a wheel breaks, particles can fly off and hit your face. If the wheel is stuck and you cannot solve the problem, you will have to resort to more laborious methods.

How to prevent the disc from jamming?

Since the problem is quite relevant and many craftsmen have encountered it, it is important to understand how to prevent jamming and prevent such a turn of events. Precautions include:

disc, angle, grinder
  • It is best to use cardboard or plastic washers to fit between the disc itself and the spindle head. This prevents the tool from jamming. If this happens, it will be easy to unscrew the stuck nut and replace the disc.
  • Follow the rules for installing the abrasive wheel. The bright side with the picture should be close to the gearbox. In this case, there should be no contact with the clamping nut. Center ring will prevent jamming.
  • A nut can be welded onto the flange. Even if an abnormal situation occurs, it will be possible to solve it with an ordinary wrench without much effort.
  • Always adjust the tightening torque. Do not use too much force when installing the angle grinder wheel. If you pinch the nut, with increased loads, jamming will be traced. At idle, the malfunction cannot be determined.

With a hammer drill in jackhammer mode

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

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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?

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.

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.

How to fit an Angle Grinder blade, label up or label down?

Warming up

The clamping nut must be heated with a hot air gun or gas burner to make the metal more pliable. Then unscrew it with the universal wrench or by hand. But the risk of this method is that you can ruin plastic parts and gearbox elements.

Disk destruction

Before unscrewing the nut on the angle grinder, you will have to completely crumble the disc. If it is already destroyed, you can break it with your hands. Solid circles can be sawn with a hacksaw or a metal blade. The inner metal ring and pieces that do not lend themselves to mechanical stress should remain from the abrasive wheel. Then you need to clamp a metal profile or any unnecessary plate in a vice, 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 off the remaining abrasive to the seat sleeve. After that, the flange can be easily unscrewed with the universal angle grinder wrench.

How to replace disc blade Ryobi Angle Grinder

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

  • cut washers out of cardboard or plastic and place one under the disc and the other between the disc and the flange. Even if the circle gets stuck, the plastic washer will melt when heated;
  • The face of the abrasive tool, to which the marking label is affixed, must be in contact with the support flange and not with the clamping nut. With this installation, the metal ring of the circle acts as a washer and protects it from jamming;
  • weld a standard hex nut onto 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 easy it is to unscrew the nut on an angle grinder (angle grinder) if it is jammed

First of all, break down to the base what is left of the broken cutting disc.

This is very simple, you just need to take the pliers. In this case, we use protective equipment. glasses and gloves, since metal fragments will fly.

The result should look like this:

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

Next, you need to turn on the angle grinder and use this piece to grind off the remnants of the disc between the nuts.

After everything is grinded off, we unscrew the nut inside not even with a key, but with our hands.

This is how it is done, in a very simple and fast way. over, it is safe for the bearings of the angle grinder. Because if the nut does not unscrew, many immediately arm themselves with a hammer and try to unscrew the nut by tapping on it.

How to unscrew the nut on an angle grinder if you have a bite

I tried to stop with a button, take a standard key and press, knock with a hammer. no use.

I took it home, locked the button, tried to use the gas wrench. and that’s it, just scratched the nut. At the same time, I remembered how often I heard about cases when the nut on an angle grinder is unscrewed with great difficulty.

What to do to prevent this from happening again

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

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Today, a cut-off stone or disc is not often found in the proper quality, so when it breaks, it often becomes a problem.

Naturally, improper operation may also be the cause. But now you already know how to unscrew the nut on an angle grinder.

If you still have questions or something is not clear, then you can view everything on

How to unscrew a disc (nut) on an angle grinder, if it is bitten, jammed, does not unscrew ?

an angle grinder, or as it is called more popularly and in a popular way, an angle grinder, nowadays an indispensable and very useful tool. Without it, neither here nor there! And if it suddenly fails, then you have to dodge in every possible way, look for alternatives and think about restoring the instrument. At the same time, it is impossible to use an angle grinder for its intended purpose because of what seems to be a simple pad, when the disc cannot be unscrewed. Rather, the nut that holds this disc is not unscrewed. Here you can “break the wood”, namely, bend or break the key, damage the lock button, break the case, but never unscrew that same unfortunate nut. So, we will warn you right away, 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 tactics. And it is precisely the cardinal method 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. 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.

How to unscrew the disc nut of an angle grinder (angle grinder) if bitten

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

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

The second thing that many advise is to warm the nut. We warm up the nut. As a result, it is slightly, but physically still obliged to expand. Resizing may or may not help

Do not pull all the way until the scroll hold button stopper or the button itself bursts. In this case, it is not the tool with which you unscrew it that breaks, but often the case of the angle grinder.

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

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

If you will be using a second disc or metal plate, it is best to insert them in a vise to hold them. Since it is dangerous to hold such objects with your hands. This method is the most effective.!

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.