Which side to tighten the nut on the angle grinder

How to remove a burnt disc from an angle grinder

The use of new nuts solves the problem of removing the disc, but what to do with an already eaten disc? Even if the disc was installed correctly, it is not always possible to remove it. Practice suggests different ways to solve the problem. You can clamp the retainer and hit through the extension on the holes of the nut in the direction of untwisting. This option is possible only if the retainer is in good working order. But the retainer 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 gearbox shaft with turned chamfers. The lower support washer is put on them. A standard wrench cannot be installed there. it is very narrow. But you can take a regular open-end wrench on “17” and grind it on both sides.

The turned key will go into the gap, set on the shaft chamfers and fix it. Now any nut will be unscrewed with any key, and the disc or its remains will be removed from the angle grinder.

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.

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.

Which way to unscrew the nut on an angle grinder

And check again. by disconnecting the angle grinder from the mains and disassembling the structure on the spindle. It should be something like this:. a washer (with slots fixed on the axis and a protrusion for the diameter of the disk). the disk itself (which rests on the washer and is centered by the protrusion). a nut (which presses the disk with its flat part). Collect all this without effort and try to turn the disc by hand in the direction opposite to its rotation (i.e., simulating its behavior in real rotation). the nut should tighten when rubbing against the disc. If so, it is not clear what and at what moment is unscrewed.

PS And the profile under the gypsum board is more humane and faster to cut with scissors!

And what kind of balgarka is this? maybe it’s done so badly that you can’t really tighten it? or, for example, when starting and stopping the nut itself unscrews (if it is absolutely cheap).

You can counter it if everything is so bad

When stopped, only the angle grinder with brake can be unscrewed. And this is not a cheap Bulgarian

A nut, but its sides are not flat, and these nuts are made of different materials (at home, even aluminum is lying around somewhere)

IMHODOM Forums hands from the shoulders The clamping nut is unscrewed on an angle grinder

This thread has 11 replies, 10 members, last updated by Vitaliy on 21 Aug’14 at 06:42.

The disk turns clockwise The nut should turn clockwise or counterclockwise too?

the nut clockwise, never unscrewed, but quite the opposite.

The nut is tightened clockwise. Lock the shaft normally and tighten. often she does not want to unscrew than flies. Once I had to disassemble the entire head at the angle grinder (at the same time I cleaned and lubricated it) to unscrew, broke the disc and in the process tightened it so that I bent 2 keys (they are somehow flimsy).

ZY Before working with an angle grinder, do not be too lazy to put on protection

))))))))))))))) Really? …. Clockwise. the nut, and the disk should rotate towards.

If you specifically bite, you can unscrew with an adjustable wrench.

when he disassembled his head and squeezed it in a vice from the other end, unscrewed it only with a gas key

Cardboard circles help from biting, in most cases I twist 99% with my hands. You stop it with a button, and you turn it right behind the disc, there have never been any problems.

And I heard that welded ones are specially made so that the disk spins in the other direction, but why? I do not know.

An arrow is stamped on the angle grinder (on the body). This is in which direction it is shown. in that direction the disk is spinning. And in that direction you need to tighten the disc. To do this, simply turn the disc by hand. the whole nut is tightened On the nut, right-hand thread.

If sparks fly at you, then the right-hand thread and upon impact (pulling an angle grinder from the hands), the thread is automatically tightened.

If sparks come from you, the disc will loosen when not fully tightened. To avoid when your angle grinder is knocked out of your hands and the nut is jammed. you need to put a cardboard gasket between the disc and the nut (it will even go from a pack of cigarettes)

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.

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.

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.

What to do if a nut is stuck?

A common problem when using an angle grinder is a jammed nut. The first thing to do in such a situation is to determine the direction of rotation of the disc. It is recommended to unscrew the jammed nut in the same direction. There are several most effective ways to solve this problem.

  • Use an open-end wrench and socket. To do this, it is necessary to grind off the surface of the open-end wrench by 4 millimeters, which has 17 millimeters. Carve four projections on the head of the end face 24 mm, which will align with the holes of the flange nut. Then an open-end wrench is placed under the disc and the end head is placed on the nut of the angle grinder. After that, the ratchet should be turned in the direction of rotation of the disc.
  • Apply a gas wrench. Knowing the laws of physics and using a gas wrench, you can increase the moment of force, since the length of the shoulder will increase.
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But do not use too much force, as you can crush the flange and damage the spindle rotation lock.

an angle grinder, or an angle grinder, is a versatile tool with which you can perform a wide range of actions. It has a simple mechanism of action based on the rotation of the shaft by an electric motor. Essential for cutting metal parts, polishing surfaces and sanding various materials. One of the common problems when using an angle grinder is biting the nut that holds the disc. This does not allow replacing the nozzle, and strong impact can damage its threads, break a key or break the body.

The angle grinder is a simple and useful tool for home or professional use. The most common problem while working with it is biting the nut that holds the disc. This can be dealt with by mechanical action on the mechanism (blows to the mount, using a lever and grinding the disc), and by chemical methods. treating the thread with oil or rust solvent.

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.

How to remove a burnt disc from an angle grinder

The use of new nuts solves the problem of removing the disc, but what to do with an already eaten disc? Even if the disc was installed correctly, it is not always possible to remove it. Practice suggests different ways to solve the problem. You can clamp the retainer and hit through the extension on the holes of the nut in the direction of untwisting. This option is possible only if the retainer is in good working order. But the retainer 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 gearbox shaft with turned chamfers. The lower support washer is put on them. A standard wrench cannot be installed there. it is very narrow. But you can take a regular open-end wrench on “17” and grind it on both sides.

The turned key will go into the gap, set on the shaft chamfers and fix it. Now any nut will be unscrewed with any key, and the disc or its remains will be removed from the 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:

  • 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.

angle grinder pin wrench tip

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.

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.

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.

Reasons for biting

Typically, this problem occurs on an angle grinder with a working surface diameter in the range of 150-180 mm. When a strong torque occurs, the disc bites. This leads to the fact that the attachment cannot be removed with a conventional wrench, even with the application of serious physical effort.

The second common reason is the use of an angle grinder disc that does not match the factory parameters of the tool. This leads to a disruption in the operation of the entire mechanism and jamming. In rare cases, the nut does not lend itself to loosening when rust appears on its threads. This most often occurs during long-term use of the instrument or storage without changing the accessory.

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

How to avoid snacking?

To avoid the trouble when changing the angle grinder attachment, it is advisable to prepare in advance for work. To do this, you can insert a small spacer between the disc and the nut. Suitable material is cardboard, a piece of linoleum or plastic.

If the fastener is constantly tightening too tightly, it is advisable to use a circle with a smaller diameter. It is also important to monitor the cleanliness of the tool, timely treat the thread with oil, WD-40.

What to do if a nut is stuck?

A common problem when using an angle grinder is a jammed nut. The first thing to do in such a situation is to determine the direction of rotation of the disc. It is recommended to unscrew the jammed nut in the same direction. There are several most effective ways to solve this problem.

  • Use an open-end wrench and socket. To do this, it is necessary to grind off the surface of the open-end wrench by 4 millimeters, which has 17 millimeters. Carve four projections on the head of the end face 24 mm, which will align with the holes of the flange nut. Then an open-end wrench is placed under the disc and the end head is placed on the nut of the angle grinder. After that, the ratchet should be turned in the direction of rotation of the disc.
  • Apply a gas wrench. Knowing the laws of physics and using a gas wrench, you can increase the moment of force, since the length of the shoulder will increase.

But do not use too much force, as you can crush the flange and damage the spindle rotation lock.

  • Use a puncher. If you set the hammer drill in chiseling mode without the rotation function, then it will work on the principle of a jackhammer. A six-millimeter drill is placed on the flanged end and work begins. Once the nut has moved, it can be easily unscrewed with a special angle grinder wrench.
  • Warming up. If the nut is heated with a technical hair dryer or a gas burner, then the metal will become more malleable. You just have to unscrew the nut with a wrench. But during the heating process, care must be taken not to damage the plastic parts and the gearbox.
  • Disc breaking is an easy and quick way to unscrew a jammed nut without a wrench. It implies a complete shredding of the disk. For this purpose, it is worth using a hacksaw or pliers. When only the inner ring remains of the abrasive wheel, clamp the unnecessary metal plate in a vice (its thickness should not exceed the thickness of the disc). Next, you need to start an angle grinder and grind off the abrasive to the seat sleeve. Remember to wear protective goggles and gloves when doing this. Then it remains only to unscrew the flange nut by hand.
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How to unscrew the nut on an angle grinder?

Nowadays, almost everyone who loves and knows how to tinker has such a tool at home as an angle grinder. The correct name for this tool is angle grinder (angle grinder). it is called an angle grinder due to the fact that the first mechanisms of this type were brought to the Soviet Union from Bulgaria.

In its classic version, the angle grinder is a hand-held power tool with an abrasive wheel in order to process the joints of flat metal surfaces. But with the help of this simple mechanism, you can also cut sheet metal, fittings, ceramic tiles.

How to prevent re-clamping?

In order not to get into a similar situation in the future, carefully read the following recommendations of experienced craftsmen:

  • when tightening the disc nut, do not exert unnecessary efforts by pressing the key, since at the moment of rotation the nut will tighten itself to the desired level;
  • before installing a new disc, place a cardboard or plastic washer under the nut; it can be cut from any available material;
  • the labeled side of the abrasive disc must touch the support flange and not the nut; if this condition is met, the metal ring of the circle will protect it from jamming;
  • weld a regular hex nut onto the flange, which can be unscrewed with a simple wrench.

Angle grinder cut stones or discs are not always of good quality and accurate size. This can lead to a situation where the nut is jammed. But if this happens to you, do not despair. Useful advice from experienced craftsmen and your own ingenuity will always help you out in difficult times and tell you what to do in this situation.

To learn how to unscrew the nut on an angle grinder without much effort, see the video below.

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.

This also applies to an angle grinder (an angle grinder. an angle grinder), when the cutting disc is clamped on it so strongly that it is not possible to unscrew the clamping nut with a standard wrench or other tools or methods. In this case, there is a risk of breakage of the quick clamping button of the disk and even the body of the tool, usually made of aluminum alloy. The matter is further complicated by the fact that the surface against which the working disk is pressed is often round and it is impossible to stop it.

How to remove a disc clamp on an angle grinder

To implement this method, you will need some kind of massive wooden material: a piece of thick board, a piece of timber, or just a stump.

Then we take an angle grinder with a tightly clamped disc, turn on the tool and press the fixing nut against the surface of the stump with sufficient force so that it continuously rubbed against the wooden surface.

The process must be continued for two to three minutes. This time is quite enough for the clamping nut not only to heat up, but to glow hot. If heating is not stopped in time, there is a risk of damage to the spindle bearing due to overheating.

The degree of sufficiency of the thermal effect on the fixing nut can be checked using a pipette with water: drops from it instantly evaporate, barely reaching its surface.

Then we proceed in the standard way. Press the button for quick disk replacement and unscrew the nut with a standard wrench without any effort. In this case, the well-known property of the metal helps us to expand when heated.

The nut can be unscrewed absolutely effortlessly.

How easy it is to unscrew a jammed nut on an angle grinder

In this article I want to talk about a simple way to unscrew a jammed nut on an angle grinder due to biting the cutting wheel.

Very often there are situations when you are cutting something with an angle grinder and suddenly it clings or bites on the cutting disc, or even crumbles altogether. And it is in such a situation that it is quite difficult to unscrew the nut of an angle grinder without any auxiliary techniques or tools.

But, there is one very good proven method that works 100%, it has been tested more than once.

And what is needed for this, you just need to warm up the nut very well, since the heated nut expands and unscrews well, but what to do in cases where you do not have a torch or a cutter at hand.

So, what we do for this, first we split the remaining circle, remove all its excess so that one nut remains, like in the picture.

Next, we take a wooden block and start it as if we saw it with an angle grinder, but we saw it with only one nut. So, we saw for about one minute so that our nut heats up well, well, then we take the appropriate key and calmly unscrew the nut.

That’s all, you can put a new disk and continue working.

How to Unscrew the Nut on an angle grinder without a Key [Instructions]

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?

Step

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.

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.

Grinding and roughing

Grinding wheels are divided into four types:

  • Special wire wheels eliminate rust and remove stubborn dirt.
  • Diamond modifications in the form of a bowl are used to polish stone products.
  • Metal surfaces are polished with plastic or rubber discs. You can attach removable discs with sandpaper, felt, sponge, cloth to the plates.

Most sanding discs work with special pastes or liquids that include the finest abrasives. These attachments are used to grind surfaces of any materials, including car body parts in car services.

Never place the saw blade on an angle grinder!

This is not just a subtitle of an article, it is a cry from the heart of all power tool sellers. After all, they very often come to them with the same request: “Give me an angle grinder so that the tree can be cut.” And all of them unanimously answer in such cases: “You don’t saw wood with an angle grinder! By definition, you cannot put a saw blade on an angle grinder! ” Why is that? With this question, we turned to the developers of the AtakaTM cutting tool, and they gave us an exhaustive answer on this topic.

Yes, an angle grinder (angle grinder) is a powerful tool, and it can easily cut both a simple board and a thick log, as long as the diameter of the saw blade is correct. But cutting wood with a saw blade mounted on an angle grinder is, first of all, very traumatic, especially if the protective cover is removed from it. After all, the angle grinder has a very high rotation speed, which creates a centrifugal force, which will significantly increase the load on the saw blade. In addition, a circular saw is structurally different from an abrasive wheel. it has teeth, and this circumstance leads to increased vibration, especially if saw wheels for metal are installed on an angle grinder. As a result, such a load will significantly exceed the tensile strength of the circular saw blade, it can simply break during rotation. What this is fraught, probably, has already become clear to everyone. And in such a situation, nothing will save you from injury: neither the protective cover of the angle grinder, nor the cutter’s personal protective equipment.

To prove the danger of such disc castling, all kinds of tests were carried out. Yes, and in life there were many cases when the “savvy” owner was left without arms or legs. And in 2011 there was a unique case when a certain “household” Volgograd resident decided to cut branches from a tree at his dacha using an angle grinder and installed a circular saw blade on it. As a result, he was taken to the Department of Thoracic Surgery with a ruptured chest. Luckily for the poor guy, it ended well.

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Sewing off a jammed circle

If, after applying the first 3 methods, the nut does not loosen, then the remaining abrasive disc between the flanges can be ground off. To do this, do the following.

  • Use pliers to remove the rest of the circle around the edges of the nut as much as possible.
  • Clamp a piece of sheet metal as thick as the disc itself in a vice, turn on the angle grinder and grind off the rest of the circle on the end of the sheet metal.

Instead of iron, you can clamp a piece of an abrasive wheel in a vice. In this case, the grinding of the rest of the tool between the flanges will occur faster, and the nut can be unscrewed by hand.

But the use of a stationary abrasive wheel requires great care, because when grinding the remnants of the tool, the geometry of the flange can be damaged. If this happens, you will have to face the nut.

Using a penetrating lubricant

Water the flange-to-shaft connection liberally liquid WD-40.

It tends to penetrate into inter-threaded spaces and small cracks. After applying the liquid, wait about 5 minutes and try to unscrew the fasteners with a standard wrench.

Abrasive discs for stone

They are absolutely identical to discs for metal and differ only in the used abrasives.

Cutting (abrasive) wheels for metal

These circles are used to work with sheet steel body (disc thickness from 1 to 1.6 mm) and bar steel: rebar, round timber, channel bars, angle bars and other types (disc thickness from 2.5 to 3.6 mm). There are special attachments for working with stainless steel, aluminum, cast iron and other metals.

This information is available on the surface of the disc in the form of an applied marking and a colored strip. Abrasive discs are several layers of fiberglass mesh, onto which bakelite abrasive material (silicon carbide, corundum, electrocorundum) is pressed on both sides under high pressure. The reinforced abrasive discs are then placed in a heat treatment oven to gain strength. The preset heating temperature is 200 degrees. There, the mass is sintered and becomes strong and resistant to breaking into fragments.

How to remove it?

Discs, especially those designed for cutting, burn out quickly and have to be replaced.

It will be useful to remind once again about the need to disconnect the “angle grinder” from the network. Work to be done with fast rotating parts and better protect yourself.

If you need to replace a worn disk, you need to perform a number of simple operations.

  • The disc is secured to the stem stem with a threaded nut. In the kit of any angle grinder there is a special key, on the arms of which pins are fixed, which cling to the holes of the flange.
  • The spindle is fixed with a special button, the cotter pin of which, when pressed, enters the hole of the gearbox, thus fixing it. Having pressed the button with your right hand, at the same time with your left hand you need to unscrew the fastening nut with a wrench. If the nut has moved from its place, unscrew it by hand. That’s it, now the disc can be removed.
  • There are times when the key, for some reason, was not at hand. What to do? The easiest way out is to stop working. But, as they say, this is not our method. It is also possible to unscrew the clamping nut of the “angle grinder” without a key. Often a pipe (gas) wrench is used for this. On such a key there is a device that spreads it. It is necessary to tighten the nut and, fixing the gearbox of the “angle grinder” with a button, move it from its place. Then it can be unscrewed by hand.

how to loosen angle grinder disc nut

  • There are holes in the nut for fixing it with pins on the key horns, you can unscrew it by tapping with a hammer on a chisel or a bar that is pressed into the hole.
  • It is sometimes possible to push the nut off by simply tapping its edge with a hammer in the direction of twisting. However, in this case, damage to the flange may occur, especially the holes for the pins of the key; in the future, it may be impossible to apply the key to such a nut.
  • A very good result is obtained when using a nail to make a key. It is better to choose a large nail, from 100 mm. Using a hammer and pliers, the nail is U-shaped. With a hacksaw or chisel, the point and head of the nail are cut off. With such an improvised wrench, you can try to knock off the nut. You can bend the ends of such a key, then it will turn into a kind of open-end key, but this will require a lot of labor. You can also insert a gate, for example, a hammer or other nail, into the arc formed by a bent nail.

Advice

If you had to use a gas wrench, you must remember about the very powerful shoulder of such a wrench and about the effort that is applied to the parts of the “angle grinder”. If you do not act carefully, the spindle lock could be ripped off or the gearbox could be damaged.

All manipulations with the disc of the angle grinder must be carried out with the power supply completely disconnected (the plug must be removed from the socket). Any inadvertent pressing of the start button will cause the electric motor to turn on, and the rod rotation speed is very high. In this case, injuries cannot be avoided.

Working with an “angle grinder” involves a lot of waste in the form of metal or wood shavings and dust. Before starting work, you must wear special safety glasses: they will protect your eyes from fragments of the cutting wheel itself in the event of its jamming and destruction.

Glasses are needed not only as a safety element. If the eyes are protected, more attention can be paid directly to the work of the “angle grinder”, to ensure the correct cut or the choice of the correct mode of operation. This will allow the most efficient use of consumables (cutting wheels), minimizes the occurrence of abnormal situations with a biting disc or its destruction.

A protective mask that completely covers the face will perfectly replace glasses. this is especially important for a visually impaired master who wears diopter glasses, on which safety glasses cannot be worn.

The disc on the “angle grinder” can be installed both “away from you” and “towards you”, depending on the direction of rotation and, accordingly, the flow of chips. This does not make a fundamental difference in work. However, the “angle grinder” with a circle “towards itself” when biting the disc tends to jump out of the cut forward, and not on the one who uses it. This is especially important when working with powerful tools, but even a small angle grinder can be a serious hazard.

A specially mounted extension cord with a plug socket, preferably without grounding, will help to quickly stop the operation of a machine that has escaped from the hands.

“Angle grinder” is a rough processing tool and it is not worth striving to obtain an ideal surface as a result of its work, the main thing is to make a rough cut, which later, if necessary, can be processed in other ways.

To work without clamps and jamming, it is better not to cut long metal workpieces to the end, leaving 1–2 mm of metal in the cut: they will be easy to break off afterwards, this will practically not affect the quality of the workpiece.

It is better to place small workpieces in a vice or press them with a clamp to a workbench or other reliable horizontal surface. The quality of the cut and safety depend on the density of pressing.

How to put the disc on the “angle grinder” can be seen in the following video.

How to tighten the nuts?

  • unscrew the nuts / bolts counterclockwise, respectively, tighten clockwise.
  • Start unscrewing the bolts by lifting the car on a jack, since the wheel has good support and it is easier to unscrew
  • also if you can’t unscrew it with your hands, help with your leg

How does a counter nut work?

The locknut is a locking element, a second nut that is screwed behind the main nut to prevent loosening of the threaded connection. The tension in the thread when tightening the second nut prevents the connection from being loosened.

How to tighten the bolts?

The bolts are tightened with wrenches. Bolts can be structurally different. depending on what is the purpose of the root-concrete connection. The screw is also a metal fastener. Screw connections can also be found in the mechanisms of various machines, furniture, etc.

What nuts are needed for stamped discs?

As a rule, bolts or nuts with a spherical clamping part are used to fasten steel (stamped) discs, and longer bolts or nuts with a tapered clamping part are used to fasten light-alloy (cast) discs. This is because the alloy wheel is thicker than the forged wheel.

How Self-Locking Nut Works?

As a rule, the action of self-locking nuts is based on the principle of frictional locking, that is, the creation of increased friction in the threads. The most perfect nuts, in which increased friction is created only at the end of the tightening.

How many Nm to tighten the wheels?

When installing wheels, not only the order of tightening the bolts (nuts) is important, but also the tightening torque of each of them. For example, in relation to wheel bolts, say, for VAZs, they must be tightened with a force of 70 Nm, and for many Volkswagen’s. as much as 160 Nm.

How to tighten the wheel nuts correctly?

The very process of tightening the wheel bolts is as follows:

  • The first step is to put the wheel on the protrusion of the central part of the hub and place the guide pins opposite the corresponding holes;
  • Next, hand tighten the bolts firmly enough so that the wheel does not come off;