Bite Disc On Angle Grinder How To Remove

16th March 2021

To install a new disk, after cleaning the casing, you must perform the following actions:

Install the bottom flange in place;
We put a special gasket on top of it (if gaskets are not provided, you can cut them yourself. The optimal material will be cardboard or tin).
Install the disk;
We put the second gasket;
Install the top flange on top;
We wrap the upper flange by hand in the opposite direction from the rotation of the angle grinder wheel, while holding the disk itself;
Next, press the release button again and scroll the flange with your hand until you feel resistance;
At the final stage, we make the final fixation using the same open-end wrench. To do this, insert the key into the holes and scroll a little more.

Remember that you need to tighten no more than a quarter of a turn, since if the flange is too fixed, the disc will become unusable.

After all the actions taken, you can safely continue to perform work.

One of the most frequently asked questions about mounting / dismounting accessories of an angle grinder is: “Which side should I put the disc on the angle grinder?”.

Usually, inexperienced masters ask such a question. Is it possible to set the circle on the wrong side. Yes. Firstly, if the disc is not flat, but, for example, a petal disc, then you will not be able to install it incorrectly, if the petals are located incorrectly, you just need to twist the casing and the handle onto the angle grinder. That is, the question disappears by itself.

If the circle is still flat, then you should be guided by its label, the so-called “shirt”.

If the angle grinder rotates towards itself, the disc should be installed with the “jacket” outward, if the disc rotates away from itself, then, accordingly, it must be installed with the “jacket” inward.

If you do not adhere to this algorithm, there is a high probability that the disk will fail very quickly or immediately deform.

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 referred to as an angle grinder, is probably the most popular inventory that is present in the arsenal of almost every master, regardless of his qualifications.

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

This refers to the following: household, semi-professional and pro-class instrument. This classification 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 various types of cleaning brushes, are cut-off wheels and a variety of grinding discs. Types of Angle Grinder Accessories: How to Make the Right Choice?

How to Place a Disc on an Angle Grinder Correctly?

In order to correctly place the disc on the angle grinder, it should first be noted that the disc is mounted on the spindle of the angle grinder using a special clamping flange with M14 thread. Let’s take a closer look at how to remove a disc from an angle grinder. In order to unscrew the disc from the angle grinder, you first need to dismantle the flange. Especially for such purposes, manufacturers complete the angle grinder with a special open-end wrench. It has a specific shape. The pins located on the horns of this key are inserted into specially provided holes on the flange.

To unscrew the flange, we fix the spindle. To do this, we clamp the latch, which is usually a button on the top of the case. When pressed, the cotter pin is placed in the hole of the driven disc of the gearbox, and this in turn prevents its rotation. Next, we insert the pins of the key into the specially provided holes on the flange, pressing the lock, you must simultaneously turn it counterclockwise and move the flange from its place. If the manipulations were successful and the flange succumbed, you can unscrew it by hand and put it aside.

Now let’s dismantle the disk. Often, in the process of intensive work with the tool, a certain deposit of small particles of metal and abrasive material forms on the inside of the protective casing. For optimal, stable and durable operation of the angle grinder, remove the bottom of the flange and clean the casing with a steel brush.

remove the disc from the angle grinder

This method is used in extreme cases.

Cut-off wheels for an angle grinder, in turn, have their own subspecies, such as:

Cutting wheels for metal work;
Abrasive wheels for working with stone;
Wheels for woodwork;
Diamond discs (mentioned above).

The purpose of each type of disc usually corresponds to its name.

Among the grinding discs, there are four main subtypes. flap, wire, diamond and bakelite-based grinding discs (straight, T41 profile and disc-shaped, T27 profile).

The flap disc is made from sandpaper. Its main purpose. it is the elimination of an existing coating such as old paint, primer or paint coat. Also, with disks of this type, wood products are polished.
Wire discs are used by artisans to remove rust. They can also remove other types of stubborn dirt.
Diamond discs are used for polishing stone.
Disc discs are made of plastic or rubber and are used to polish metal surfaces.

Please note: in the process of working with most discs, a special paste or grease is used, which contains abrasives of the finest grinding. They are mainly used for sanding surfaces such as, for example, car body parts.

Discs for an angle grinder differ among themselves in the following main characteristics:

Outside diameter;
Disc thickness;
The material from which the disc itself is made;
The characteristic of the maximum rotation speed;
And, of course, the area of the proposed work.

For the best understanding, let’s take a look at the main types of angle grinder discs and define their application:

Cut-off wheels. It is the most widely used consumable for angle grinder. Their main purpose is to work with metal, stone and wood. A variety of cutting wheels for an angle grinder are diamond discs. It is a heavy-duty tooling for processing high-strength materials such as reinforced concrete, tiles, porcelain stoneware, marble.
Grinding and roughing discs. As the name implies, this type of disc is used for grinding various materials, for example, polishing products made of stone, or for removing (peeling) the top layer, for example, removing a layer of rust or old paint coating.

remove disc from angle grinder

First, figure out which way to unscrew the nut.

The flange must always be folded in the direction in which the disc rotates.

For this kind of work, you will need either two gas keys or two clamps.

Here’s what you need to do: destroy the remnants of the disk, fix the washer located behind the disk with one key, unscrew the flange with the second.

How to remove the clamp

There are several simple methods that are used in the first place:

Insert a metal rod into the holes and try to rotate it with light hammer blows. The main thing is not to rip the holes or break the button.
Heat the fasteners. When the temperature changes, the technical parameters change slightly, and expansion occurs.
We grind the disc with another angle grinder until the nut unscrews.

These methods are effective, but not always. Therefore, there are more correct options for getting rid of the angle grinder from the fastening clamp.

A simple way to twist the nut

Using a thick piece of board, a stump or a piece of timber, you can warm up the nut. To do this, the angle grinder is firmly pressed against the wood so that the nut is constantly rubbing against the surface. We turn on the tool and hold it for 2-3 minutes. This time is enough for the mount to heat up.

Next, we clamp it using a regular key and unscrew it easily and freely. This happens due to the physical properties of metals to expand when heated. The method is very good, it works almost flawlessly.

How not to unscrew the nut

When the disc is pinched, the operator takes a long time to release it. This leads to irritation of the person, as a result of which inappropriate ways to correct the problem are applied.

We will tell you how not to act when jammed:

metal studs in the holes can lead to a weakening of the clamp, but more often they lead to a huge load on the gearbox, as a result of which damage to one of the structural parts of the angle grinder occurs;
a nut of a larger diameter welded on top, torn off with a huge wrench, will damage the gear teeth and break the thread;
heating with a gas burner is not the best option, this method is unlikely to help, but the physical properties of the metal will necessarily violate.

It is much easier and safer to cut off the clamped disc from both sides of the other angle grinder and unscrew the loose nut without any problems.

Bit a disc on an angle grinder, how to unscrew a nut

an angle grinder is an indispensable tool for various types of work. So much the worse when the tool crashes and the disc bites. In this case, it is not possible to remove the nozzle, as the nut is jammed. There is an easy way to twist the closed mount by incandescence, which we will discuss in the article.

How to remove a bitten disc from an angle grinder

Problems most often occur when working with sturdy materials. When started, the angle grinder runs at 6000-12000 rpm. In contact with the treated surface, the disc receives the strongest resistance. Its work slows down somewhat, while the motor continues to turn in the same mode.

This leads to sharp screwing of the retainer nut into the spindle thread. It is no longer possible to unscrew it with the usual key.

How to avoid pinching

Work tool problems are always best avoided. To do this, we work very carefully, making sure that the disc does not jam and break. We also recommend using special nuts. They are more expensive than ordinary ones, but they can be easily unscrewed in case of jamming.

Measures to prevent jamming

Taking care in advance about the safe operation of the angle grinder, you will save yourself the need to take measures to eliminate the abnormal situation. Such events include:

Placement of cardboard or plastic washers between disc, flange and spindle head. They do not allow the tool to jam, but even if corkscrewed, they can be removed / melted and the element can be easily unscrewed.
The abrasive wheel must be correctly positioned. To do this, place the front side of the circle on the support flange (picture to the gearbox). It must not come into contact with the clamping nut. In this case, a standard metal ring in the center will act as a washer that protects against jamming.
Weld a regular nut on the clamping flange, which allows you to press the installed disc using a conventional wrench.
Check the tightening torque. No excessive force is required to install the cutting element. Otherwise, it will jam under intense loads.

Replacing a disk in normal mode

Regularly working with an angle grinder, you need to constantly change the wheels, which are a consumable. If the tool is already inconvenient to work, then the worn out abrasive wheel should be replaced.

Important! Be sure to check the disconnection from the mains to avoid personal injury.

How to remove a hardened 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, fit 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.

With a nail

For these purposes, a 100 mm nail is best suited. It should be bent into a U-shape so that the ends fit freely into the holes of the clamping flange. The tip and cap are removed. By inserting a nail into the holes, the retainer is unscrewed. If the efforts of the hands are not enough, then add a nail or screwdriver in the form of a lever.

Replacing the disc in reverse rotation

This method has several advantages. it can be carried out without a key and with a broken spindle lock. Angle grinder beginners mistakenly believe that if the stopper breaks down, it is almost impossible to unscrew the nut. However, this is not the case. Don’t even need keys.

The bottom line is that the abrasive wheel needs to be rotated in different directions. Wearing thick gloves, you need to hit the cutting edge of the circle several times. This is what you will provide variable movement in different directions. As a rule, a couple of sharp blows are enough so that the nut can be easily unscrewed.

What causes the problem?

When spinning at idle speed, this problem is difficult to face. Especially when working with light wheels and tools with soft start function. However, after an increase in revolutions and contact with the cut surface, the following occurs:

When material resistance arises at the circle, the angular velocity of rotation sharply decreases, it slows down.
By inertia, the motor continues to run at the same speed for several moments, dragging the gearbox and spindle along with it.
The retainer nut is tightened by inertia along the thread of the spindle head, thereby pressing in the cutting disc.

That’s it, the process of tightening the fixing flange is complete. an emergency situation is obvious. Its occurrence is influenced by the following factors:

Large circle size.
High tool power.
Rotor massiveness.
A sharp increase in cutting depth, i.e. increase in resistance.

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

How to unscrew the disc nut of an angle grinder (angle grinder) if it is 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 disk 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, a 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.

This business is 4-5 minutes, no more.

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 is the most effective method.!

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

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.

Replacing the disc with opposite rotation

This method has several advantages. it can be carried out without a key and with a broken spindle lock. Angle grinder beginners mistakenly believe that if the stopper breaks, it is almost impossible to unscrew the nut. However, this is not the case. Don’t even need keys.

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

Everyone who has experience of intensive work with an angle grinder has probably at least once faced such a situation.

Usually, this happens if the disc is pinched between parts, it stops or breaks, and the motor of the angle grinder continues to rotate and thus permanently tightens the nut.

So what can you do if you bite a disc on an angle grinder?

Each master has his own secrets. Especially for you, we learned a few of them and now we will share the most common ways to get out of the situation.

To install a new disk, after cleaning the casing, you must perform the following actions:

Install the bottom flange in place;
We put a special gasket on top of it (if gaskets are not provided, you can cut them yourself. The optimal material will be cardboard or tin).
Install the disk;
We put the second gasket;
Install the top flange on top;
We wrap the upper flange by hand in the opposite direction from the rotation of the angle grinder wheel, while holding the disk itself;
Next, press the release button again and scroll the flange with your hand until you feel resistance;
At the final stage, we make the final fixation using the same open-end wrench. To do this, insert the key into the holes and scroll a little more.

Remember that you need to tighten no more than a quarter of a turn, since if the flange is too fixed, the disc will become unusable.

After all the actions taken, you can safely continue to perform work.

One of the most frequently asked questions about mounting / dismounting accessories of an angle grinder is: “Which side should I put the disc on the angle grinder?”.

Usually, inexperienced masters ask such a question. Is it possible to set the circle on the wrong side. yes. Firstly, if the disc is not flat, but, for example, a petal disc, then you will not be able to install it incorrectly, if the petals are located incorrectly, you just need to twist the casing and the handle onto the angle grinder. That is, the question disappears by itself.

If the circle is still flat, then you should be guided by its label, the so-called “shirt”.

If you do not adhere to this algorithm, there is a high probability that the disk will fail very quickly or immediately deform.

Safety regulations

When working with an angle grinder, it is important to remember that this tool has an increased risk of injury. Accordingly, it is impossible to lose vigilance in any case, even when disconnected from the mains. When using auxiliary tools and materials to replace the disc, be careful with them as well. Locksmith tools can also cause significant injury.

It would seem that there is nothing difficult in replacing the disk with a new one. Nevertheless, at this stage, the master is faced with a problem. the nozzle is tightly clamped with a fixing nut that does not want to twist off. How to remove a jammed disc from an angle grinder? What methods are used for this? What tools can be used if the original key is lost? You will learn how to remove a clamped disc from an angle grinder in this article.

Cut-off wheels for an angle grinder, in turn, have their own subspecies, such as:

Cutting wheels for metal work;
Abrasive wheels for working with stone;
Wheels for woodwork;
Diamond discs (mentioned above).

The purpose of each type of disc usually corresponds to its name.

Among the grinding discs, there are four main subtypes. flap, wire, diamond and bakelite-based grinding discs (straight, T41 profile and disc-shaped, T27 profile).

Grinding wheel 150 x 6.0 x 22.23 Sprut-A

Fix Locked Up (Jammed) Angle Grinder With Minimal Tools

The flap disc is made from sandpaper. Its main purpose is to remove existing coatings such as old paint, primer or paint coat. Also, with disks of this type, wood products are polished.
Wire discs are used by artisans to remove rust. They can also remove other types of stubborn dirt.
Diamond discs are used for polishing stone.
Disc discs are made of plastic or rubber and are used to polish metal surfaces.

The main question: How to choose the right disc for your angle grinder?

When choosing accessories for an angle grinder, first of all, you should decide on the type of proposed work. The choice of the type of disc will depend on this. We also want to mention that when choosing a consumable, be sure to take into account the power characteristics of each specific model. Examine the labeling. Often, it is printed on the disc itself and includes a set of symbols by which you can determine the relevance of this consumable to perform the intended work.

Also, focus your attention on such a parameter as the diameter of the disc. In no case should it exceed the size of the protective cover on the particular tool model. The size range of discs is usually represented by the following diameters: 115, 125, 150, 180 and 230 mm. The most common diameters are 125 mm. and 230 mm. They are optimal for most types of work and the capabilities of the tool itself.

Among the bakelite-based grinding discs, the most popular discs with a thickness of 6.00 mm. This parameter depends on the total diameter of the disc. The relationship is as follows: the larger the diameter of the disc, the greater its thickness and vice versa.

Tapping the nut

This method is similar to the previous one, only you can use a suitable metal rod or chisel. After fixing the spindle head, tap on the edges of the clamping holes in the direction of the wheel movement. Slightly moving the lock from a dead center, you can unscrew it by hand. However, the method is not the most harmless for the tool. the mounting holes for a standard key are damaged.

Sources:

http://setafi.com/instrumenty/bolgarka/zakusilo-disk-na-bolgarke-kak-otkrutit-gajku/
http://ingener-pto.ru/2019/12/12/kak-otkrutit-disk-na-bolgarke-esli-zakusilo/
http://vahatehnika.com/bolgarka/kak-snyat-disk-s-bolgarki-bez-klyucha.html

Angle Grinder angle, bite, disc, grinder