An angle grinder gets bitten, what to do?

Bitten disc on the angle grinder, how to unscrew the nut

Angle grinder. an indispensable tool for various types of work. It’s even worse when the tool fails and a disc bites. In this case, it is not possible to remove the nozzle, because the nut is jammed. There is an easy way to twist closed fixture by heating, which we will tell in the article.

Malfunctions most often occur when working with strong materials. When starting the angle grinder operates at a speed of 6000-12000 revolutions per minute. The disc encounters the work surface and gets the strongest resistance. It slows down a little, while the motor continues to spin in the same mode.

This causes the retainer nut to be screwed sharply into the thread of the spindle. It is no longer possible to unscrew it with the conventional wrench.

Sliding Angle Grinder Stand 3 in 1

Open-end wrench and socket head

To remove a permanently tightened retainer angle grinder you can use a wrench for 17 and a socket head for 24. However, they have to be refined before such non-standard use. The wrench needs to be ground to a thickness of 4 mm, and on the head to grind out the ledges for the holes on the retainer of the angle grinder.

Dismounting proceeds as follows. The wrench is inserted under the abrasive and the socket head is put on the flange. Next, the two tools have to be turned in the opposite direction from each other. The nut should then be able to be unscrewed without any effort.

These tools often replace special tools, or are used as an adjunct. It is several times easier to loosen the clamping of the abrasive disc with these tools than with the standard version.

angle, grinder, gets, bitten

Warming the spigot

An effective method of removing a nut from a device that has become jammed is to heat it up. The latch can be heated with a burner or construction hairdryer and unscrewed “hot. This method is really good, but you should be careful because of carelessness can accidentally damage the plastic body of the angle grinder or damage the gearbox of the tool.

Breaking the retainer with a torch or drill

If the retaining nut is too tight, it can be removed with a torch or power drill in chisel mode. The advantage of this method is that the angle grinder is not affected in any way and reworking of any tools is not necessary. To unscrew it, you insert a 6 mm drill bit in the tool. It should be set against the edge of the clamp, and by briefly engaging it, tear off the connection. The spindle of the angle grinder must be secured. This is probably the best way, if the clamp can not be removed.

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How to install it correctly?

Installing a blade on a power tiller is not that difficult. You can change it simply by following the instructions, although there are nuances.

angle, grinder, gets, bitten

The first thing to do is to mount the disc in the correct direction

It is especially important if it is a cutoff disc. Usually the side of the disc with the label and therefore its application area is slightly different from the other side

It may not be revealed immediately, but with prolonged intensive work the difference will not only be noticeable. it will be obvious.

On the side on which the label is affixed, put a wide pressure washer, it and the moving nut when it is screwed (disk installation). The nut slides on the polished surface of the washer, without it, it will be harder to torque or unscrew because the abrasive will hold the nut firmly and more force will be required

This is especially important if a disc needs to be replaced quickly or if it has broken (jammed)

Disc saws or other products that have teeth or a significant difference in the two sides are not normally a problem. For example, to fix a grinding disc in the opposite direction is not possible: it simply will not work.

Discs on a stone, including diamond, have a special indicator of rotation in the form of an arrow: installing them, you must take into account where the rod will rotate.

It is also important to consider the size of the blade when installing. Under no circumstances should you neglect safety and remove the protective cover. it is better to pick up the disc of appropriate diameter

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Sometimes “angle grinder” of smaller dimensions is put on the worked disk from a large machine. However, the worked disc tends to cut worse, the working surface is limited to about half the radius of the disc, the structure is slightly different. The disk burns faster and does less work. This operation may be justified if the stem diameter is the same. But it is impossible to change it back.

No debris must get under the disc when it is installed. Of course, the clamping nut can squeeze small objects, something will be pressed into the surface of the disc. But an imperceptible misalignment will cause a shift of the rotation plane and, as a consequence, a strong vibration of the whole mechanism, it may result in the disc destruction and, of course, one should not hope for an accurate cut in such a case.

The clamping nut must be unscrewed with the wrench supplied with the tool. In order to prevent the rod from rotating, it must be locked by pressing a special button. Unscrew the nut while holding the button depressed.

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After the nut is twisted, the disc is put on the freed rod, with the front side facing outward, and you must make sure it is set exactly into place.

In the set of a new “angle grinder” always includes a number of cardboard pads. when installing the disk to put them so that they were between the disk and the clamping elements. These spacers will help unscrew a broken or jammed disc.

Then turn the nut by hand up to the stop and tighten it with the special wrench. That’s it, the angle grinder is ready for use.

The first way

How to remove the disk from the angle grinder, if it is broken and tightly clamped by the clamping nut? Of course, you can try to use a special key for the angle grinder or a gas. However, judging by the reviews, making enormous efforts and spending time, the master may not get the expected result. It is easier and quicker to disassemble. To do this, use pliers to completely break the disk. Since small splinters will be flying during the work, the master will need protective goggles (mask) and gloves.

Then you need to take a metal plate, which is less thick than the disk. This plate will be used to grind off the remnants of the disc. For this you need to turn on the angle grinder, and the metal piece is securely clamped with pliers. After these steps the nut can be unscrewed even by hand.

What a way out of the problem is suggested by experts and amateurs

What is a gasket made of newspaper. This is a paper washer to the size of the nut. It is put on the installed disc and a nut is screwed on top. This piece of paper was a stumbling block, because the safety inspection has always broadcast the harmfulness of such a solution.

The installation of gaskets made of any other material is treated in the same way by the representatives of the safety authorities:

angle, grinder, gets, bitten

But there is a solution that does not contradict the safety requirements, and allows the normal installation and removal of the disc. This is a special nut, which consists of two elements. a nut and a pressure washer. The use of such a nut does not require any pads, because with it the disk does not jam.

If there is no special spanner handy, skilled craftsmen offer to do without a spanner. It does not mean that one can do without a wrench at all, but use a “gas wrench” or other implement. To do this, you need to clamp the retainer, clamp the nut with a gas wrench and unscrew it. This way you can replace a jammed disk, but this is a very inconvenient operation for one person.

There are also suggestions to clamp the disk by hand and unscrew it that way. Maybe, but it’s unlikely to change broken discs that way. It is better to use wrenches that are designed to remove and install discs.

Some foreign power tool manufacturers, such as Bosh, produce angle grinders with easily removable nuts. They securely clamp the disc to the tool shaft and are quick and easy to remove for disc replacement.

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The first way

How to remove the disk from the angle grinder, if it is broken and tightened by the clamping nut? Of course, you can try to use a special key for the angle grinder or a gas key. However, judging by the reviews, after making enormous efforts and spending time, the master may not get the expected result. Dismantle can be easier and faster. To do this, you need to use pliers to completely break the disk. Due to the fact that during the work will fly small splinters, the master will need protective goggles (mask) and gloves.

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

Measures to avoid jamming

So, now you know how to remove the jammed disc from the angle grinder, but you need to take care in advance about the safe use of the angle grinder to save yourself from having to take measures to eliminate abnormal situations.

Such measures include the following:

    Fit cardboard or plastic washers between flange, disc and spindle head. They will prevent the tool from jamming and if the disc is corked you can remove or melt it and easily unscrew the disc.

  • The assembly of the grinding wheel must be carried out correctly. To do this, the face must be placed on the supporting flange (i.e.е. picture to the gearbox). It must in no case be in contact with the jam nut. In that case, the washer that will keep it from jamming will be the standard ring of metal in the center.
  • On the clamping flange should be welded to the simplest nut, which will give the opportunity to press the installed wheel for cutting with the usual wrench.
  • Check tightening torque. You shouldn’t put too much effort into tightening the cutting element, as otherwise it will start to jam under heavy load.

It remains to learn about the safety rules.

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