How to install a grinding disc on the angle grinder

How to install the grinding disc on the angle grinder. Service angle grinder (grinders) with their own hands. Tips for repair and maintenance. Personal precautions when working with hazardous tools

I think the author is most likely the question “which side to put a disc on the angle grinder (angle grinder)?”which many people are interested in.

As for the action algorithm for replacing the disk, questions rarely arise, everything is in sight. use special key or a gas wrench and go. With the size of the disk is also difficult to miss, here just serves as a criterion for the size of the casing. Not unimportant parameter is the number of revolutions specified on the drive, here you need to choose in strict accordance with the manual angle grinder, disk what speed can be operated on it (speed indicated on the disk should be either equal or greater than the spindle speed, but in no case less than!)

I will not say on the cup-shaped disks. they are not otherwise put. Diamond discs and discs for cutting hard alloy stone, have an indication of the direction of rotation, or a pronounced tooth profile, in addition they have a metal base. and it is metal on both sides.

But not everyone knows which way to put the cutting disk label when installing. outward or toward the gearbox with the paper.

Some people are just convinced that there is no difference. But it is not. The disk is always placed with the label facing outward. Yes, someone will say that the direction of disc rotation is not strictly regulated by the arrow, almost always this arrow is absent, at least on abrasive discs (cutting) and also will be right.

This is not the case, there is no need for an arrow, if only for the following several logical conclusions.

On the side of the label there is a wide metal washer. Exactly it should be facing the moving flange nut, that is outwards (even if the disc is without a label). In case of disc jamming and breakage, the movable nut will be easier to unscrew if it slides on a metal washer. If you put the disk in reverse (washer to the gearbox) then the movable outer nut will be very difficult to unscrew on the abrasive part.

install, grinding, disc, angle

In connection with this seemingly obvious thing, and performed the structure of some cutting discs. They are less prone to kinking (and wear) if installed correctly. with the label facing outwards (and therefore a wide washer to the nut being clamped and not towards the gearbox)

P.S. Well, of course, to all the above, to work need to arm a suit of thick cloth (I have for these purposes tarpaulin apron) and safety glasses!

What do I need to use to install the disk?

In fact, the process of installing the disk in the angle grinder is not that complicated. However, in order to perform such work, you need to take into account certain rules and use certain tools.

In particular, it may be necessary to install:

  • The wrench that is used to loosen the nut.
  • Then you need the disk itself.
  • You may need a hole or a chisel. These tools should be used when a disc is jammed and has to be removed by deburring, which means that the residue in the gap can be removed with a chisel. You may not need these tools, but it is better to have them at hand.

What you need to use to install the disk?

In fact, the process of installation of the disk in the angle grinder is not that complicated. However, in order to do this kind of work, you need to take into account certain rules and use certain tools.

In particular, for installation you may need:

  • A spanner, which is used to unscrew the nut.
  • Then the disk itself is needed.
  • You may need a hole or a chisel. These tools should be used in the case when the disc is jammed and you have to remove it by opening it, which means that the remains in the gap can be removed exactly with a chisel. These tools may not be necessary, but it is better to have them on hand.

What you need to install the disk?

Installing a disc on an angle grinder is usually a fairly simple process, in which you need to follow a few rules. In order to make it, you need to arm yourself with the appropriate tool. a wrench, which will be needed to unscrew the nut. The next step after unscrewing it will be to replace the angle grinder disc or its initial installation. If it happens that the disc is jammed in the angle grinder, to remove it will have to crush it and extract the remains from the gap between the supporting flange and the nut with a flat screwdriver or chisel.

In order to determine which side to mount the disk, you need to consider several basic factors.

  • You can pay attention to the label. If the angle grinder works from itself, namely, turns away from the manager, in which case it is necessary to install the disc with the label inside. In the opposite direction of rotation, so the label must be set outward.
  • You can put it in without paying attention to the label. But then you can expect the most unpredictable results, such as the usual disc and angle grinder breakage. In this case, experts say that such negligence can lead to the fact that the angle grinder simply jam, and about the safety of talking in this case is not necessary.

In order to determine which way the angle grinder should twist, you need to refer to the safety information here. In particular, concrete should be cut towards yourself.

In this case, the sparks will fly from the side, namely from the manager. In general, cut materials in the direction away from yourself is not safe, because in the case of jamming, the angle grinder with a disc will fly exactly to the one who controls it. This has to be taken into account.

Which side to put the disc on the angle grinder

In most cases, the abrasive for the angle grinder is installed only in one direction, but in the situation when working with stone or concrete, the process changes. Therefore, it is necessary to consider these cases separately.

Depending on the situation, the disc is put in different ways

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For metal

How to properly place the wheel on the angle grinder. two factors affect:

  • Any abrasive has a special label glued on it that shows the side it should be attached to the angle grinder. If the angle grinder works away from the operator, as it should in most cases, then the disc should be installed with the label facing inward. When the angle grinder works in the opposite direction, the label is placed on the outside.
  • Of course, you can put the abrasive on either side without paying attention to the label. But in this case, unpredictable results, such as wheel breakage, must be expected.

Important! Experts assure that if you do not comply with the requirements of disk installation, then the angle grinder will one day jam, the disk may break, injuring the operator working with the tool.

install, grinding, disc, angle

For other materials

When working with concrete or wood angle grinder should rotate the disc in the direction of the person holding the angle grinder. In this case, the label needs to be pointed outward. These are isolated cases, and in most other cases, the grinder works away from the control.

Tips that do not stand up to criticism

On some cutting-off wheels, for example, on those designed to work with stone or tiles, there is a special arrow. It indicates the direction of rotation. In such a case, to advise otherwise would be foolish, which is quite logical. As for metal cutting abrasives, as a rule, there are no arrows on them. This is where the “superprofessionals” get fancy, handing out advice left and right.

The first logical chain of pseudo experts may be as follows. In the middle of the circle, on the side where the pattern is applied, there is a metal washer fixed by rolling. That’s right, there’s no arguing with that. But that’s not the point. This is followed by an explanation. “Look at the bead of the angle grinder where you put the disc, there are bumps on it. If you place the circle so that it is in contact with these irregularities with a metal washer, the defects are leveled. In the process of clamping the roughnesses will press against the ring, thus ensuring the best and most reliable connection. There will be no jamming of the abrasive during operation, it won’t rotate”.

The logic chain number 2 from the pseudo-specialists. “In the process of casting the wheel, small bumps form on it. The clamping nut of the grinder on the thread has backlash. It is by clamping it at the expense of smoothening irregularities.

Now for the most interesting part. According to the “experts”, if you look at the petal grinding disc, the inner metal ring is on the side of the petals. Accordingly, this part to the gearbox and mounts the abrasive on the grinder.

Carefully analyze the above advice and proceed to a complete rebuttal. Otherwise, more and more people will take the false information, which not only creates problems in the work, but can also cause injury.

Which side to put the disk on the angle grinder

In most cases, the abrasive for the angle grinder is set only in one direction, but in the situation when working with stone or concrete, the process changes. Therefore, it is necessary to consider these cases separately.

Depending on the situation, you put the disk in different ways

For metal

How to correctly place the wheel on the angle grinder. two factors affect:

  • On any abrasive glued a special label that shows the side in which it should be attached to the angle grinder. If the angle grinder is working away from the operator, as it should be in most cases, the disc should be mounted with the label facing inward. When the angle grinder works in the opposite direction, the label is placed on the outside.
  • Of course, you can put the abrasive on either side without paying attention to the label. But then you have to expect unpredictable results, such as disc breakage.

Important! Experts assure that if you do not comply with the requirements of the installation of the disc, the angle grinder one day will jam, the drive may break, injuring the operator working with the tool.

For other materials

When working with concrete or wood, the angle grinder must rotate the disc toward the person holding the angle grinder. In this case, the label must be pointing outwards. These are isolated cases, and in most other cases, the grinder works away from the control.

Typical disc sizes

When selecting a disc for your angle grinder, make sure that the outside diameter of the tool does not exceed the maximum allowed for your angle grinder. For example, if the angle grinder is designed to use a wheel with a maximum diameter of 125 mm, it must not be fitted with a 230 mm wheel. And there are several explanations for this:

  • the linear speed of the cutting edge will be exceeded, which is fraught with the destruction of the abrasive wheel and causing injury to the user;
  • the small angle grinder does not have enough power to work with large tools;
  • installing a tool that exceeds the allowable dimensions requires the removal of the safety guard, and this is already a violation of safety rules.

Discs for angle grinder have standard sizes: 115, 125, 150, 180 and 230 mm. In modern lathes, the seating diameter (diameter of the shaft on which the tool is installed) is almost the same and is equal to 22.2 mm. If you “stash” angle grinder obsolete model, you will need to apply adapters. rings of different diameters.

All abrasive wheels of all sizes have a special marking, from which you can learn the following information: disk diameter and thickness, the diameter of the seat, the maximum rotation speed, as well as for what materials it is designed to work.

The main difference between the two sides of the circle

On any disc for angle grinder, you can easily see the differences in the two sides of the wheel. One side is single-colored, it is covered with abrasive materials (to work with different types of metals). The front side has a special label, on which they write information about the characteristics of the cutter.

But the main difference between the two sides of the wheel is the presence of a metal ring. This is an important design element that affects the safety of use, and therefore deserves a separate mention.

What are the discs for angle grinder?? What kind of wheel to cut?

for angle grinder (angle grinder), you must first stick to the set for a particular model of cross-section.

This although a very fundamental point, as is often possible to increase the depth of cut or area of the workpiece, some craftsmen remove the protective cover and set a circle standard sizes.

All because of this very tool even more quickly burns out (gearbox breaks), and with a rather voluminous injury happens. There is a disc for the angle grinder has a limit on the maximum speed of rotation of another, simply put, at a speed of rotation.

The wider the cross-section of the wheel, the less the speed. It is by such a mistake often the huge discs at high speeds just burst, and taking into account the fact that with all this there is no protective cover, the consequences can be the most pitiable.

What are the discs for angle grinder in diameter

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There are 5 main modifications:

Very popular are the angle grinder, and therefore disk ∅ 125 and 230 mm. At home, in most cases small models are used, whereas more powerful and productive tool is used in professional work.

How to choose a drive on an angle grinder to work with different materials

The versatility of the angle grinder is that it can not only cut practically any material, but also to grind different surfaces and grind another tool for sharpening. The main thing is to choose the right disc. So what are discs for angle grinder?? The main groups look like this:

Again, there are several varieties in each group. Cutting discs can be abrasive, diamond and wood. The 1st, you are created for cutting metal, although there are also abrasive concrete discs.

They are distinguished by the components used in their manufacture, and the customer can distinguish them by the color on the information label (blue for metal, green for concrete), by the inscription (metal. “Steel”, concrete. “Concrete” as it is called from the schematic representation of a particular material.

Diamond cutting discs are provided only for stone, concrete or clay products. A more common question that arises in home craftsmen, which disc to cut tiles with an angle grinder? In general, for this purpose, we recommend circles with a solid coating without segmentation, grooves and slots, because they leave like a movie chipping on the enamel.

For working on metal

Depending on the material to be processed, different grinding discs are used for angle grinder. The most suitable is an abrasive disk. If you need to cut a thick iron pipe, then the diameter of the nozzle must be larger.

The universal rule is that you should apply a minimum of force when working, the weight of the angle grinder must be enough to successfully perform the task. Additional muscular impact will contribute to the rapid wear of the device and nozzle.

Metal cutting disc has a bonding base, it can be made of bakelite or vulcanite. The second has great elasticity, but because of the small heat resistance is not suitable for prolonged work.

Bakelite can withstand temperatures of 300 degrees, which causes sparks and reduces the strength of the circumference. It is bakelite nozzles are very popular among craftsmen.

Another performance criterion for the metal angle grinder is the diameter and thickness of the circumference of the nozzle. The number correlates with the number of rpm of the spindle and therefore the speed it develops.

F on the consumable wheel indicates the grit size, it is responsible for the neatness of the result. The larger the grit, the cleaner the machined surface. The grit is also responsible for how much steel will be removed after one pass.

Working instructions and safety precautions

Woodworking angle grinder requires a serious attitude and strict adherence to the rules of operation of the device and personal safety:

  • It is strictly forbidden to remove the protective cover during operation. If the blade breaks, it will prevent your face and body from being injured by broken shards.
  • To work with wood it is necessary to give preference to medium-powered models of angle grinder. In case the process fails and the tool jams, it will be much easier to hold it in your hands compared to a more powerful.
  • Grinding discs are much safer to use than cut-off discs. When using them, it is advisable to use a mask to prevent wood dust and fine sawdust from getting into the respiratory tract. It is also advisable to wear safety glasses.

Special clothing and protective equipment when sanding wood with an angle grinder Source kraskistroi.ru

  • When working with cutting attachments on the angle grinder for woodworking, you must strictly adhere to the right angle, otherwise the cutting will be uneven and the angle grinder can jam.
  • Do not use discs that do not match at least one of the parameters of the used angle grinder.
  • It is categorically forbidden to use discs with even minimal signs of damage, especially when cutting wood.
  • Do not install instead of a disk on the angle grinder on wood circles from a circular saw or other tools. Circular saw blades are designed for low operating speeds and the angle grinder can simply warp or break and fly away.
  • Before you grind wood with an angle grinder, it must be well dried. Wet wood is poorly suited to sanding, in addition, there is a high probability of its damage by mold and fungus.

Work rules and safety precautions

Woodworking angle grinder requires a serious attitude and strict adherence to the rules of operation of the device and personal safety:

  • Never remove the guard during operation. If the work disk breaks, it will prevent injury to face and body by splinters.
  • To work on wood, preference should be given to medium-powered models of the angle grinder. In the event of a malfunction and the tool jams, it is much easier to hold than a more powerful tool.
  • Grinding discs are much safer to use than cut-off discs. When using them, it is advisable to use a mask to prevent wood dust and fine sawdust from getting into the respiratory tract. Wearing safety glasses is also advisable.

Protective clothing and equipment when sanding wood with an angle grinder Source kraskistroi.see

  • When working with cutting nozzles on the angle grinder for woodworking, you must strictly adhere to the right angle, otherwise the cut will be uneven and the angle grinder can jam.
  • Do not use discs that do not match at least one of the parameters of the model of angle grinder used.
  • Never use discs that show even minimal signs of damage, especially when cutting wood.
  • Do not install instead of a disk on an angle grinder on wood circles from a circular saw or other tools. Circular discs are designed to operate at low RPM and on the angle grinder can simply warp or break and fly apart.
  • Before you sand wood with an angle grinder, it must be well dried. Wet wood is poorly amenable to grinding, in addition, the high probability of its damage mold and fungus.

How to make a grinder from an angle grinder?

Such a question can lead to confusion, because the angle grinder is. an angle grinder. But it is very versatile and for every operation it must be prepared. To prepare an angle grinder to perform grinding, you need to purchase a support wheel that is mounted directly on the machine shaft.

To process wood, you need to put sandpaper on this wheel. The number of sandpaper is chosen for the immediate moment of work. It is possible to find on sale both a grinding wheel of necessary diameter and abrasive wheels of appropriate size. They are also available with Velcro sanding discs, which are very easy and quick to change on the tool.

To convert our angle grinder to grind concrete, then it will be a good decision to buy a special protective cover-dust cover. It is good, because it has a nozzle for a vacuum cleaner. Well-known housings company produces Hilti. The hood of this company has a sliding sector, which opens part of the wheel for sanding in the corners.

Grinding with an angle grinder metals is usually done with standard metal grinding discs. They have different diameters, thickness and grit sizes. But if you’re going to grind an obscenely corroded surface, you must first pass it with a metal brush. Such brushes with the right diameters are also available.

Sanding wood

Wood is a unique material. He also grinds by hand quite well, but with an angle grinder you can achieve very good results. Some snobs argue that the angle grinder at all can not grind, but it’s from ignorance and inability to.

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The main secret is to use the sander at minimum speed. If the angle grinder has a speed switch, there will be no problems. At high revolutions the sandpaper will be very quickly and very tightly clogged with wood. In this mode it is not enough, and for five minutes of work. The optimum speed is max. 6000 rpm.

Another secret. do not sand the entire area of the circle. If you sand the entire surface, you will leave circular marks on the wood. To not leave any traces of sandpaper at all, or they would be minimal, it is necessary to sand only the upper sector of the circle. The movements of the machine should be along the fibers of the wood.

This method can get great results when sanding claddings. The board is smooth and does not leave tool marks. Just don’t get carried away and change the sandpaper on the wheel in time.

A log cabin is sanded in a similar manner. Here, it is desirable that the base plate is thin around the edge. With such a plate it will be easier to grind the narrow joints of the logs. Otherwise this work should be finished with a chisel.

READ Gear lubricant for Champion angle grinder

Working on concrete

If you can not buy a branded protective cover-dust cover with a nozzle for the vacuum cleaner, it can be made with your own hands. For this we take a used bucket from under putty or glue with a diameter a little larger than the circle of the angle grinder. Cut off the bottom at a height slightly greater than the assembled sanding block.

Cut a hole in the bottom to fit the gearbox and a hole for the plastic plumbing angle grinder. Now connect the vacuum cleaner hose to the nozzle and work in peace.

The grinding wheel must be suitable for grinding stone. It is preferable to grind concrete and concrete surfaces with the entire surface of the wheel. This will save processing time, and well level the surface plane.

When sanding the concrete floor it is necessary to constantly control the plane with a construction ruler, because due to the different density of the concrete it is possible to make hollows. For processing joints between concrete pours, it will be sufficient to achieve one level combination.

Concrete floors and surfaces can be ground very well with a Matrix diamond grinding cup. If the angle grinder is 150 mm, the cup is 125 mm.

Tips

If you had to use a gas wrench, you must remember about the very powerful arm of such a wrench and the force that is applied to the parts of the “angle grinder”. If you are not careful, you could break the spindle lock or damage the gearbox.

All manipulations with the disc of the angle grinder must be performed with the power supply completely disconnected (the plug must be taken out of the socket). Any inadvertent pressing of the start button will cause the electric motor to start, and the rotation speed of the rod is very high. Injuries in this case cannot be avoided.

Work with “angle grinder” involves a lot of waste in the form of metal or wood shavings and dust. Before you start working, you must wear special protective glasses: they will protect your eyes from the splinters of the cutting wheel itself in case it jams and destroys.

Goggles are not only needed as a safety feature. If your eyes are protected, you can pay more attention directly to the work of the “angle grinder”, ensure proper cutting or selection of the correct mode of operation. This allows you to make the most efficient use of your consumables (cutting wheels) and minimizes the risk of disc jamming or shattering.

A mask that completely covers your face is an excellent substitute for glasses; it is especially important for visually impaired craftsmen who wear dioptric glasses which are not suitable for safety glasses.

disc on the “angle grinder” can be set as “from itself” or “on itself” depending on the direction of rotation and, accordingly, the flow of chips. It does not make any fundamental difference in operation. However, the “angle grinder” with the wheel “on itself” has a tendency to jump out of the cut forwards, rather than to the person who is using it, when jamming the disc. This is especially important with high-powered tools, but a small angle grinder can also pose a serious risk.

A properly installed extension cord with socket, preferably without grounding, can help you quickly stop a machine that has escaped from your grinder.

“Angle grinder” is a tool of rough treatment and it is not necessary to strive to get 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 by other means.

To work without clamping and jamming long metal workpieces is better not to cut to the end, leaving in a cut 1-2 mm of metal: they will be easy to break off after, it almost does not affect the quality of the workpiece.

Small workpieces are better placed in a vise or clamped to a workbench or other reliable horizontal surface. Both cutting quality and safety depend on the tightness of the pressure.

On how to correctly place the disk on the “angle grinder”, you can see in the following video.

install, grinding, disc, angle

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

Everyone who has experience in intensive work with the angle grinder probably at least once, but faced with this situation.

Usually, it happens if the disk is clamped between the parts, it stops or breaks, and the motor of the angle grinder continues to rotate and thus irreversibly tightens the nut.

So what can you do if the disc on the angle grinder is jammed?

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

remove the disk from the angle grinder

First find out in which direction to unscrew the nut.

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

For this kind of work you need either two wrenches or two clamps.

Here’s what you need to do: destroy the remains of the disc, use one wrench to fix the washer located behind the disc, the other to unscrew the flange.

Remove the disk from the angle grinder

This method involves the use of the famous grease VD-40.

It’s probably like duct tape, applicable in all cases of life.

You need to spray the flange, wait about 5 minutes and try to unscrew it with a wrench.

remove the disk from the angle grinder

This method is used in extreme cases.

When no other methods help, you can try to saw the flange with such a tool as a hacksaw for metal, and then buy a new one in a specialized store.