How to install the diamond disc on the angle grinder

What side to put a disk on an angle grinder

Most professionals in repair and construction work today are familiar with the angle grinder or, as it is also called by the people, the angle grinder. It is used for processing a variety of materials, which include stone, reinforced concrete, concrete, marble and many others. Newbies at first may have a number of questions, among which the most common: how to properly install the disk on the angle grinder, how to mount the disk on the angle grinder, which side to put the disk on the angle grinder and in what direction should the disk rotate on the angle grinder. Let’s try to give a brief answer to all these questions.

What is needed to install the disk?

Installing a disc on an angle grinder is usually a fairly straightforward process in which a few rules must be followed. In order to perform it must be armed with the appropriate tool. a wrench, which will be needed to unscrew the nut. The next step after unscrewing it, will be the replacement of the disc angle grinder or its primary installation. If it happens that the disc is jammed in the angle grinder, to remove it will have to crush it and extract the remnants from the gap between the supporting flange and nut with a flat screwdriver or chisel.

Which side of the disk on the angle grinder?

What side to put a cutting disc may depend on several factors. First, if the disk is not flat, then you can put it in only one way, and the question disappears by itself. Secondly, if the wheel is still flat, you can be guided by the label. if the angle grinder turns away from yourself, it is installed with the label inside, if on itself, then, respectively, outward. If this principle is not followed, you can expect undesirable results. disk breakage during sawing or just its rapid wear and tear.

As for the direction in which the disc on the angle grinder rotates, this is primarily a safety issue. The assumption is that the concrete should be cut in the direction of the blade rotation or towards yourself. Ideally, sparks should fly from the side to the left of the one who works with the tool. If this is not possible, another position with a shower of sparks pointing downwards can be used. In any case, you can not allow a situation where sparks fly away from the user, as in the case of a sharp jamming of the disk, the angle grinder will be directed in its direction.

In other words, it is extremely unsafe to cut materials against the direction of disc rotation or away from yourself, because in the case of a wedge, there is a sharp ejection of the angle grinder in the direction of the one who works. By the way, if you have additional questions about how to install the disk on the angle grinder, you can also view training videos, of which there are more than enough on the Internet today.

If you still have questions or need advice on changing and installing discs just leave an application online or call us on the contact phone number and our experts will tell you how to do. For our complete range of diamond discs please see the diamond discs section.

How to correctly place the diamond disc on the angle grinder

Most experts on repair and construction work today are familiar with the angle grinder or, as it is also called by the people, the angle grinder. It is used for processing a variety of materials, which include stone, reinforced concrete, concrete, marble and many others. In beginners at first may have a number of questions, among which the most common: how to properly install the drive on the angle grinder, how to mount the drive on the angle grinder, which side to put a disc on the angle grinder and in what direction should rotate the drive on the angle grinder. Let’s try now to give brief answers to all these questions.

What you need to install the disk?

Installing the disk on the angle grinder, as a rule, is a fairly simple process in which you need to follow a few rules. In order to perform it, you must be equipped with the appropriate tool. a wrench, which will be needed to unscrew the nut. The next step after unscrewing it, will be the replacement of the disk angle grinder or its primary installation. If it happens that the disc is jammed in the angle grinder to remove it will have to crush it and extract the remnants from the gap between the supporting flange and nut with a flat screwdriver or chisel.

Which way to put the disk on the angle grinder?

Which way you put the cutting wheel can depend on several factors. Firstly, if the disc is not flat, there is only one way to place it, and the question disappears by itself. Secondly, if the circle is still flat, you can be guided by the label. if the angle grinder turns away from yourself, it is installed with the label inside, if on itself, then, respectively, outward. If this principle is not followed, you can expect undesirable results. disk breakage in the process of sawing or simply its rapid wear.

As for the direction in which the disk rotates on the angle grinder, then it is primarily a question of safety. It is believed that the concrete should be cut in the direction of rotation of the disc, or on itself. Ideally, the sparks should fly to the side to the left of the person working with the tool. If you can not do this, you can use another position, when the shear of sparks is directed downward. In any case, do not allow the sparks to fly away from the user, because if the disc jams suddenly, the angle grinder will be directed in his direction.

In other words, it is extremely unsafe to cut materials against the direction of disc rotation or away from yourself, because in the case of a wedge, there is a sharp ejection of the angle grinder in the direction of the one who works. By the way, if additional questions arise as to how to install the disk on the angle grinder, you can also view training videos, of which there are more than enough on the Internet today.

See also  How to put a speed controller on an angle grinder

If you still have questions or need advice on changing and installing the discs, just leave an application on the website or call the contact phone number and our specialists will tell you the right way to proceed. Our complete range of diamond discs can be found in the diamond discs section.

How to choose the right diamond disc for the angle grinder

Angle grinder (angle grinder), in simple terms. angle grinder, is indispensable for construction and repair work of any scale. But, like other tools, it is equipped with interchangeable parts that require periodic sharpening or replacement. In angle grinders, the grinding discs are such a part. There are simple and diamond. The latter are chosen more often, because they have a number of advantages over conventional. To know how to choose a diamond disc for an angle grinder, you need to read the information about it.

Different materials require different angle grinder bits and discs.

How to choose?

You need to choose a disk taking into account the type of work you plan to do. Every diamond wheel consists of a steel body and a diamond cutting edge. It is the execution of the edge that divides diamond tools into several types:

Cutting with a diamond wheel produces a smooth, jagged, and splinter-free cut.

  • A solid cutting tool enables nearly loss-free cutting of the material. the cut is perfectly even, and this is important for ceramic and marble materials. It needs to be watered down for cooling while working. For this purpose, devices for forced water supply are created. The liquid cools the disc, so the operating time increases (it does not overheat).
  • Segmented cutting disc has peculiar cutouts (looks like the petals of a flower), which serve the function of cooling. But you can’t avoid the disc heating, every 1.5 minutes the angle grinder has to be switched to idle for cooling. Segmented diamond tool is used for dry cutting hard materials (brick, foam block, stone). Gaps between the segments are called flushing grooves. It is the water that flows through when cutting with water and cools the disc. Air takes care of the cooling function in dry cutting.
  • There is also a third kind. combination tool. It can be considered as a universal tool, because it can work dry and with water supply. Still, experts recommend buying a separate tool for each type of work, rather than using a combined tool.

The body is made of steel, which is hardened under the influence of high temperatures during production.

Diamond tools: Recommendations for choosing

The disc diameters for angle grinders are from 115 mm to 400 mm.

If the need arises, even glass can be cut with an angle grinder. Diamond discs are available for special applications. Read the information on the packaging carefully when purchasing the product. Usually manufacturers specify for which materials the disc is intended. It is advisable to use a diamond disc in accordance with the manufacturer’s recommendations. this will prolong its service life.

Blades for cutting hard, high-density materials have a softer metal housing. As they are erased, they release a new batch of diamonds to replace the worn out. Products for soft materials have a hard metal body, because the diamond part wears more slowly, and the wear process of the body and the diamond part should go evenly.

What you need to use to install the disc

The operation is quite simple and will not take more than a few minutes if you choose the right manual. But in order to perform this type of work, it is necessary to adhere to the basic rules, and use a special tool.

  • A special wrench that can be used to unscrew the nut that holds it to the angle grinder. It comes with the equipment, and if it is lost, the key can be bought in a construction store.
  • The abrasive itself to replace the old one.
  • In some cases, you have to use a chisel or other similar hard object. This tool is needed in case the cutting disk was jammed during work. In such a situation, there is nothing left but to crush it to make a replacement. Residues of abrasive can get into the gap, so you need to remove them so that the new disc does not interfere with the splinters. In most cases, it is not necessary to use these devices, but it is desirable that they are always near.

Having decided on the tools that will be needed for replacement, you can move directly to the installation:

  • There is a metal ring on top of the abrasive to hold it in place. The ring has two holes and the key has two pins that match the dimensions.
  • The key should be put on top, in the ring holes, and turn counterclockwise. If the disc has not been changed for a long time, the ring may stick (not move with the operator’s effort). In this case, the key will have to be extended with any tube and try to unscrew the ring again.
  • After removing the old disc, place the new disc in its seat. Put the metal ring on top and screw it clockwise with a wrench. It is desirable to press the key again to check whether the abrasive is fixed.

Important! Do not apply great force when tightening, otherwise there is a risk of damaging the disc wheel.

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, the disc is mounted in different ways

For metal

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

  • On any abrasive glued a special label that shows the side on 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, then the disc should be installed with the label inside. When the angle grinder is working in the opposite direction, the label is 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 disk installation, then the angle grinder one day will jam, the disk 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 in the direction of the person holding the angle grinder. In this case, the label should be directed outward. These are isolated cases, and in most other cases, the grinder works away from the control.

Which side to put the disk 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. So we need to consider these cases separately.

Depending on the situation, the disk is placed in different ways

For metal

How to correctly put 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 is working away from the operator, as it should be in most cases, then the disk should be installed with the label inside. When the angle grinder works in reverse, 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 you should expect unpredictable results, such as disc breakage.
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Important! Experts assure that if you do not comply with the requirements of the disc installation, then the angle grinder one day will jam, the drive can break, injuring the operator, working with the tool.

For other materials

When working with concrete or wood angle grinder should rotate the disk in the direction of the person who holds the angle grinder. The label should be facing outward in this case. This is an isolated case, and in most other cases, the grinder works away from the control.

Tips that do not stand up to criticism

On some cutting discs, for example, those designed to work with stone or tile, there is a special arrow. It indicates the direction of rotation. In that case, to advise otherwise would be foolish, which makes perfect sense. As for metal cutting abrasives, as a rule, no arrows are put on them. This is where the “superprofessionals” get fancy, giving out advice left and right.

The first logical chain of pseudo-experts might be as follows. In the middle of the circle, on the side where the pattern is drawn, there is a metal washer secured by rolling. That’s right, you can’t argue with that. But this is not the point. The following is an explanation. “Look at the washer of the angle grinder, where you put the disk, it has pimples. If you put the disc so that it is in contact with these bumps with the metal washer, the defects are leveled. In the process of clamping the roughs will press against the ring, thus ensuring the best and most reliable connection. There will be no jamming of the abrasive during operation, it will not turn”.

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 has a backlash on the thread. It is at the expense of it when it is clamped that the irregularities are smoothed out.”.

Now for the best part. According to “experts,” if you look at a petal grinding disc, the inner metal ring is on the petal side. Accordingly, this part to the gearbox and the abrasive is mounted 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 will not only create problems in the work, but also can cause injury.

Grinding wheels

In fact, there are special machines for sharpening tools. sharpening. However, the rotating grinding wheel is able to straighten a blunt axe or crumb than a grass brush or grass scythe. Considering the wishes of craftsmen, the industry produces grinding wheels for 115 and 125 mm grinding machines.

Grinding wheels turn a grinder into a sharpener

Disks are made of coarse abrasive, compressed into a thick plate (more than 5 mm) with a convexity in the center. If such a disc is mounted on a spindle, the flange is hidden in a recess and does not protrude above the plane of the disc. Rough sanding discs are also used for cleaning welds.

Scrubbing brushes and discs

Craftsmen who repaired houses in the middle of the last century were faced with removing oil paint from walls. Wire brushes are suitable for this kind of work.

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No paint can withstand this steel cup

Brush. Is a cup with steel or brass braids around it. They differ in the thickness and stiffness of the wire. For coarse and fine peeling. The brush is screwed onto the spindle with an M14 thread.

Scrubbing brushes and discs

Craftsmen who repaired houses in the middle of the last century were faced with removing oil paint from walls. Wire brushes are suitable for this application.

No paint can withstand such a steel cup

Brush. Is a cup, around which the steel or brass braids. They differ in the thickness and stiffness of the wire. for coarse and fine flaking. The brush is screwed onto the spindle with an M14 thread.

Step-by-step guide

The disc is mounted on the grinder spindle with an M14 threaded flange. To unscrew the flange, a grinding wrench is provided. Its studs cling to the holes in the flange.

The spindle must be locked to unscrew the flange. A latch is made on the side of the housing opposite the disk for this purpose. When the key is pressed, the pin enters the hole in the idler gear and prevents the spindle from turning.

Insert the open key into the holes in the flange. Press the lock button with your right hand while turning the key counterclockwise with your left hand and remove the flange from its place.

Key is inserted into the flange holes.

Our grinder rotates clockwise. If you have a different direction, keep in mind that you need to rotate in the direction of rotation of the blade.

If the flange dries out, unscrew it by hand, remove it and put it away.

Remove the old disc. We don’t need it anymore, you can throw it away.

Intense spraying creates a cut-off of scorched metal particles and abrasive on the inside of the body. Use a steel brush to clean the body.

Place the bottom flange on the spindle, making sure that the flats on the flange align with the grooves on the spindle. Put the gasket on top.

Bottom flange and gasket supplied

If the gaskets are not attached to your grinder, this washer can be cut from cardboard or tin.

Put disc in place, close second gasket.

Thanks to the spacers, if the disc gets stuck in the material and breaks, you can still easily unscrew the flange.

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Manually tighten the upper flange counterclockwise (in our case clockwise) while holding the abrasive disk. With the right hand we hold the lock button and turn the hand until we feel resistance. Insert an open wrench and turn a little more, no more than a quarter turn. Do not overtighten the flange, the disk will be deformed.

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Disc replaced, angle grinder is ready for use

This is a complete disc change, you can continue sawing. Sometimes, when changing the disc, obstacles get in the way of the craftsman. What to do in these situations. let’s see further.

The main difference between the two sides of the disk

On any cutting disc, the two surfaces are clearly distinguishable. One of them (back side) is monochromatic and is formed by abrasive material. The second (front) one has a label with basic information about the characteristics of the blade. But the main distinguishing feature of the two surfaces is the presence of a metal ring on the obverse side.

Metal washer (ring) is designed to protect the integrity of the disc when it is tightened by the moving flange nut, as well as to increase the area of the bearing surface. In addition, the metal washer prevents the cutting wheel from “sticking” to the nut surface, which greatly facilitates the replacement process.

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Advantages of installing a disk with a ring to the angle grinder

Cutting discs do not have a pre-programmed direction of rotation. That’s why it doesn’t matter which way they are installed. But as mentioned above, installing a disc with its face outward makes it easier to replace it (it’s much harder to unscrew the nut on the abrasive side). There are several other advantages to this mounting arrangement.

Ensures smooth installation on the shaft

The metal ring increases the support area. So when the disc is mounted on the shaft and the nut is tightened, the pressure is evenly distributed. This ensures that the cutting wheel is positioned evenly and reduces the risk of damage due to torsion.

Comfortable mounting of the disc

Installation of abrasive wheel face outward provides yet another advantage. you can always visually see exactly what attachment (for metal or stone) is installed at the moment on the angle grinder. They are not interchangeable and a mistake is highly likely to have serious consequences. For example, when trying to use a metal cutting disc to cut through concrete, it can be destroyed and injure the craftsman with the resulting pieces. Therefore, mounting the abrasive wheel with the label facing outwards ensures not only convenience, but also safety.

The prescription of the manual

The instructions for many angle grinders, such as the Metabo WP 850, clearly state that “the metal flange of the abrasive cut-off wheels must rest against the supporting flange”. Manufacturers make these recommendations for a good reason, as they ensure safe handling of the tool, and reduce the risk of serious injury to the machine operator.

The advantages of mounting a disc with the ring on an angle grinder

There is no exact direction to follow when mounting the wheel on the grinder. But, as already described above, if you put the cutter “face” outward, the removal process will be easier, because the abrasive side is more difficult to catch on the surface.

There are also a few other advantages, of which it will be useful to know.

Guaranteed flat installation on the shaft

The metal ring integrated in the disc increases the contact area, so the pressure during tightening is even. That way, the disc sits on the desired surface as straight as possible. The possibility of misalignment is eliminated. This directly affects not only the smoothness of the cut, but also the safety of the user. the abrasive will not fly to pieces if the angle grinder does not cling.

Convenient installation

Another advantage of mounting the disk face outward. the user will always be able to see which tool is mounted on the angle grinder. You have to use different blades for work with stone or metal, and if you make a mistake, you can get seriously injured because the cutting part will break.

For example, if you use a disk on metal to cut concrete, the abrasive simply can not withstand the load and fly in pieces in different directions. Therefore, the installation variant under consideration provides not only convenience, but also safety.

According to the manual

On some grinders, for example Metabo, it is specified that the metal flange of the abrasive must be adjacent to the supported flange of the angle grinder. There is a reason why manufacturers recommend mounting the disc in this way, as they expect safety when working with the tool.

Important! Life-threatening if not installed correctly.

Is there a significant difference from the direction of rotation

The direction of rotation can be reversed, both toward and away from you. These variants have advantages and disadvantages. If the abrasive is pointed away from the operator, sparks and dust are flying toward the operator, causing discomfort at work. There is also a risk of eye burns and clothing ignition.

Sparks when working with an angle grinder

If the disk rotates on itself, then you can get rid of these disadvantages. But in such a variant there is a risk of serious injuries. If the abrasive is jammed in the process, the tool will hit the operator’s hands or face hard.

There is no single rule for setting the rotation, and if it is important, the information should be indicated on the tool itself. In any case, the direction of the machine must be chosen by the operator himself, depending on the material to be processed, as well as for his convenience.

The provided information is enough to understand which side to put the disc on the angle grinder and why it is important to install the abrasive correctly.

Is there a significant difference from the direction of rotation

The direction of rotation of the cutting wheel can be both “on itself” and “away from you”. Each of them has its own advantages and disadvantages. So when you rotate the disk “away”, dust and sparks fly on the operator, which creates additional difficulties in the work, with possible burns of the eyes, skin, clothing flares. Turning the disk toward you” does not have this disadvantage. But in this case there is also a higher risk of injury. After all, if the disc jams, the tool will fly with force into the operator’s face. There is no single rule in which direction the cutting wheel should rotate. If this is important, then the information is necessarily indicated on the tool. In all other cases, the direction of rotation is chosen by the operator, taking into account the type of surface to be worked, convenience and experience.

Installing the disc on the angle grinder is usually a fairly simple process in which you need to follow a few rules. In order to do it, you must be armed with the appropriate tool. a wrench, which will be needed to unscrew the nut. The next step after unscrewing it, will be the replacement of the angle grinder disc or its initial installation. If it happens that the disk is caught 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.

How to remove a jammed disc from an angle grinder

Using new nuts solves the problem of removing the disk, but what to do with an already jammed disk? Even if the disk was installed correctly, it is not always possible to remove it. Practice tells us different ways to solve the problem. It is possible to clamp a locking pin and to hit it through a superstructure on nut holes in the unscrewing direction. This option is only possible with a functioning retainer. But the latch may not endure such a solution and break.

The second method is more logical. There is a gearbox shaft with chamfers under the jam nut and bottom support washer. The bottom support washer is put on them. A standard wrench can’t fit there because it’s too narrow. But it is possible to take an ordinary open-ended wrench by “17” and grind it on both sides.

The wrench fits in the gap and fits over the chamfers on the shaft and secures it. Now with any wrench any nut will be unscrewed, and the disk or its remains removed from the angle grinder.