Accessories for an angle grinder – you can buy them, but it’s better to make them yourself. Homemade grinder from improvised tools Options for attaching handles

Corner Grinder, simply “grinder”, has three main areas of use.

• cutting hard materials;
• Grinding with abrasives;
• Cleaning surfaces with brushes.

The technology involves holding the angle grinder with your hands while working.

However, for convenience and expanding the capabilities of the tool, many devices have been invented. Let's carry out short review:

Tripod for angle grinder

Industrial tripods for mounting angle grinders. Allow to make an ordinary grinder cutting machine.

This mini machine solves the main problem when working with an angle grinder: if you hold the tool with both hands, it is extremely difficult to fix the workpiece. In this case, an angle grinder with a cutting disc is controlled with one hand, and with the other you can hold and move the piece of metal being cut.

Moreover, the tripod allows you to install correct angle cutting, and the disk moves strictly vertically. The work is done efficiently and safely.

Craftsmen have long learned to make accessories for grinders for cutting metal and other solid compact workpieces on their own.

The frames are assembled from metal profiles, automobile shock absorbers, or even plywood. A well-made machine is no less reliable and safe than a factory one.

IMPORTANT! When working with any machine - factory or homemade, you must remember the correct position of the protective casing.

If your structure is strong enough and provides operator protection, you can use a tripod for sawing wood. The main thing to remember is safety.

In this case, main reason injuries - an uncontrollable grinder that escapes from the hands when the disc gets jammed in the wood has been eliminated. But the disc itself can still cause injury.

Homemade tripod for fixing the angle grinder.

Therefore, when manufacturing such a device, it is better to make the switch non-fixed. For example, in the form of a foot pedal. Then you can instantly turn off the power if the device gets out of control.

When there is no need to work with wood, but only need to cut a large number of metal blanks – there are more simple options.

Such a mount can be made in an hour, and the ease of use will increase by an order of magnitude. If you know how your hands “fall off” after cutting fifty pegs from a metal corner, this design is for you.

Clamp for grinder

The second most popular way to add convenience when working with an angle grinder is to fix the tool motionless on a workbench or in a vice.

The advantage of homemade products is that at any moment the tool can be removed from the device for its intended purpose. The shaft of the grinder is brought out into the hole of the workbench, a cartridge for milling heads– and you can process wood that is not too hard.

Hello to all DIY lovers! In his Everyday life One way or another, we use various power tools, and in particular an angle grinder. This is very universal tool, since in addition to cutting discs, grinding discs can also be installed on it. The service life of such grinding discs quite small, they wear out very quickly, but their outermost part wears out the fastest, and it’s the most convenient for sanding or cleaning. Therefore, after the outermost part of the disk has worn off, do not rush to throw it away. This disc can be given a second, or even a third life.

Restoring a grinding disc for an angle grinder

As we can see in the photo above, the edge of the disk is very worn and the quality of grinding has deteriorated, and in order to restore it, you need to take an electric sharpener and simultaneously run the sharpener and the disk to grind off the worn part.

Such a procedure, on one disk, can be performed up to two times, personally verified. After that, the quality of grinding increases.

But if the petals of the grinding disc have fallen off, as in the photo below, then you shouldn’t throw away such a disc either.

The first step is to independently separate all the remaining petals from the disk and clean the base.

Next, take a regular piece of sandpaper (WARNING! Do not take sandpaper on paper based, only on a rag, since paper does not withstand high speeds) , attach the disc, circle and cut with scissors.

After that, we make a hole in the middle, apply emery wheel to the grinding disc and put on the angle grinder.

After this, you can completely calmly clean the necessary parts and the quality will not be inferior to a regular grinding disc.

Production of grinding discs for boron machines

Also, in addition to angle grinders, we quite often use a drill with small cutting discs, but the quality of such small discs is very poor, they break even from the slightest blow, so you can make such small discs from a broken large one. Just apply a small disk, trace it, cut it out with metal scissors, make a hole in the center and you can use it.

From one broken disk you can get up to 10 small pieces, depending on the size and quality and strength they will be much better. These discs can be used to saw off fairly thick metal and will wear out less.

This hand tool has become indispensable in various fields, especially in construction and metalworking. With its help, labor productivity increases. The emergence of a large number of different attachments has led to a significant expansion of the functionality of the device.

But not all workers who regularly use it in their work know how to use an angle grinder correctly. It should be borne in mind that failure to follow the basic rules for safe handling of an angle grinder can result in very dangerous injuries, sometimes resulting in death. Following the operating instructions will help to avoid this. An important place in preventing injuries is the serviceability of the tool, the use suitable means personal protection, as well as right choice discs for cutting and grinding various materials.

Operations that can be performed using an angle grinder

The grinder is a multifunctional tool. The drive mechanism in it is an electric motor, which through a gearbox transmits movement to a shaft with a replaceable attachment attached to it. General form The device is shown in the photo below.

There are models on the market that differ in power and design:

Angle grinder (grinder) FT-1318

Professional large angle grinder 230mm Stern AG230B

Powerful devices are powered by three-phase voltage 380 V, and household ones - from a single-phase 220 V network. There are also low-power battery models.

An angle grinder (angle grinder) can be used with various materials the following main types of work:

• cutting;
• grinding;
• polishing.

If you fix the grinder motionless, you can sharpen it on a wheel different instruments: cutters, drills, knives, etc.

The angle grinder is designed to work with the following materials:

• concrete;
• metal;
• tree;
• glass;
• ceramic tiles;
• stone;
• brick;
• plastic.

Bulgarians have become widespread both in everyday life and in industrial conditions. This is due to their wide functionality, due to the following factors:

• a large selection of different nozzles from different materials to perform various operations;
• Possibility of fixed fixation using special fastening devices;
• the presence in some models of additional handles and several speed modes of operation.

At the same time, you must always remember that only special discs are used to process each material.

What is the danger of an angle grinder

The angle grinder is a traumatic tool. This is caused by for the following reasons:

• high speed of rotation of the working nozzle - it exceeds 10,000 rpm;
• openness (unprotected casing) of most of the disk;
• possibility of breaking the abrasive disc into fragments different sizes, which at the same time scatter to the sides at considerable speed;
• frequent lack of opportunity proper organization workplace;
• the formation of small particles when cutting metal (or other material) or grinding.

When the disk jams, which occurs even due to its slight misalignment, it is almost impossible to hold the grinder in your hands, especially a powerful tool. This is caused by the high speed of rotation of the nozzle. Therefore, beginners are recommended to work with low-power models equipped with discs with a diameter of 115-125 mm. The latter must be free from the slightest defects that could lead to their sudden destruction and tearing of the angle grinder out of your hands with uncertain consequences.

General safety rules

To reduce the possibility of injury when working with an angle grinder, this tool must be handled correctly. The following rules of use must be observed:

The safety measures outlined were developed by manufacturers of angle grinders, as well as special organizations (services) involved in activities in the field of labor protection.

To ensure work safety, it is better to purchase not the cheapest ones, quality materials from reliable manufacturers.

A person working as an angle grinder must be adequate and in a balanced psychological state.

Protective agents used

The following personal protective equipment must be worn by the user while operating the angle grinder:

• protective mask or goggles covering the eyes on all sides;
• gloves made of thick fabric or leather;
• special shoes (intact, durable) and work clothes;
• a respirator that will provide protection against the penetration of small particles into the respiratory system when cutting concrete, glass or ceramic tiles, brick, porcelain tiles, foam blocks, stone and other dusty materials.

To work with an angle grinder, the use of protective equipment is mandatory. This helps you work more safely.

How not to work with an angle grinder

Safety precautions when using angle grinders should come first. According to it, it is prohibited:

• perform work manipulations without PPE;
• works in light clothing that does not completely cover the body (arms, legs);
• use a machine that is not equipped with a casing to protect against sparks;
• without checking the functionality of the tool at idle, start using it;
• work with a disc that is defective or unsuitable for the material;
• be located in the cutting plane;
• press hard on the tool;
• work so that the direction of rotation of the circle is towards the operator;
• perform work without taking breaks, because your hands get tired and it’s difficult to hold the grinder firmly;
• so that the workpiece being processed is not fixed (for example, in a vice or clamps);
• use the side of the disc to sharpen metal parts;
• cut workpieces whose thickness exceeds half the radius of the circle used;
• finding unauthorized persons in the working area;
• touch the attachments until they have cooled down, because they become very hot during cutting and grinding due to friction;
• when deepening the circle into the workpiece, turn on the tool;
• grind with thin discs;
• use attachments larger diameter than calculated angle grinder;
• position the workpiece so that when cutting, the circle is clamped (the cut should be for breaking, not for squeezing).

Safe use of the saw in an angle grinder is ensured by the fact that it is replaced only when the device is disconnected from the network.

Which direction can you cut with a grinder?

Before you start cutting the material, you should figure out which way the grinder should turn: with sparks away from you or toward you. There is no clear answer among users; they work in both ways. If the nozzle rotates counterclockwise, then the sparks (as well as the broken circle) fly in the opposite direction from the operator, but the tool will recoil during jamming to the user. In the second case, everything happens the other way around. For safety reasons, it is considered that correct rotation is when sparks fly towards the operator, because when jammed, the tool will jerk in the opposite direction.

In any case, manufacturers recommend that the movement of the angle grinder and the rotation of its wheel be directed in the same direction. This significantly reduces the possibility that the disc will come out of the slot during the working process. But with this method, the markings on the material are often hidden by flying sparks.

You can change the rotation of the nozzle by moving the handle and casing to the other side. This is the simplest option (if it is possible to do so). A more difficult way is to make changes in electrical diagram devices. But this doesn't always help.

An important point is to ensure correct position working tool: the cutting line must be located on the side of the operator. Then, if the nozzle suddenly jams, the angle grinder will be pulled to the side.

When cutting, it is necessary that the working plane does not change, and that there are no distortions. Discs must be used in accordance with the material being processed. Thus, concrete, tiles, and stone are cut using diamond-coated circles of different diameters.

The nuances of cutting some materials

• before work, check for the presence of pipes, fittings, and electrical wiring embedded in concrete (with a metal detector or devices for searching for wiring);
• to reduce dust, work surface moistened with water (for example, from a spray bottle or brush);
• periodically cool the cutting element with air or water.

In the absence of a tile cutter, a grinder can also be used to cut tiles. Experts even cut circles into the tiles. Stone and tiles are cut in two ways:

• wet (wet the work area with water);
• dry (without moisture).

With the first option, cooling improves, but dirt remains, and with the second, a lot of dust is released. Wet method used for large volumes of upcoming work, and dry - for one-time cutting.

Any material should be cut smoothly so that the disc is immersed in it with little pressure, almost only under the influence of the angle grinder’s own weight. This is necessary to prevent distortions of the disk and reduce the likelihood of it jamming. If the process slows down, then it is necessary to replace the nozzle with a new one.

The grinder should be used in accordance with the operating instructions and safety regulations. The working part must rotate in the direction of movement of the tool. Before starting the process, be sure to turn on the device at idle speed. At the same time, there should be no vibration, heating of the angle grinder, as well as extraneous sounds from it. The circles must be used without damage. The most dangerous factor is the kickback. To prevent this, it is necessary to avoid jamming of the wheels by cutting materials to break.

tehnika.expert

What you need to know about the Bulgarian

What you need to know about the grinder 09/10/2012What you need to know about the grinder Posted on 09/10/2012 in Plumbing tools, Plumbing

The angle grinder, or, as we often used to call it, the grinder, came to us, oddly enough, from Bulgaria in the 1970s.

In general, grinders (or grinders) are a rather broad concept. But I will tell you about the features of working with an angle grinder from the point of view of a plumber. I will share examples from my experience. And I’ll say a few words about safety precautions when working with the tool.

Conventionally, for myself, I divided grinders into three types: small, medium and large. (We do not take into account very large ones)

The best combination, in my opinion, is to have a large and a small grinder at work.

A small grinder is very convenient to get into narrow places, it is lighter and safer (it is easier to hold it). A medium-sized grinder is the same alternative when you don’t have a large one, and you can’t cut through a small one. Well, the larger one is designed for cutting large pipes (it has a large cutting depth). Those. has a larger diameter disk and, accordingly, a deeper cut is obtained, which is important when working with large diameters.

So which one to choose? - you ask. Here you can answer the question with a question:

– How often are you going to use it?

Once or twice for household needs or every day (professional need)? If you need an angle grinder for a one-time job or you are buying it just in case, then buy a household one. It's inexpensive, and if you have to work all day, just let it cool every half hour.

If for household needs you want a more reliable grinder (so as not to overheat), then I recommend taking a small grinder at a price of 3-4 times cheaper. Large cutting machines are rarely needed for household purposes. If you work with pipes, then with a small grinder you can cut pipes up to a diameter of 50 mm (with a 125 mm disc). When buying inexpensive grinders, you need to keep in mind that it will not last long, because it is made of cheaper materials.

The first thing that usually “flies” household grinders during intensive use, these are gearbox bearings.

10 points to pay attention to when buying an angle grinder for permanent work

The disk rotation speed is on average 6 – 11 thousand revolutions per minute. Some spin faster. When purchasing an angle grinder, it would be useful to understand whether you will need to adjust the rotation speed of the blade. For example, if you need to sand something that melts or even ignites when high speed, as I often have to do, then adjusting the speed will be very useful.

2. Power = endurance.

The more powerful the grinder, the more durable it will be. Professional grinders are usually an order of magnitude more powerful than household grinders, making the tool easier to work with and requiring much more time to overheat.

3. Soft start system.

Many powerful sanders in the more expensive segment are equipped with an electronic system that smoothly starts the disc. Those. The disk does not turn on instantly, but with a current limitation and, with increasing speed, the current increases to the maximum. Although this happens quickly and to determine whether there is such a system in the angle grinder you will need to turn it on. If the grinder does not jump out of your hands when you turn it on, the system is working. However, do not confuse the soft start system with a weak angle grinder. There are grinders themselves that are not very powerful. They start with a slight jerk and spin up for a few seconds. But as soon as you touch the work material with such an angle grinder, the speed drops significantly.

4. Maintain rotation speed.

Some angle grinders are equipped with a system that allows you to maintain optimal disc rotation speed. Those. when cutting material, the speed of rotation of the disk will not depend on the load, on how hard you press on the grinder. (Naturally, we are talking about pressure within reasonable limits, because this may be unsafe)

5. Turn off the brushes when the power is turned off.

Many professional grinders are equipped with a system for turning off the brushes in the event of a sudden power outage. For example, if the power was turned off during operation, the angle grinder will not start working when it is turned on. It must be turned off and on again. It happens that during operation the power is interrupted, and the master forgets to turn off the angle grinder and goes to look for an open circuit or the reason for the shutdown. If the electricity suddenly turns on, the angle grinder with such a system will not turn on in the absence of the master and will not start sawing everything around it.

6. Protection against accidental activation.

Most grinders are equipped with a safe power button. To start such a tool, you need to push the lever forward and only then press the button.

7. Stopping when the disc breaks and clamps.

Some grinding machines have a system that detects a disk rupture and turns off. This grinder will also turn off if the disc starts to jam. You don’t have to pull out the machine and the risk that the disc will fly apart is minimized.

8. Disk balancing.

Expensive grinders can automatically balance the disc. When cutting, very often the disc wears unevenly. To avoid strong vibrations during operation, the spindle has a clever bearing that balances the uneven disk.

9. Options for attaching handles.

The machines come with a fixed main handle and an additional handle that can be unscrewed. And there are grinders where this very handle can be screwed in from the other side or from above.

10. Vibration protection.

In expensive versions, the handles are made of vibration-proof material, for more comfortable work. This is important when working with the machine for a long time. In addition to all this, professional grinders are made in a durable and waterproof case, which is important in plumbing.

Safety precautions

Never neglect safety precautions when working with a grinder. At the end, I will tell you a real case from my practice. But in order.

1. Protective cover.

The protective casing, in the event of a disc rupture, will prevent serious injury, although it does not guarantee 100% safety. And if you look at the photo below, you can clearly see that the presence of a casing does not guarantee one hundred percent protection against sparks. That is why it is also necessary to wear safety glasses, or better yet, a mask.

2. Safety glasses.

Always wear glasses or a mask when working with a tool. If there is no mask, then the glasses should fit tightly to the face. Glasses - closed type.

3. Special cloth.

Clothing must protect from flying sparks. Even if it is very hot, it is worth throwing on overalls while working. Clothes should not be made of “plastic”, otherwise they may melt or even catch fire. All buttons are fastened, nothing hangs or dangles from the clothes. Because this is unsafe, especially when working with large angle grinders.

4. Gloves.

When working with an angle grinder, I recommend using exclusively thick gloves. Use gloves number 1 if you have nothing else. Still better than bare hands. Number 2 is actually welding gloves, but I use them because they cover my hands almost up to the elbows. These are not cheap, so I recommend using regular, but thick gloves:

5. Noise protection.

Many people don’t care, of course, but I always use headphones when working. All these Bulgarians are painfully noisy.

6. Dust protection

At long work with an angle grinder, be sure to use a respirator. Can be normal

Or use a half mask with a carbon filter

7. Fastening and retention.

Any element that you do not saw must be secured and immovable. This is either a vice or a second assistant who will hold the pipe being cut with an adjustable wrench. The ideal cutting, in my opinion, is cutting on the floor or on the ground. Hold the grinder firmly and confidently.

Before cutting, watch where the sparks will fly. You need to stand so that sparks do not fly onto your feet.

The grinder cannot be pressed too hard. Cut the material under the tool's own weight. If you apply too much force, you risk breaking the disc.

Do not cut at an angle - the blade may break. Never cut with an angle grinder in an awkward position with an unstable stance. When cutting standing pipes, such as risers, ask a partner to keep the pipe from falling.

Provide for disk clamping and timely shutdown if the machine is inexpensive.

The grinder must be held so that if the disk jams, it will not be torn out of your hands. Keep it strictly vertical to the pipe/fitting. Avoid distortions.

Remove anything flammable. Although the sparks are not as hot as when a large current is shorted, there are so many of them that even overalls can burn out. When cutting, be sure to protect wallpaper, tiles, toilets and sinks. Black spots remain on ceramic surfaces and may not be removed. The surface will be damaged. Ideally, cover with a large, thick, wet cloth. Can cardboard boxes, but this is a flammable option.

8. Disks.

Always make sure that the disc is installed correctly. The cutting discs are thin. Thick - for grinding. You should not tempt fate and try to carefully grind the surfaces with a cutting disc.

If these are not neglected simple rules safety and use high-quality discs, they will not break and fly apart in all directions. I did not insert photos from the Internet, which happens when safety precautions are not observed when working with an angle grinder. Look for yourself.

More

By the way, in addition to the usual grinders, there are battery-powered machines, which can sometimes be very useful.

Almost every brand that produces power tools has such machines. Happy and safe work!

p.s. And finally,

promised story from my practice

Once upon a time, when I just got a job as a plumber (i.e. I was a newbie), I always put on glasses and headphones before working with an angle grinder. All my experienced colleagues made fun of me and chuckled, saying that you can’t cut anything off, but you dress up like a tanker. But I didn't care. I just didn't pay attention. The jokes continued until Petrovich began to “quickly” cut off the pipe. Without glasses, of course. Instead, he narrowed his eyes “professionally.” But you can see metal shavings that have dug into the eyeball; they simply did not know that the squint was professional. As a result, a person stands, holding his eye with his hands so as not to blink, otherwise the shavings sticking out of the eyeball will cut the eyelid. What to do? Call an ambulance? It will take a long time, and it’s not a fact that he will go. climb with dirty hands in the person's eye too bad decision. And then I remember that a few days ago, I was sorting out HDD. And there was a very powerful magnet, which I threw into the pocket of the very pants that I was now wearing. I suggested trying it. The next second the shavings were removed from the eye. And, thank God, everything worked out.

And there were cases where discs fell off... Of course, glasses won’t help, but this is also the result of non-compliance with TB. I didn’t twist it enough, tilted it while cutting, etc. There was a case where two people were standing in the toilet, one was sawing. The disk fell off, ricocheted 3 times against the walls, sawed off a piece of the toilet bowl on the fly... but by some miracle it didn’t hit anyone. Lucky. So be careful and careful! Don't ignore the rules.

dretun.ru

How to saw correctly with a grinder

The grinder is a fairly popular tool, used both in everyday life and in industry. However, all activities associated with the use of this device involve a certain risk to life and require clear knowledge, skills and abilities from the working person.

Simplicity external structure and financial accessibility, made this device widespread, both among craftsmen and among the average person.

Types of grinders

It should be noted that the grinders do not, as such, have a gradation into species. They can simply be qualified by power characteristics and, accordingly, by the diameter used in the work cutting disc.

Conditional classification by power index:

Up to 900 W – household machines;

From 900 to 1500 W - semi-professional;

More than 1500 W - professional.

In accordance with the power characteristics of the angle grinder, certain diameters should be used cutting discs. It is logical that for the most powerful grinders, discs with a maximum radius are suitable. And, conversely, for low-power grinders you should select the smallest disc diameter.

How to make the right choice

If speak about home use grinders, it should be noted that in the process of performing a certain type of work, various tools may be required. As a rule, it comes down to dimensions. There are places where an industrial grinder simply cannot be reached, for example, under a bathtub, in corners, etc. In this case, a mini grinder is simply irreplaceable. And to perform grinding work, it is definitely more convenient and easier to use a lightweight, small-sized tool.

From this we can draw the following conclusion: if an angle grinder is purchased for medium-intensity work, and also taking into account a possible increase in the volume of work performed, it would be rational to purchase a high-quality semi-professional tool. But ideal option, will be the joint acquisition of a decent sample in the middle price category from 4,000 to 10,000 thousand rubles and the least expensive and powerful sample (mini grinders for work in hard to reach places).

Using a grinder

When using an angle grinder, especially powerful ones, you should remember that this equipment allows you to cut metal and all this happens at very high speeds of the cutting element. Therefore, all necessary protection during work (mainly for eyes and hands) must be worn and used. It is necessary to take into account the possibility of deformation and crumbling of the disk, as well as further flying of its parts into the worker.

Starting the cutting job of any metal product, be it fittings, angle, pipe or anything else, it should be remembered that the possibility of clamping the disk between the two sides of the material being cut is not excluded. This situation can threaten to instantly bounce the entire device towards the worker. In order to exclude traumatic effects, the material to be cut should be positioned in such a way that the possibility of jamming of the cutting element is excluded, and the body of the working person is located slightly away from the direction of the cut.

Also, you should not use those disk diameters that, according to technical data, cannot be used on this grinder. Working without a protective cover may result in additional injury.

The application of all these simple rules can actually save a person’s life and protect them from losing limbs.

kakpravilino.com

How to work with an angle grinder?

So, you bought a suitable "grinder" and disks for it. There is no work experience, the tool is dangerous and it is scary to approach it. But we need to work. What to do? First of all, you need to take care of the means of protection. At a minimum, protect your face and hands. The shield mask is convenient because it protects the lower part of the face, but it fogs up when you take a deep breath. Glasses do not have this drawback, but the nose and mouth remain open to sparks, so it is advisable to use a respirator along with glasses.

Means of protection

You should pay attention to the quality of fastening the mask to the straps - usually this fastening consists of screws with plastic wings, which must be tightened as tightly as possible. It is very inconvenient when the mask dangles and falls off when bending forward.

The mask-shield can be made of plexiglass or polycarbonate. The second option is preferable, because polycarbonate is much stronger than plexiglass. A fragment of a flying disk will immediately pierce the plexiglass, and the polycarbonate, although it will be pierced, will retain the fragment of the disk. It is difficult to say whether a damaged mask will withstand being hit by shrapnel again. It’s better not to tempt fate and purchase a new means of protection.

It should be borne in mind that complete protection cannot be achieved either from a face shield or from glasses. Sometimes sparks fly along a completely incomprehensible trajectory and fly under the mask, and sometimes, oddly enough, under the glasses (probably the sparks fall into the small gaps that form between the frame and the surface of the body when moving). Another feature of cheap plastic masks and glasses is their vulnerability to sparks: as soon as you catch a sheaf of sparks, the plastic becomes dull.

It makes sense to purchase a clear mask with head protection or even a welding helmet. There are closed masks with a breathing filter, which is a labyrinth of bulkheads (a fragment, having got there, spends all the inertia on ricochets between the walls).

A gas mask best protects your head. Old-style military gas masks protect the eyes with glass eyepieces that are not afraid of sparks, but the viewing angle is too small for comfortable work. Modern gas masks with a panoramic mask are much more convenient. Unfortunately, such protection is not cheap.

Gloves as a means of protection

Gloves should be selected in a suitable size so that there is no empty space at the fingertips. If the hand is close to the disk and the dangling tip catches on the rotating disk, you risk missing the moment when it is not too late to remove your hand, and the smaller the grinder, the more urgent this problem. If the glove fits perfectly on your hand, the maximum that threatens you is to cut yourself on the edge of a rotating disk.

A glove will not save you from a cut, but it will minimize the damage. Gloves are also useful because when working with sheet metal the edges of the cut are razor-sharp, and careless touching the cut without gloves threatens with a deep cut. The metal heats up from friction, and you can burn yourself on a freshly cut workpiece if you do not use gloves. Clothes should not restrict movement, but nothing should hang down. Laces, ties, waist ends or wide sleeves with angle grinders will tighten so quickly that you won’t have time to understand anything. The problem is that by tightening the clothes, the tool gets close to the body, and it’s not at all a fact that by this moment you will have time to turn off the motor.

Long hair must be collected in a bun or ponytail. Ordinary clothing can catch fire when sparks hit, so it is recommended to wear a tight apron for plumbing work or special overalls impregnated with a flame retardant over clothing.

In general, when working with a dangerous tool, protection is never enough. The above complex of protective equipment can be supplemented with shoes with a metal toe cap to protect the feet from the ingress of disc fragments. You can build a real iron chain mail, using the experience of reenactors of historical battles. Chain mail protects well from large fragments, but it will allow sparks to pass through. The same goes for metal mesh masks.

For those who spend a lot of time with a grinder in their hands every day, soundproofing headphones or earplugs will be useful. After many hours of work, ringing in the ears will persist for several days, and doing such work constantly, without resorting to ear protection, can easily damage your hearing.

Working with an angle grinder

The “grinder” itself is provided with minimal protection. Actually, it has only one means of protection: a casing installed on the gearbox and covering half of the disk. This casing must be rotated in such a way as to protect the technician from sparks and fragments of the disk when it ruptures. An additional handle is placed above this casing to prevent your hand from touching the cutting edge. It is technically possible to install the handle on the opposite side of the casing, but then the hand will be dangerously close to the working area, which is fraught with serious injuries.

Correct installation of the equipment is of great importance. Abrasive discs different masters They are placed in different ways: some - with the label facing the gearbox, others - with the label facing outwards. Beginners often have a question: which installation option is correct? Meanwhile, due to the absence of teeth, the direction of movement of the edge does not matter. There is, however, one caveat. The mounting hole of the abrasive discs is framed by a metal ring, which, according to the manufacturer’s plan, should take on part of the load when the flange self-clamps. Usually the disk is placed so that this ring is under the flange.

How to avoid self-tightening of the flange?

Self-tightening of the flange is possible when the disk jams, when the disk and the flange ground to it stop, and the spindle continues to rotate. Self-clamping also occurs during a sharp start, when the flange and disk remain in place by inertia, and the spindle makes a jerk. Sometimes the flange is tightened so that attempts to release the fastener lead to breakage of the open-end wrench, the locking button (it is plastic and therefore very fragile) and even the gearbox housing.

You can avoid self-clamping by placing a washer under the flange. You can find a metal washer of suitable size, or you can cut it out of plastic, cardboard or even paper. A rubber washer would be a very good solution: with a tightening tug, it stretches, and after the tension subsides, it returns to its previous position.

Naturally, when using branded mechanical superflanges (BOSH, Makita), the problem of self-clamping ceases to be relevant. True, new problems arise - for example, if you forget to press the folding bracket, you risk catching it on the workpiece or workbench, which will lead to irreparable damage to the quick-clamping mechanism.

It might make sense to buy a primitive nut with a movable washer that can be tightened using a regular wrench. Having a minimum of structural elements, such a nut is highly reliable and quite cheap, and most importantly, it solves the problem of self-clamping no worse than overseas miracle mechanisms.

When working with a small angle grinder that is not equipped with an automatic soft start, the flange can be tightened by hand rather than with a wrench, because during the starting jerk it will tighten itself quite well. When starting smoothly, it is necessary to screw the flange with a wrench. On large angle grinders, the nut should be tightened tightly with a wrench, even if the machine is not equipped soft start.

The choice of equipment deserves special attention. Cutting wheels, which are very popular today and used for cutting metal, consist of an abrasive reinforced with fiberglass mesh.

Cutting materials with a grinder

In principle, it is possible to sharpen the workpiece with the surface of the disk, but it is not worth it: the mesh is located too close to the surface, and if it is damaged, the disk will lose strength. You need to sharpen either with the edge of a cutting disc, or with special grinding discs, or with a sharpening stone on sharpening machine, putting the grinder aside (in general, think as often as possible whether the planned work should really be done with a grinder).

For cutting stone, brick, concrete and tiles, there are special diamond-coated cutting discs with cooling slots along the edge. It is recommended to cut these materials at low speeds.

What can you cut with a grinder?

Many people look with hope at the “grinder” when the need arises to cut wood, plywood, chipboard or plastic. An angle grinder is too fast to do this kind of work, so the cutting wheels melt and splatter plastic and burn plywood and wood. And here many craftsmen are tempted to install a circular saw blade... The devil is in the details. The dimensions of saw blades are slightly larger than those for angle grinders, but this “slightly” is quite enough to prevent the installation of a protective casing.

It would seem that this is the first sign that you need to abandon the idea, but the master who succumbed to temptation usually does not stop and removes the casing to put the saw blade. And it is much heavier than abrasive! With its weight, it is not designed for a speed of 11,000 (or even 7,000) rpm. The result of going beyond the documented capabilities is a vibration that is felt even on weak angle grinders. A strong machine (for a 230 mm blade) with a saw blade is almost impossible to hold in your hands due to the frantic vibration, and the gyroscopic effect does not allow you to change the position of the tool in space. The craftsmen, who once worked with large “grinders” with a saw blade, talk about thrills that cannot be forgotten.

When the saw blade is jammed

When a saw blade jams, the kickback will not only be strong, but also incredibly fast, and you may simply not have time to react. When using a lightweight and relatively weak abrasive disc, the force of the reverse thrust is limited by its strength. A car with a steel disk accelerated to the limit will be torn out of your hands by a quick and powerful blow, and the trajectory along which it will fly is difficult to predict. There are breaks and steel discs; As the masters gloomily joke, anyone who has seen such a disk rupture will never talk about it again.

IN Lately saw blades began to appear on the market with a bore hole diameter and outer diameter suitable for angle grinders. Imagine: you are holding in your hands a steel disk with pobedit tips (or with a chain on a chainsaw). It is heavy - probably steel; circular stripes on the surface - probably the disk is calibrated; Packed in a nice cardboard envelope, inside a plastic bag, even a soft plastic sponge is put on the teeth. On the packaging (and the disc itself), its parameters and purpose are described in the purest Russian language, the company logo and even the website address are printed... And when you go to the website, it turns out that the company does not produce anything, but only exports consumables from China.

In what basement, on what equipment and from what materials the disc was made, one can only guess. And the soldering tips seem to be similar to pobedit ones, and they seem to hold up perfectly, but no one guarantees the reliability of the welding, and it is unknown how quickly they will start to fly off.

Carefully! Do not put the saw blade in the grinder

You need to firmly remember: the “grinder” is not designed to use a toothed disk, even if it is suitable in diameter. The steel disc is too heavy for such speed, and the angle grinder is too sensitive to tilts and distortions. Yes, at first the nameless discs do not fly into pieces, they cut instantly and give a perfectly even cut, but if the solder suddenly falls off or the steel breaks, turning out to be only an alloy similar to steel, there will be no one to hold accountable: the manufacturer is unknown.

Manufacturers of saw blades for wood in Bulgaria

Not a single eminent brand produces saw blades for angle grinders. Unlike nameless Chinese cellars that only strive to cover demand and make money, well-known manufacturers value their reputation. Having shown such blatant incompetence, the company would have to pay not only with money, but also with the irrevocable loss of its name, which is why respectable gentlemen do not produce consumables that violate safety requirements. You cannot use saw blades on angle grinders - that's it.

However, well-known manufacturers are making legal attempts to make angle grinders more universal. For example, BOSH produces a universal cutting disc Multi Wheell 2 608 623 013. This is a carbide abrasive (not a saw, mind you) disc with cooling slots, which significantly reduces heating of the material. There are no protruding elements in the slots. Compared to the “toothy” nonames from China, such a disc produces a slightly shaggy cut, but is no more dangerous than a regular abrasive disc. It cuts metal, plastic, wood, plywood and chipboard perfectly. He doesn't even trip over nails - he grinds them together like a regular cutting wheel.

Grinding discs for grinders

Sanding cups usually extend beyond the casing, while others require its removal altogether. In this case decisive role wears body protection - mask, respirator, overalls and gloves. If the abrasive discs break into pieces, then the wire grinding cups throw thin wires in all directions that dig deep into the body (they are especially dangerous when they get into unprotected respiratory tracts, the oral cavity, the sclera and the cornea of ​​the eye).

Individually they are almost invisible, so they cannot always be removed at home. Meanwhile, the irritation they cause is serious enough to land the victim in a hospital bed. It follows that when using sanding cups, protecting the machine becomes meaningless, and body protection, which is necessary in any case, becomes critically important.

So, the safety rules have been followed, the grinder has been assembled, and the equipment has been installed. It's time to get ready for work. First of all, you should fix the workpiece well. When cutting pipes, some craftsmen simply press them with their feet, and when cutting brick they simply place it on a flat, stable surface. It is extremely undesirable to do this: it is much more convenient to process a well-fixed workpiece, because the hands are freed up for a more reliable grip of the tool, the legs are freed up for a more reliable stance, and the body gets more freedom, which makes the work more comfortable and safer. You should not place the workpiece on two supports and cut in the middle: as it goes deeper, the workpiece will begin to sag towards the cut and jam the disk. It is more correct to fix one side of the workpiece, leaving the other side hanging - in this case, the cut end falls off and the cut only expands, which not only helps to avoid getting stuck, but also makes the work easier.

What is the most comfortable way to hold the earpiece?

There is no consensus on how it is more convenient to hold an angle grinder. Despite the simplicity of the design, the angle grinder allows the most different variants grip, and each master chooses the appropriate grip himself. The main thing is to remember that the casing must be between the master and the disc, as well as between the disc and the additional handle. No parts of the body should be in the plane of rotation of the disk, more precisely, in the sector of scattering of sparks and fragments of the disk (it is easy to follow this rule if protective cover).

There are two types of angle grinder cases: one-handed (you can hold the case with one hand, the power button is located directly on the case) and two-handed (they have a “tail” with a button in the back; it is convenient to hold the “tail” with one hand, holding the other for an additional handle) . Usually small and weak "grinders" are made one-handed, while large and strong ones are made two-handed. With a two-handed grip, one hand acts as the primary, and the other as a secondary.

There is no consensus on which hand should play which role. Some masters believe that the main hand is the one that holds the body (for one-handed machines), and the secondary one is the one that holds the additional handle. Others see the main hand holding an additional handle (in their opinion, it guides the tool), while the other hand only supports the body (or “tail”, if the “grinder” is two-handed). To understand which position is more convenient, you need to try to work in different positions.

Three slots for an additional handle

Most modern angle grinders have three sockets for an additional handle: two on the sides (perpendicular to the spindle) and one on the back of the gearbox (parallel to the spindle). It was said above that you cannot place the handle near the open part of the disk. This leaves two seats: at the casing and on the “back of the head”. It should be remembered that the hand in a state of pronation (palm down) is very unstable, and the most stable position of the hand is half-pronation (palm sideways). When preparing the angle grinder for cutting, the handle must be set perpendicular to the spindle. With the vertical position of the disk, which is typical for cutting, the handle will stand vertically and the hand of the master will take the most stable position - half-pronation.

Everything that has been said is also true for grinding: when the disk is positioned horizontally, it is better to place the handle on the back side of the gearbox so that it stands vertically. Since grinding is carried out by the surface of the grinding wheel and the disc is not immersed in the material, this process is not as sensitive to tool misalignment as cutting. For this reason, the horizontal position of the handle is quite acceptable. Some cheap angle grinders don't even have a rear handle socket. If desired, a bracket can be designed for such a machine, screwed to the side holes and equipped with a handle mount. The bracket must be strong enough; for manufacturing it is advisable to use thick, durable metal. Such staples are produced industrially; They are much more convenient than homemade ones, although they are quite expensive.

Where should the sparks be directed?

Many copies have been broken in disputes about where the sparks should be directed: from oneself or towards oneself. It is considered the most correct position for the angle grinder when sparks fly towards the machine body. Considering the standard direction of rotation of the disk for all grinders, this direction of sparks assumes that the spindle is directed to the left if you hold the tool to the side, or forward if you hold the tool with the spindle away from you ( right hand for the additional handle, with the left one for the body). However, the gearbox has at least two sockets for the handle, and, as already mentioned, it cannot be placed at the open edge of the disk.

This means that tool manufacturers allow the installation of a handle and a casing for working with sparks from oneself (with the left hand for an additional handle, with the right hand for the body). In fact, there is nothing terrible in this direction of sparks, you just need to understand where the fragments of the disk and the machine itself will fly in the event of a reverse impact. This directly depends on the direction of the force vector, and this vector goes from the point of contact in the direction opposite to the direction of disk rotation.

You can touch the workpiece so that the reverse impact will throw the car right in the face of the master, or you can do it differently - so that the car will jump up or go sideways. It is not difficult to predict the direction of the reverse jerk if you imagine the disc as a wheel that can push off the material and drive. Regardless of the direction of the sparks, you need to hold the car so that when jammed and pulled out of your hands, it either leaves you or drives past you. A good choice of point of contact between the disk and the material will make it safe to work with sparks from yourself.

How not to overheat?

To avoid overheating of the disc, after 60 seconds of continuous operation, remove it from the cut for 30 seconds without turning off the machine. Overheating of the disc leads to a decrease in its strength and cauterization of the cut edges. Do not tilt the machine when the rotating disc is in the cut: this creates the danger of jamming, and the cut will turn out to be uneven. When cutting metal, look into work area from the spindle side (where the disk is not covered by a casing) is only possible with safety glasses.

Abrasive discs are ground not only in diameter, but also in thickness. When replacing a worn disc with the same new one, it must be borne in mind that its thickness is several microns larger. When entering an already started cut, the disk will most likely get stuck, therefore, after changing the equipment, you need to enter the started cut from the opposite side of the “fork”.

To prevent the discs from wearing out too quickly, when cutting metal, the machine should be driven with the gearbox forward so that the disc hits the material from top to bottom. When moving the gearbox backwards, the disk goes from bottom to top, and can noticeably grind off towards the end of the cut if the cut is long enough.

It should be remembered that during coasting (the so-called inertial rotation after turning off) the disk is no less dangerous than when the engine is turned on. Touching the body with a disc that has not yet stopped can cause serious injury. You cannot put down, and especially throw the angle grinder with the disc down during the run-out. After turning off the motor, you must wait until the spindle has completely stopped. You can slow down the disc on the material. In order not to spoil the workpiece, you can attach a small piece of material near the workplace specifically for this purpose.

Cutting with a grinder "Bulgarian"

Being a grinder, the grinder cuts by grinding at high speed. There is no need to press on the tool - cutting should occur without force; pressing will lead to jamming of the equipment. When the disk is immersed in the material, the friction area increases, so when the disk jams, the machine will jerk with its entire body, possibly flying somersaults; everything will happen very quickly. The disk should be immersed shallowly, only a couple of millimeters, which is not difficult when cutting thin-sheet material.

The friction area will be quite small, moreover, the point of contact will be at the edge of the disk, and if the equipment jams, the tool will simply drive away like a one-wheeled car. When cutting thick products, you do not need to immerse the blade deeper than required. In general, it is better not to cut thick workpieces with a grinder, but to take a more suitable tool for this.

It is impossible not to mention here that the widespread opinion about the universality of angle grinders arose due to the low cost of this tool. In fact, craftsmen who try to do most of the work with a grinder are wishful thinking in order to save money. An angle grinder is a grinding machine, and the ability to cut with it is secondary, if not incidental.

You should try to use the grinder for cutting as little as possible. Long thick boards are convenient and safe to unravel circular saw, cutting down trees is more convenient than gasoline chain saw, curved cuts of plywood and chipboard are convenient to make with a jigsaw, and for small cuts, recesses, cuts with sharp corners For light sanding, a multifunctional and safe oscillation cutter is suitable.

In conclusion, a few general comments

An angle grinder is a high-speed tool, and this is where its danger lies. Particularly dangerous is the jamming of the disc when cutting, which should be avoided by everyone. possible ways. Those who do a lot of cutting with grinding machines should remember the rule: angle grinders love precision! The reason for this capriciousness is that cutting is a side function of an angle grinder, and its main purpose is grinding, which does not involve immersing the disc in the material. There is one more important point. You need to place the disk on the workpiece not before turning on the engine, but after.

It is clear that all the intricacies of the matter cannot be told in one article. The more you learn additional material, all the better. Special attention You should pay attention to safety precautions, carefully study the types of injuries possible when working with an angle grinder, and how to avoid them. There are many videos on the Internet where experienced professionals and traumatologists talk about this; safety rules are widely discussed on thematic Internet forums. If you know any experienced locksmiths, it is better to talk to them personally and take a few lessons in the workshop.

The most important thing is to clearly imagine at every moment what will happen in a moment. The master must be one hundred percent in control of the situation, have a good understanding of how the tool works, what can and cannot happen, and always know exactly what he is doing and what it will lead to. Relaxed carelessness modern man, acceptable when working at a computer, can play a cruel joke when working with a dangerous tool. The master must think on the fly, naturally and quickly, like a soldier on the battlefield.

What can you make from a grinder with your hands?

The wizard will show the selection interesting ideas on using an angle grinder, which will help expand the functionality of the tool and make it more convenient. See a selection of 5 options and choose what you can do based on your experience. 1. The screen shows a saw blade. This is not a factory production. This homemade product has two clamps - horizontal and vertical. Thanks to the duo of clamps, not a single part will come out of place - be it a corner or a pipe. In addition, there is a movable stop for serial cutting of parts of a certain length. Great tool that is easy to assemble by hand.

2. The grinder may not be visually beautiful, but no one demanded that from him. The idea is reliability and practicality. The most interesting thing is that it was not used for making homemade products. welding machine. In other words, not a single part is welded. Everything is bolted together, which makes assembly easier.

3. From the old table you can make a home mini sawmill. Attention! A fragment of this video shows an unfinished machine or the protective casing removed from it. Questions, besides this and others, there are also gloves. Watch TV while working at the sawmill.

Using the power regulator you can change the speed of this homemade product. The grinder is attached under the table in three places. Thereby eliminating any vibration of the disk. But note, this is just an idea, not a finished unit. When making such a homemade product, take care first of all about safety. It is necessary to close the unused part of the disk. For convenience, expand the table and install guides.

3. A modest option for cutting molded products. This homemade product with guides can cut metal at 90 degrees, 45 degrees. The guides themselves are removable. This makes it easier to transport and store the saw. In this homemade product, two options for returning the cutting disk to its original position are used simultaneously. This is a counterweight in the form of a dumbbell and a spring. You can only use one of them to choose from.

4. There is another idea - to do milling machine from Bulgarian. You can not only cut on it, but also make selections. You will cut metal not with a milling cutter, but with a milling disc. The grinder is attached simply. She twists her pen through the corner that runs along the table. If the option seems simple, then you can develop the idea and come up with something of your own.

5. If you sawed pipes large diameter, then we were faced with the problem of sawing metal in one dive, since the angle grinder gearbox always prevents us from doing this. A homemade product will help solve the problem. In addition to the installation room or pendulum saw a frame with furniture rollers helps to rest and fix the pipe. At the same time, making a small cut thanks to the rollers, it is easy to twist and cut along the entire diameter.

izobreteniya.net

i2life.ru

Good day to all. Today I will show you some ideas of what you can do from an old grinder. Any master or simply someone who does men's household chores himself has encountered this - the grinder has broken down for some reason and cannot perform the functions of an angle grinder. In fact, either the gearbox or the electric motor can break. Consider the first case when the gearbox failed, but the motor is in good condition.

1- Let's make an engraver from a grinder with our own hands. All that is needed is to disassemble the gearbox and cut off everything that is no longer needed. In the end, it should turn out to be a thread like this one.
Next we buy collet ER11 and place it on the angle grinder shaft, having previously removed the gear that rotated the gearbox.

The design should look like this. The result is a fairly powerful engraving machine, considering that the power of an angle grinder is rarely below 500 watts, and the engravers sold in stores are usually from 130 to 200 watts.

2-now, let’s still consider the case that the angle grinder did not fail, but simply became unnecessary, or the gearbox developed a large backlash and it became impossible for it to saw. Let's make an engraver out of it first. This time you will need to purchase a flexible shaft from the nearest electrical equipment store. They are not expensive. This is what he looks like.

The next stage will be difficult to describe in a nutshell, so I’ll just say that you will need to combine it and the grinder with the help of small tricks, since the shape of the grinders is different - there is no specific method. You may need a welding machine. Perhaps you can do this using epoxy resin. Low tide necessary details to secure the flexible shaft.

3-What else can be made from an angle grinder - an electric trimmer! All we need is a wood disc, a hoe and some tape. We fix the disk in the angle grinder, then fasten it to a chopper so that it does not dangle with the help of adhesive tape. All!! Ready!! This is what it should look like.

4-The next idea, you can build lathe on wood. All we need to buy is a drill chuck; the rest of the parts are probably lying around in the garage or at home. In this photo, the structure is made of metal and it will take a lot of time to build. I advise you to do the same but from wood. It will be cheaper and easier.

5-Make a cutting machine out of a grinder. All you need is a couple of boards, a door hinge and screws. This is what should happen. You can see more about it in this article -

i2life.ru

Do-it-yourself circular grinder

The decision to make a circular from a small grinder - great option in terms of economy Money. To design a sufficiently effective tool, the skills of a professional mechanic are not required. If you take the matter seriously, you can cope with the task using available tools and materials. Let's find out how to make a circular grinder from a grinder?

Required materials and tools

How to make a circular grinder with your own hands? To do this you will need the following tools:

• actually the Bulgarian herself;
• circular circle;
• sheet metal (tin or galvanized);
• a set of fasteners (bolts, nuts, etc.);
• screwdrivers, pliers, wrenches;
• electric drill with drills for metal;
• metal corners.

Making a sliding stop

A manual circular grinder requires creation sliding stop. As the latter, it is most rational to use several metal corners that will be located on both sides of the saw blade. It is recommended that the lower edges of this structural element be rounded, which will not allow them to cling to surfaces that will be processed with a homemade circular saw.

The corners must be fastened with bolted connections at both ends. To achieve optimal clearance, washers can be placed under the heads of the fasteners.

Next, a metal clamp should be secured to the body of the angle grinder, the tie of which should be located at the bottom. A strip of metal made of tin folded several times or galvanized is threaded through here. The ends of the latter are connected to fasteners located at the ends of the previously assembled sliding stops.

Preparing the gearbox

A circular grinder requires a working gearbox. The specified mechanism is removed from the tool, after which the optimal locations for drilling holes in the metal are determined. Such openings will be required to install the axial handle of a homemade circular saw. Naturally, you can try to hold the tool using the standard side holder of an angle grinder. However, the creation of even cuts in this case will become extremely problematic. As practice shows, holding a homemade tool with a rotating circular disk is beyond the capabilities of even physically trained craftsmen.

Axial handle

To create an axial handle that will allow you to hold homemade instrument in a stable position, it is best to use a metal rod or tube. Holes are drilled at the ends of the workpiece, which will serve to attach the structural element to the grinder gearbox. The prepared axial handle is attached using fasteners to the mechanical part of the tool.

Adjustment rod

To homemade circular from a grinder made it possible to adjust the depth of the cut; a special rod must be provided in the design. A structural element is made from a steel rod with a diameter of about 4-6 mm. One end of the workpiece is bent in the shape of a loop, spilled out and fixed with the front bolts of the corner stop.

A thread is created on the tail of the bar, which will subsequently enter a special adjustment opening on the tool handle. Before installing the rod, one nut is placed on its thread. After the tail of the element is threaded into the hole on the handle, the second nut is screwed on. Due to the tightening and loosening of these fasteners on the thread, the depth of cut is actually adjusted during the operation of the self-made circular.

How to make a stationary circular saw from a grinder?

The main difference between the design of handheld and stationary tools is the presence of a bed. The work is performed in the following sequence:

1. A special table is being prepared, which is covered with a galvanized or tin sheet. To fix the selected material on the plane, it is enough to pull it along the edges of the table with metal corners. The base on which the mechanical part of the tool will be installed must be as stable as possible. Otherwise, rocking will lead to inaccurate cutting of materials. In addition, table vibrations can be traumatic.
2. According to safety requirements, circular disc should not protrude a third of its diameter above the table plane. Therefore, in order to cut wooden block about 10 cm thick, you will need a cutting wheel with a size of 35 cm.
3. A stationary circular grinder should be made on the basis of a sufficiently efficient engine. Here you need to use a grinder engine with a power of at least 1 kW.
4. The basis of the adjustable stop will be a metal corner 7-8 cm long. The specified element is superimposed on the table and fixed with bolted connections.
5. A stationary circular saw from a grinder involves creating a shaft. The latter is recommended to be purchased from finished form, since critical errors may occur during its self-turning. You should choose a shaft that contains fasteners to securely fix the circular disk.
6. The transmission will be a V-belt type pass.

If necessary, a do-it-yourself circular grinder can be made on the basis of more powerful engine extracted from the old washing machine. In general, the choice of the engine here is limited only by the estimated power of the future instrument, which must be obtained at the output.

Safety precautions when using a homemade circular saw

Before starting up a self-made circular saw, it is worth taking measures to avoid injury. If the tool is designed as a hand tool, the trigger button should be located away from the rotating cutting blade. In the case of stationary saw the table on which the mechanical part is located must first be screwed to the floor.

When operating such a potentially dangerous device as a homemade a circular saw, basic vigilance is necessary. First of all, you should never position yourself in line with the spinning disc. After all, the latter can jump off the shaft when reaching critical speed. Also, you should not bring your hands too close to it, which should be no closer than 20 cm from the cutting element.

Sometimes when performing repairs or construction work A situation arises when equipment breaks down, and it is not possible to buy new or repair it. In this case, the master needs to know how to make from existing tools at low cost necessary tool. In this article we will look at what you can use to make an angle grinder with your own hands.

If an angle grinder (angle grinder or angle grinder) fails, it can be made from a drill. Please note that there are several ways to convert one instrument to another. The least expensive and less labor-intensive would be to use a special device - an adapter.

The adapter is an adapter that is made in the form of a rod. On one side it can be clamped into the drill chuck, and on the other side a cutting disc is secured using washers.

If it is not possible to buy an adapter, you can disassemble the faulty angle grinder with your own hands and dismantle the spindle.

You can also buy it at a repair shop or turn an adapter on a machine from a familiar turner. By clamping the adapter in the drill chuck, we get a functional angle grinder.

TO design flaws It can be attributed to the fact that such a “grinder” can only be used with strict adherence to safety precautions. It can cut metal no thicker than 5 mm. In addition, since the drill’s shaft rotation speed is significantly lower than that of an angle grinder (3,000 versus 11,000 rpm), the efficiency of metal processing in this case is much lower.

TO merits Such modernization can include:

• quick conversion of one device to another;
• use of the tool in places inaccessible to factory-made angle grinders.

When using a drill as a cutting device, you must keep in mind that the drill shaft rotates in both directions. Therefore, when cutting metal or other work, it is necessary to monitor the direction of rotation. The cutting blade should only rotate clockwise.

There is another way to remake it. But it is more expensive; to implement it, they purchase a special nozzle, which has a gearbox. The original gearbox is removed from the drill, and an attachment is installed in its place. The result is a good grinder made from a drill - almost a complete analogue of a faulty tool.

However, the cost of such a nozzle is quite high, and modernization takes a lot of time. Therefore, it is better to immediately purchase an inexpensive angle grinder.

All options presented are intended only for emergency solution to the problem. If you need to use the drill for its intended purpose in the future, you will have to spend a lot of time restoring it.

Converting a chainsaw into an angle grinder

Sometimes it becomes necessary to cut off a pipe or corrugated sheet in a place where there is no electricity. For this, a chainsaw grinder is used, which can be easily converted using purchased accessory.

It consists of:

• drive pulley or drum;
• protective casing;
• belt drive and a set of keys and studs.

To install this device on a chainsaw you need:

• remove the bar and chain;
• empty the oil tank and remove the clutch drum;
• mount the device pulley on the drive shaft of the drive sprocket;
• secure protective device and install a belt drive;
• install the cutting disc - and the mechanism is ready to work.

The main advantage of the design is that it can be used in places where there is no electricity. When working with such a machine, extreme caution must be taken, since the chainsaw has a higher torque than a standard angle grinder. In this case, the risk of cutting blade destruction increases.

If you don’t have a drill or chainsaw at hand, but you need to cut materials, you can make an angle grinder from a screwdriver. The algorithm for its modernization is almost the same as for making an angle grinder from a drill. The main element of the design will be the acquired nozzle - adapter or the spindle of a faulty angle grinder.

TO merits such a power tool can be attributed to the rapid transformation of the mechanism and the possibility of use away from electrical network. The homemade product can be used in cramped conditions where a standard angle grinder is not suitable due to its large size.

Main shortcomings homemade device can be called:

• small resource battery(when using a cordless screwdriver);
• low rotation speed of the cutting disc - about 700 rpm;
• insufficient power of the electrical device.

Such a mechanism can only be used as a low-power angle grinder. With its help you can cut metal with a thickness of no more than 1.5 mm or a 20*20 corner. They can cut reinforcement with a diameter of less than 8 mm. Use a screwdriver as a full-fledged cutting tool will not work.

Mini grinder made from improvised means

This device is suitable for those who does modeling— they often have to cut parts from hard materials. It is impossible to use standard angle grinders in this case: it is necessary to cut very small elements. For this work you need to make a mini grinder. It is made from small electric motor. It could be from a faulty VCR, printer, or children's toy. This device is powered by a charging unit. cell phone, USB input, battery or several batteries.

The hardest part is making it yourself cutting element. The disc is made from the thinnest cutting wheel. The diameter is chosen independently, according to the conditions of use.

Sometimes the cutting wheel is made from an ordinary drink cork.

The manufacture of the device begins with processing the handle - attaching the motor to it. Mounted on the axle Collet clamp. Take the prepared circle and secure it with washers on the M6 ​​screw. It turns out to be a kind of nozzle, which is fastened with a collet clamp.

The tool is ready for use. The motorized mechanism can be used without a handle if you need to trim parts inside the model.

You can watch how to make the device in this video:

Anyone who wants to make a device should know that a homemade grinder does not answer safety requirements. If there is no urgent need, it is better not to risk your health, and sometimes even your life.