How much can you work with a corner grinder according to the Code. How to cut a corner grinding…

How much can you work with a corner grinder without a break power and type of power

This is mainly due to a large number of hot sparks that appear when cutting this material. Manipulations are carried out only in refractory protection. In addition, you should clean the site of work from objects that may light up when the spark enters. At first glance, everything is clear the permissible angular velocity of the disk by 1.9 times higher than the maximum angular velocity velocity of the angular grinder spindle means that it is possible to use this cutting disk for metal without fear. Successfully cut a corner grinding of solid materials.

Unauthorized improvement of a tool not adapted for these needs. For example, a artisanal supply of water, if the manufacturer indicates that the machine cannot be used with water, which is fraught with a shock. A useful option that significantly increases the working resource of the electric motor.

• frame. An electric motor is installed inside that rotates the shaft through the gear gear. In most models, the case performs the handle function, so the inclusion/disconnection key is located here, the spindle rotation speed regulator;
• gearbox. It is a transfer link for the working effort from the electric motor to the cutting disk, directly connected to the rotating shaft;
• spindle. This is a landing shaft for a grinding or cutting disk, usually complemented by a button-fixer, clamping nuts for installing an abrasive circle;
• Protective casing. A safety element that protects the masters from flying sharp particles and chips, invariably formed during the sawing process.

Modern units differ greatly from the first samples of the corner grinder, they have become more reliable, universal, durable and functional, with a large range of opportunities and elements that facilitate the work. Through the corner gearbox, the rotation is transmitted to the shaft, which is used to fix the nozzle.

Safety precautions when working with a corner grinder when replacing a worn disk with the same new one must keep in mind that its thickness is several microns more. Manufacturers of saw wooden disks for corner grinder. Glasses will protect from sparks, small crumbs or a sipped disk. To get a free consultation, feel free to contact me!

How to work properly a corner grinder: technology, techniques, safety

How to work properly with a corner grinder (angular grinder): an educational program from the Estimata amateur in it acts on the coupling connected to the led gear, and not on the gear itself. In this situation, it is recommended to stop and bring the cut to the end from the opposite side.

It is also forbidden to work with a “angular grinder” with not sufficient stability and equilibrium of the body. The question is how to properly hold a corner grinder is very important, it must be studied from all sides even before working with this power tool. It is not worth working with any power tool not only with corner grinding, being unhealthy, tired or intoxicated, the loss of clear control over the body leads to negligence in actions, the lack of the desired reaction rate and the displayation of movements. When making a cut or grinding, always hold a corner grinder tightly with two hands.

Corner grinder, or natural selection tool. (slightly about security) ⁠ ⁠

On the wake of posts about grinder and other angular grinds)) I observe a lot of stories as a man with a corner grinder cut off his hand / leg \ head, the disk was chopped into the thigh \ face \ cerebral cortex, which on the corner grinding can not work with saw (circular). Let’s go.

I have serious experience with power tools and corner grinding in particular since 16. 12 years, very significant. With circular disk 7. I had 1 accident-chuvak at my facilities roughly neglected safety precautions and greatly damaged the foot. So, what I see, just reading the posts: the absolute majority of gross violations of TB! (although the instrument and equipment, yeah, are almost always to blame) let’s go through the basic rules a little (all pictures from tyrnets)

The direction of the cut. The direction of the cut should always be sparks on itself. There are several reasons, and almost everything can be seen in this very successful picture.

1) the direction of movement of the tool after loss of control, uncontrolled exit from the cut. That is, when the disk spins “on itself”, if the corner grinder bites (metal corner, sharp change of material, knot, crushed and burst the disk)-this beauty will fly forward! Not an employee. Actually, this is how it was with us, with our emergency. It flew to this “fellow” in the leg, thanks to the independent transfer of the handle (cut in the other direction) and the workpiece was recorded for compression (more on that later). Personally, I had 7 times a bit of a disk so that I lost control of the machine. And at a height, also (when you cut the stroob in the LEF and reinforces reinforcement, for example). Two corner grinds in the end into the scrap, crashed, from my injuries, I broke my elbow, while flying from the platform. Sharped, damn) By the way, for jokes, so young corner grinders with a diameter of 230 mm with a vertical cut during a snack, torn from a place upward about 15-20 90 kg of a guy. So think if you can hold it if this fool flying in the leg. Sparks fly into the eyes? Well, what did you want. Glasses do not help? Yes, I know. For example, I work with metal in a welding mask with a folding light filter. Raised and ordinary transparent plexiglass. Cheap, angry, absolutely safe. Burning pants? Jeans live for a very long time, berets. And in general in slippers and shorts of such a tool, a little arrogant to be a mistake.

2) Well, the scatter of the disk is shown in the picture very high quality, there is nothing to talk about.

3) the correct location of the workpiece. Reliable fixation and t.D. And after cutting, part of the workpiece should fall under its weight / move away from the workpiece without pinching the disk.

4) incorrect disk position. Well, EPT, well, not funny. As soon as they do not cut. If you have little experience working with an angular grinder and it is not your constant tool, only at 90 degrees to the surface. If the disk is not even, but bend the ultimately necessary for its breakdown, siiylo decreases not in your favor.

5) This is more from the category of tips, or something, will help many professionals. Under a protracted nut, put a piece of paper folded several times and feel free to tighten. The disk does not pull, does not squeeze, easily removed without a key.

6) Circular disk) Well, it only looks scary, in fact. There are precisely special, with a diameter of landing and the estimated speed of rotation. Subject to safety precautions is not more dangerous than the same dry. Turn some kind of garbage from the sawmill and I would be worried. And also important, make the side of the disk installation.

7) power. Yes. Suddenly. Select the tool taking into account the tasks. Ideal for everyday life and many prof.works-180 mm, 1.8 kW. A very powerful thing, you can work quite confidently on top, you can hold and have time to react. With a trifle to work, we take a smaller animal. Well, 230 mm and 2.5 kW is already a highly specialized tool and you really need to be able to work with it. For example, I have 180 and 125 mm. Although I somehow bought a fool of 230 mm, after my partner threw it on a chair, they sailed. It was after that that they realized that it was better to pass twice less powerful. But, for example, tilers-trowel are needed precisely powerful corner grinders. IMHO, corner grinder more than 180 mm, for the work of purely “top-down” and errors in the technique of work do not forgive. But this is only my opinion, many gurus of welded business with her do this. But a beginner and a non.professional is better to stay away from such a thing.

8) wrong disk selection. Oh yes, this is a favorite. First we grind the profile of the disk to the cordial grill that it is a little thicker than the paper, and then we are surprised, the disc has burst. For each type of work, the equipment is equipped! There are sandpaper (sharpening), grinding (petal, felt, etc.D.), a variety of detachment. Well, you should not ignore them because of your own laziness.

9) Defense removal. Well, this is already natural selection, cheap. Darwin Prize.

10) serviceability of the electric wire. There was somehow a case, isolation was damaged. Pierced on the skin, lost control of the corner grinder, the corner grinder flew into the country of drilled things and crashed against the wall.

11) the correctness of the cut itself. Shown in the picture. Do not invent anything new, fraught with troubles.

In general, if you summarize all the TB with a corner grinder boils down to: a) the correct selection of tools and equipment, compliance with the cutting technique.B) PPE. Glasses are not so 100 % saving their eyes, a mask with a folding light filter or a plexiglass shot, more reliable. Clothing-tight (jeans at least), durable shoes, non-combustible. The perfectly-coopeum of a tarpaulin made of tarpaulin and berets made of whole leather or even a Kiraza, without fabric inserts (burn out, verified). Gloves-earnest loud. Also for a very short time, but at a price of 25 p, two or three pairs per day, no special consumption. I would not advise kraga, you don’t feel a button, with a very bare hands, the skin is leather and there is a great risk of getting burned on the workpiece.C) air circulation. Provide good ventilation, gases formed during the cut process are able to spoil health.

Preparation for work with corner grinding

The rules for working with power tools and their devices always provide for preparatory work. Corner grinder is no exception. First of all, the required protective equipment should be prepared.

Safety precautions when working with a power tool

note! Minimum program. glasses and casing. Violation of these requirements may result in sparks and injuries.

Protective gloves should be. In the labor process, the hands are located close to the disk. Because of this, particles, scale and sparks fall on the fingers and palms. Dense gloves are used to protect the hands and safety of their skin. This is a minimum set for home use. If we are talking about production, then the working room needs full.fledged protective clothing that covers all parts of the body.

Features of work with corner grinding

Safety precautions when working with an iron

Modern corner grinder allows you to replace the emery when work on metal is carried out. To avoid problems, when using the tool, it is useful to remember a few recommendations:

• Corner grinder should be kept in two hands in the process. In the case of a reverse impact, strong fixation will minimize the displacement. Otherwise, the risk of injury increases.
• Work should be carried out on a flat surface, confidently maintaining balance.
• Make a cord on the opposite side of the disk. The instructions for the operation of the corner grinder puts forward this requirements to avoid a short circuit and the attack wave of the unit.
• At the end of the work, the tool should be held tightly in your hands until the disk is completely stopped.
• If the supply of electricity is disconnected, it is necessary to remove the cord of the instrument from the outlet. Otherwise, the corner grinder may start working without the availability of control by the operator.
• The process of work is accompanied by heating of the disks. After turning off the tool, they cannot be touched until the moment of cooling.

Fixation of the material

Why millions of people cut spars from themselves and how they threaten it? ⁠ ⁠

Corner grinder is the most popular traumatic instrument. If someday, someone will compose a rating of tools of crippled people, then the angular grinder will definitely take the first place, leaving far from a separation from any other machine or tool. And in most cases this is due to improper operation.

By the way, at the end of the publication there will be a video with very simple, but at the same time with a very effective way to protect against sparks.And so, if we polish wood or metal, then there are no questions, it is definitely necessary to polish so that the chips and dust from grinding fly away from us. Even if the disk is scattered when cleaning the metal, the fragments will fly away from you, and if some part will fly to you, then they will simply take on a protective casing.The main question is in which direction the sparks from the corner grinder should fly if we cut the metal? On yourself or from yourself?When we begin to cut metal, along with sparks, the theoretical possibility of return appears. For those who are not aware of what I mean, then the return. This is an instant reaction to a clamped disk. Squeezing leads to the instant stop of the rotating mechanism of the corner grinding, which leads to the fact that the uncontrolled corner grinder (which stupidly pulls out of the hands when the disk is jammed) begins its movement in the parting of the disk rotation. And in this case, the corner grinder either moves on you or from you.Let’s schematically draw both options to understand how sparks, fragments and tools will behave themselves.

According to this scheme, it turns out that if you cut with sparks on yourself, there is a risk that in the case of the discharge of the disk, the fragments will fly in your direction, and if you cut with sparks from you, then from you. But, even if the disk is scattered, with a “spark” position, the protective casing takes all the fragments. I say this their personal experience, in my memory I had a “sparks on myself” 4 times, and I have never even a hint of a fragment flight in my direction (each time there was a protective casing on a corner grinder).And most importantly, when we cut the sparks on ourselves, we need not to stand outside the corner grinder, but a little side of it, away from the predicted flight of fragments.And now the most important danger that is fraught with a corner grinder. Sparks and fragments are baby babble. Background. This is the most important test that the angular grinding. When cutting metal, for various reasons, a cutting disk may clamp. And then we have a return. Even 115, the smallest, corner grinder in this case is almost impossible to hold in your hands, which is already talking about the models of more.So, if we cut the sparks on ourselves, then the tool will simply tear out of the hands, and it will fly in the direction opposite to the operator. But if you cut spars from yourself, then when you give out, a tool that, even with a released start button, continues to rotate at speed 10 by inertia.000 revolutions per minute, will fly to the operator. If you have a little imagination, then you yourself can imagine both cut offs and legs and interrupted arteries and a lot of things that are still quite suitable for the plot of Hitchcock films.So why do people continue to cut spars from themselves? Everything is simple, who saw the thread of the explosion of a light.school grenade? A lot of sound, light, smoke, but it does not cause any damage. The same thing with corner grinding, people are afraid of sparks, because until the corner grinding is jammed, in their opinion, this should be afraid most of all.Waiting for your opinion in the Комментарии и мнения владельцев. Well, the video that promised at the beginning of the publication:

Electrotechnical portal.

This Instruction was developed taking into account the requirements of legislative acts on labor protection, SNiP 12-03-2001 “Labor safety in construction. General requirements ”, sweat RM-016-2001“ Intersectoral rules for labor protection during the operation of electrical installations ”and other regulatory legal acts containing state regulatory requirements of labor protection. Designed for employees allowed for the work of work with portable power tools. Personnel with a group of p are allowed to work with portable power tools and manual electric machines.

An angle grinding machine is a manual power tool with an operating voltage of 220 V from a single.phase power supply source of alternating current. In accordance with the European standard, there is double isolation, it is possible to use with sockets without grounding wires. The tool is designed for grinding, cleaning and cutting materials made of metal and stone without the use of water.

Persons who have trained by car and received safety precautions are allowed to work with an angle grinding machine.

Forbidden:

a) work with an angle.grinding machine without a disk device of a disk;

b) starting an angle grinding machine under load;

c) change the grinding circle when it still rotates;

d) the contact of the cord with hot, wet or oil objects, sharp edges.

When working with an angle grinding machine, it is necessary to use the means of protecting vision and hearing organs.

Before carrying out any work with the tool, make sure that the tool is turned off and disconnected from the power outlet.

Use only proper disks and discs with maximum operating speed, at least equal to the highest speed without the load indicated on the tool nameplate. When using discs with a concave center, be sure to use only discs reinforced with fiberglass.

Before using the disk, carefully check it for the absence of cracks or damage. Replace a cracked or damaged disk immediately.

Do not use individual transitional bushings to attach abrasive disks with large holes. Use only flanges designed for this tool.

Make sure not to damage the spindle, flange (especially the mounting surface) or the stopping nut. Damage to these parts can lead to disk breakdown.

Before using the tool on the actual processed part, check the tool at the highest speed without load, within 30 seconds in a safe position. Immediately turn off the tool in the presence of any vibration or swing, which may indicate a poor installation or disk with poor balancing. Check the tool to determine the cause.

Make sure the processed part is securely fixed.

Hold your hands away from rotating parts.

Before turning on the switch, make sure that the disk does not apply to the processed part.

Do not use a cutting disk for side grinding.

Beware of flying sparks. Keep the tool so that the sparks fly the other way from you and other people or flammable materials.

Do not touch the processed part immediately after work; it can be very hot and lead to skin burns.

Pass the tool like this, the pile of power cord during work has always been behind the tool. Use ultrailinum cords designed to work on the street.

When working in dusty conditions, make sure that the ventilation holes are open. If necessary, clean the dust, at first turn off the tool from the power supply (use non.metallic objects when cleaning) make sure not to damage the internal details.

Cutting discs cannot be subjected to any side pressure.

Repair of an electric tool should only be performed by qualified specialists using original spare parts.

Work with an angle grinding machine should be stopped when one of the following faults occur:

• damage to the plug, cord, or cord fuse;
• breakdown of the lid of the brush holder;
• switch damage;
• sprinkling brushes;
• the flow of lubrication through ventilation holes;
• the appearance of the smell of burning insulation.

Work work principle

The corner grinding machine was originally designed for polishing and grinding surfaces, and therefore it easily copes with operations on wooden blanks. At the same time, there are their nuances and rules of work, which not only protect the masters, but also help to better cope with the processing of a tree.

At first, you should dwell on varieties of nozzles, among which they highlight:

• Grinding plates are a multi.layer composite disc where rubber and plastic alternate with foam rubber, sandpaper or wool flannel. Sortur helps extend the life of the circle and polish the surface.
• Petal disks are designed for rough processing of wood at the initial stage. The petals of sandpaper of different grainness are attached to the surface of the circle, which polish the surface, removing all the shortcomings.
• The wire brush is used to remove the old paint from the wooden surface.

Operations related to polishing or grinding wood are considered relatively safe. When working, the disk does not get stuck in the cut, there are no jerks, closures and deformations of the circle.

Cutting wood

Only one type of cutting circle is used for cutting wooden material. With lateral teeth it resembles a disc for a circular saw, but they are not so long. The teeth help to crash into the material more, but the boards need to be cut carefully, since the jerks of the corner grinder are not excluded. Boards are drained with a thickness of about 40 mm.

Apply circular discs instead of cutting circles is strictly prohibited, because they are designed to work for 3 thousand. rpm. The corner grinder does not give out and half of this speed. Accordingly, circular circles are deformed at best. The use of circular circles can lead to severe injuries.

Before work

Before moving on to direct work with the tool, some preliminary preparations should be performed:

• You should not work with any power tool (not only with a corner grinding) being unhealthy, tired or intoxicated. the loss of clear control over the body leads to negligence in actions, the lack of the desired reaction rate and the disposable of movements.
• Mandatory components of safe work with a corner grinding are closed protective glasses (preferably reinforced) for reliable protection of the organs of vision from entering the unpredictable trajectory of sparks or scale, as well as a protective casing that guarantees non.confusion in the working fragments of the processed material and sparks.
• You should definitely put on gloves or working mittens made of dense leather on your hands.
• Workwear should not be wide and at the same time should not constrain movements. Its parts should be neatly refueled and excluded hanging or dangling elements: ties, fringe, etc.D., which could drag out to a moving tool disk. When working with rocky materials without organized suction of stone dust, you should use an anti.fry respirator to avoid problems with the respiratory system.
• The tool should be completely efficient, it is forbidden to use a deformed or damaged working disk, the use of which could cause a reverse blow.

How to keep a corner grinder while working

The correct grip of corner grinder will largely provide competent and safe work with the tool:

• The handles of the grinding machine must be held tight with both hands, without tolerating its center of gravity to any one. With reliable capture, even in the case of a reverse blow, there will not be a serious shift in the tool, and even more so it is torn out of the hands.
• The power cord should be located away from the rotating disk: its capture will create a risk of short circuit and a sharp stopping of the tool with the possible occurrence of a reverse impact.
• A cutting line for a cutting cut should be placed in such a way that the corner grinder goes to the master, in addition, a person should not be in the plane of the likely dispute of the disk. The direction of sparks at the same time is possible both aside from the master, and for it. this everyone decides for himself. There are no options for left.handed options. when grabbing a corner grinder, the only convenient sparks for left.handed will go “for themselves”. And a mandatory rule. there should always be a bucket of water for extinguishing possible from the sparks of the fire.
• It is forbidden to postpone somewhere a tool until the rotation of the working disc is completely stopped, otherwise objects that are not intended for processing may be hooked for processing.
• If it is necessary to move the corner grinder from one place of work to another, it should be turned off, since any careless movement of the master (stumbled, swayed, fell) can lead to unpleasant consequences: injuries, seize foreign objects, clothes, etc.D.
• The working disk is significantly warmed up during work, and, of course, you should not touch it until it cools completely.

Safety precautions when working with a corner grinder: the secrets of the master

This article shows the main errors when working with corner grinding (corner grinding), as well as measures to eliminate them. We will talk about the causes of dangerous situations associated with the use of this tool, as well as how to avoid them. The article shows cases not described in the instructions.

Even the most harmless tool in appearance under certain circumstances becomes dangerous not only for health, but also for life. In this regard, we will talk about the most common cases of incorrect operation of the corner grinding, which may entail injuries. precisely, we will pay attention to what needs to be done to avoid them.

Corner grinder, regardless of size, is considered the most dangerous tool for several reasons:

• A relatively large open area of ​​the rotating element (disk).
• Lack of a reliable reference point.
• Killed discs (abrasive).
• High rotation speed in small models and high power in large.

The number of injuries from it exceeds the rest of the factors by several times (the nearest “competitor” is winter ice). For full and safe work with it, a certain skill is required, which is purchased during operation.

Note. These recommendations relate to the right tool and work in normal conditions.

The danger of this tool is primarily determined by the principle of operation. cutting occurs during the contact of the rotating disk with the workpiece. In this case, the contact point is the only stationary support, since the tool itself is held by the operator by weight. Under such conditions, even a slight skew can cause a sharp uncontrolled jerk.

How to be safe. If you have to work for the first time with a corner grinder, start with low.power models (disk diameter 115–125 mm). This will help to master the principle of distribution of loads on the tool on. Give up work that seems dangerous to you.

About 90% of “emergency” cases falls on problems with an abrasive disk (or a detachment), which serves as an activator and a cutter at the same time. Working with a defective abrasive disk. a common case.

Chip. This visible defect forms Zazubin, which, when contacting metal at speed, will cause a sharp jerk. At the same time, the operator will not have time to extinguish it due to a high speed of rotation. At best, after a jerk, the disk will fail. In the worst disc, it will either fly to pieces at a speed of up to 300 km/h (bullet speed), or the tool will simply tear out of the hands with minimal consequences.

Breakdown. This defect can be invisible at first glance, but immediately felt when turning on. it begins to “chat”. A broken disk can collapse even before contact with the workpiece. Often a breakdown (thin disc 1.5–1.8 mm) occurs in the process of operation, when an angular grinder with a disk lies on the ground and accidentally advance. If this happened to you or before your eyes, inform the operator (t. to. He may be sure that everything is in order with the disk).

How to be safe. Only verification before installation and control literally before each launch will give a guarantee of reliability (factory defects are rare). If the brigade works, the operator of the corner grinder works only with her and monitors his tool. The disks of a reliable manufacturer (Lugaabrasiv, Bosh, Kronomax) have greater stability of the gap than cheap analogues.

The rule for each operation has its own disk

A huge number of cutting and grinding circles are produced in dozens of large and small factories literally for every task. The usual desire to save money and the desire to make everything with one disk can lead to a hospital bed.

• To save time, the plywood or wood is often a abrasive, which is softer than metal. The disk almost does not wear out, and there is no risk of its split due to the viscosity of the material. However, the high temperature from friction warms up glue and resin and caustic smoke goes, which, falling into the eyes and respiratory organs, can cause the operator disorientation or distract it.
• Installation on the corner grinding of a wood disk is prohibited by all manufacturers of this tool. The toothed disk clings better to the material than an abrasive, so the resistance force is several times higher. In such conditions, only a very experienced operator will be able to keep the corner grinder in such conditions. The identity of the seats of the disks of the corner grinder and the circular saw, as well as the desire for unhealthy economy, pushes people to this step.
• Sharpening of metal on the lateral plane of the circle leads to a decrease in the thickness and unbalancing of the disk. The top layer of abrasive is erased and fiberglass is exposed. This is very bad. There are appropriate discs for sharpening and processing metal. It also applies to grinding with an edge.

How to be safe. Each disk must indicate the scope of its application. If all the inscriptions in a foreign language, choose another company. in each section of the store or on the market there are more than enough. Any forms of use of cutting and grinding circles for other purposes (except for the stand for hot). for the responsibility of the operator.

STIHL rule, attentiveness, caution

In the absence of these factors, the operator can become dangerous not only for him, but also for others. There are a number of typical situations when an injury can be obtained by carelessness.

Hidden obstacle. On the path of cutting a sheet of metal or a number of reinforcement, there can be something firm (for example, stone) located under the sheet, t. e. Invisible to the operator. The disk stumbles upon it and there is a gap.

The clamp between the supports. “Favorite” mistake of newcomers. When installing the workpiece, pay attention to how the efforts are distributed regarding support. If you cut between the two supports, the edges of the groove will converge and the disk will clamp (the tool will tear out of the hands). The same happens if you cut on a flat plane.

Angle grinders, what should you pay attention to?

For what purposes can “corner grinding” can come in handy? Yes, for any if you are engaged in repair or construction. With its help, you can cut concrete, granite, steastrubes, brick and other solid materials, grind any surfaces from preliminary “rough” cleaning to final polishing. In the device, the corner grinder in the rotation of the rotation of the working surface of the disk is perpendicular to the axis of the engine rotation (it is at an angle), this is why the machine is called the angle grinding. Corner grinder is currently one of the most common power tools and sometimes capable of replacing a hacksaw, gas cutter and much more.

Professional and domestic angular grinder The main difference between professional angular grinding grinds and domestic operations. continuous operation time. If the household tool is designed an average of 30-40 minutes of work per day, and some less, then professional models are on labor shift up to 8 hours, respectively, the approach to development and manufacture of various classes in the corner grinder differs significantly, which affects the price and at the time of the life of the instrument. Professional equipment is more adapted for daily work, many models provide for such technical capabilities as patented fasteners of the disk, allowing to change consumption without any tools. The insides of professional models are more protected from dust, which protects their mechanical and electronic parts. Many of them are equipped with an electronic system for maintaining a constant rotation frequency under load, engine temperature control systems or its protection against overload. Supporting the constant speed of rotation, it is possible with an increase in the pressure on the corner grinder and the resistance of the material, without reducing the engine speed, protect it from overload. The market for angular grinders today is quite wide. Many manufacturers annually put dozens of new models into production and modernize old. In order to navigate the variety of the tool and learn about its functionality, with a description of the technical characteristics and features inherent in the modern angular grinder, knowledge of the subject will help make the right choice and eliminate the likelihood of buying an inconsistent class tool.

The Disha diameter reference bureau. from it, like from a stove, “dancing” everything else: power, speed, weight, size and even the number of handles. The standard diameter of grinding circles is 115, 125, 150, 180 and 230 mm, but the most popular dimensions are 125 and 230 mm (we collected them in the summary table). If we consider typical cases, then an ordinary manufacturer has three starting points in his program: “Basic machine 125 mm”, “Basic machine 150 mm” and “Basic machine 230 mm”. This is what the entire lineup develops from them: a small change in the size of the casing, the gear ratio of the gearbox and the power of the motor gives rise to all the endless variety of tools.

The speed of rotation actually should be attached only to the size of the disk, but in fact, the unification requirements have to be taken into account, so that only the upper boundary of the “binding” is strictly observed, that is, the linear speed of the cutting edge should not exceed 80 m/s. It is in the calculation of such conditions that the trials are undergoing a durability common in everyday life. If you want to promote them faster, you will receive a win in the “consumption” resource and, possibly, in performance performance, but no one guarantees you security: the circle can fly to fragments at any time. Recall that their initial speed, taking into account modernization, will exceed 280 km/h. By the way, you ever had to change the windshield of a car, broken by a small pebble that flew over the road, which you met only 80-100 km/h? If you count the inconvenient 80 m/s in the rotation frequency, you will get the following row: 6600 rpm (230 mm), 8400 rpm (180 mm), 10100 rpm (150 mm), 12100 rpm (125 mm (125 mm. ) and 13200 rpm (115 mm). The closer the spindle speed of a particular model is selected to the corresponding mark, the better. The equipment will work in the most optimal mode. Exceptions are machines for cutting stone. They overcome an increased load, and for them the supply of torque is more important, albeit to the detriment of the turning of the angular grinder, usually ranges from 600 to 2600 watts. Without exaggeration, we can say that after the diameter of the disc is the second most important characteristic. The larger it is, the more manufacturing the tool, the longer the abrasive discs serve on it, the more confident the work is and the less the motor heats up. An increase in energy supply inevitably entails a mass increase, but the car always has to be held in his hands (the corner grinder did not drink or the rubies that rest on the workpiece). Therefore, not only the strongest cars are popular, but also medium and lightest. Many manufacturers have a filled row in power with sampling almost at 50-100 watts. Practice shows that in fact, the difference between such “grinders” is almost indistinguishable.

Functionality “Bulgarians”.

The vibration main handle. The vibration main handle is convenient with prolonged work with the tool, reduces the harmful effects of vibration on the human body. There are two types of attachment of the handle to the case: the connection through the “silent blocks” and the rubber insert between the housing and the handle. Due to the fact that the connection is elastic and has nothing to do with free play, the “separation” of the tool and the arm does not occur and the machine control is not complicated. But shaking is significantly reduced.

Electronic protection against overload. Electronic overload protection system. Actually this name is too general. It is always necessary to specify what exactly is meant. There are two fundamental types of protection: disconnecting when overheating of windings and disconnecting during a jump in power consumption (it coincides with a peak of load on the motor). The third case. when both systems are present. combined. Most often (although the word “often” is applicable here with a big stretch) such options are equipped with low-power, but expensive tools for a 125-mm round. Among the suppliers are eminent companies. How necessary the “corner grinding” are necessary for such improvements? The answer is ambiguous. They, of course, extend the life of the motor and cutting discs (they do not like the work of the “innature”, which is suppressed by electronics), but sometimes very noticeably reduce the performance. In other words, if you fully support the most common statement “you’ll go quieter. you will continue”, then the presence of protection will only delight you, but if you are overwhelmed by a thirst for speed, then working with such a tool can spoil the nervous system. To the calls “Faster, even faster!»He will respond with a strike.

What your corner grinding? ⁠ ⁠

Today it will be short, but I hope a useful post about corner grinding (corner grinding) and its use based on my personal experience. Those who have come here by chance. for the past three years I have been engaged in housing construction, including by technical supervision and the correction of problems arising from customers as a result of violation of the construction technology for their contractors. In this connection, I have experience of both the house.builder and Handyman. I must be able to quickly navigate in the situation and be able to carry out repairs that fits into the trunk of my car.

And although there is a lot of fits there, I try to maximize the use of the capabilities of each available tool, and not buy a separate special device for the procedure that may have to be performed one.only time.

So, first you need to understand that in addition to the corner grinder (angular.grinding machine) there is a device that looks like it, but is completely not suitable for our purposes. This is the UPM. a polishing machine that looks like a corner grinder. They differ in the speed of spindle rotation, that is, the number of revolutions per minute. In a standard corner grinder without a revolution regulator, it is approximately 10,000 revolutions per minute. UPM is spinning at a speed of 2,000. 3,000 rpm.

Corner grinder with a revolution regulator combines the functions of the angular grind. And although I have one, today I will tell you about the most simple corner grinder, with fixed turns, which is in the arsenal of almost every master.

So, despite the word “grinding” in the name of the device, more often the angular grinding of metals is used for cutting metals, which it perfectly copes with the help of a standard abrasive disk. You can’t tell you anything much, most have experience with cutting discs. I can add about myself that according to my experience, when sawing thick metal elements from continuous metal, you should not use excessively thin wheels (0.7-1.2 mm), t.to. They quickly abuse and do not forgive mistakes with the slightest deviations from the cut axis. Well, it is clear that a small corner grinder should not cut the rails. it will work at the limit of power and will soon fail.

Also, the corner grinder can be used directly for grinding. For example, using a petal disk (right in the last row from above in the photo), or using a rubber circle with Velcro and sandpaper circles on Velcro (installed on a corner grinder). The petal disk is bad in that first, it is quickly clogged, replacing it requires time and money. it is not very good. The advantages are that it grinds aggressively, it is convenient for them to clean the metal of rust. Velcro circles change very quickly, they are inexpensive, while you can use the different granularity of the abrasive to obtain the desired result. When working with a rubber grinding circle, it is important not to put pressure on the tool, while learning how to hold it horizontally the surface of the workpiece. Then the process of processing will be no worse than after a flight or an electric rhubank. In this case, the surface is pleasant to the touch and very smooth. The downside is that it is still necessary to master the technical techniques of work with such a disk. taking the wrong corner easily to blame the part by choosing a recess in it with the edge of the disk.

Using grinding or abrasive wheels with corner grinders, you can sharpen tools and knives, but here you need to have a good experience, because at high speed any wrong movement can lead to the fact that the cutting edge will be constrained, even with due diligence.

Is it possible to cut a tree with a corner grinder? Despite the terrifying stories about opened breast cells and sawn turtles, I say responsibly. you can. At the same time, I do not deny the veracity of these stories. All of them happened with non.compliance with safety precautions and installing the saw discs of the circular on the corner grinder. Therefore, if you do not want to become a designer for a surgeon, use only specialized disks for angular grind. On the KDPV they are located in the second row and are represented by three.toothed and multi.tooth disks. The multi.toothed has wiring incisors on teeth to prevent jamming. These discs are suitable for rough cutting of sheet materials and boards, for cutting and sampling wood in uncomfortable places. In most cases, an angular grinder with such a disk replaces me a renovator. Also, with the help of such discs, you can choose semicircular grooves in the tree. For even cut, of course, you need a firm hand, and even better. the support sole like a circular.

Some manufacturers have universal discs for wood and plastic work. In the photo below the disc from Bosch. over, they have wheels for wood work with nails.

Well, with a tree is clear. What do you think about concrete? And then everything is fine with the corner grinder. Even with a disk size of 125 mm, it can easily cope with the cutting of paving stones or paving slabs, will help to last a wall under an electric cable or cut unnecessary angles on concrete products. To do this, it is best to use steel disks with diamond spraying that cut concrete as a sausage. The only negative is that dust flies just a cloud. In the photo, the discs are located in the first upper row. And the first in the lower is a diamond cup that copes equally well with concrete and wood. For example, if you need to remove a large amount of wood, it is better to use it first, and after a rubber circle for final grinding.

If necessary, you can put a diamond crown on the corner grinder for drilling holes in concrete. For example, in the photo below. 83 mm crown, which is installed directly on the shaft angular grinder.

In addition to the components presented in the photo on the corner grinder, you can put steel brushes for grinding, an adapter for milling or core, the nozzle turns the angular grinder into a chain saw, an adapter for installing a grinding tape and other exotic. Do you need it. I decide, I still prefer a drill, saw and milling milling plants in the form of separate devices.

As you can see, in experienced hands, an angular grinder is a universal tool that is applicable both in locksmith and carpentry and carpentry. It significantly facilitates life and accelerating the cutting and processing of various materials. from wood to metal and concrete. Treat the corner grinder seriously and work with it will bring you only positive emotions