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How to work properly with an angle grinder (angle grinder)
The work of the angle grinder (angle grinder, in prostranorodiya angle grinder), requires certain knowledge, skills and compliance with safety rules.
Angle grinder to clean surfaces, cut, grind and polish materials of different origin, as well as sharpen the edges of the working tool. To use the device should take into account the class, type of material to be processed and type of work. Properly cut metal and perform specific types of operations will help to know the purpose of nozzles. They are selected and installed according to the task at hand. Information about the works that can be performed with an angle grinder, provides the manufacturer, and it is specified along with the technical specifications on the discs (circles). In most cases, it may also be indicated on the packaging of the product.
We worked at the site, doing metal heating, I went to cut a piece of pipe. Usually angular grinder cut to himself (sparks under himself), this man worked at the same site, paving the roof, came up to me and almost an orderly tone advised to change the direction of rotation of the circle from himself. I asked why I had to do it, but other than “that’s the right thing to do,” he didn’t give me much of an argument. We naturally began to argue with him, but to a consensus still did not come.
In this regard, I have not found any specific rules, and so everyone must choose for himself in what direction should the sparks fly, because it is no wonder the manufacturer makes the design of the angle grinder so that the direction can be changed independently. But from experience, I will express my thoughts, tell what I have come to in terms of safety and convenience of using this tool for 15 years.
Let’s consider the variant when the direction of sparks is from itself:
Personally for me in this position it is hard enough to work with a tool. it is necessary to hold the angle grinder maximally perpendicular to the surface, if the disk is shifted back a bit, the tool can easily get out of hand. Sparks, under certain conditions, fly straight in the face, and if the disk flies away, and you can be without eyeballs.
In this position the disk more often bites, the tool is very unstable, and it seems to me that much easier and more convenient to pull on itself rather than push forward. In general, for me this is not a very comfortable and safe way.
Now consider the variant when the sparks fly on themselves or under themselves:
It’s much more comfortable for me personally in this position. The tool is more stable and controllable, even if it blows out, it will fly forward and you will have time to react and hold on to it. Sparks do not fly in the eyes, but again, if the disk breaks, the debris will fly under your feet. In general, I think a more comfortable position and can not think of.
By the way many did not know that the position of the disc can be changed to do this just need to twist the handle and the button, as well as to shift the protective casing to the other side.
Preparing to work with an angle grinder
Recommendations on how to work properly with an angle grinder would not be complete without a description of the preparatory stage. First of all, you need to prepare and tune up for work.
The angle grinder becomes a very dangerous tool if you don’t observe safety precautions. So it is better not to pick it up when you are sick, too tired, and even less sober.
Fatigue and lack of concentration leads to carelessness, which in the case of the angle grinder can cost health and even life.
Safety glasses are mandatory for use with the angle grinder.
Protective equipment must be prepared. Safety glasses and safety guard must be worn. Cutting with the angle grinder and other operations are not permitted without them. Splinters, sparks, dross, and other things. all this inevitably appears when working with an angle grinder. And getting these particles in your eyes can cause serious injury.
The mask or goggles should be of the closed type. Fragments and sparks have an uneven path. If the mask or goggles are open, sparks can fly behind them. It is better to have a mask with a safety net.к. An unreinforced product can break at some point.
Protective cover. a barrier between the grinding machine and the operator. The grinding wheels break quite often during operation. It happened to almost everyone who occasionally uses an angle grinder.
In most cases the cause of wheel failure is jamming in the slot. install the guard so splinters and sparks do not fly in the direction of the operator. In case the wheel breaks during operation, the guard protects the person working with the angle grinder.
An opening in the shroud sets the splinter sector and protects the operator from injury.
The cover must be fixed so that there is no possibility of its spontaneous rotation. Sometimes it is very inconvenient to work with the hood installed, but remove it in any case, otherwise the consequences for the health of the operator can be the most adverse.
DRONCO Safety Basics. How to properly use an angle grinder?
Other protective equipment, such as gloves or mittens, must be worn in addition to eye protection.
The operator must keep his hands very close to the rotating wheel when operating the angle grinder, it is important to protect them from metal splinters, sparks and other particles that may be produced.
The best choice is a close-fitting pair of leather gloves. Cotton products do not guarantee good hand protection against sparks.
When sawing in masonry materials, you must wear a dust mask.
Always wear a dust mask when working with masonry materials and with no dust extraction device. Wear loose-fitting clothing that is well tucked in. It is important to remove all loose parts so that they do not become entangled in the rotating disc while working.
Working wheels for angle grinders deserve special attention. Each type of material is handled using a wheel specifically designed for it. Do not use grinding wheels that are not designed for the material being machined.
Do not fit larger discs than specified in the instructions for use. Small angle grinders operate at higher rotational speeds than large angle grinders.
Large wheels may not be able to withstand the high RPMs and break during operation. The bearings are under too high a load as the wheel rotates, which causes increased bearing wear and reduces the life of the angle grinder as a whole.
In addition, in order to set a wheel of impermissibly high dimensions, the cover must be removed, which is also forbidden.
When working with an angle grinder, only use complete discs without visible damage.
Do not use damaged or deformed grinding wheels. This can provoke a backfire and cause the wheel to break. Injury to operator is possible.
After the tool is installed, the angle grinder should be tested at least 1 minute at maximum speed. The wheel should rotate freely, and the vibration should not be stronger than usual.
Thus, in addition to the angle grinder itself, you will need:
- safety goggles or mask;
- An anti-dust respirator;
- special protective clothing;
- gloves made of thick leather;
- construction vacuum cleaner;
- suitable nozzles.
Having mastered all the features of preparation, you can begin to understand how to work properly with an angle grinder.
Instructions and recommendations for cutting with an angle grinder
Before starting to cut material, make sure that the spindle has reached full speed. Otherwise, the wheel can jam. The manufacturers of such tools recommend cutting so that the tool and the wheel move in the same direction. This eliminates the possibility of the cutting disc coming out of the slot uncontrollably.
Hold the working tool correctly when cutting. It is necessary to make sure that the cutting line for the trimmer passes the operator. It must not rest against it. This reduces the risk of injury in the event of grinding wheel jamming and breakage. There must be a protective cover between the operator and the cutting wheel.
When cutting with an angle grinder, you must never put too much pressure on it.
It is important not to apply excessive force to the tool during operation. The operator must do most of the work “by himself”. If it is overloaded, the wheel can tilt and jam.
The operator must control the movement of the tool by applying light pressure where it is needed. In case of profiles cut from the smallest cross-section.
Protect surrounding surfaces from damage and ignition
When you are in an enclosed area when cleaning the surface of an anvil, cutting pipes, ceramic tiles or other finishing materials with an angle grinder, take care to protect against sparks generated by the cutting tool. To do this, the nearby flammable objects, as well as the floor and walls need to cover a wet dense woven fabric or cloth made of asbestos.
When you perform each type of treatment, use only attachments that are designed for that particular application. All accessories are appropriately marked. Do not fit an angle grinder with a larger disc diameter than specified in the manual for that model. Small angle grinders have a higher rotational speed than larger angle grinders. Larger diameter discs that are designed for lower speeds can therefore be destroyed.
In addition, in order to put a larger disc, you will have to remove the hood of angle grinder, and it is prohibited by safety regulations. The higher rotational loads on this kind of engine have a negative effect on the bearings, causing premature bearing wear and reducing the life of the machine.
You should not use an angle grinder to cut ceramic or tile if it has a disk for cutting metal, because this material will crumble and split. There are other types of discs for working with such fragile materials.
Safety regulations do not allow the use of non-specialized saw blades for cutting in wood. Wood is a natural material with inclusions in its structure in the form of knots. If the cutting blade hits such unevenness, it causes a reactive shock and the angle grinder breaks free. Nails caught in solid wood can cause the cutting wheel to break. Specially designed for wood processing cutting equipment is available, but experienced professionals advise cutting wood to produce with an electric jigsaw.
Discs for angle grinders are classified according to their purpose:
- Cut-off wheels. Special cutting discs are designed for different material types. Abrasive wheel suitable for cutting metal pipes and angles. You can work with concrete or stone with a diamond cutting disc. You can use a thin diamond disc at low speed to cut glass with an angle grinder.
- Grinding and polishing. These discs also have a narrow specialization in the type of material they are used for.
- Deburring discs and brushes. Used for removing old paint, stripping, and other jobs.
- Accessories for working with wood. There are special discs for milling, sawing and sanding wood.
How to choose an angle grinder
The right choice of angle grinder. is the key to quality and durability of the tool. Therefore, it is necessary to take the purchase process quite seriously, paying attention to its basic parameters: the diameter of the cutting disc and power.
often than not, customers are wary of buying professional models, choosing low-powered machines. However, this is totally unreasonable! The fact that it is at machines with low power often happens disc jamming, when the device is simply not able to pull it out.
Professional models are safer to operate than low-power models.
Therefore, for beginners the best choice would be a tool with power 900-1000 W, spindle speed of about 10000 rpm and a 125 mm disc. These specifications are quite capable of sawing iron.
For working on metal surfaces, it is better to use models with a 115 mm blade and battery power. However, as practice shows, their considerable cost is not always justified in domestic use.
If the chosen model suits you according to its technical characteristics, but it is uncomfortable to hold it while working, you should think about another option.
Safety while working with the angle grinder
The use of grinding and cutting power tools is a hazardous activity. Therefore, when working with the angle grinder you need to consider the possibility of direct or indirect exposure to health hazards:
- cold or heat;
- poor illumination of the workplace;
- Strong noise, vibration from the machine;
- High physical strain;
- Rotating machinery;
- falling objects (processed materials);
- flying sparks and hard particles from parts;
- working at height, depth or in a confined, hard-to-reach place;
- danger of electric injuries.
To minimize the effects of hazards, and as a consequence, to save life and your own health, you can follow the safety rules for the operation of devices with open rotating parts. This requires the use of personal protective equipment (abbreviated PPE), well secured work pieces, choosing a safe place, starting and finishing work correctly.
Personal protective equipment
The name PPE, or personal protective equipment means means for individual use, which are used to protect against contamination, prevent or reduce the effects of harmful and dangerous factors. For most workers, this is overalls appropriate for the profession. It usually includes pants, jacket, headgear, closed shoes. Since the angle grinder is a high-risk tool, you must wear other protective equipment:
- goggles or face shield;
- Noise-proof headphones or earplugs (ear plugs);
- Vibration-isolating gloves;
- A respirator, especially while cutting stone, tile, concrete, or slate.
Goggles will protect from sparks, small chips, or grinding disc. The use of headphones or ear plugs helps to keep out noise, avoiding difficulties with hearing after work. Gloves will protect against abrasion and vibration. And a respirator for the large amount of dust produced.
Clamping of the parts to be machined
All small and medium-sized parts must be securely clamped in a vise or with clamps. When fastening, a safe place must be provided for the possible fall of the parts to be cut off.
Angle Grinder Tips. Tricks and Fun
Sometimes it is necessary to process with an angle grinder large parts or structures that cannot be fixed in a vise. These can be:
In such cases, you must ensure that the work surface is securely fixed (stable standing or lying), after treatment will not lose stability, and the cut part will not fall on the employee or others. In the slightest doubt should be supported by stops, jacks, or shoring and securely fasten the slings to the surrounding metal or reinforced concrete structures.
Regardless of where the workplace is located. in the garage, in the country house or in an open area, it must be well lit, meet elementary safety requirements.
Requirements to the workplace equipment:
- A workbench, table, shelf, cabinet or drawer must be installed for storage, as well as placement of devices, tools for productive safe work.
- All immovable equipment is firmly placed (fixed) on the floor.
- Bench and shelf surfaces must not be smaller than the workpieces and tools in use.
- The surfaces of workbenches are made of steel sheet, aluminum and other noncombustible materials.
- The vise must reliably clamp the workpieces to be machined. On the surfaces of the jaws of the vice should be a cross-cut of 0,5. 1 mm deep at every 2. 3 mm.
- Fix the vice so that the processed parts would be at the level of the employee’s elbow.
- When the vice is closed, the gap between jaws must not be more than 0,1 mm. Handle and jaws must be free of dents and burrs.
- The mobile part of the vice must not fall out when fully unscrewed and must move smoothly without jerks.
- The floor around the workbench as well as the entire work area must be dry and level.
- Electrical sockets for power tools should be above the level of the work bench surface.
When working at height (over 1.5 meters) you must use a scaffolding with a one meter railing and 150mm or more solid sheeting from below.
It is not recommended to use accidentally caught stands, barrels, boxes. The scaffold must not be overloaded. In any case, working with an angle grinder, you need to have under your feet flat, solid surface.
Correct starting, stopping and interruptions
Before turning on the device, it is worth carefully inspect and carefully check the disk. No tips with chips, splits, cracks or any other damage should be used.
Before turning on the power to the angle grinder to set the figure up cutting (grinding) wheel, then clamp it with the special nut. Observe the permissible RPM and dimensions in the tool’s technical data sheet.
Misalignment leads at least to defects in the work, premature disc wear, in the worst case. to injury.
When inspecting the tool, check that:
- there is no damage or cracks on the housing;
- The serviceability of the cable (cord), the protective tubes and the plug;
- The handle is well screwed;
- The circle is enclosed and the hood is securely fastened.
After that, check the work of the tool idle. To do this, connect the plug to the socket, turn on the power button and the detent. Watch for a minute the work of the angle grinder. Make sure it works without noise, excessive vibration, and the disk does not catch the protective cover. When disconnected, the power button and latch will become clear if it is malfunctioning or not. If everything is normal. you can get to work.
How to cut slate without an angle grinder
If there is no angle grinder, you can cut the slate with an ordinary hacksaw. A fine-toothed hacksaw with a fine toothed blade is better suited for this type of work. As a last resort, you may also use a hacksaw blade from a hacksaw for metal or a regular knife.
The main thing is the correct distribution of force and load on the sheet to avoid chipping and breaking the slate. Wave slate is somewhat more difficult to cut, and the sheet of flat sheet slate is easy to cut with any tool.
Sparks to yourself
When cutting metal with an angle grinder with sparks on yourself the risk of injury is much less, because if the disc is jammed, the tool will fly in the opposite direction from you if you don’t hold it in your hands.
But it is important that there is no one in front of you in the cutting line. The disadvantage of this method is that sparks fly in the direction of the operator and can burn clothes.
Of course, it is better than getting hurt, but still. unpleasant. Today in practice both of these methods are used, and in conclusion, we want to give general recommendations on which method of cutting with an angle grinder is better to use.
Angle grinder is a dangerous tool. When working with it, a number of conditions should be observed:
- It is forbidden to use the tool without safety glasses;
- Before cutting or polishing, check that the blade is in good condition when idling;
- Clothing must cover the hands and protect against hot sparks;
- Do not remove the guard from the angle grinder;
- During cutting on the plane master and assistant must be at the side of the tool;
- The machine cuts the material under its own weight, and excessive load will cause deformation or jerking;
- Work without a break leads to overheating of the equipment and fatigue of the master, who must firmly hold the angle grinder in his hands, observing the cutting angle;
- The workpiece to be machined must be firmly secured;
- Do not grind workpieces with the side of the cutting wheel, because there are specialized wheels for such work;
- A foreman and a helper must be located within the work area. All other people stand back at a safe distance;
- The radius of the cutting wheel should be 1/6 the thickness of the workpiece.
Working with defective disks
Health hazards often result from a distorted cutting wheel. Even small defects at high speed create unexpected results. A chipped, cracked or missing part of a disc causes the disc to become loose, which often results in the angle grinder just flying out of hand. That’s why it is better to check the consumable for defects before you start cutting, and do it just before you start, because the damage could be caused by falling or affecting the disk externally. Sometimes the plate can be stepped on, and the master simply will not notice it.
Despite numerous warnings about not working with defective discs, there are situations when the master simply did not visually see the defects. This kind of situation is not uncommon and you should follow some rules to make sure you don’t get hurt:
- Check consumables for defects before every setting up or cutting operation;
- Wear personal protective equipment only: gloves, goggles or face shield.
the angle grinder is most often weighted in the hands of the craftsman and has no point of support, so you should approach the process of cutting or polishing extremely collected and sober. People with an unbalanced psyche or poor health should not start working with the angle grinder.