All types of brushes for a small angle grinder. Surprises from the corset. Advantages and disadvantages of working with her. Wood sanding attachments
Often in life there is a need to clean materials that have a large area. As an example, this could be a gate from steel sheets that you need to derust and paint. Also, sometimes you need to clean boards and other similar materials from dirt. What to do if you don’t have a suitable tool at hand, but you don’t want to buy expensive cleaning machines? There is a way out, you can use your cool nozzle, which will allow you to quickly clean large objects.
The design is very simple, the nozzle is a shaft that rotates on just one bearing, the second bearing is the one installed in the angle grinder. In total, as many as 6 brushes are installed on the shaft, which greatly increases productivity. The body is made from sheet metal. You just need to fit the parts and weld them. The brush shaft itself is made very simply. So, let's take a closer look at how to make such a nozzle.
Materials and tools used
List of materials:
- 6 brushes for the grinder;
- threaded rod and nuts (for the manufacture of the working shaft);
- bearing;
- Sheet steel;
- a cylinder of suitable diameter (for the body);
- thick sheet steel (for clamping bracket);
- dye.
List of tools:
-
- vice;
- drilling machine;
- welding machine;
- tap;
- spanners.
Homemade manufacturing process:
Step one. Manufacturing of side parts
From sheet metal, you need to make two parts, these are the side parts of the homemade product. One of them will have a bearing installed. The steel should be quite thick, at least 2 mm is needed to obtain the desired rigidity. We cut out two identical parts, as the author in the photo. This can be done with a grinder. The final adjustment is made using a grinding nozzle to remove all irregularities.
The next step is to drill holes, for this you will need a drilling machine with the appropriate bits. In one part, we drill a hole of such a size that the “nose” part of the grinder, where the bearing is installed, can go there.
As for the second part, it is enough to drill a hole in it with a diameter slightly larger than the working shaft. You will also need to drill two more small holes to secure the bearing with threaded rods and nuts.
Step two. We make a clamping bracket
To mount the nozzle on the grinder, you will need to make a special bracket. To make it, you need a thick piece of steel. Let's go to drilling machine and with the help of a 44 mm bit we drill a hole, do not forget to use lubricant for cooling.
When everything is ready, we retreat about 1 cm from the cut hole and cut it out. You also need to remember to make "islands" where the tightening screw will be installed. How the product should look like, look at the photo. We cut it out with the help of a grinder, it is a little long and tedious, but it is quite solvable. Grinding with grinding discs.
Now we clamp the workpiece in a vise and cut the ring so that it can be compressed, you need to cut out some metal. Well, then we drill a hole, cut the thread and wrap the screw.
The clamping bracket is ready, now it needs to be installed on the plate made earlier. To do this, you will need a welding machine. You need to weld only in one place, since the bracket must be compressed with us.
Step three. We install the bearing
To install the bearing, you will need two bolts or just threaded rods. They need to be welded to the second plate, as a result, studs will be obtained. Secure the bearing with washers and nuts.
But before the final mounting of the bearing, it still needs to be finalized. Inside, you need to press a piece of pipe so that the shaft fits tightly into the bearing. For these purposes, the author uses a vice.
Step four. We make a working shaft
To make the shaft, we need a threaded rod of suitable length and diameter. Weld a nut to one of the sides, it will be needed to connect the grinder to the shaft. Well, then install the brushes! In total, you will need 6 pieces, just screw them onto the threaded rod, do not forget to install a washer between each brush. We tighten every detail wrench.
That's all. You can immediately install a part with a bearing on the shaft, we fasten the shaft with a nut.
Step five. Making the mounting bracket
The bracket that will be attached to the grinder needs to be finalized. Although it tightens well, it can turn over under high load, and this is extremely unsafe. For these purposes, the author welds an additional fixing plate to it, at the end of which there is a hole. Now you can additionally fix the structure with a bolt. What is at stake, look at the photo. At the end, install the workpiece on the grinder.
Step six. We make the case
The case is a protective shield, it also connects both parts together. Steel for this will also need to be quite thick, and in order not to be wiser with the profile, look for a cylinder that is suitable in shape. It could be an old fire extinguisher, or something similar. We take the necessary measurements and cut out the desired part.
Well, then it’s a matter of technology, we take a grinder and grab the parts together. It is desirable to do this with the shaft installed on the angle grinder so that there are no distortions. Well, then you can remove the nozzle and finally weld everything. Cut off the excess parts after that, if any remain.
Step seven. We manufacture and install the handle
The handle is very important for such a nozzle, it is responsible for ease of use, and, of course, for safety. To make a handle, you will need a piece of steel pipe. We cut it at the right angle and weld it. Finally, weld the handle to the nozzle well. In the future, it will be possible to put a piece of rubber hose or something similar on it to keep it nice. You can also clean the welded seams of the handle. Home \ Accessories and consumables \ Brushes for grinders (brush)
IN various fields human activity, where the processing of materials is necessary, a significant role is given to grinding. After all, the product will not look finished (and in most cases will lose functionality) if it has bumps and burrs. To do this, use special grinding materials, among which great benefit bring attachments for an angle grinder ( we are talking about the "grinder", as it is called in everyday life) in the form of brushed brushes. Read more here.
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What are the brushes for grinders?
Manufacturers today offer various options execution of brushes for angle grinders. First of all, they differ in the material for the villi, depending on which nozzles are divided according to their rigidity. For example, for hard brushes, a towed wire made of of stainless steel. The choice of this material was not accidental, because it allows you to work without much wear in quite aggressive environments. The alloyed metal endures the influence of high temperatures that occur during processing (it is also worth considering the fact that heated products are often processed with such equipment). The protective layers do not allow the metal to be affected by corrosion, which significantly increases the service life of the angle grinder brush.
Soft brushes are most often also made of metal wire, but its diameter is noticeably smaller. If hard options come with dimensions of 0.5-0.7 mm, then for these they already use a wire with a diameter of 0.3 mm. They provide gentle cleaning, which is ideal for final processing of products. At the same time, you can find both wicker options and corrugated ones (the choice depends on the type of work being done).
What brush to choose?
Another point that you should pay attention to when buying is the shape of the nozzle. For angle grinders, two options are most often used: “cup” and “disc”. Disc-shaped brushes are used to process joints and joints in hard-to-reach places ah, for example, grooves or corners. Cups are ideal for processing flat surfaces, especially - a large area.
And the last parameter by which brushes for angle grinders differ is the diameter of the nozzle. Basically, you can purchase options with a diameter of 115 to 200 mm, although there are other sizes (the main thing is not to confuse, because the manufacturer often makes similar nozzles for a drill, drill and other devices, they may have completely different characteristics that are not suitable for " Bulgarians").
Based on the above points, you can easily choose the right brush for your angle grinder. But if you have any questions, then qualified advice from our representatives is always at your service. They will be happy to give you answers and explain the features of each of the products presented.
stroi-instrum.ru
How to choose a corset and how to work with it?
Metal brushes for grinders amaze the imagination with their variety. Their main purpose is to clean metal from old paint, from corrosion. True, there are also hand brushes with wire bristles for small amounts of work.
What kind of tool is a grinder?
A grinder or an angle grinder is a versatile and necessary tool in the household. This tool is used by painters, locksmiths, carpenters have in their arsenal. Its significance varies depending on the nozzles used. Put a circular disk on the machine - and you can cut wood. More often, the grinder is used in locksmith work for cutting metal: pipes, fittings.
But its main purpose is grinding work. With the increase in secondary sales of cars, the demand for their repair and painting is growing. The most difficult stage in this work is preparatory, that is, cleaning the surfaces of machines from old paint and primer. The cleaner the body is before the new primer, the better the new paint will hold. In this work, a grinder with a set of grinding brushes plays a leading role.
What are the brushes?
Metal, bowl-shaped koroschek appeared relatively recently. And before that, grinders worked mainly with sandpaper different types or emery stone discs. Paper, no matter how high their rigidity, was quickly clogged with ink particles or erased. It often had to be changed, which reduced productivity. Working with a metal brush for a grinder is much more effective in this regard.
Virtually every leading tool manufacturer has seen fit to bring their brushes to market. And each manufacturer has its own approach, its own exclusive in the development and manufacture of a metal nozzle for angle grinders. Some cork brushes are made from a single thin wire, others from a twisted cable, and still others from a corrugated corrugated wire. Wire cord brushes differ in diameter, stiffness, bristle quality. Corsets as nozzles for angle grinders are:
Metal brushes are made from:
- become;
- steel with brass coating;
- brass;
- copper.
There are polishing brushes for processing metal surfaces and woodwork. They are made from nylon and other polymers, dried seaweed, cotton fibers.
The hardness of processing depends on the structure of the wire, its hardness and thickness. The thinner the wire used in the manufacture of the brush, the softer it acts on the metal. To clean the surface old painting on initial stage it is better to use a nozzle with hard bristles, and for the final cleaning of the remnants of the primer and other materials, a nozzle with less rigidity is suitable, which will not “eat up” bare metal.
For the manufacture of cork brushes, wire is used:
- Corrugated. This brush, due to its springy properties, softens, on the one hand, the impact on the metal, and on the other, the vibration of the machine is reduced.
- Twisted. The bristles twisted together provide rigidity to the surface, break less and fly out as they wear. Twisted fragments are untwisted, freeing the bristles for work.
- Smooth.
The brushes differ in the diameter of the cup, which determines the parameters of the simultaneously treated surface. Brushes for angle grinders are consumables, but manufacturers are concerned about making them as efficient as possible and extending their life.
How to call them correctly?
In the network and on the labels there is a discrepancy in the name of the nozzles. Some call them cord brushes for a grinder, others call them cord brushes. What are they really called? Cord is translated from English as a string, cord, rope. And if you look closely, these nozzles are made from a variety of steel (or nylon), cut into short bristles, strings or twisted cords. So the essence of this name becomes quite clear - cord brush. Those who write korshchetka obviously took the name of the nozzle by ear, and since the letter “d” is most often swallowed during pronunciation, they began to write it that way. I don’t know about spelling dictionaries, but the Word program in which this article is being written recognized the spelling cord-brush as correct - with a hyphen.
Brushing as a process of working with a brush
Brushing is the process of treating metal surfaces. metal brushes in order to remove loosened sludge or scale formed during the pickling process. This work can be done manually or with power tools. The brushes for angle grinders themselves are called brush heads. With this treatment, the porosity of the galvanic deposit decreases, it becomes denser. The processed surface turns out more uniform.
Brushing of steel surfaces is carried out with steel brushes with a wire diameter of 0.2–0.4 mm. Non-ferrous metals are processed with copper or brass wire brushes. Electroplating is also subjected to brushing in order to increase the density of the coating and give it shine.
Brushing is done according to:
- dry surface;
- surfaces wetted with water, soap or soda solution.
When brushing with metal brushes, abrasive pastes are not used, since the ends of the wire bristles serve as the abrasive.
How to choose a quality brush?
When choosing a brush for angle grinders, pay attention to the bristles. It should be distributed evenly over the entire disc, the bristles should be the same length everywhere and evenly distributed around the entire circumference of the calyx. It is unacceptable when the bristles are thickened on one edge and thin on the other. Such a brush will beat in the hand (vibrate), cleaning will be uneven, and the brush itself will fail very soon.
Among the parameters for the wire nozzle, manufacturers indicate the recommended speed for the machine. This indicator should not be ignored. If you put the brush for low speed on the machine with high speed rotation, it will not give the desired result and will quickly fail. Conversely, a metal brush that the manufacturer has designed to operate at high speeds will not work at low speeds with proper performance.
The smaller the diameter of the cup, the less the load on the engine of the machine, the less vibration, and, accordingly, the less tired the hand. But the larger the diameter of the cup, the fewer passages are obtained. Which brush to choose? There is no definite answer here. Sometimes masters have time to try several brushes different diameter and different bristle stiffness before they find best option. The choice of cork brush often depends on the quality paintwork. After all, as you know, different enamels and primers have different density coatings.
Creative thinking our people knows no bounds. This recommendation, aimed at improving the performance of brushes, was found on the forums of the masters.
Everyone knows that the bristles of the sanding head wear out over time, and this abrasion rate depends on the stiffness of the bristles and the aggressiveness of the surface to be treated. In some brushes, the outer cup is larger than the inner cup, which allows you to extend the life of the brush a little, by 15 percent. This can be achieved by cutting off the upper edge of the outer cup of the brush by 5–7 mm.
Safety
In the process of processing surfaces, whether they are metal surfaces or wood, safety precautions must be observed. The fact is that the higher the speed of rotation of the disc on the angle grinder, the faster the brush wears out. Metal bristles fly off from it, grains of scale and metal burrs fly off from the treated surface. It happens that the cup does not withstand the load, and the brush itself shatters.
And all this literally shoots at a working person. Therefore, when working with such a brush, you need to have goggles, a respirator, gloves, and preferably tight overalls. Even if the sun is shining and the heat is unbearable.
The loud sound of the grinder is tiring, making the worker irritable, so it is also recommended to have headphones. Some workers combine business with pleasure and muffle the sound of their grinder with their favorite music by inserting headphones from a player or phone into their ears.
pro-instrument.com
Cup brushes
Helpful informationFor initial processing and grinding metal parts a corset cup is needed. Tooling for a drill does an excellent job of removing rust, various contaminants, old paintwork from metal.
The nozzle has the shape of a cup. On the working surface there is a brass wire twisted or twisted into several bundles. Attached to the tool with a nut located in the center of the cup brush and having internal thread.
What to look for when choosing cup brushes for grinders
The thread of the mounting hole of the nozzle must necessarily match the size external thread tool spindle. The most commonly used thread is M14, there are brushes, for example, with M10 thread.
The brush diameter is selected based on the surface area to be sanded. If you want to process, for example, the wall of a small barbecue (20x20 cm), then a cup with a diameter of 60 mm will do. For large areas, for example, profile sheets (150x150 cm) will require a nozzle with a diameter of 150 mm.
You can buy a corset cup in our online store. Call 8-800-333-83-28 or order a call from the site.
Manufacturers
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Metal brushes. The basics of using brushes for grinders, drills and machine tools.
Every man is familiar with metal brushes. They are used in all areas of mechanical processing of any materials. They are effective, easy to use and have a low price.
But the correct selection and use of technical brushes will increase the performance and resource of brushes, as well as improve the quality of processing.
To work correctly with a brush - to achieve the quality of processing.
In this article, we have collected information about correct selection modes of operation and the choice of technical brushes that are optimal for solving your task.
The method of selecting the operating mode.
In case of insufficient effect, you should:
- Increase the speed by using a larger diameter brush and/or increasing the RPM (do not exceed the maximum allowed!)
- Use a brush with a shorter bristle
- Apply a brush with a larger diameter wire
If the effect is too strong, you should:
- Reduce speed by using a smaller diameter brush and/or reducing RPM
- Apply a brush with a longer bristle
- Apply a brush with thinner wire
When filling up burrs, you should:
- Increase speed and/or use a shorter bristle brush
- Check the position of the brush and the workpiece: the brush should hit against the cutting direction and work with the tips of the wires
- Use a wider brush
- Use a brush with a larger diameter wire
Correct clamping force.
A prerequisite for successful brushing is a light pressure, as only the tips of the wires do the work. The lack of speed cannot be compensated by the clamping force. Squeezing destroys the brush faster.
Line speed.
The speed indicated on the brush or in the catalog is the maximum safe. Usually, the operating modes of brushes are much lower than safe ones.
To use quality correctly is to work effectively.
Processing of welds.
Cold-drawn wire is used with a self-sharpening effect that provides bare-metal stability that outperforms competitors by up to 25% in tensile strength and up to 13% in hardness.
Treatment of hard-to-reach places.
Pay attention to conical brushes that make possible processing in right angles. But at the same time, they can be used for processing edges, grooves and surfaces, including concrete.
Speed not less than 35-45 m/s, *6000-12000 rpm.
Surface cleaning from rust, paint.
If you are working on a surface with an angle grinder, such as body work or a fence, then use a cup brush. For drills cup or cylindrical with a shank.
Shank brushes 3000-15000 rpm
Deburring
Corrugated wire technical brushes are best. Important speed is not less than 35 m / s, work with the tips of the wires and the direction of rotation of the brush against the direction of cutting.
Removing the anti-corrosion coating
Speed not less than 5-25 m/s * 3000-15000 rpm
Body work
Removal of rust and paint without thinning the metal, without the cutting operation characteristic of abrasives, with a subsequent decrease in corrosion resistance.
Speed not less than 5-25 m / s (cleaning) 35-45 m / s (finish)
*3000-15000 rpm
Removing tarnish colors
Corrugated stainless wire shank and cylindrical brushes easily remove tarnish from welds. Unlike the use of chemicals, there is no need for washing, drying products and special storage of chemicals.
Speed not less than 30-40 m/s * 10000-15000 rpm
Cleaning, Texturing and Finishing with Polymer Abrasive
Well proven when processing soft sensitive surfaces. The brushes are suitable for processing wood and plastic. Prevent overheating - the polymer bond of the abrasive has a relatively low temperature melting.
Speed not less than 5-20 m/s *1000-4500 rpm
Processing in cavities
End brushes also pass into small holes. End harnesses open with increasing speed and can process hidden grooves and internal surfaces.
Speed not less than 5-35 m/s *3000-15000 rpm
Universal Tool
If you are unable or unwilling to use the drive, use hand brushes. Pay attention to the correct choice of pile material depending on the material being processed.
Note:
There are brushes with a shank for drills that can withstand a maximum speed of 4500 rpm, and professional ones that can withstand up to 20,000 rpm.
The higher the speed, the higher the cleaning effect, as a rule.
Thick wire (0.50-0.80 mm) for rough, aggressive cutting.
Fine wire (0.10-0.35 mm) for finishing.
Steel wire: for processing metal surfaces.
Steel wire rope: increased hardness and self-sharpening effect.
Corrugated steel wire: flexible, different aggressiveness depending on the wire diameter.
Stainless steel wire: for processing stainless steel and aluminium.
Brass wire: for soft materials, bronze and copper.
Polymerabrasive: finishing, roughening and texturing.
When you have chosen the right operating modes and selected the right brush, it is important not to forget about the most important thing - safety.
Observe the necessary safety measures when working with power brushes:
- People who are in the area of work with power brushes must wear goggles or a mask.
- Inspect the brush before use for mechanical damage
- pay attention to correct fastening brushes for driven tools
For your safety: wear protective clothing.
angle grinder(angle grinder, in other words, a grinder) is a power tool that is actively used as household craftsmen and professionals in their field. With the help of such equipment, you can not only cut the metal into separate blanks, but also prepare the parts. But this requires buy a special nozzle- a brush with a pile located around the body of the device, which is often called a brush or cord brush.
In addition, periodically the brushes "fail". This happens due to the high loads that the nozzles are subjected to during work, because it is a consumable material. Thus, this part needs to be replaced. In both cases, the performer needs to know which brush to choose. To do this, you must possess manufacturers and trademarks. Responses to data topical issues given in our article.
Functions: for cleaning, paint removal
Cord brushes for grinders are used in all areas where mechanical processing of any materials is required. The brushes are easy to use and effective. and what is important - have a low cost. The right choice increases the performance and life of the brushes, as well as improves the quality of the work performed.
Brush for angle grinders, corrugated wire. Photo All Instruments.ru
With the help of cord brushes performers carry out the following operations:
- deburring;
- removal of rust, paint, varnish, anti-corrosion coating, slag, scale, resin, sealant and other contaminants;
- grinding;
- polishing;
- grout;
- texturing;
- wood brushing;
- grinding sharp corners;
- removal of discoloration.
Such operations are often performed during welding and body work. Since welding is common in almost all areas of activity, brushes are also in high demand among customers of various categories.
Types of cord brushes on angle grinders for wood and metal
The criteria for the typology of brushes are the configuration of products, the material of the pile, the size (diameter), and the type of wire. Each type of brush has its own characteristics and is suitable for certain operations.
Production material
The material from which it is made bristles for brushes, is the main criterion for classification. Depending on the material of the processed products, appropriate nozzles should be selected.
Metal (iron), brass, copper
cord brushes with metal pile the most popular. They are versatile, with their help it is possible to perform different kinds works. This type of nozzle includes brushes with pile not only from metals (steel, copper), but also alloys, in particular brass. The latest version of the nozzles is designed for processing soft materials, bronze and copper.
Cup brush for angle grinders with a bristle of twisted metal wire. Photo
Steel: stainless steel (stainless steel), brass plated steel
Nozzles with a pile of steel are designed for processing metal surfaces. Cord brushes with bristles stainless steel should be used for work with products from the corresponding material, as well as from aluminum.
Cylindrical brush with stainless steel bristles. Photo VseInstrumenty.ru
This combination provides high quality processing. There are also models with brass bristles, i.e. steel bristles are covered with brass, which provides protection against corrosion.
Reference. Often, steel and metal cord brushes are combined into one category.
Nylon (polymer)
Nylon and other polymer tips are suitable for polishing metal products , run woodwork, finishing, texturing, roughening. In addition, brushes made of similar materials are designed for parts made of soft metals.
Forms
There is a wide variety of nozzle configurations for grinders. Each type is used to certain works. The right choice provides convenience for the performer and quality.
Round
Despite the large list of shapes, all cord brushes have a round shape. clearly given fact shown in the illustrations.
Bowl-shaped, cup-shaped
Cup cord brushes are the best fit for processing large surfaces.
Cup brush for angle grinders trademark. Photo by InstrumentLend.ru
conical
Tapered brushes should be used for work with products, the surface of which has recesses.
Radial
Flat brushes, which include radial, are used for processing surfaces located in narrow and hard-to-reach places.
Radial brush for angle grinders with a pile of twisted steel wire. Photo
Disk
Disc nozzles are the most common, they also have a horizontal plane. Therefore, they fit perfectly for surface treatment in narrow places.
Disc brush for angle grinders, twisted steel. Photo 220V
Wire
For the manufacture of bristles for nozzles, various types of wire are used.
twisted
Nozzles, the working part of which is made of twisted wire, are brushes with villi twisted into bundles or in a chaotic manner. Such a structure provides impact severity, the bristles break less and fly out as they wear.
Brush for angle grinders, "plate", twisted wire. Photo
harness
Cord brushes are twisted bristles. Such devices are characterized by increased hardness and self-sharpening effect. They are used in particular for the removal of rust and scale.
Cup harness cups. Photo
Corrugated
Corrugated villi have a number of wavy bends. Such bristles have springy properties, which softens the impact and reduces the vibration of the angle grinder.
Cup brush with corrugated steel wire. AllTools.ru
flat
Flat bristles are standard for mechanical processing of metal, steel, wood.
Cup brush with a straight line. even bristles. Photo
Dimensions
Speaking about the sizes of nozzles for angle grinders, they mean diameter. Allocate small cord brushes, the dimensions of which do not exceed 115 mm. Such devices are used for processing small surfaces. Their use is relevant both in everyday life and in production conditions.
Brush for angle grinders. small, diameter 65 mm. Photo
There are also large brushes with a diameter of 115-200 mm. Designed for industrial applications, suitable for grinders of considerable power.
Other types: manual and for a drill
Particularly popular are drill bits and hand cord brushes. Devices are often combined with brushes for grinders.
Hand brush with metal bristles and wooden handle. Photo
They represent a separate group of consumables. Demand for brushes for drills and hand tools due to the variety of species. A wide range ensures the best choice.
How to choose?
When choosing a nozzle for an angle grinder, you should pay attention to the following details:
- Pile must be distributed evenly have the same length. Otherwise, the brush vibrates, the processing is uneven and of poor quality.
- An important parameter is recommended machine speed. If you put a low-speed brush on a high-speed grinder, it will quickly break. The fast spin brush is ineffective on a low speed machine.
- The less cord brush diameter, the lower the load on the engine and, accordingly, the vibration. As a result, the hand gets tired less. But the larger the diameter, the fewer passes need to be made. Accordingly, less time and effort wasted.
Nozzles on the grinder give the machine a lot functional purposes. One of them is working with wooden surfaces. Even the use of a tool in the garden for cutting down trees is relevant today, especially in spring and autumn time of the year.
grind wooden surface, for example, a floor or timber used for building structures- this is an absolute necessity so as not to get injured from protruding layers of wood.
Grinding nozzle on the grinder for processing this kind of surfaces, as a rule, is available in retail, and it is not difficult to choose it according to the size of the landing diameter. Usually a grinding wheel is used for this.
But to get the job done right:
- It is necessary to study the condition of the treated surface to the subtlety. To do this, it is recommended to mark the area for processing with chalk or to carry out preliminary troubleshooting of the surface in order to exclude additional inspection during the work and purposefully perform the task. This method will significantly reduce the time costs.
- You should pay attention to the presence of fungus on the surface, as well as cracks and chips. Before using the tool directly, these defects should be eliminated.
- The presence of black spots is also alarming, so they must first be treated with a special compound. The pores will open, and the front of work will be visible.
There are some nuances that make it impossible to carry out work with high quality, for example, the circles from the grinding wheel still remain, and a separate refinement of the surfaces using sandpaper is required.
With all of the above, it is not necessary to neglect and simple rules for safety:
- The circle should be free of chips, cracks, and when touched with a metal tool, it should make a ringing sound.
- The date of use of the circle must be indicated on the circle itself.
- It is unacceptable to work without a protective screen.
- The worker must wear overalls, shoes closed type and a headdress.
- Before direct use, carefully inspect the cable for bare wires.
- The attachment for the grinder must be firmly fixed on technical means to avoid flight.
- Before performing the task, you need to test the operation of the mechanism by idling.
Types of grinding devices
If you choose the wrong cleaning circle for the grinder, the ongoing process can take a long time. But it also does not make sense to buy an expensive tool and accessories for it, since the operations may differ from each other.
On modern construction market there are many offers to purchase a nozzle for a grinder.
List of nozzles and what they are intended for:
Manufacturing technology is as follows:
- at one end of the handle, a special device is made necessary to secure the technical device;
- on a fixed shaft structure, the end of the tube with an angle grinder with a previously welded corner for movement is fixed;
- With reverse side fasteners adapt a spring that allows you to return the machine to its original position.
Everything is quite simple and reliable and everything is done in one place.
- Cutting discs. Angle grinders are also used with special cutting discs. The latter are available for retail sale in large assortment. They can be used to cut hard surfaces.
Some disc features:
- on the most round form of the disc there are about 6 cuts that do not reach the central axis;
- the device of the segments contributes to rapid cooling during operations for cutting a metal product;
- they are used for cutting wood, brick, concrete and metal.
Diameter parameters vary from 150 to 200 mm. The thickness of the packing layer depends on the characteristics of the material to be processed. For example, for cutting wooden products 2 or 3 mm nozzle thickness is sufficient. Many discs are made with diamond coating. This solution provides strength during processing and eliminates the risk of injury, because the circle cannot scatter in different directions.
Polishing and grinding discs can be made of various materials:
- cloth;
- felt;
- from sandpaper;
- their sponge materials.
The use of a special paste for the nozzle is mandatory to eliminate strong friction on the surface. These discs are used to repair car bodies.
For tool sharpening and peeling, 3 types of nozzles are mainly used:
- Diamond grouts. They are used for sawing stone as well as concrete surfaces and brick. But for metal products, their use is unacceptable.
- Abrasive grinding discs. They are used for cutting metal surfaces to a fairly large depth. The outer side of them has smooth surface, and the inner one is rough. They are used on angle grinders of small size.
- Twisted discs with cutters. Used to remove paintwork from stone. The surface becomes perfectly even and smooth.
The support plate for angle grinders is designed for fastening wheels on emery or fabric bases during grinding operations. Fastening around is carried out using a pressure washer, and the coating allows you to process even difficult surfaces.
Final part
Today, without the use of an angle grinder, it is impossible to imagine modern production, as well as in the garage, almost every owner on the farm has this technical device. Its use is multifunctional, and applicable to any type of work, both repair and for the manufacture or processing of any assembly unit or product. Nozzles for angle grinders also have different functions, which allows them to be used according to different directions. Therefore, it is not necessary to contact the repair shop, and all the main part of the work can be done independently.
One of the most popular, both in domestic and professional use, tools for repair and construction work is considered to be a grinder, or an angle grinder (angle grinder).
The grinder, like any working tool with an electric mechanism, is especially susceptible to stress. Despite the protective impact-resistant case, small items dirt and dust, which sooner or later leads to failure individual parts or the entire mechanism as a whole, namely, the contact of the collector with the brushes is disrupted. In the operation of this tool with a metal that is a conductor, the penetration of its particles into the part of the contact location of the collector and brushes leads to a short circuit and overheating of the copper plates. This, in turn, leads to melting and increased burnout of the brushes, as evidenced by the appearance of sparks.
Since when using an angle grinder it is impossible to avoid various kinds of pollution (sawdust, dust, etc.), replacing the brushes is an essential condition correct operation tool. Moreover, the brushes are most subject to wear. No wonder brushes that fail spark and burn. The brush is a hexagon with parallel equal faces and with an electrical contact, with the help of which current is conducted to the collector.
If the grinder during operation suddenly began to work jerkily or twitching, the first thing to do is to look at the brushes. If their wear is not detected in time, a burning smell will occur, and the tool itself will stop working altogether.
Thus, for safe and effective work angle grinders, it is necessary to control the mechanism of action of the electric brushes, and for preventive purposes, regularly clean the collector.
In most models of grinders, the electric brushes are inside the handle (see photo). This arrangement is due to savings in the production of the case, as well as more comfortable operation of the tool due to its compactness. On some other models, for the convenience of quick replacement of brushes, the screws are located directly on the housing. In any case, it is more expedient when replacing brushes to also clean and lubricate the entire tool, and for this it must be disassembled.
Regardless of the location of the electric brush, first you need to disconnect it from the angle grinder electrical circuit. The tips are removed, a visual inspection of the holder design is made, and the brushes are pulled out, as shown in the photo. If chips, abrasions and other evidence of wear are found, they are replaced with new ones.
Usually, along with the grinder, a spare rem is issued upon purchase. kit that includes brushes. They can also be purchased at any specialized store. It can be difficult to find suitable ones for some models of grinders, so brushes are purchased a little more right size and neatly filed. If the tips differ, the leash from the old brush is attached to the new one.
Interskol
For Interskol angle grinder models, in order to pull out the brushes, it is necessary to remove the rear cover of the stator housing. Then the screws are removed from the holder.
The wear of elements is determined by their residual length. The length of the working carbon brushes cannot be less than 5 mm. For a more detailed study of the technology of changing brushes, you can watch the video.
Bosch
Access to the electric brushes at Bosch angle grinders is carried out by opening the handle of the stator housing, which is held on by a screw. The length of the working electric brushes of the coal type must be at least 8 mm. By the way, carbon electric brushes for Bosch are distinguished by the presence of a device that stops the operation of the tool when the brushes reach the minimum operating length.
Makita
In the Makita angle grinder, the screw is unscrewed and the case back cover is removed. The Makita 9565 model uses carbon brushes with auto-off.
Selection of electric brushes
Brushes differ in size range, shapes, material of manufacture. Previously, they were produced in the form of a structure consisting of copper wire and conductive brush. But due to very rapid wear and tear, it was decided to modernize such a design. At present, electric brushes are produced by pressing at high temperatures carbon material.
These replaceable elements of the mechanism cannot be underestimated, because the service life of the engine depends on the correct operation of the brushes, because by replacing the brushes in time, you can protect the angle grinder from destroying the armature collector plate.
Types of brushes:
- Graphite brushes. During production, graphite is associated with a special composition, in which soot can be added. Further, under pressure, molding takes place, and after firing. The difference in the production of such brushes is due to giving the material additional strength and wear resistance. They are made of carbonaceous materials (graphite, soot) and binders. After the standard molding procedure, graphitization follows, which involves a temperature firing of 2500-2600 ° C in specialized furnaces. Such electric brushes are the most common for the use of angle grinders. Despite the comparatively higher price point, the benefits of the properties outweigh the high cost;
- Carbon brushes. The main material for the production of these brushes does not differ from graphite. The difference in production technology is the absence of heat treatment, which reduces production costs. Hence the low price tag in stores. But the wear resistance of such brushes is negligible.
- Metal brushes. The composition of raw materials for the manufacture of brushes includes not only graphite powder, but metal. Mostly copper powder is added, but lead, tin or silver can also be added. At the same time, the metal base of the powder in the composition contains about 80%. Such brushes are used in generators and electric motors, because they are highly durable and reliable. But they are very rarely used in household electrical appliances. The price category is high.
Before buying electric brushes, it is better to look in the instructions or in those. grinder's passport, which brushes the manufacturer recommends. Also on the choice of the necessary brushes, you can consult the service centers.
