Corner Sander(angle grinder)

Wide selection of power tools Russian market designed to facilitate different types self made. If in professional field the purchase of specialized equipment is simply necessary, but in everyday life it is not always rational to spend money on an expensive tool, which after completing a certain job may not be useful at all. The most popular power tool is the angle Grinder(angle grinder). The scope of its application is not limited to metal processing - grinding wood with a grinder is done using special attachments.

For those who don’t know “Is it possible to process wood with an angle grinder?” this article will be useful. To perform grinding and polishing wooden products or large array surfaces, you will need to purchase an appropriate nozzle - a circle. For Bulgarians different sizes nozzles are selected that are designed for a certain rotation speed. Special discs designed for wood processing must be carefully selected. The disk must match the dimensions of the tool; a special nut is used to secure it.

When working with angle grinders, it is necessary to strictly observe safety precautions and use only factory-made wheels that are suitable for a specific model of power tool.

Processing wood with an angle grinder

Coarse grinding discs for wood for angle grinders

There are several types of circles that differ in shape, material of manufacture and purpose. Usually, wooden blank First, the surface must undergo rough processing, after which it undergoes finishing or final detailing of the coating with abrasive segments.

For such work, there is a special attachment on the grinder for sanding wood. The most popular are:

• Grinding circles. This type of sanding attachment on an angle grinder is best used to remove a layer of old paint. Also suitable for varnished coatings that cannot be removed by hand. This could be a wooden floor painted several times or a window sill. The design of abrasive discs consists of a disc and metal bristles made of elastic wire. Nozzles are available with different arrangements of steel bristles. Depending on the desired effect, the bristles can be placed along the entire perimeter of the disc parallel to the tool or perpendicular to the segment - as in a regular brush.

• Cord brushes are a disc with a coarse abrasive coating designed for rough sanding and removing uneven surfaces on a wooden surface. By using of this instrument the wood blank takes on its final shape. The work productivity is significantly higher compared to conventional hand tools.

• End discs. Nozzles are used when you need to level a product from the end. Miter cuts and edges of the workpiece require such processing. The technique is identical to a file, but the efficiency of the abrasive exceeds that of hand tools. When working with a segment, it is important to have skills, and then such a simple tool can completely replace a molding cutter in terms of edge processing.

Using a grinder for polishing wood, you can completely restore furniture covered with varnish and paint. After such cleaning the thickness wooden base practically does not decrease, but newly painted furniture will look beautiful and impressive.

When performing grinding work with an angle grinder, the choice of tool is not so significant compared to the presence of well-dried wood and the absence of cracks on the surface.

Grinding wheels for gentle processing and their areas of application

To sand wood with a grinder, attachments of a universal design and with a special gentle coating are used. Such mechanical restoration intended for specific work:

• The flap disc is used for grinding solid wood. The design of this segment corresponds to its name. His working surface equipped with a large number of trapezoidal petals of sandpaper, which overlap each other like fish scales (three-quarter overlap of the previous row). With this arrangement of the petals, abrasion of the nozzle occurs much more slowly.

This is the most common type of grinder attachment for sanding wood, which performs soft surface treatment, and the tool itself is less traumatic. To achieve the desired degree of processing and High Quality The disc is selected according to its grain size. The size of the abrasive determines how quickly and efficiently the unevenness on the wooden surface will be removed.

The sanded coating at different stages of processing may remain slightly rough or be perfectly smooth without the slightest flaws or snags. The final result can be achieved by sequentially moving from abrasive discs with a coarse-grained fraction to segments for finer processing. Therefore, you will need several discs for a grinder for sanding wood, which will be changed in stages.

To use the petal attachment, certain skills are required, which means that training before performing important work will be simply necessary.

• Wheels for soft grinding. The universal attachment for grinders for sanding wood appeared on the market relatively recently and is distinguished by its special design and high functionality. Rough work are designed to produce replaceable discs with the desired grain size, which are attached to the sticky base of the nozzle. In this regard, the abrasive tool received the corresponding name - a sticky disc.

The main advantage of a grinder wheel for grinding wood is the quick replacement of a worn-out replacement disk: the entire procedure takes place without removing the main attachment, which is secured with a nut. First, you need to purchase a sticky attachment for grinding on an angle grinder, so that later you can replace the worn-out abrasive segment without any difficulties.

How to choose grinding attachments for an angle machine

Circles should be selected according to the main parameters:

• outer diameter (larger sizes speed up the processing process and increase service life);
• bore diameter (installation of the circle bigger size to a smaller one is possible using a special adapter);
• thickness (the greater the thickness, the longer the segment will last);
• grain size (the fraction must correspond to the type of processing: coarse abrasive for rough work, and fine - for soft processing and creating a finishing coating);
• segment type (special attachments are suitable for processing wooden surfaces).

Reference! The shaft diameter in modern angle grinders for wood is 22.2 mm.

What you need to know when working with an angle grinder

Update flooring(parquet), furniture or facade of the house where there are wooden structures or individual elements, is performed using a grinder for grinding, which is equipped with different attachments. Therefore, it is not surprising that an angle grinder for polishing wood is a popular power tool among professionals and at home. But in order to choose the right tool for the job, you need to carefully examine the wooden surface for the presence of fungus, cracks and irregularities. A video is provided to help beginners who want to know “How to properly sand wood with a grinder.”

A grinding attachment must be selected for each angle grinder model; only in this case will safe performance of work and high-quality surface treatment be guaranteed. Before you start working with a grinder (sanding wood), you need to make sure that the disc is properly secured. You need to move the angle machine smoothly over the surface and avoid vibration of the tool.

When working with an angle grinder for grinding wood, it is unacceptable to use discs of small thickness (high rotation speed and load lead to the wheel breaking, which can lead to injury).

Cost of wheels for woodworking

The price of a tool for polishing a wooden surface is not high, but it depends on the material, diameter and thickness. The table shows the average cost of abrasive tools in large cities of Russia:

Name of cities	Price of wood attachments, rubles per unit
		Abrasive discs for soft sanding	Roughing (cleaning) wheels	End	Cord brushes
Moscow	from 70 to 900	from 35 to 14900	from 86 to 270	from 33 to 430	from 36 to 5400
Saint Petersburg	from 95 to 800	from 35 to 14900	from 86 to 270	from 33 to 430	from 36 to 5400
Chelyabinsk	from 262 to 820	from 35 to 14900	from 86 to 270	from 33 to 430	from 36 to 5400
Novosibirsk	from 100 to 760	from 35 to 9000	from 86 to 270	from 33 to 430	from 36 to 5400
Kaliningrad	from 57 to 660	from 35 to 9000	from 86 to 270	from 33 to 430	from 36 to 5400

Handmade requires application quality instrument, and an angle grinder with attachments greatly facilitates work and speeds up the process of processing a wooden surface.

Belt sander

Many of us have encountered repair work in the garden, at home, in the garage, when it was necessary to sand the wood to update the facade garden house, sand the wooden floors and walls. Let's take a closer look, How can you sand wood?

There are several tools you can use to do this:
-Bulgarian
-drill
-surface grinder
-belt sander
-manually

Bulgarian(angle grinder). If you own this tool, you will need flap wheels for grinding.

Come in different diameters

They are made from pieces of sandpaper attached to a rigid base.
Wheels come in a variety of grain sizes, from fine to very coarse. If you want to rip off old paint, take a circle with coarse grain (No. 40). To remove a small layer of wood, you will need #60 or #80 grit (considered medium). To give the wood a smooth finish, you will need a fine-grit sanding wheel (No. 120).
The diameter of the circle can also be different, from a small 115mm to 180mm for a medium angle grinder. It is very convenient to sand logs in this way.

Drill. There are also special grinding wheels for it, which have a pin in the center for clamping into the chuck. There are no larger diameters of circles for drills (up to 125mm). The circles have different grain sizes.
There are several types of circles for drills: with Velcro (hard), for them there are special circles made of sandpaper with a sticky base, very easy and quick to take off and put on (suitable for drills and grinders). On rubber base(flexible - only for a drill), allowing you to cut a piece of any sandpaper that is clamped onto a screw, this method is cheaper than buying factory ones with Velcro. And a flexible disk sometimes allows you to get into hard-to-reach places.

Discs for sanding wood. Hard, rubbery, petal-like.

This method is not suitable for large volumes of work due to the small size of the wheels, and grinding with a drill is not very convenient.

Surface grinder.

Surface grinder

The principle of its operation is as follows: sandpaper is attached to the base, when turned on, the base begins to move very quickly back and forth, thereby sanding the surface. You can cut any piece of skin, any grain size, you don’t have to buy a ready-made factory one. Noticeably more productive than a drill, but it will take you a long time to grind very large surfaces.

Manually. If you do not have a special tool, then it is quite possible to sand the wood by hand. All you need is a sanding block,

Sanding block

Sandpaper is attached to the bottom of it, then you can start working. Performance is up to you, although a power tool will be noticeably faster. But if the amount of work is small, then why not, you can do it manually. For example, you can peel off old paint from a window or door, or you can remove rust from metal.

Even if you purchase and install the necessary additional accessories on the angle grinder, this still does not mean anything. Treatment different materials requires certain knowledge. Without this, it will be difficult to achieve the desired quality.

This question can be confusing, because this is exactly what an angle grinder is - an angle grinder. But it is very universal and must be prepared for each operation. To prepare the grinder for grinding, you need to purchase a support wheel that is installed directly on the machine shaft.

To process wood, you need to stick an emery pad on this circle. The number of sandpaper is selected for the immediate moment of work. On sale you can find both a grinding wheel of the required diameter and sanding wheels of the appropriate size. Sanding wheels with Velcro are also available for sale, which are very easy and quick to change on the tool.

To convert our grinder for grinding concrete, it will be good decision purchase a special protective boot. It is good because it has a connection for connecting a vacuum cleaner. Well-known housings are produced by Hilti. The casing from this company has a sliding sector that opens part of the wheel for grinding in the corners.

Grinding metals with a grinder is usually performed with standard metal grinding wheels. They have different diameters, different thicknesses and different grains of the grinding surface. But, if you are going to sand an indecently rusted surface, then first you need to go over it with a metal brush. Such brushes required diameters also on sale.

https://youtu.be/vDs1gBM_MW4

How to grind with a grinder

We must not forget that sanding always involves a lot of dust. When preparing for sanding, don't forget about yourself! A protective mask and respirator are the best assistants when grinding. You can also find an option where the mask is combined with a good respirator.

The respirator filter will clog very quickly, so you need to prepare several pieces at once for prompt replacement. Only after thorough preparatory work can you begin sanding.

Sanding wood + (Video)

Wood is a unique material. It can be sanded quite well by hand, but with a grinder you can achieve very good results. Some snobs claim that you can’t grind with a grinder at all, but this is due to ignorance and inability.

The main secret is that the grinder is used at minimum speed. If the grinder has a speed switch, then there will be no problems. At high speeds, the sandpaper will become clogged with wood very quickly and very tightly. In this mode, it will not be enough for even five minutes of work. The optimal speed is no more than 6000 rpm.

Another secret is not to sand the entire area of ​​the wheel. If you sand the entire surface, circular marks will remain on the wood. To ensure that there are no sandpaper marks left at all or that they are minimal, you need to sand only with the upper sector of the wheel. The movements of the machine should be along the grain of the wood.

Using this method you can get excellent results when sanding lining. The board becomes smooth and does not retain tool marks. Just don’t get carried away and change the sanding pads on the wheel in time.

The frame is polished in a similar way. Here it is desirable that the support plate is thin around the edge. With such a plate it will be easier to sand narrow places junctions of logs. Otherwise, this work will have to be completed with a chisel.

We work on concrete + (Video)

If you were unable to purchase a branded protective boot with a nozzle for a vacuum cleaner, then you can make it yourself. To do this, take a used putty or glue bucket with a diameter slightly larger than the circle of the grinder. We cut off the bottom part at a height slightly higher than the assembled sanding part.

We cut a hole in the bottom for installation on the gearbox and a hole for the plastic plumbing corner outlet. Now we connect the vacuum cleaner hose to the nozzle and work quietly.

The grinding wheel must be designed for stone processing. Concrete and concrete surfaces It is preferable to grind the entire surface of the wheel. This will save processing time and level the surface well.

When grinding a concrete floor, you must constantly control the plane using a construction ruler, because due to the different densities of concrete, indentations can be made. For processing joining seams between concrete pours It will be enough to achieve one combination in level.

It is good to grind concrete floors and surfaces with a Matrix diamond grinding cup. If the grinder is 150 mm, then the cup is 125 mm.

Grinding metal surfaces + (Video)

The metal is polished according to different requirements. Most often, the metal is ground for painting or for further polishing. The main tool is a support cup with replaceable sanding pads. The selection of sandpaper depends on the degree of processing and the condition of the metal.

When sanding, you only need to work with part of the disc. There should be no untreated areas left on the surface.

It is advisable to coat the treated surfaces of ordinary steel with a primer. Moisture in the air can very quickly coat the metal and cause rust.

HOW TO GRIND WOOD CORRECTLY

After completing the part, its surface must be thoroughly sanded.

The trade also offers wax, which needs to be diluted with water. When diluting the wax, try to achieve the shade you need so that you don’t have to redo the job later. The finished wax is applied in a very thin and even layer.

But no matter what type of wax you use, the wood must be left to dry after coating for at least an hour so that the wax is absorbed. Then the excess should be removed, otherwise it will resemble greasy spots. After this treatment, the surface will become matte.

If you want to achieve shine, apply wax a second time. Since the pores of the wood were filled with wax even when applying the first layer, only a small amount of it will now be absorbed. A film will remain on the surface. This layer is not wiped, but treated with a coil of thin steel wire (000 or 0000) or cloth - just as shoes are polished after applying cream. If the surface becomes too shiny, take a new roll of wire or turn the felt over to remove excess wax.

WAX FROM TURPENESS AND BEESWAX

Although today furniture wax You can buy it without any problems; some home craftsmen prefer to use their own solution. Especially when it is required a large number of. In this case, making your own mixture may be more beneficial in financially than buying ready-made.

To prepare a composition for coating furniture, you will need beeswax and turpentine as a solvent. Beeswax It comes in various shades of color - from straw yellow to very rich orange. If you have to process light wood, the color of which you would like to preserve after applying wax, you can use bleached wax to prepare a homemade mixture.

The wax mixture gives a stronger, more durable finish if you add a little carnauba wax, a fairly hard tree resin.

WATER BATH

To prepare the mixture, take the prepared wax and chop it with a knife or chisel. Then place in a jar with the same amount of turpentine and heat in a water bath over low heat. Once the wax is completely melted, remove the pan from the stove. Add wax to the hot mixture a little at a time until you get a thick paste. Stir it well with a wooden stick.

Only after complete cooling can you judge the consistency of the mixture. If the furniture wax you prepared seems too thick or thin, add - again in a water bath - a little turpentine or crushed wax. Whenever handling a hot mixture, turn off the stove, otherwise the turpentine may ignite. Store furniture wax in a tightly closed container.

PROTECTIVE COVERING

It is not customary to hide the veneer surface under a layer of opaque varnish. To show the structure of the wood, transparent coatings are used. The matte finish enhances the natural color of the wood and protects it.

Unprotected wood, such as the surface of furniture, soon becomes covered with water stains, scratches or traces of dirt. Therefore, it is advisable to apply it to everyday furniture. protective covering, from which dirt can be easily removed.

A matte coating forms on the surface of the wood protective layer, which is much harder and more durable than wax. A matte finish is less noticeable on wood than polish or clear varnish. However, if you apply too thick a layer of matte coating, you can get an unpleasant “greasy” sheen.

The matte coating penetrates the upper pores of the wood and changes the reflectivity of the surface. Its color becomes more intense and warm. When a matte finish is applied to untreated wood, experts say it begins to shine. With this processing method, the natural color of wood becomes more saturated.

COATING MATERIAL

1. Primer.

2. Matte finish.

3. Solvent.

TOOL

1. Grinding device.

3. Damp cloth.

5. Sandpaper with a block.

6. Wool fabric.

7. Old newspapers.

8. Brush or broom.

9. Tampons made of cotton wool, thin linen or cotton fabric.

10. Fine lattice brush.

SHELLAC AND CELLULOSE

There are two types of matte finish. One of them is shellac, the most important component of which is obtained from the secretion secreted by scale insects. It is cleaned, bleached and shaped into leaves. The matte finish obtained from shellac has a light yellow color. If they want to make very light wood matte, leaving the color unchanged, use bleached shellac (but only specialists can do this).

Another type of matte finish is cellulose. Today it is used much more widely than traditional shellac. Cellulose forms a strong layer and is more durable than shellac, making it primarily suitable for everyday furniture.

JUST DISSOLVE

Previously, carpenters and restorers themselves prepared compositions for matte surface coating. Today they are increasingly used ready-made compositions, which are diluted immediately before use.

The matte coating is applied with a swab. Unlike a brush, it fills the wood pores deeper with liquid. This creates a soft shine. The coating is applied thin layers repeatedly.

HOW TO STRENGTHEN YOUR PROTECTION

If you want to better protect the wood and increase shine at the same time, apply a second coat after the first coat has dried. If this is not enough, coat the surface a third time.

The cellulose coating can also be applied by brush. Since a large brush absorbs a volume of liquid approximately equal to a tennis ball, the surface finished in this way may appear streaky. Each new brush stroke is clearly visible. In such cases, the surface should be treated with a coil of thin steel wire.

STAIN PRE-TREATMENT

A tightly packed tampon absorbs liquid slowly. Therefore, it takes longer to wet it.

DOSED PRESSURE

A swab well soaked in liquid, from which the solution should not drip, is transferred to the surface of the wood. Too much pressure is just as harmful as too little pressure. Do not apply a large amount of matte coating, it is better to apply another layer after drying.

You only need to move the swab in the direction of the wood grain, stroke by stroke. Apply the matte coating evenly over the entire surface so that after the first layer has dried, a uniform matte sheen is visible on the wood.

The thinner the matte finish, the easier it is to work and the less shellac is applied to the wood. The solvent gives a slight shine after each swab on the wood.

The solvent evaporates and the wood becomes dull again. Therefore, you need to evaluate the resulting coating not immediately, but after it has dried. Only then can you see whether one layer is enough or whether a second or even a third layer needs to be applied.

If the matte finish appears streaky (the shine intensity is uneven), this can be corrected by treating it with a roll of fine steel wire (000 or 0000).

All photos from the article

Sanding wood at home is not as difficult a task as it might seem at first glance. Wood is a soft material, and even an amateur can handle this task with basic skills. The main thing here is to properly prepare the surface, choose an abrasive material and strictly follow basic technology.

We will analyze all this in order in this article.

Why is this necessary?

First, let's define what is generally meant by the concept of wood sanding. In the dry language of definitions, grinding is the final or finishing stage of surface treatment, before applying paints and other similar compounds to it.

Professionals assure that sanding of wooden surfaces must be carried out. Without this operation, the quality of application of primer, varnish or paint will be much lower, they will be absorbed worse. Since such processing opens the pores of the material, it eliminates minor irregularities and lifts fine fibers.

When professionally applying water-dispersed and some other types of varnish, intermediate sanding of wooden products is a mandatory part of the technology. It is performed immediately after opening the first layer of coloring composition and is designed to raise the pile and identify minor defects.

But these are all rather technical reasons. In the manufacture of furniture, decorative items and finishing works in construction, plays an equally important role appearance surfaces. After all, paint and varnish products have the ability to reveal any irregularities and scratches, as a result, it is almost impossible to do without sanding.

How and with what wood is processed

All work of this kind can be divided into two directions: these are exclusively manual, where abrasive and working hands are used, and mechanical, in which electric tool for sanding wood manually. Professional stationary machines in this case are not considered, since not every home workshop has them.

Important: before performing work, the surface must be well moistened. The instructions are simple, take it warm, and for some varieties even hot water and the surface is actively wetted. Then it is left until completely dry.

The purpose is to raise the pile, as well as identify defects and cracks.

Manual processing

• Before moving directly to grinding, we decided to mention one more method finishing called looping. For some surfaces, only this is sufficient. The idea is simple: take a rectangular metal plate, sharpened on one side (scrape) and clean off the irregularities with your own hands.

• The most common abrasive for wood is sandpaper or sandpaper.. There are three types of material: glass-coated sandpaper, corundum sandpaper and silicon sandpaper. For amateur use there is not much difference between them.
• Here it is much more important to choose the right grit number; it is classified from coarse to fine. On initial stage more rough processing is carried out. For wood, as a rule, sandpaper No. 80 is used. Then, as the quality improves, they gradually move on to skins with fine grain size No. 120 - 240.

Important: the market offers abrasive applied to paper or fabric. There is no fundamental difference in the quality of processing. But sandpaper wears out much faster, plus sandpaper with a fabric base is much more convenient to work on difficult surfaces.

• First of all, it should be clearly understood that sanding on wood is performed exclusively along the grain. If you try to work crosswise, even with fine processing, scratches will remain.
• The only time cross or diagonal processing is allowed is if you are dealing with a mixed furniture board and work with fine sandpaper attached to.
• It is very inconvenient to work with sandpaper while holding the skin with your own hands.. Therefore, when hand sanding is performed wooden walls or other large flat surfaces, a special plastic block is often used, it is shown in the photo. On both sides there are special clips designed to secure the emery.
• Although the price of a grinding block is a pittance, when performing one-time work, not everyone is willing to go to the market specifically for it. In this case, you can use . The block is selected by hand, then the emery is pulled over it and secured with nails.

• For processing carved decorative surfaces with complex terrain, use another tool. It is convenient to process rounded and spherical products with so-called sanding sponges. Visually, they resemble the well-known dishwashing sponge, only an abrasive coating with varying degrees of hardness is applied on top. Plus, instead of foam rubber, a more elastic and durable polymer is used.

• Some craftsmen make their own grinding files for grinding small threads.. Simply put, they glue strips of emery onto wooden sticks different thicknesses and configurations.

Electric tools and attachments

Large and complex jobs such as sanding wooden houses, final leveling flooring or processing furniture and decorative items is difficult to do with your own hands. Therefore, here the life of the craftsmen is made easier by special attachments and devices.