Personal articles we devoted screwdrivers, grinders, chain saws, jigsaws, mixers, kraskopultures, tracing, hovering hammers, perforators. Today, all our attention will be riveted to the instrument that manual emery.
Collect or form a wooden part, remove the paintwork, remove rust, run the burrs, sweep the shp can, process plastic, polish the stone - all this and much more under the power of modern grinding machines. So, we offer the slogan: "Choose the grinders with us, choose as we choose the best of us!"
Grinding: This process for many causes unpleasant sensations, even at one mention of it. What can be said here, grinding is a monotonous operation, time-consuming, painstaking, dusty, sometimes noisy, slightly harmful, but, unfortunately, inevitable. Modern requirements for finishing work reached unprecedented heights, no one questioned the fact that the planes should be perfectly smooth and smooth. Finishing high-tech coatings are increasingly striving for thin layerness and only emphasize the flaws of the foundation. Even enlarged, with a finished decorative coating, leafy building materials have to be connected, after which the sealing / putty or sealing of the seam follows with the subsequent grinding. Domestic builders finishing and shops (furniture manufacturers, "carpets", stone products, polymers, metal) slowly but are correctly used to new standards, unknown earlier.
Fortunately, the matchpies lagged behind: to cope with the task of working people helps a highly specialized, relatively inexpensive tool - grinding machines, without which we can no longer do. In the past, the familiar emery was left before the pain, fixed on a wooden bar, or clamped in his hands. Painting capitalist production issued a lot on-mountain, a lot of remarkable professional furnaces for grinding, designed for any occasions, without having adopted the attention and homemade masters - lovers to create something their own hands. Understand the variety of grinders and make the right choice is actually easy, the main thing is to know what a specific tool is intended for, and it is clear to understand what tasks you will put before grinding.
It is customary to distinguish between the three main types of grinding machines: tape, eccentric (orbital), flat octiculipal (vibratory). All of them have their own specialization and form a kind of cascade of opportunities, directed from fast coarse processing to delicate finish grinding. Many of those who "debt service" are tightly associated with grinding, have a full set of tool in their arsenal. Ribbon grinders are heavy artillery for removing large layers with extensive planes. PSM is focused on finishing processing. And ESM is able to give an even more qualitative result, bordering the polishing, but, compared with vibration machines, they have another principle of operation and other filling.
Ribbon grinding machines
Above, we have carelessly called the ribbon grinding of heavy artillery, actually it would be more appropriate to say "tank". The working element of this well recognizable tool is an abrasive tape glued in the form of an infinite ring, which moves along two end rollers and clearly resembles a tracked machine. Such aggregates are relatively powerful, they have a relatively simple reliable design (angular gearbox plus a clinorem transmission), a low center of gravity, a solid speed of the abrasive material. With the help of a ribbon grinding machine, it is easy to remove the material layer of several millimeters, to make the edge or rounding on the workpiece, remove the old paint and varnish or rust. It is subject to wood: wood, metal, polymers, mineral building materials ... Clear floors from paint - Yes, it is possible to correct the planed timber - please align the shtached wall with a marriage - no problem. However, it is worth understanding that high performance is not the best quality of quality, there will definitely be scratches and sinks. For finishing grinding it will be necessary to apply an orbital or plane-flame machine.
It is no secret that the capacity of the electric tool is directly effectively affected by the power consumption of its motor - the higher it is, the more we can squeeze out of a particular unit. In the case of LSHM, the consumer has the ability to choose from models with a 0.5 to 1.2 kW engine (Skil Masters 7660ma - 1200 W).
Please note that the Chinese trademark tool is often declared with high engine power parameters, or if there are voiced watts there, they are not balanced with the other characteristics of the apparatus. The record capacity is poured by those manufacturers who have nothing to do, except except for greater weight and bulkness of the "unique" product.
The following is an important characteristic for the ribbon grinding machine - this is speed. Obviously, it also needs to be taken into account, to determine the capabilities of the tool. A quick machine will make more, but it will not be able to give it if an outstanding speed is not supported by an additional power. All of the fault, the notorious torque, which says that the greater the speed of the tool, the less time he remains. The responsible manufacturer carefully balancing these characteristics, makes them mutually changeable, for which the smart electronics sometimes meets. The speed of the ribbon in these grinders can be located within 150-550 meters per minute (Fiolent MShl1-100 - 550 m / min.).
Maybe there may be a question, why do you even produce nimble, but relatively low-power LSHM? Just super-rotating (fast and at the same time strong) the car is harder to manage, it is harder, larger, more expensive. She, with overpressure, is easy to spoil the workpiece. In turn, maneuverable high-speed lights are convenient in a short time, often "in place", treat the surface of a large area. If you do not know, what loads are expected to be embedded - choose a slower model, to which you can press a little, so it will be more universal. The LSHM is still multifaceted with the possibility of high-speed presets (Sparky MBS 976, Dewalt DW433). Among them are options with smooth or stepped adjustments.
It's time to say about electronic systems that help with ribbon grinders. These machines are affected by electronic filling, compared with other types of electrical instruments. Everything is usually limited to adjusting the speed of the tape. The switch responsible for this function is performed in the form of a slider or wheels with fission. There are models with overheating protection (Metabo Bae 75). With some stretch, here you can attribute the function of fixing the start button in the on position.
There is much more interesting things with mechanical "addicts". The set can go stand or special clamps intended for stationary tool fastening (very convenient for handling small parts). The grinding frame serves as a kind of limiter, which helps to avoid damage to the workpiece. Parallel or angular emphasis is useful for the preparation of an accurate bevel or an even parallel surface. The thin front roller in some LSHM (Black & Decker KA88) has a small diameter, which allows to a minimum to reduce the dead zone in the inner angles. Automatic tape centering (the tricky barrel shape of one of the rollers) does not allow the last treacherously to crawl into the most inopportune moment. An additional handle with a changeable tilt or removable will significantly increase the functionality of the machine in the "clamped" places - sometimes noticeable.
Separate attention is worth paying the size of the working plane - soles, respectively, the length and width of the tape. Wide soles (100 mm) are characteristic of powerful professional models, so that they become more stable and productive. The class "Hobby" is usually limited to 75 millimeters. A long and wide sole of expensive LSHM has a complex design consisting of a substrate and an elastic plate, which allows you to have a permanent uniform contact of the emery with the part, such a tool is good "holding a plane." It is necessary to mention the "ribbons" with a narrow snap - these are the so-called "electric poles", which do not differ in high power and versatility, but the specialists value them for non-essential compactness (for example, Makita 9032 with a ribbon of a width of only 9 mm).
The system of dusting is in all ribbon devices, but not in all it works equally efficiently. The fight against dust is carried out either using a vacuum cleaner connected through the nozzle, or a collection of its bag, a built-in filter. Of course, the vacuum cleaner is preferable, especially when grinding mineral bases. In the superdigal models of the impeller responsible for air absorption, it does not cope with its function, the channels are quickly clogged, there remains many harmful "flour" in the air.
FlatShelipoval (vibratory) machines
If we take into account the purity of the processing of parts, then the plane oarsal devices occupy an intermediate position between tape and orbital. With their help, the finishing grinding of flat surfaces, made of a wide variety of materials - plastic, wood, stone, metal ... Thanks to a relatively large working plane, PSHM is suitable for working with a serious quadrature. The secret of the popularity of vibration grinders lies in their moderate value, the availability of equipment elements, as well as in the absence of dead processing zones (flat outcodes easily processes the angles).
The main working body of the plane grinding machine is a stove, which with a small amplitude makes frequent reciprocating movements. The motor in such machines is located vertically, which makes it possible with the use of tandem "Eccentric-counterweight" rotational movements of the shaft translate into progressive movements of the platform.
Most vibration grinders can traditionally boast a power motor within 150-300 W, they are pretty maneuverable, to measure are light and compact. There is almost always enough such a power plant. However, such disposal of manufacturers would have at least strange - there are models with a capacity of up to 600 W (Makita 9046). They are, of course, harder and larger, but can work for a long time without overheating at low speeds.
The most important indicator of PSM is the amplitude of the stroke of the sole. In different models, it can be varied, although it is consistently a relatively low value. On average, the class platform makes moving by 1-3 mm, in more movable models there may be 5-6 mm numbers (Festool RS 100). A large amplitude helps to pass the surface faster, but such treatment at the same time will be more coarse.
Another nuance is the frequency of the sole. At high speed, the machine quickly removes a relatively thicker layer, and at a lower frequency it is easier to achieve accurate finishing grinding. Some manufacturers make the frequency of movement of the platform variable, exceeding the mark of 20,000 strokes per minute (Bosch GSS 280 AE L-BOXX), which allows you to adjust the processing of various types of materials, under particular specific surfaces.
When choosing a vibration grinder, a separate attention must be paid to the platform. With its size, everything is quite simple, there are two options: a kind of "standard" and the "mini" model - plate area of \u200b\u200babout 100 mm 2 (Makita Bo4557, Sparky MP 250). Kids are well suited for narrow, sheds. Obviously, the sole must be high-quality, perfectly flat, with chinful geometric shapes. Budgetary machines are equipped with a platform from steel or high-strength plastic, and more expensive analogs - licensed platforms from alloys with aluminum or magnesium content (Festool RS 100). A good sole is characterized by accurate balancing, which is easily determined by a low degree of vibration when working without load (idle). It is important, from which the pad is made, the most suitable option is a porous polymer, it is better than rubber, "holds" the plane.
In a separate class, vibratory grinding devices with a deltoid platform are isolated, they are called "Iron" (Hitachi Sv12sh, Makita Bo4565). Due to miniature sizes and good "passability", they are used to process objects with small parts and complex surfaces, such as furniture, carpentry, elements of stairs, car body. Their triangular platforms are swivel - it can be continued to work unevenly "eaten" emery petal (Festool Deltex DX 93E) or removable (with a quick installation of another type of platform - for concave / convex surfaces, for structuring, polishing, logging).
Entreb can be attached differently to the site. It is more convenient when the paper is fixed on velcro, but a special snap is relatively expensive. An option with spring-loaded clamps is somewhat more complicated, but you can use inexpensive grinding paper, sliced \u200b\u200bpersonally (it is only in the right places to do the holes for the dusting).
The fight against small dust, which inevitably forms when the sandmashina is working, sets many tasks in front of the developers. They have to work hard on the protection of all mechanisms. In this case, a special sealing of the motor, protected bearings and switches, a impermeable case, a system of channels with forced dustproof are applied. In order for the dust to be removed from the working area and did not sat down air, it is sent to a collection of a collection or filter, in most cases the vacuum cleaner can be connected to the nozzle - this is the most effective protection method.
Eccentric (orbital) grinding machines
This type of grinders is designed for high quality processing. Delicate grinding and even polishing are their elements, although the performance of such devices may be no less impressive than in vibration machines. They will cope with any material, most often ESHM you will meet masters from the wooden works, car painters. In working with profile, voluminous, curvilinear objects, eccentric grinders there are no equal, they also do not occur with the planes too. The only one, where such a machine will save, it is in the corners and small deepening - "Plate" just will not get there.
As well as the plane octic units, "orbitals" have eccentric and counterweights, with the help of which the round grinding plate performs not only the movement around its axis, but also by orbit with a small amplitude. Interestingly, the axial movement is usually due to inertia, and in some models, it is forced (through a gear gear - Kress 900 MPS). Such a complex movement of the working canvas, with the highest speed of rotation, just allows you to obtain the surface of excellent quality, without recesses, waves and scratches.
From 200 to 900 watts - so much consume motors of modern ESM. Those that more powerful, naturally, and more productive, they with ease pull the sole of more larger, to 150 mm in diameter (for example, 400-watt Bosch Gex 125-150 AVE or intercol ESM-150 / 600E).
Bosch Gex 125-150 AVE
By speed of translational movement, orbital machines also have differences. If we talk about rotation, this indicator can be from 4 to 14 thousand eccentric revolutions per minute for adjustment models (Metabo SXE 425), and about 12,000 for models without such. If we talk about the concept of "oscillation" - then these numbers will be twice as smaller. In fact, everything is simple, the higher the speed, the rougher there will be processing, but the faster you can perform work.
Eccentric orbital machines may not have the same "scope" - from 2 to 7 mm (Festool WTS 150/7 E-PLUS). This is called the amplitude of oscillation. What it is less, the less the vibration generates the device, the more compact the plate, the smaller the square we proceed, but the cleaner will be cleaned. In some ESM, the operator can set a certain amplitude, affecting the performance and thinness of grinding.
Compared to its fellow (LSHM and PSHM), "orbitals" is usually well-stigned by electronics. We have already talked about the installation of speed and amplitude, in addition to this, the professional tool is supplied with automatic frequency maintenance system (Bosch Gex 150 Turbo) so that it does not fall under load - it is a constant electronics. In some models there is an electrodynamic brake (AEG EX150ED K), which, after disconnecting the "Start" button, stops the work plate instantly, preventing the workpiece and reducing the possibility of injuries. For powerful professional machines, launcher limiter may be provided (Makita BO6040 ), Which smoothly accelerates the instrument, preventing the starting jerk and protecting the network from short-term, but increased by many times.
To very pleasant options, we will draw a removable network cable, adjustable or removable front handle, fixing the launcher, functional dust removal.
Be sure to pay attention to the type of grinding sole. First, if you need particularly delicate processing, do not chase behind a large plate, it is, by the way, the dead zone is greater, and the amplitude of about 5-7 mm. The stove made of metal has stability, high strength and perfectly removes heat. The elastic plate coocts well with convex surfaces. All of them have velcro to fix the eatte and holes for dust suction. These holes in individual manufacturers can be different in size, quantity and location, on this feature you need to pick up a suitable snap.
If a financial question is not the last value, then for the home workshop, you can purchase a model from the "Hobby" category. Not bad instances offer Makita, Black & Decker, Skil, Sparky, Bosch. Look in the direction of the domestic producer - "Interskol", "Fiolent" noticeably tightened in terms of quality and functionality of their instrument.
Pay attention to the mass and dimensions of the product of the article, especially if a lot of work is planned "at the place", on weight, on the elongated hands. Prefer not too powerful machine, and more speed, it will be easier, more compact and cheaper. But for regular execution of operations on the workbench, the large weight of the device will be more advantageous than a minus.
Be sure to "swell" the grinders, find the most suitable for ergonomics. Decide with the type of main and additional handle, most likely you will have to choose between "mushroom" and "bracket." Look, whether the switches are conveniently located, and how they work, how easily the snap is changed, whether the network cord does not interfere.
Check the moving parts of the product for the presence of hopes. Look at the accuracy of fitting the body parts. Turn on the machine in the store tool, at least at idle the noise level and vibration. Ask the cost, assortment and the possibility of interchangeability of consumables.
Weigh all the "For" and "Against", do not hurry with the choice, then all the repair will go smoothly.
Grinding is one of the types of bodywork. Given the large surface area of \u200b\u200bthe body, perform them manually ineffectively, therefore, labor automation is required. This article discusses how to choose a grinding machine.
Two classes of grinders
The choice of the device under consideration should be founded primarily on its purpose. That is, you need to decide why the machine needs and which is better suitable. At the same time, they take into account what work is planned to be carried out with its use and how much to use it. Based on these parameters, choose between professional and household models.
Profinstrument
The main difference between the named types is that the first grinders are designed for prolonged, continuous operation in difficult conditions. Their high reliability and endurance are due to the fact that in the production of such models, high-quality materials are used. In addition, they are characterized by high power. This causes a large mass and a high cost of such tools. Parts for the grinding machine of professional type include rollers, abrasive ribbons and nozzles, bushings, running parts and other elements.
Household devices
The main advantage of such options is the cost. Although among them there are quite high-performance devices, their possibilities are still inferior to the characteristics of professional analogues. However, for the needs of ordinary users of this should be enough. For rare work, it is not advisable to purchase an expensive and complex device. However, it must be borne in mind that such grinders are capable of functioning about 20 minutes, after which a break of the same duration is required. Moreover, to perform one-time work, you can take a rental tool.
What to take into account when choosing?
The choice of the design of the tool is carried out on the basis of the features of the work. At the same time take into account the type of material and surface. The most simple in the processing is a flat surface. Before choosing, you should see reviews, video reviews, manufacturers rating and models rating. They can tell a lot about specific tool models. Moreover, it is useful as a rating of quality and popularity.
It is also necessary to take into account not only how much the tool itself is, but also the cost of components and spare parts for grinding machines. The price of the content includes abrasive elements, such as a peel for the grinding machine. Such equipment uses a flat machine, for other options requires discs, brushes.
Classification
There are several types of grinding machines allocated based on the design.
Corner
The grinders of this design are most extensive. They are called grinders. The popularity of such models is explained by the fact that these grinding machines are universal. They are suitable not only for polishing and grinding surfaces from various materials, but also cutting and metal processing and stone.
When choosing such tools, you need to navigate, first of all, to the power and diameter of the disk. Simple embodiments have a power of 600 - 1000 W, providing speed of rotation up to 6000 rpm. They can perform grinding, polishing and cutting on a small depth. For such works as cutting stone, it will take the grinders with a capacity of about 2000 W at the same speed of the disk rotation.
The diameter of the circle is also important, but manufacturers produce devices under the standard dimensions of abrasive elements, which simplifies the choice. They range from 115 to 230 mm. There are also two variants of the diameter of the planting holes: 22 and 32 mm.
In addition, you should choose a grinding machine with revolutions, since devices that do not have this device are capable of carrying out all types of grinding, but are suitable for cutting various solid materials.
Straight
Such tools are used to carry out minor work requiring high accuracy. For example, they perform a grinding of small surfaces of surfaces like jumpers and slats, as well as edges and angles. In addition, using specialized nozzles, which are equipped with most of the grinding machines of the type under consideration, you can cut various materials of a small thickness and apply engraving.
Many straight grinders are characterized by a small mass and are designed to hold one hand. Another important constructive feature of the tools of this type is the location of the spindle parallel to the case.
Tape
The main purpose of such tools is the primary processing of the surfaces of a large area. So, with their use is carried out coarse grinding, alignment, sprinkling, removal of paint and varnish. Ribbon grinding machines are most in demand by professionals, although there are also household options.
The abrasive working element of the grinding machines of this type is shown glued into the ring with a ribbon from the sandpaper. Most tools are equipped with a ribbon of 4 0 - 120 mm wide, although there are options for a width of less than 40 mm, intended for processing complex surfaces. In any case, the working element rotates on two end rollers. You can learn more about the principle of operation of such tools from the video. Outwardly, they resemble the electric margin.
A large flat working surface of the ribbon type grinders provides the greatest performance. However, the quality of work is low.
The main parameters of such devices are the speed of the tape, the presence of a dust collector and a smooth start system.
Vibration
Such machines are also called flat octic. The flat model serves for the final pre-color surface treatment, as well as the removal of the influx of the paintwork before re-painting. In addition, a flat grinding machine is suitable for processing materials such as wood, metal, stone, plastic, composite materials.
The flat grinding machine functions based on the fact that the flat sole makes the reciprocating movements of high speed and small amplitude. It can be clearly observed how the flat car works in the video.
The main parameters that are characterized by a flat model are the power and amplitude of oscillations.
Eccentric (planetary, orbital)
The grinders of this type are universal, that is, have an extensive scope of application. So, they are used for grinding, cleaning, polishing surfaces from metal, plastics, wood, as well as for thin grinding. In addition, they are suitable for the treatment of curvilinear and convex curved surfaces.
The principle of functioning of eccentric tools is to make the working surface of rotational and oscillatory movements. To see how the circular machine can be functions on many videos. The main parameters of the device under consideration are the amplitude of oscillations and power.
Brush
The name of this type of grinding machines is due to the fact that the abrasive element is represented by a metal brush. There are direct one-handed variants of small size, as well as larger models, similar to belt grinders, with two metal brushed rollers. It is convenient to use them as a grinding machine for glass.
Delta
This equipment is used to handle small parts and hard-to-reach places. According to the principle of functioning, the device data is similar to vibration instruments and differ from them the sole applied forward, similar in shape with the working surface of the iron, and smaller sizes.
Polishing
Such grinders are used mainly to polish metal. In addition, they can function with cutting discs. By design, these devices are very similar to the corner.
Multifunctional
Multifunctional grinding machines are combined in the housing vibration, polishing and delta grinders. They are widely used in repair and finishing work. Multifunctional grinding machines are universal due to the possibility of replacing nozzles.
Rotor
This equipment is used mainly for grinding and polishing the stone. The principle of operation is to rotate the abrasive element around the vertical axis, which can be observed in the video. For various works, the rotary machine can be equipped with different circles.
Facial
Face grinding machines are mainly used for finishing work. This is explained by the fact that the end grinding machines are well suited for grinding and polishing surfaces from materials such as metal, granite, marble. Face grinding machines are designed for holding with two hands.
Typically, the speed of rotation of their working element is 5000 rpm, due to which end grinding machines provide good quality processing.
Separately, you should mention the grinding machines for glass. During production, specialized machines are used. At home, the role of a grinding machine for glass can even perform a drill equipped with special nozzles.
If you need to achieve the most smooth and smooth plane, do not do without. With its help, work if not done by itself, then, in any case, it will require much less time and effort. One thing remains to understand how to choose a grinder from a great set of species.
The main principle is: the design determines the scope of application. Consider various types of grinders, starting with the most popular. We hope that this review will help you understand which grinding machine is better suited for your tasks.
Designed for rough processing of large surfaces or stripping from rust or paint. A distinctive feature is a high level of performance.
Provide good quality processing both with rough and clean grinding. Equipment - Abrasive sheets on velcro or a simple stacker, which is attached on the clips.
From the previous type, the sole form is different - these grinders have a deltoid (iron). Optimally suitable for the tasks of increased complexity: for example, grinding stairs, furniture, plinths.
Used for finishing grinding, including complex and curvilinear surfaces. The speed of work is also impressive.
USM is often used for cutting. However, and with a grinding of Bulgarian will cope with a bang. It can be treated with such materials such as concrete, stone, ceramics or metal. Just do not wait for a very high quality surface.
Tools for professionals
Above lists 5 types of grinders that may be required to a home master. Next, consider more specialized varieties.
Tool for decorative surface treatment. Helps to emphasize the texture of the tree. Also used for stripping surfaces from rust or paint. The name is given to the apparatus - hard brushes made of metal, nylon or polymers.
The main purpose is stripping welds, the removal of burrs and rust. Designed for intensive work.
With their help, solid surfaces of such materials such as concrete, granite, stone. Required dust removal. Some models are mocked grinding.
Top 3 most popular grinders
Choose which grinder from presented is better enough. We made a brief rating of the best models (according to users):
- Makita BO3711 - a plane grinding machine. Recommended for finishing.
- Hammer LSM810 - Ribbon Grinder. Against the background of other models, it is highlighted with its power (810 W).
- Hammer OSM430 - Eccentric grinding. Suitable for working with various materials.
Leading manufacturers
Before choosing a grinding machine, we recommend paying attention to the brand.
This article is intended for all who are engaged in wood processing and want to facilitate the process of its grinding. To do this, the grinding machine on a tree is perfect, which one to choose a model?
There are several types of wood finishing tools in the market: ribbon grinding machines, eccentric, orbital. So, what to choose a grinding machine, what type of device is better suitable for specific purposes?
Before you find an answer to this question, you should figure out how different models are different and compared their functions with our needs.
How to choose a grinding machine on a tree - Tips
Grinding wood is a time-consuming process that can be significantly alleviated using suitable tools. For wood processing, the grinding machines are best suited for ribbon, oscillation or eccentric, as well as deltoid.
The correct choice of the device depends on the type of work performed and on the features of the workpieces: shape, size, grinding of angles and hard-to-reach areas, type of coating, etc.
For individual works, different tools are better suitable, namely:
- the ribbon grinder is better to choose for grinding of large and flat surfaces;
- eccentric grinding makes it convenient to handle convex and concave small wooden surfaces;
- the oscillation model has a similar application, with the possibility of treating angles due to a rectangular sole;
- the deltoid grinding machine is ideal for surface treatment with complex forms inaccessible to most grinding machines, while its sole area is usually recommended for small wooden surfaces.
Ribbon grinding machine on wood - how to choose?
Description and purpose model
If the surface with which we are dealing with large sizes and relatively flat, it is better to choose a ribbon grinding machine. It is intended for processing massive wood, lacquered boards and veneered panels. 
Ribbon grinders are characterized by the highest efficiency, they are most often used in workshops and rarely for homework.
Due to high performance, tape grinding machines can handle large areas in a short period of time with excellent results. The treated surface is smooth and homogeneous. In addition, since ribbon grinding machines are mainly used for linear movement, they are ideal when grinding along wood fibers.
The disadvantage of belt grinding machines is the base of the base that does not allow you to get to hard-to-reach corners. The edge of the tape is not at the same time the edge of the sole, so the surfaces, for example, near the wall, are not available for this instrument. In this case, you will need a deltoid model.
What tape grinding machine to choose?
To choose correctly choose a ribbon grinding machine, you should pay attention to the following parameters:
- The speed of movement of the working part - the higher the speed, the faster and more accurately polls the surface. Depending on the model, the speed may vary from 200 to 420 rpm.
- Tape size - This parameter affects the speed and accuracy of grinding. But be careful! The larger size, the faster grinding occurs, but at the same time its accuracy decreases.
- Power - the higher the power, the better the tool handles a solid and more complex surface, such, for example, as solid deciduous wood (oak). Due to high power, the tool can work longer without overheating.
If we need a ribbon grinding machine on a tree, how to choose power correctly? Ribbon grinding machines with a motor power up to 1000 W are mainly designed for easy operation, and with a motor capacity of more than 1,400 W will work perfectly with short-term, but heavy load.
Review models
Below are models of grinding machines recommended by experts. Each model highlighted distinctive characteristics.
1. Graphite 59G394 grinding machine. The small diameter of the front roller (16 mm) and an additional knob with an adjustable tilt angle make it easy to grind in hard-to-reach places. 
2. Machine Makita 9920 is a powerful and professional ribbon grinder with electronic speed control for optimal performance. Thanks to the automatic side adjustment, the ribbon can be pulled out the surface to the edge itself. 
Purpose of tool
Eccentric grinding machine is the most universal tool intended for grinding convex and concave small wooden surfaces and many other materials.
This model is used in the following cases:
Ideal for grinding wood;
Suitable for grinding metal surfaces;
It also comes in handy for polishing, thanks to the possibility of installing a polishing disk;
Can be used to clean old paintwork coatings. 
Eccentric or orbital wood grinder is especially recommended for processing and renewal of furniture: dressers, tables. Eccentric grinding machines have a plate that performs rotation, and also fluctuates. Due to this, such devices work faster than oscillating grinders. However, this tool has disadvantages, eccentric grinding machines are characterized by a round sole form, which does not allow the corner processing.
The working part diameter is usually 125 or 150 mm. Of course, the larger the working surface, the higher the performance. However, the working surface of the eccentric grinders is less than that of oscillation. It has its pros and cons: the advantage of a smaller sole is that it is easier to work with it in hard-to-reach places, minuses are less productivity on large surfaces.
How to choose an eccentric grinding machine on a tree?
To figure out which orbital grinding machine to choose, you need to analyze the following parameters:
- Eccentricity is a parameter that has a significant effect on the productivity of the tool and means deviations of the movement of the sole from the point of rotation. The higher the value, the more accurate the tool works.
- The diameter of the disk - large diameters allow you to quickly process large surfaces. Small diameters in turn are better suited to work in hard-to-reach places.
- The number of revolutions per unit of time - the greater the number of revolutions, the more accurate the tool (as in the case of an oscillating machine).
Review models
- The Bosch PEX 400AE eccentric grinder provides high-quality grinding, high efficiency and optimal polishing performance. The Paper Assistant feature provides easy straightening of sandpaper. Comes in a suitcase with a set of sandpaper. The built-in suction module transports crushed dust directly into a container that is easily emptied.
- Eccentric grinding machine Bosch 400W Gex 125-150 AVE is designed for professional use. Extremely universal device due to the selection of a grinding disk with a diameter of 150 or 125 mm. Comes in a suitcase with a set of grinding pads
Oscillating grinding machine - advantages and disadvantages
Main characteristics
Oscillating sandmashinka serves to grind flat and smooth surfaces. It is ideal for processing wooden items, such as furniture, countertops and doors.
Unlike the eccentric model, the oscillating grinders are equipped with a rectangular sole, which can be grinding the angles. More powerful are larger models, the sole of which has a rectangular or square shape.
How to choose an oscillating grinding machine?
Before buying, you need to pay attention to:
The number of oscillations - the higher this value, the better the tool works. Usually designated as the number of oscillations per minute.
Sole size - than it is more, the faster the surface will be processed. However, when working with small surfaces it is better to choose an oscillation grinder with a smaller sole, as this will allow you to more accurately process hard-to-reach places.
How to choose deltoid grinders?
Description of the model
The main difference of deltoid grinding machines from oscillation is the sole. In shape, it resembles the letter Delta (hence and the name of this type of tool). This model is ideal for grinding in corners and other places, difficult to access oscillation, eccentric and especially ribbon grinding machines.
Due to the small sole size, they are designed for grinding small surfaces. In addition, for a deltoid model, you can buy a sole in the form of a spatula. Thanks to her, delta-grinding machines will be useful when cleaning old paints and varnishes, especially from chairs.
What to pay attention to, choosing a deltoid grinder?
By choosing a deltoid model, one parameter should be analyzed as the amplitude of oscillations (oscillation) - is usually indicated in millimeters and is from 1 to 2 mm. The higher the value, the more the sole is rejected, with the tool works more efficiently.
Review models
1. Model DEWALT D26430 is designed for professionals. It guarantees high efficiency in grinding and polishing in the corners and edges, in hard-to-reach places and on small surfaces. The design provides smooth maneuvering and accurate grinding for more accurate work. The dust collecting system provides convenient operation.
2. MODEL BOSCH PSM 18 LI is mainly designed for home use. It has a split grinding sole, the DELTA rotary tip, which allows you to optimally use sandpaper. The built-in suction block transports dust directly into a microfilter container, providing a non-free operation. Wireless grinding machine provides almost unlimited work - without inconvenience with too short cables.
How to choose a grinding machine for home - summarize
- Ribbon grinding machine Extremely efficient and very quickly handles large surfaces. For example, this device can quickly remove a very thick layer of paint from wooden surfaces. The design is characterized by a very high rated power. The machine is extremely easy to use and safe.
- Eccentric grinder - This is a good quality device used for grinding flat and rounded surfaces. Such models have the highest accuracy. However, the sole does not reach hard to reach places, such as angles. The machine has a round disk operating in oscillatory and rotating motion at the same time, depending on the pressure. It is also easy to use, but requires a little more attention than oscillation. This tool holds both hands. Due to the combination of two movements of the plate, the model is very effective, fast, productive and, if used skillfully, does not leave visible traces of grinding.
- Oscillating grinding Used for large flat surfaces. If we have never grinding earlier, it is better to start from this device. It smoothes the surface perfectly, while its work depends on the thickness of the emery paper. The car is very easy to use and safe. It does not require special attention.
- Deltaid machine - Little triangular sole makes it easier to work on surfaces inaccessible to large grinding machines. However, the small area of \u200b\u200bthe sole also makes a model ineffective for the processing of large surfaces.