How to choose a grinder? Overview of all types: eccentric, vibration, belt and others

Wood sander – which one to choose? This question sounds quite relevant given the huge range of products of this type offered. Grinding machines have long gained popularity and are widely used by both self-taught home craftsmen and professionals.

It is important to correctly understand your own needs and choose the optimal model of the device, and this article will help you make your choice (see also: tools and equipment for construction)

Factors to consider

If you need to process a wooden surface, then you need to choose the optimal device to do it correctly; you should take into account several important criteria:

For large volumes of work, you will need a sanding cup for wood - its service life exceeds all other options tens of times

Wood brushing machine

Brushing is a method of artificially aging wood, which involves the use of specialized tools and techniques. The brushing technique is based on the mechanical processing of wood with special metal brushes, with the help of which the softest upper fibers of the material are removed.

Thanks to this technique, the hard surface of the wood is exposed, on which the texture of the material and the structure of the growth rings are clearly visible, and a beautiful relief is formed, emphasizing the aesthetic appearance of the finishing material. However, the brushing process does not end there.

To emphasize the relief and make the structure of the wood even more distinct, it is highlighted with a color that gives richness to natural shades.

To do this, the surface treated with a metal brush is unevenly painted, while the depressions formed as a result of the removal of soft fibers are painted in darker shades, and the surface texture is painted in lighter shades. Thanks to this technique, the wood relief becomes as noticeable as possible.

Important! In order for artificially aged wood to acquire maximum resemblance to a material that has aged in a natural environment, experts recommend painting the previously brushed material gray. Without waiting for the paint to dry completely, it is smeared from the relief surface.

The artificial structuring method can be used in the processing of both hard and soft wood. The main requirement that wood to be brushed must meet is the presence of a clearly defined texture and clearly visible layers of varying hardness.

Such materials include oak, pine, walnut, larch, wenge and ash.

As for alder, cherry, birch, teak, maple and beech, the brushing method will be proven to be ineffective for these species, since the distinctive feature of these trees is a fine-fiber structure without pronounced layering.

On a production scale, the amount of work is many times higher, and therefore there is a need to automate the process, which involves the use of special machines.

This helps simplify the work of producing aged wood, and also reduces time costs, allowing large volumes of work to be completed in a short period of time.

If you want to purchase special machines for brushing wood at home, it only makes sense if you plan to do a large amount of work. Let's look at the most common models of stitching machines.

Cleaning router or so-called brushing machine for brushing wood FESTOOL RUSTOFIX RAS 180.

Three brushes are supplied with this device:
1. The first steel wire brush used for primary wood processing;
2. Second synthetic bristle brush for intermediate sanding;
3. The third, made of sisal, is used to polish the treated surface.

The Makita 974 sander can also be used for sanding wood, however, while working with it, difficulties may arise associated with processing corner areas.

In this regard, at the joints between walls and floors, it is necessary to additionally use an angle grinder equipped with attachments.

The Felisatti AGF 110/1010E grinder can be used to process both relatively smooth and uneven surfaces. Metal and nylon brushes are supplied with this device.

It has an analogue - the Interskol sanding machine, which will make sanding wood much easier if you follow the instructions presented in our article.

Random orbital sanders

Eccentric sanders
When processing a wooden surface, the sole of the eccentric sander moves in several directions: back and forth and around its axis. The quality of processing depends on the rotation speed and vibration amplitude. This type of equipment does an excellent job of grinding both smooth surfaces and curved parts. An eccentric sander can be used for fine sanding, polishing and cleaning of wooden parts.

You can use eccentric sanders at home and in professional activities, it all depends on the amplitude of the equipment’s vibrations, the power and the number of revolutions of the grinding surface. The most powerful machines: the vibration amplitude of the processing sole is not less than 7 mm and the power is 750 W, suitable for rough processing and characterized by high productivity.

Eccentric (or orbital) sanders, due to their circular motion path, allow you to achieve a perfectly flat and smooth surface.

Based on the method of attaching sanding sheets, machines are divided into two types: clamping and Velcro models. Machines equipped with a clip are slightly less expensive than similar models with Velcro. This is due to the fact that consumables for this type of equipment are easier to select and cost less. But changing the sanding sheet takes a little longer and is technically more difficult. Machines equipped with Velcro are much easier to use, but consumables are more expensive due to specific fasteners.

Professional and some household models of eccentric sanders are equipped with additional devices for dust removal: vacuum cleaners with dust collectors and a filtration system. Thanks to this, working with equipment becomes safer, since fine dispersed dust is very dangerous for the respiratory system.

Random orbital sanders

An eccentric machine (ECM) operates on the principle of combining vibration and rotation. We can say that vibration and disc grinders are combined in one device. This combination results in excellent surface finish combined with high productivity. The working platform of the EShM is a round disk (“plate”).

Random orbital sanders are considered universal. They are suitable for both rough grinding (scraping) and finishing polishing for large volumes of work.

The thickness of the removed layer of wood can be adjusted by pressing harder or weaker on the platform. Performance can also be adjusted by changing the diameter of the vibration circle (eccentric stroke). The lower this indicator, the lower the productivity, but the better the processing quality. And vice versa. Therefore, for primary grinding, large vibration circles are installed on the machine, and small ones for final grinding (polishing).

Modern electric motors are characterized by a motor power of 200-900 W. More powerful models are also more productive. They are able to work with larger soles, up to 150 mm in diameter.

The adjustable rotational movements of the sander can be performed at speeds of 4000-14000 rpm. If there is no adjustment, then this figure drops to 12,000 rpm. The speed of oscillatory movements is approximately two times less. The higher the speed of the machine, the rougher the grinding can be, but the higher the productivity.

The size of the sanding pad is also very important for the job. The most popular grinders have a “plate” diameter of 115 mm, 125 mm and 150 mm. Usually the name of the tool already contains a number indicating the size of the sole. Large “plates” are designed to process large flat areas, so they are equipped with machines with high power and productivity. Sanding with a machine with a small "plate" will take longer, but it can accurately sand narrow and hard-to-reach areas.

Help in choosing can be provided by a video review where several grinders from different manufacturers were tested for professional suitability:

Making a grinder from a grinder

Many may say that the “grinder” is the same as an angle grinder, but there are some subtleties hidden here. It should be borne in mind that the angle grinder has very high speeds and often quite a decent weight. To polish a surface with a grinder, you need to have considerable experience in this matter and use special polishing discs and circles. The grinder has much lower engine speed and weight. To operate a factory grinding machine, no specific experience or skill is required.

You can independently make a good grinder from an angle grinder, which is not inferior in its parameters to a factory machine, only by modifying its electrical circuit, by installing the regulator at lower speeds and by using special grinding attachments.

Which sander should you choose – professional or household?

A feature of this type of professional equipment is the high quality of components and assemblies.

Thanks to this, as well as the robust housing design, professional sanders are designed for intensive use. In addition, this class of tool differs from household equipment in its higher degree of wear resistance, larger overall dimensions, weight and price.

Household models of grinders will appeal to those who want to purchase a high-quality tool at an affordable price. However, it is not possible to use such equipment intensively.

When using sanders of this category, you should take a short break every 15 minutes of operation.

This is necessary to ensure that the electric motor of the device cools down.

In addition to the price, the advantages of such a tool include low weight and convenient body design.

Now that you know about some of the features of grinding machines, let's look at their types, as well as the technological and design features of each of them.

What is a sander?

For the convenience of processing internal and external surfaces of wood, plastic, metal or stone, a special grinding machine is used. This power tool is designed to make the product smooth, that is, to reduce the roughness coefficient of its surface. The device is actively used in the process of car body repair, construction work, wall and floor repair, and furniture restoration. A grinding machine significantly speeds up manual labor and improves the quality of the work performed.

Vote

Which sander did you choose?

Hitachi SB8V2

0.00 % ( 0 )

BOSCH PBS 75 AE

9.68 % ( 3 )

Bort BBS-801N

6.45 % ( 2 )

Makita 9910

0.00 % ( 0 )

Hammer PSM 220 C

6.45 % ( 2 )

Interskol PShM-32/130

6.45 % ( 2 )

BOSCH PSM 200 AES

3.23 % ( 1 )

Makita BO3

3.23 % ( 1 )

DeWALT DWE6423

32.26 % ( 10 )

Rupes ER 05TE

9.68 % ( 3 )

Makita BO6040

6.45 % ( 2 )

What is sandpaper

Sanding paper is a combined material that consists of:

• The basis of sandpaper is most often paper or fabric.
• Abrasive is a grain that is applied to a substrate using glue or resin.

Manufacturing

Sandpaper production was first started in China in the 13th century. Craftsmen glued river sand of various sizes, crushed shell rock, and plant seeds to parchment using agar-agar or starch glue. Later they came up with the idea of ​​using crushed glass as an abrasive, hence the appearance of “glass paper.”

Serial production of sandpaper began in London in 1833, then began to spread throughout the world, technology improved, and today we see a variety of types of this product.

Production stages:

1. The paper base or fabric is impregnated with polymers, most often rubber latex.
2. Glue heated to 30...50C is applied to the prepared base.
3. The abrasive of the required fraction is applied using the bulk method.
4. The semi-finished product is sent to the oven for drying. The temperature depends on the type of glue, grain fraction and other factors.

In this way, you can make low-quality sandpaper at home using thick cardboard, crumbs from an abrasive wheel or crushed glass, sand.

Release form

Finished products are stored by stacking sheets or rolling them into rolls. Sheet fabrics have sufficient rigidity, so they are difficult to bend. Sandpaper in rolls is more compact to store, its fraction and grain size are smaller than that of sheet sandpaper.

Other release forms:

• The abrasive mesh is a sparse sheet with fixed grain. When sanding, even the smallest dust particles pass through the material and do not become clogged in the pores. This working method is called “dust-free sanding”.
• Abrasive wheels are fine-grained sandpaper cut to the shape of attachments for mechanical devices. Its purpose is to clean the metal surface from rust and remove old coating.
• Sandpaper of different grits, cut to the shape of the attachment for power tools with Velcro fastening or to the holes made.
• Sanding belts intended for threading into sanding machines and machines.

Marking

Sandpaper markings indicate the fraction and concentration of the abrasive. Domestic GOST 3647-80 determines the number of grains of different sizes per 1 square unit, but this classification is considered outdated. Today, sanding paper complies with international ISO standards; this designation can be found on the back of the product. It should be noted that the data of the old GOST and the values ​​of international standards overlap with each other. Their correspondence can be seen in the table.

The main difference between the old and new standards is the different movement of numbers in the markings:

• In GOST 3647-80, the values ​​of grain size and density are reduced, which is quite logical;
• In the new ISO 6344 standard (GOST 52318-2005), the product number increases with decreasing value in the marking.

Decoding grain size

The letter "P" in the designation indicates the grain size. The larger the value behind the letter, the finer the skin fraction. P400 is a known zero. P600...P2500 have small fractions and an almost smooth surface; their grain size is not so noticeable to the touch. This type of sandpaper is used for final polishing in industry.

In the old GOST, things were different. Using 10-N as an example: the first number means that an abrasive of a size corresponding to a sieve with a mesh of 100 microns is applied to the surface of the product. The lower the indicator, the smaller the screening size.

Other designations

Types of sandpaper differ in the composition of the base and the properties of the grains. This information is also reflected in the product labeling.

• The letter “L” indicates the sheet form of the product. Rolled is not indicated in any way.
• The letter "M" stands for waterproof sandpaper.
• The product marked “P” is intended for grinding dry products without contact with moisture.
• “1” is an abrasive for soft surfaces, “2” is for hard surfaces.

To select emery for a certain type of work, you should take into account not only the main classification, but also the information provided, which is contained on the back of the sheet.

What to look for when choosing

In addition to the type of grinder, it is necessary to take into account basic technical parameters:

• Electricity consumption: from 110 to 600 W. It's worth noting that more efficient machines tend to use more electricity. For home, a 300 W option is suitable.
• The number of revolutions the sole makes: 6-25 thousand. Most often, slow instruments have high amplitude. Such models are used for rough processing. For finishing sanding, it is better to choose an electrical appliance with a higher speed.
• Amplitude: 1.5-5 mm. Shows how much the sole moves relative to the material with each movement. If you need a device for rough work, you should choose a device with the maximum value, and for fine finishing 1.5 -2.5 mm is suitable.

Best in the household series

Despite the shorter service life, the household series tool can process flat and curved surfaces. Perform rough and fine grinding of concrete, plaster, putty. Polish metal, plastic, glass, natural and artificial stone

KOLNER KRS 430 – the cheapest in its segment

The eccentric machine is used on wood, metal and plastic surfaces. Used for leveling plastered walls during home renovations. Polishes varnish and enamel coatings. Smooth speed control determines the required processing mode. Equipped with a dust removal system, which allows operations to be carried out indoors.

PROS

• Affordable price.
• Power.
• Low noise.
• Autonomous dust collector.

MINUSES

Does not perform fine polishing of the car body.

PATRIOT OS-125 – the lightest

The grinder will perform the stages of rough and fine processing of flat and curved surfaces. The low weight of the tool allows you to spend more time working without fatigue during the processing of a part. An effective dust extraction system concentrates waste into a removable dust container. The abrasive wheels are fixed with Velcro, which ensures a quick change of consumables.

PROS

• Lightweight - the hand does not get tired longer.
• Optimal power for home repairs.
• Effective cooling system - the electric motor does not overheat.

MINUSES

You have to hold the machine tighter - centrifugal forces tend to tear it out of your hands during the working process.

ENKOR MSHE-450/150E – the largest fluctuations

Works effectively during rough and medium grinding operations. Levels the plastered surface and smoothes the finishing putty. Removes old paintwork, rust, and scale from metal workpieces. The presence of an additional handle makes it easier to use.

PROS

• Increased diameter of the work plate.
• Long cord.
• Endurance.

MINUSES

• Ineffective dust collection system.
• The fixation of the sanding attachments fails quite quickly.

BOSCH PEX 300AE – the most productive

Tool for household use. Despite the classification, it allows dry sanding of wood, metal, and plastic. It is used for home repairs to remove old paint coatings, leveling plaster and putty. Dust emissions are mitigated by an effective microfiltration system.

PROS

• Allows you to perform a large amount of work.
• Doesn't get dusty.
• Equipped with an anti-vibration system.

MINUSES

• A bit noisy.
• Abrasive discs do not work evenly over the area.

ELITECH MSHE 0515E – the most powerful

The power of the electric motor is sufficient to perform operations such as grinding down convexities of plastered walls, smoothing the putty layer, and grinding the surface of ferrous and non-ferrous metals. Performs rough and finishing processing of wooden blanks. Connecting a vacuum cleaner allows you to keep your work area clean.

PROS

• Powerful electric motor.
• Work at a semi-professional level.
• Long cable.

MINUSES

An extra handle is missing.

Application of belt sanders

Belt sanders are used where it is necessary to quickly remove a fairly thick layer of material, for example, to sand an unplaned board or remove old paint from surfaces. LSMs are also used for precise fitting of parts and processing of the cut line.

The material is processed using an abrasive belt closed in a ring and stretched over rotating rollers. When moving, the tape removes a fairly thick layer of material, comparable to the work of an electric planer. The thickness of the removed layer depends on the grain of the abrasive belt.

When choosing a blade grinder, you need to pay attention to two parameters: the width and length of the abrasive belt used and its rotation speed. The area of ​​the processed surface depends on the width, the aggressiveness and degree of processing depends on the speed.

The standard tape sizes for LSM are: 76x457 mm, 76x533 mm, 76x610 mm. The belt width of semi-professional sanders may be larger - 100 mm, but they are rarely used for household needs. The belt speed is usually in the range from 150 to 500 meters per minute, the power is from 400 to 1200 W. Useful functions include smooth control of the belt rotation speed and an automatic belt centering device, which prevents it from slipping off the rollers even during rotational movements.

Belt sander for wood

There are two types of abrasive belt for blades, with an abrasive layer of aluminum oxide or zirconium. Zirconium tape provides a deeper but more aggressive finish and promotes scratches that need to be treated with a less grainy tape. For processing metal surfaces, it is better to choose a zirconium tape; it can be used to sharpen cutting surfaces.

Surface processing using a belt sander is carried out as follows: place the machine on the surface to be processed without distortions, and, without putting pressure on the machine, make smooth longitudinal or circular movements along the surface of the material. If precise fitting of parts is necessary, grinding is carried out with short-term translational movements or using a bounding frame.

Examples of models for specific tasks

When choosing a CMM, you need to accurately determine the tasks to be performed. As an example, we can look at a specific situation: a car grinder - which one is better.

For car repair and polishing

For initial processing, you can select the Sturm BS8511U unit. It is ideal for initial cleaning of metal surfaces and stripping off paintwork. This is a very useful unit if you need to repaint certain parts of the car after cleaning the surface first.

Unfortunately, the unit is not suitable for final polishing. Therefore, for further car repairs, you can use a special machine UPN 1200/180 Em 00000020585, designed for polishing.

The information provided is enough to understand what types of grinders there are and to independently choose a unit for your home, garden or professional needs.

Kinds

Before choosing a wood sander, you need to familiarize yourself with the main types of devices.

Tape

It is recommended to buy such carpentry sanders for the first sanding of wooden surfaces. They are ideal for removing old layers of varnish or paint. Also, tape devices are often used to fit furniture parts.

Belt-type tools work on the principle of a plane. The circle-shaped tape rotates on special rollers. To start the sanding process, you need to press on it with a wooden product.

Orbital (palm)

When choosing a sander, you may encounter orbital devices. They can be divided into two main types.

Standard

Tape devices - most common models

It is recommended to buy such grinding machines for people who often have to work with uneven surfaces. Standard orbital models are suitable for processing sharp corners and flattened edges of wood.

These devices resemble tape devices. The only major difference is that grain paper is used instead of ribbons. Compared to belt sanders, orbital sanders are more versatile and multifunctional. Some consider them to be the best devices for sanding wood.

Random orbital

Another device that is often used for processing wooden products is random orbital CMMs. They differ from other models in the features of their work. Sanding is carried out using the installed sandpaper. It not only moves with the help of rollers, but also vibrates a little. Thanks to this, it is possible to clean even ribbed surfaces.

Detailed and multi-tooled

The best wood sanders include detail and multi-tool products. There are several varieties of such models.

File Sander

File Sander - universal polishing machine for polishing various materials

Quite often people hear the terms “finger sander” and “sander”, but do not know their exact meaning. These phrases are used to describe grinders that are equipped with a very narrow belt. With its help, it is possible to process even hard-to-reach places that cannot be reached using conventional CMM.

Such models are universal, as they can be used for sanding coatings made of:

• metal;
• wood;
• plastic;
• ceramics.

To process the above materials, you will have to use paper of different grain sizes.

Oscillating spindle

Oscillating spindles are often found in the ratings of grinding machines. This is a static tool that is equipped with a fairly long grinding drum.

Such CMM models are often used as tabletop tools. They are used for processing difficult angles, as well as curved surfaces. At the same time, the oscillating spindle is capable of sanding not only wood, but also metal.

Sander straight

Drum CMMs will help clean wood from glue, paint or varnish

Many people don't know which sander is best for smoothing straight edges. For such purposes, it is necessary to choose a straight sander. This tool will quickly smooth out all the edges and polish your plank floors or walls.

The main difference between this tool can be considered the features of its operation. During sanding, the sandpaper moves parallel to the grain. Thanks to this, it is possible to polish the edges of products much better. It also makes sanding ribbed surfaces easier.

Drum type sander

People are often interested in which sander is best for sanding wooden floors. A fairly popular tool that is regularly used in woodworking is the drum-type CMM. This device can be used to remove residual glue, paint or varnish. Also, with the help of such an angle grinder you can process surfaces made of plastic, metal and ceramics.

Useful videos

Comparative analysis of three types of wood sanders:

Sanding is a mandatory procedure to give parquet a presentable appearance. With its help you can level a wooden surface, clean out scratches and cracks. Of course, grinding is not done manually, but using special equipment - grinding machines. There are a large number of similar units on the market, differing in type of design, purpose, and mode of operation. Let us outline their main technical characteristics for the optimal choice.

There are a huge number of varieties of parquet sanders, but all of them can be combined into several groups:

• drum - the working surface is represented by a cylindrical shaft on which an abrasive belt (sanding paper) is installed;
• belt - the working surface is formed by an abrasive belt moving between two moving shafts (rollers);
• disc – grind the surface with discs (one or more);
• vibrating – equipped with a vibrating working sole, which makes “troweling” movements during the grinding process;
• eccentric (orbital) - the working sole simultaneously rotates and vibrates.

Each of these types of equipment solves its own problems and has operating features. Let's look at these nuances more clearly.

Main settings

Before choosing a tool, you need to understand its main characteristics.

1. Power. The performance of the grinder depends on this parameter. The power of this tool ranges from 600 to 2500 W. The greater the power of the unit, the higher its quality indicators. They weigh more and cost an order of magnitude more. For simple woodworking, a grinding machine with a power rating of 600-800 W is suitable.
2. Working surface area. This value affects the speed of work. The larger the working surface area, the faster it will be possible to grind the desired plane. Belt options have a smaller working surface, while vibrating ones have a larger one.
3. Disc diameter. The diameter determines the area that can be processed at one time. This parameter also affects the finishing time.
4. Additional equipment. Different models can be equipped with additional auxiliary elements.
   Additional handle. The handle helps to evenly distribute the load and reduce vibration. They are mostly two-position, less often three-position.
5. Dust collector. Collects dust that is generated during operation of the mechanism. It can be either built into the unit itself or be a removable element on the side. There are replaceable and permanent options for dust collectors.
6. Speed ​​stabilizer. It can be used to control the rotation speed. The stabilizer allows optimal use of the grinding machine's performance.
7. Speed ​​controller. With its help, you can control and regulate the speed required for work.
8. Case. A convenient way to store and transport tools.
9. Battery. For autonomous use of the grinder, some models are equipped with a removable battery.

Drum type machines

A drum sander is a technique designed primarily for rough grinding. At the highest level, it also copes with sanding - removing the paint layer from parquet.

The operating principle of drum machines is based on the rotation of a cylindrical shaft (drum), “started” by an electric motor. An abrasive belt is installed on the shaft. When the drum rotates, it is pressed tightly against the wooden surface and “erases” a layer of the specified thickness from it (depending on the grain size of the abrasive on the belt). On average, during the grinding stage, a drum machine removes a layer of 1-1.5 mm from the surface. This is accompanied by the formation of wood dust and sawdust, which is why most models of drum machines are equipped with dust collectors.

The abrasive belts used for this type of sander are quite coarse - P24-40. Therefore, they cannot cope with polishing and after passing through a drum machine, they usually require modification by other types of machines (disc, vibrating, eccentric).

Any drum sander is a massive unit that moves on wheels. Weight can vary from 70 to 90 kg (on average). The smaller the weight (and therefore the dimensions) of the machine, the easier it is to operate, but its performance may be lower. If you have to work in an apartment, it is better to use a machine with less weight. For large production areas, larger units are more suitable.

Performance also directly depends on power. The average value is 2.2 kW. The greater the power, the stronger the mechanical impact on the surface. Moreover, such a machine can “pull” a large drum (with a wide and long abrasive belt).

How to cut a coffee grinder?

On the Internet, this topic is so “hackneyed” that you can get confused in the advice of “masters” on how to work with an angle machine correctly and safely: for yourself or for yourself?

This is because there are no generally accepted standards (scientifically validated by government experts) that are suitable for all types of work. Therefore, each experienced master confirms or denies different methods. As they say: there are as many people as there are opinions.

To avoid bad consequences, we will try to tell you the correct method based on the safety concepts and operating principles of angle grinders.

I’ll say right away that you can work for yourself or independently, both options will be correct if they are technically and safely observed.

On all grinding machines the spindle rotates clockwise.

1. When we take the tool with our right hand and with our left hand by the additional handle, the disk rotates in our direction, which is called “toward ourselves.” In this case, you need to cut the coffee grinder yourself. Sparks will fly to the ground when the angle grinder is on its side. With this cut, the saw does not cling to the cutting edge, so it will not bite, clog or break.
2. By moving the additional handle to the lower position, you, on the contrary, will work with a sander. The cutting blade will be facing in the opposite direction from you, making an “away from you” motion. This sawing technique is less convenient because you have to bend over to see the markings. Another feature of cutting on your own with a sander is that the movement of the tool will occur towards you. The sparks will be directed in the opposite direction. This method is mainly used by left-handed people.

Any of these methods of working with a sander is correct. Main

take precautions, do not cut the material against the “wool”

How to cut metal?

Metal is cut according to the principle described above

Let's explain some features to pay attention to:

1. Sheet metal up to 3 mm. It can handle grinding machine power up to 1 kW and disc diameter 115-125 mm. On a thin surface, the wheel wears out faster due to the vibration of this material. To avoid this, place an extra board on the cutting line.
2. For thicknesses from 3 mm, the grinding machine is more powerful and has a larger wheel diameter. You don't need to press the tool while cutting, the high speed will do everything for you. When working with a 250 mm diameter blade on thick workpieces, be careful not to twist it. Otherwise, you will get a curved section and a rupture disk.

Always ensure that the work piece or pipe does not pinch the saw. You must know exactly what will happen in the first second after you start cutting.

How to cut concrete and stone?

It is difficult to cut concrete, stone and brick because the cut is almost invisible due to the dust.

READ How to Use a Wood Sander

The first 10 cm will need to be cut blindly. Then, without turning off the sander, remove it from the cut and look at where the cut went.

Apply the included grinder to the cut, adjusting it to the cutting line. We look at the verticality of the disk and slowly draw it in the air above the cut line. If the sander is not warped, lower it to the edge of the cut and sink it slowly. The dust column forms again, so we continue to move “blindly” along the required mowing line, adhering to verticality and the desired angle. The deeper the cut, the tighter the machine should be sharpened.

If you do it right, you will feel the wedge before you hit. And you can even stop the impact by turning off the power and holding the crusher in the cut.

How to cut tiles?

Cutting tiles without chips is carried out using abrasive discs for stone. A diamond blade will cut faster, but will hit a lot. Can be used where a small incision is not required.

You need to cut the tiles using constant back and forth movements. You don't have to stay in one place (as you would when cutting metal or concrete) to prevent the tiles from melting and cracking.

Good tile cut. This is the correct choice of nozzle and precision in work. You can even cut hard floor tiles with an abrasive stone blade without chipping.

How to choose the right one based on your needs

Any hand-held electric tool has criteria that determine the parameters for its selection. For grinding machines, the general selection criteria are:

1. Electrical power – the performance of the tool depends on it.
2. The method of connection to the energy source (cord, battery), and if there is a cord, its length.
3. Ease of use - depends on the type of materials used and finishing elements (rubber handles, handles, etc.), as well as the location of the handles on the product body.
4. The weight of the tool – the mode of use depends on it, as well as the ability to work “in weight”.
5. Availability of automation and protection systems - soft start and protection against short circuit currents.
6. Possibility of adjusting speed modes - drive speed and abrasive tool speed.
7. Possibility of connecting to a vacuum cleaner or dust storage container.

Using belt-type machines for grinding workpieces

When choosing belt-type models, in addition to the above criteria, you should pay attention to:

• length and width of the tape;
• type of belt centering mechanism (manual or automatic);
• presence of a brake;
• shape and the presence of an additional handle for ease of use.

When choosing orbital-type models, you need to pay attention to the following nuances:

• sole diameter;
• eccentricity value;
• presence of braking function.

Variety of types of wood sanders

When choosing vibration devices, you should pay attention to:

• shape and size of the sole;
• method of fastening the abrasive material;
• amplitude of the sole stroke.

Delta grinding

This is the same eccentric machine, but it looks like an iron. Just like in VSM, here, with the help of oscillatory movements, material is “selected” from the workpiece being processed. Almost all DShMs are equipped with dust collectors or connectors for connecting a vacuum cleaner. This Metabo FMS 200 can fit into any corner.

Delta sanders or renovators are designed for grinding and polishing hard-to-reach areas, such as internal corners or edges of complex profiles. This Metabo FMS 200 can fit into any corner.

This machine is also convenient for processing areas after decorative cutting of wooden furniture structures with a milling machine. This is a fairly highly specialized tool that is worth buying only if you often need to work corners. For the most part, VSM replaces this polishing “iron” quite well.