What kind of grinder to choose for sanding walls

How to choose an angle grinder

This type of grinders is better known as an ordinary angle grinder.

You will immediately ask what grinder to choose from angular and what grinder is better. To begin with, with an angle grinder you can not only grind materials, but also cut them.

Before buying an angle grinder, it is important to pay attention to a number of technical parameters, which will depend on the endurance and performance of the tool.

As for any other power tool, the power of the motor is important for the angle grinder. In second place is the number of revolutions and the size of the wheel. And the larger the disk, respectively the deeper the cut will be.

Choosing a grinder for the ceiling and walls

An important part of the construction or repair of almost any room is finishing, which begins with sanding and stripping the walls and ceilings. These types of work today are performed by grinders, the correct choice of which out of a large market variety often puts the user in a baffling. So, what you need to know about the electric grinder to choose it correctly?

According to the principle of operation grinders are divided into belt, vibratory and eccentric (orbital). The most popular and effective for dry sanding walls and ceilings are orbital machines of the rotary type with a circular working surface. The principle of their work. the rotation of the soleplate with the emery around the axis in the center of the circle with the simultaneous stroke of the eccentric (oscillation amplitude of 2.5-5 mm). At the expense of this amplitude decreases vibration of the unit and increases the quality of surface treatment.

The main characteristic of the grinder, which should be paid attention to in the first place, is the power. It also affects how long the machine will work continuously, how long it will last and how much material it can remove from surfaces. Machines with power over 0.5 kW are professional and suitable for work on large areas.

The motor of an electric sander can be mounted either directly above the disc (in which case the drive is direct) or on the handle of the machine (drive via a flexible shaft). It is believed that the first option is more reliable, although in practice the differences are practically not detected.

Next, depending on the task, you need to choose the diameter of the base plate (directly the grinding disc), which in most modern models ranges from 150 to 225 mm. The larger the diameter, the more area can be cleaned per unit time.

Most modern grinders abrasive discs are attached to the soleplate on a special Velcro. This makes them easy to change during operation. The discs differ in grit size for different tasks and the presence / absence of peoria.

As the grinding process generates dust, it must be collected and discharged. Depending on the amount of work, a special dust bag can be used for dust extraction, usually included with the machine, or an industrial vacuum cleaner connected to the same nozzle as the dust bag.

By type of handle grinders are divided into manual and so-called “giraffe”. At manual machines handles are attached directly to the soleplate, such a unit is usually compact, not heavy and optimal for work in confined spaces, but does not allow you to work on remote surfaces without additional equipment (stilts, stepladders, platforms). “Giraffe” has an extended, often telescopic handle. Sanding disc is quite free to bend at the desired angle, allowing you to effectively handle high walls and ceilings.

Some models have illumination around the circumference of the sole plate, which allows you to monitor the grinding process more closely.

kind, grinder, choose, sanding, walls

The considered electric grinders are used for scraping, polishing and smoothing almost all surfaces and materials. They can work on wood, plastic, drywall, concrete, brick, metal.

For more detailed advice and selection of grinding equipment, you can contact the managers of our company in a convenient way for you.

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

Each type of grinder is designed for specific tasks: where one will show unsurpassed results, the other will be helpless. For example, the eccentric grinders will not cope with the processing of inner corners, in contrast to their less advanced counterparts. vibrating models. In this article we will tell you about the main types of grinders. Explain the principle of their work, the scope of application and other nuances that will help determine what to buy a grinder for specific carpentry needs.

We should immediately say that such options grinder tools, such as abrasive attachments to the drill, screwdriver or angle grinder (angle grinder), we left out of our talk. They are suitable for rough sanding surfaces, but will never give a good result when sanding wood surfaces accurately.

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Sanding wood is responsible

The sanding process may seem like a formality, but it is not. The responsibility factor is extremely high. Sanding flaws that are imperceptible at first glance are immediately apparent after the finish has been applied, and rough mistakes can easily ruin a workpiece. Scuffed layer of finish, burn marks on the edges, left pits and scratches, such defects are very difficult to correct, because of them often even have to send the workpiece to scrap.

What sander for the home?

For large and urgent tasks, where the quality of sanding can be rough, belt sanders are excellent. This work is associated with grinding wooden surfaces: doors, window frames, garden benches.

Orbital sander is more suitable for small volume of work with wood, where quality is in first place. Can be used to remove rust from metal structures.

If you need a tool at a low price for delicate sanding of paintwork or hard-to-reach places, a vibrating tool is the best choice.

For household tasks and minor repairs, a good choice would be a multi-tool with sanding function. This device can be called universal thanks to the change of cutting tools.

For a small carpentry shop, the best option is a belt and orbital sander.

What grinder to choose and for what works. Pro tip

The final stage of any construction and repair is finishing work. In the process of finishing you have to work with different materials and perform various works from rough cleaning to polishing. For these tasks there is a special power tool grinders.

They are needed for manufacturing and restoration of wooden furniture, smoothing of putty walls, finishing and polishing of different surfaces. In this article you will learn the purpose, differences and scope of application of grinders. And also the characteristics that you should pay attention to when buying them.

Rating of grinders 2019. TOP-18 best

By grinding in today’s construction, repair, woodworking and metalworking is understood not only the scraping and grinding of flat and regular surfaces, but also complex geometric or circular shapes, with concavities and convexities.

It is clear that to process them qualitatively can only be if there is a handy grinder of the right type.

To choose it correctly, you need to know what kinds of these devices exist, and what are the best grinders in each.

We offer you a complete review of grinders with a breakdown by the principle of their work and structure.

The rating of grinders includes the most typical models:

  • Orbital (working on the principle of the eccentric, their sole simultaneously and rotates around the axis and moves forward with a certain amplitude and frequency). The platform is round, thanks to the double movement grinds very thoroughly and qualitatively;
  • Vibratory with a flat rectangular or delta-shaped platform, perfectly penetrating into any corners, tight places and edges when edging. The principle of action is vibration, back and forth motion with high frequency;
  • Belt sander very productive, quickly grind a large square, once can remove a large layer, but after they need to go more and finishing machine vibration or orbital.

We have also allocated for you three more special types:

  • For walls and ceilings, they also have a round base, but there are design features that allow effective use in the repair of premises;
  • Straight grinders equipped with a grinding spindle with an abrasive nozzle. Indispensable for deburring welds, finishing of complex shapes;
  • Engravers a special kind of grinder, almost a universal tool to drill, mill and perform engraving. Their lot is fine detail and jewelry work.

In each type you will find the best quality and functionality of the model from the stable and well-known brands. They were the leaders in the sales rankings this year.

Top grinders

The top segment includes mostly power tools for professionals. These are quite expensive grinders, and some of them are strictly specialized.

Such expenses are unreasonable for home use. But if you make money with the tool, it will pay back quickly enough.

Einhell TC-DW 225

Einhell TE-DW 225 is a specialized sander for walls and ceilings. And it is one of the cheapest in its class. The grinder is intended for home and semi-professional use: its performance is high, but in order to reduce the construction cost the manufacturer has left only the basic nodes and functions.

For example, there is no backlight, no turbine (you can grind only with a connected construction vacuum cleaner ). TE-DW 225 does not support the creation of vacuum, but such a function for such a price is atypical. Vacuum has a wall grinders from 25 000 hryvnia.

The vacuum is not really needed here, though: the Einhell TE-DW 225 weighs only 3.2 kg, which is a low weight for such devices.

The machine is equipped with a 6-position speed switch (600 to 1500 rpm). Movable head with a grinding plate with a diameter of 225 mm. This consumable is easy to buy, especially since Einhell itself sells them in packages of 10 pcs.

There is a more advanced model Einhell TE-DW 225 X, which is sold with a second triangular platform. The interchangeable base is designed to grind corners, which cannot be done with an ordinary round head, and therefore has to be done by hand.

Milwaukee SPS140 113x105mm

Milwaukee SPS140 is a vibratory sander with a base of 113×105 mm. It has no speed setting and can only work with wood. The SPS140 is limited to joiner’s shops. The power tool is designed for professionals, but the cost is reasonable to buy Milwaukee SPS140 for domestic use.

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The grinder is comfortable, in operation. Includes dust bag and abrasive kit. When you run out of paper, you can buy any suitable one and then cut to size. The machine is sold with a puncher, which will allow you to quickly make holes to pick up debris.

The main advantage Milwaukee SPS140 warranty 3 years. Also, the tool is assembled in the USA and not in China.

Suitable for professionals and amateurs

Toptul pneumatic orbital 6″ 2.5 mm (KAMA0603)

Air grinders compared to electric ones win on several points. They:

have a simpler design, no electronics and are therefore less prone to breakdowns.

All these advantages are inherent in a Toptul air sander. This model has a disk diameter of 152 mm and the eccentric stroke of 2.5 mm, weighs 800 g and the maximum speed of 10 000 rpm. There is a similar model, but with an eccentricity of 5 mm. Toptul sander sits well in the hand, and has a convenient frog start.

Only one disadvantage: you need a powerful compressor. The consumption of compressed air is very high, and therefore in the home you are unlikely to create the conditions for the use of the sander Toptul. But it is perfect for the car repair shops, where there is always a powerful compressor.

Bosch GBS75AE

The GBS 75 AE is a professional class belt sander with a 750 W motor, which makes it very productive. A plus, but only in good hands. The inexperienced user when sanding large surfaces can make a pit. Therefore, if you are not confident in your abilities, it is desirable to grind at reduced speed: for this purpose, the machine is the regulator.

The way out can be a frame, which acts as a limiter of the processing depth. Of the useful Bosch accessories for the sander GBS 75 AE additionally produces a stand for vertical and horizontal installation, parallel stops. With these the tool is capable of replacing a simple woodworking machine.

Similar accessories that are designed specifically for the GBS 75 AE is a definite plus, but there is one but. You have to buy them separately, and they are not cheap.

By the way, you can buy a grinding machine Bosch PBS 75 A. Which is similar in characteristics, but designed for household use, so it costs half as much.

Festool ETS 150/3 EQ

Orbital sander ETS 150/3 EQ professional power tool. The diameter of the base plate is 150 mm, and the eccentric stroke is adjustable to 3 or 5 mm. There is also a fine adjustment of speed from 4000 to 10,000 rpm. After sanding, the surface comes out very clean, ready for polishing or other finishing.

The layout is comfortable. The design even allows you to disconnect the power cable.

The main disadvantage of the Festool ETS 150/3 EQ the cost. And this applies not only to the product itself, but also consumables. And it is better to use branded circles, because the plate has a special pattern of holes for picking up debris.

Precise adjustment of the speed and eccentricity

Grinder what company to choose for grinding walls

How to choose a grinder for the home? This question comes up as soon as you start renovation work. Even the smallest ones, but those that include grinding or polishing any surface. In this article, we will tell you how to choose the right grinder for home works and what key points to consider when choosing this tool.

There is a mistaken stereotype that household grinders are suitable only for processing wooden surfaces. In fact, this is not true. These power tools allow you to sand and metal, and plastic, and in general any surface, but depending on what you have to work with, you should pay careful attention to the choice of type of grinder.

When choosing a sanding machine, you should pay attention to factors such as:

kind, grinder, choose, sanding, walls
  • the main material with which you are going to work;
  • the required sanding quality;
  • the method of operation of the machine;
  • the productivity of the tool.
kind, grinder, choose, sanding, walls

Here we will describe for you the main types of grinders and key points so that you can easily decide which grinder to buy. Since there is no universal tool that will do for you to sand and polish any surface, abrasive machines of different classes are available for different types of finishing work.

Belt Grinders (LShM)

These devices are best for machining flat surfaces and large areas. A belt sander is best for rough sanding and scraping the surface, as well as smoothing it and cleaning off old varnish or other coatings.

Pay attention to the main technical characteristics of LShM:

  • the speed of rotation of the sanding belt (the higher it is, the higher the productivity of the machine);
  • the presence of a dust bag or the possibility of connecting the grinder to a vacuum cleaner (this makes cleaning after work easier, and also reduces the amount of dust, harmful to the breath of the worker);
  • soft start mode (reduces wear and tear of the device motor through gentle acceleration);
  • the presence of an angular stop (allows you to improve the quality of grinding for individual small elements);
  • the presence of a support frame (to adjust the thickness of the layer removed from the surface).

For surface finishing, a belt sander alone will not be sufficient. After processing the surface with LSM, there are small scratches or indentations, which can be removed with a vibratory sander.

Vibratory grinding machines (VSM)

These power tools are used for finishing wood, stone, metal and combined surfaces before painting or varnishing.

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Pay attention to the main technical characteristics of the VSM:

  • frequency of motion of the vibratory plate (the higher it is, the higher performance of the machine);
  • availability of built-in dust bag in the machine or provided a hole to connect the HSSM to a vacuum cleaner (facilitates cleaning and reduces the amount of breath-harmful dust);
  • a special mode for adjusting the frequency of vibration (allows the user to configure the machine for the start or finish of the surface)
  • the shape of the soleplate (flat grinder with a rectangular soleplate or delta grinder with a triangular. for large areas and hard-to-reach places, respectively).

However, if you need to work not with a flat surface, but, for example, with a curved surface, both belt and vibrating grinders are not only inconvenient, but also can ruin the curve, so for such works created an orbital or eccentric grinder.

Eccentric grinders (ECM)

They are used less frequently than the two types of power tools described above, but in some works, eccentric grinders are simply indispensable. And if you are deciding what grinder to buy for cleaning, fine sanding and polishing curved surfaces made of wood, metal or plastic, it is worth opting for this class of equipment.

Pay attention to the main technical characteristics of the ESHM:

  • for fine sanding it is better to choose a machine with a power of 170-750 watts (if more, the sanding will be rougher);
  • for fine sanding, the frequency of oscillation. 3-7 mm (more. for rough sanding);
  • soleplate diameter. 125-150 mm or larger (the larger the size of the sole, the higher the performance);
  • the shape of the handle (if you choose a classic handle, the machine is suitable for polishing large areas, but if the handle for the palm, the device is well suited for work in hard-to-reach places).

It is. Key aspects to focus on if you want to know how to choose the right grinder. However, it is always better to get advice from a specialist. In our store TD “Petrovsky” you can get advice from a specialist who is well versed in both the technical characteristics and the specifics of the equipment of different manufacturers. Contact us, and we will tell you how to choose a grinder for your home and your needs.

Technology tool abrasive dust extraction tool.

And better. in this order, because the technology determines everything else. For example, it’s more efficient to sand old paint off walls than to sand it down. And these technologies require different tools and equipment. Here’s a comparison of grinding solutions and required equipment.

Let’s begin with the data of manufacturers. Here’s what the manufacturer FESTOOL (Germany), for example, provides:

With capacity up to 30 kg per hour PLANEX LHS 225 deservedly wears the leader’s jersey, which in principle is confirmed by most of the Masters. According to Festool, eccentric grinders with a sole diameter of 150 mm are 10 times behind. But at the time of testing there was no MIRKA DEROS machine. which, as we will see below, has significantly reduced the lag of machines with a 225 mm diameter soleplate.

Important note: here the performance, for example: “up to 30 kg”. is specified as the maximum figure under ideal working conditions. This is not a standard one, as the performance depends on many factors: preparation / condition of the surface, quality and fraction of the putty, experience of the DIYer, tools, etc.д.

Another manufacturer that tested their machines was MIRKA (Finland):

From this diagram we see the following:

Compared to paper-based abrasive wheels, the mesh abrasive has a 27% higher productivity due to faster and better dust extraction. This once again confirms the fact that an effective dust extraction significantly increases productivity, not only by increasing the suction power, but also by increasing the suction surface area. This is the solution implemented in the mesh abrasive.

Eccentric machine MIRKA CEROS (more modern DEROS) electric rotary-orbital ( eccentric) machine with a stroke of 5 mm, under equal conditions, lags behind in performance from the Giraffe only 35%.

Mesh abrasive material on the larger surface of the soleplate gives a much higher result: on a 150 mm diameter soleplate (plate) plus 27%, and on a 225 mm soleplate double or more.

Now combine these tables and the information that we were able to gather together on this topic on the pages of Runet.

In order to balance all possible options in terms of validity of comparison, we will accept the following assumptions:

Consider that in all cases abrasive material of grit P 120 on paper base was used. For this purpose, let’s assume, that the shooting with the abrasive with grit size P80 is more productive than P120 by 30%.

A similar abrasive was used for each machine: paper base, open mound, grit. aluminum oxide.

Dust extraction. professional with the use of a construction vacuum cleaner, except for manual sanding with sanders without dust extraction.

As an eccentric machine with a diameter of 150 mm in the table took the most productive version (according to feedback from the Masters themselves). MIRKA DEROS.

Consider that the suction power is the same (using the same vacuum cleaner).

Sander VS Grinder! Which one to buy for woodworking shop?


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