No. 1 - Metabo LSV 5-225 Comfort
Price: 41 800 rubles
Seeing the price tag, you expect to see some incredible indicators in the power graph of this device, but there you will find a surprise - only 500 watts. Why so little? This device is not intended for rough work, and in finishing work, random mistakes are unacceptable, therefore, slowness and low power in this particular case are an obvious advantage. Such a grinder is suitable for the final processing of walls and ceilings, the work with the latter is facilitated by a comfortable handle, the length of which in the unfolded state reaches 2.1 m.
The length of the power cord is also decent - 4 meters, so it will be difficult for you to find a room in which you do not have enough cable and extension cord to reach the outlet. This is a highly specialized device that must be used strictly for its intended purpose, but it copes with its direct duties at the highest level - a well-deserved first place in the ranking of the best concrete grinders of 2018-2019.
Metabo LSV 5-225 Comfort
Views
Wall and ceiling sanders are produced in several versions.
Tape
These devices are used to prepare the coating for further, finer sanding. Tape machines are not suitable for plastered and putty surfaces, but they can effectively remove a layer of old paint. Household models have a relatively low cost, however, they are designed for short-term infrequent use, and professional ones function even in the most difficult conditions and in an intense rhythm of loading.
Eccentric orbital
Such grinders are used for the finest surface treatment. The sole of the orbital instrument moves along a complex trajectory, due to which it leaves behind an almost perfect surface.
Vibrating flat
In terms of the quality of the finish, these machines are close to eccentric ones, but they work much more roughly, at the same time, the price of both the PSHM itself and the consumables for them is much lower. It is in these machines that sandpaper is fixed with a clamp, while Velcro is used for tape and orbital models.
No. 3 - Bosch GBR 15 CAG
Price: 33 200 rubles
Bosch - it sounds proudly, the power tool from this brand invariably occupies the top lines of any ratings and there are many reasons for that, the main of which is incredible efficiency. Many concrete grinders cannot cope with harder materials like stone and marble, but this does not apply to the GBR 15 CAG - you can cope with granite with such a machine.
In many respects, this performance is achieved due to the impressive power - 1500 W, but the design of the device itself is conducive to the most efficient use of the grinding disc. Although it is small in diameter - only 125 mm, it covers the same area as twice as large specimens on less productive grinders in the same time. As always, the rule works: do not want to waste time comparing different models and carefully comparing their characteristics? Then choose Bosch and you will definitely not be mistaken.
Bosch GBR 15 CAG
No. 4 - Makita PC 1100
Price: 30 900 rubles
Another interesting option from the Japanese manufacturer Makita. This tool is ideal for trimming edges, leveling surfaces and working on facing concrete. The device is quite heavy - 4.3 kg, which means you need to understand that only a fairly strong and experienced man can handle a large room. The power, like the previous model of this brand, is compromise - 1020 W, but hardly anyone will turn their tongue to call the device ineffective.
This is a real Japanese, which is not only designed in the land of the Rising Sun, but also produced by local craftsmen, which means that the degree of reliability is simply unprecedented - even if you really want to, damaging the case and even more so its filling will be oh, how difficult it is. The model has no obvious weaknesses and should have been higher, but even more interesting devices are located at the top of the rating.
Makita PC 1100
Principle of operation
The main working element of any grinder is a horizontal plane with abrasive paper fixed on it. It can be fixed in two main ways.
- With a clamp. This is the most common option and is mainly used on household typewriters. The clip visually resembles a spring latch. For such models, the sanding sheet must be prepared independently from sandpaper, which allows significant savings on consumables.
- With Velcro. Such products are slightly more expensive, they do not require additional cutting of the abrasive. Each tool provides for the removal of dust - as a rule, a dust collector or a vacuum cleaner is used for this, some modifications are equipped with both. Connecting a vacuum cleaner is considered a very useful option, since it allows you to work without taking a break to clean the tank, which in general significantly increases the speed of work.
Description of the grinder "Makita BO3711"
This machine is designed for finishing wood sanding. Grinder "Makita BO3711" is a high-performance industrial equipment. However, this equipment can also be used in a small room.
The dimensions of the abrasive paper for the device are 228x93 mm. The paper is held in special clips. The regularity of fluctuations is from 8 to 22 thousand per minute. At the same time, in idle mode, the number of oscillations is in the range between 4 and 11 thousand per minute. The platform travel is 2 millimeters. The Makita BO3711 requires a 190 W electrical network to operate.
The sander is equipped with a powerful dust extraction system. Dust is removed by means of a sanding plate. If a large area is to be sanded, a dust bag can be installed.
Equipment weight - 1.6 kilograms. The construction is distinguished by an ergonomic design, the presence of a soft grip, framed by rubber.
The choice of the type of grinding device and a specific model is recommended taking into account the nature and volume of the work to be done. You should also take into account the type of surface to be treated, and possibly your own individual preferences.
No. 9 - Graphite 59G261
Price: 13,000 rubles
An inexpensive and affordable sander that's great for dry sanding walls and ceilings. The movable head of the tool guarantees maximum grip on the surface to be processed, so that, despite the modest power - only 600 W, the device is quite productive. You can connect a vacuum cleaner to the device, which will save a lot of time cleaning after work is completed. The sanding pad is protected by a brush segment so that both the pad and the operator are safe.
This miracle of technology weighs a lot - 5.5 kilograms, but this, despite the affordable price, is still quite a professional device, and therefore efficiency is at the forefront for it. The delivery set is rich, but the quality of the materials from which the body of the device itself is made leaves much to be desired - you should not knock it on the walls again.
Graphite 59G261
Features of grinding
You can start surface treatment with a grinder only after the putty is completely dry and hard to the touch, usually this does not happen earlier than 24 hours after applying the building compound.Before starting work, you need to carefully inspect the walls, as well as the ceiling, in order to detect all protrusions and surface defects - it is best to use a side illumination with a small flashlight for this, in this case the irregularities begin to cast shadows.
A mesh is attached to the grinder, the grain size of which depends on the type of work selected:
- No. 60-80 - used for rough cleaning of walls before gluing wallpaper;
- No. 100 - optimal for finishing ceiling sanding.
Grind the surface with rotating movements until the place is perfectly flat, that is, it does not cast light shadows from the flashlight. The top layer of putty is usually very delicate, so you do not need to press on the machine with force - you just need to drive it over the surface without pressing down. Make sure that the surface of the clipper is firmly against the wall or ceiling. At the same time, the emery should be located exactly parallel to the base to be processed, and the machine must be driven evenly, otherwise the distortion of the working surface cannot be avoided.
