A concrete grinder is an indispensable thing in the household. It can easily polish not only concrete, but also granite, limestone, and stone. Even a protruding nail or wire will not be noticed. What kind of device is this, how to choose the most suitable one and what they are - read in our material.
The grinder is useful for finishing different surfaces. It easily eliminates any unevenness. A hand grinder will make it easier to dismantle old coatings: concrete, plaster, layers of paint, glue.
What kind of work do you need a concrete grinder for?
- It is necessary to sand the fresh concrete surface or old concrete;
- Preparation of the base for the following types of finishing work;
- The concrete surface needs to be polished;
- Leveling the surface. Easily eliminates all irregularities, bumps and pits;
- Complete removal of the old coating: traces of putty and paint, plaster, dirt, cement screed seams;
- To increase adhesion, it will make the concrete rough. The fact is that after laying the concrete, a thin film forms on the surface of the concrete - cement laitance. This film must be removed, as it reduces the strength of the top coating and will interfere with the adhesion of the following materials;
- Sanding various types of materials, such as in the photo.
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Modern concrete machines differ in design features and are divided according to the purpose of the work.
Sander manufacturers
When purchasing equipment for processing concrete pavements, you need to pay attention not to the country of the manufacturer, but to his name. Due to great competition, many famous brands are moving their production facilities to China and Taiwan to reduce product costs. This does not in any way affect the quality of the finished product, since the entire production process occurs in accordance with technical standards and under control. Of the numerous manufacturers, the following companies are most popular:
- Bosch . A German corporation that produces various types and classes of household appliances and equipment. Their products are of excellent quality and ease of use. The presence of authorized service centers around the world allows you to quickly restore the operation of a failed tool.
- Makita . The price of their instrument is quite high compared to competitors, but it is fully justified by the quality. The products of the Japanese concern are durable and reliable. Under the Makita brand you can find both semi-professional and professional equipment.
- DeWALT . An American brand that introduces innovative developments into its products. The ideology of the enterprise is to provide maximum quality products at minimum cost. It produces tools for both entry-level and professional levels.
- AGP . The company has extensive experience in the design of construction equipment. She has a large number of developments and patents. All products manufactured under this brand are distinguished by powerful and high-quality engines. Each instrument undergoes pre-sale preparation and configuration, which determines its high technical characteristics. Occupies a leading position in the professional tool niche.
- Hitachi . First of all, it is known for the quality of its motors, which ensures good reliability of its products in general. High quality products are achieved through the use of the latest technologies and high quality control.
Domestic companies have also proven themselves well: Zenit, Skif-M, Interskol. Although they are inferior in quality to European brands, they are quite competitive in the household segment due to their low cost.
Types of concrete grinders
Purpose of tools:
- Domestic. Grinding machines with low power. They are used in small areas. Sand concrete floors or walls. Large loads are extremely undesirable for them;
- Professional. Sanders with higher power. Can work long and continuously, sanding large areas of concrete. The included tools can be used for both dry and wet sanding. Of course, such grinding machines require skills in handling them.
By design features
Equipment for grinding concrete differs according to the type of construction:
| Corner | A well-known Bulgarian. Compact size and low power allow it to work in hard-to-reach corners. Angle tools are quite simple to use. |
| Draw machines | Sanding is performed with sandpaper secured in the form of a tape on rollers. |
| Planetary | Machines whose grinding elements have a planetary rotation system. Several abrasive discs are installed at once. |
| Mosaic grinding machines | Mostly mosaic floors are sanded and polished. These are sanders with many settings. |
The photo shows a grinder with a planetary rotation system.
Technical characteristics of concrete grinders
- Power is the most important performance characteristic for sanders when working with tough materials. Concrete grinders have a power of about 900-1400 W. Such opportunities affect speed and results.
- Disc diameter. The most popular wheels have a diameter of 125mm. They are widely used as they are balanced in performance and weight. Disks with a smaller diameter – 100mm and larger – 150mm are used.
