Bulgarians: Features of choice
Classic name – angular grinding machine. A multidisciplinary tool that can be polished, cut and polished. And with a little experience – and sharpen. You can also remove the rust or layer of old paint with a grinder. Excellent copes with metal, cement, granite, cement, concrete, brick, stone and marble. But for certain materials you need special working abrasive discs. Humanity is working on the invention of universal.
The etymology of the folk name is very simple. The producer of the first tools in the Soviet Union is Bulgaria. It was at the dawn of the 1970s.
To select a suitable tool, you need to know several key technical characteristics. The first is the size of the abrasive circle. The diameter affects the further selection of power, the number of revolutions, etc. D. The standard for most Bulgarians is considered diameters of 125 mm and 230 mm. Although there are more options on the market: 115 mm, 150 mm and 180 mm.
The second indicator touches the speed of the disk rotation. The norm is 80 m \ s. If faster, then the disk can fly up. And at speed, this almost certainly means injury to the operator and others. You can lower the grinder of the grinder, but this will hurt the tool itself. The disk wears out more, since the resistance increases. In parallel, the disk takes more time to perform one turnover, which reduces its performance. The cutting of the material occurs more slowly and its quality is reduced. Although if a grinding machine for concrete, wood is used, then such problems are usually not found here.
Third advice – look for an angle grinding machine with stabilization of the speed of rotation. When a voltage jump, with especially heavy cutting, with a lot of other factors that can knock down a grinder from the operating frequency, the system will protect the tool from possible damage.
Fourthly, look for a grinder that it is convenient for you to keep personally. There are models on one handle, there are two. Sales consultants and advertising promote those models that are beneficial to them. Do not listen to them, focus exclusively on your own convenience. Only the test will tell you which model is worthy of purchase.
Another recommendation refers to the system of protection against overload. The first indicator – the motor begins to bask. Modern models are equipped with a three -stage overload preventing system. On reaching engine windings 130 degrees Celsius, a warning light bulb flashes on a grinder. At 160 degrees, electronics automatically reduces working turns. Extreme line – 200 degrees. Leads to automatically turning off the tool.
Pleasant acquisitions!