The story of the “Bulgarian”, how to work properly for her
A grinder is an angle grinder (angle grinder), because the axes of the engine and the working tool (nozzle, interchangeable disk) are at right angles to each other. A machine is used for stripping, cutting, grinding various materials. In everyday life, the angle grinder is called a Bulgarian, because back in the 70s the USSR imported it from Bulgaria in large quantities, but only for production purposes. Although the developers were the engineers of the German plant, which first began to produce it in 1954.
Where is the grinder used
This is the most necessary and common tool. It is distinguished by its versatility, as it is used:
- when woodworking;
- when metalworking;
- in professional construction with concrete, stone, brick;
- in household and repair work in the household.
What is this tool
The angle grinder consists of two parts: the engine and gearbox. A collector motor is located in a plastic cylinder-shaped housing. The gearbox is located in a metal case, on which there is a spindle with a nut, where the nozzle is mounted in the form of a circle or a brush, depending on the nature of the work and processing of the material.
There is an engine start button on the case, some models have a spindle lock button. On professional models, there are modes for setting the speed of rotation of the disk using the wheel under the handle.
Part of the disk is covered by a casing, which determines the size of suitable circles for the grinder. The casing is located on top of the working part of the circle and protects the worker from damage, sparks from metal and fragments in case of disk failure.
How to choose the right grinder
Crucial for the nature and scope of work is the angle grinder power from 500 to 2600 watts. Due to the fact that this is a hand tool with high vibration, weight and additional functions are important in technical specifications for safe, continuous operation of the tool, as well as extending the life of the device.
For domestic and repair work at home, it is enough to have a angle grinder up to 1 kW. Weighing up to 3 kg with discs 115 mm and 125 mm. For example, for cutting and grinding metal, a angle grinder with a power of 600-800 W is suitable - an easy, convenient grinder.
With an average power machine of 1000 W with a 125 mm disk, you can perform concrete work: cutting, grinding, when their small volume is required and other processing on metal or wood.
When the volume of cutting concrete, ceramics, stone within the household, manufacturers recommend taking a grinder with a disk of 125 mm, 150 mm and a power of 1-1.5 kW. These grinders are equipped with an additional handle that can be removed and put for the second hand. Its weight is up to 5 kg.
For professional concrete work, work with natural stone, as well as for large volumes of cutting building materials, angle grinders with a disk with a diameter of 180 or 230 mm and a power of 1500-2700 W are used. They are powerful two-handed units weighing up to 6 kg.
How to work with a grinder
In order to comply with safety precautions, you need to work with goggles or a mask, in clothes with a long sleeve and gloves.
- The working disk must not exceed the dimensions of the casing and the recommendations of the manufacturer of angle grinders.
- Do not block ventilation openings by hand to prevent the engine from overheating.
- The operator needs to stand steady and hold the tool with both hands.
- The material to be processed must be a cross-sectional dimension of not more than 1/6 of the diameter of the circle. The material must be fixed.
- The electrical wire must be folded back so that it does not get under the disk and under the sparks from cutting the material.
For proper operation, the disc must be installed on the outside with the marking, drawing, or in the direction of rotation, if any.
