Angle grinder, or angle grinder, or angle grinder, or grinder (design. "Bulgarian, turbine") - a grinder for cutting, grinding and grinding products made of stone, metal and other materials, in which the axis of the engine and tool (grinding disk) located at an angle of 90 ° relative to each other (in contrast to direct grinding machines, where the working tool is on the same axis as the engine). It is used in construction, metalworking and wood processing. The body resembles a cylinder in shape, often with a side handle near the attachment point. The angle grinder contains a universal commutator motor (UKD), a start switch, an angular gear transmission and a disk mount. Some models are equipped with a speed controller.