Electric tools have the advantages of easy portability, simple operation, and various functions, which can greatly reduce labor intensity, improve work efficiency, and realize manual mechanization. Therefore, they are widely used in construction, housing decoration, automobiles, machinery, electricity, bridges, gardening, etc. , and enters the home in large numbers.

　　Classification of power tools

　　1. Electric drill: a tool used for drilling metal materials, plastics, etc. When equipped with forward and reverse switches and electronic speed control devices, it can be used as an electric screwdriver. Some models come with a rechargeable battery.

　　2. Electric hammer: used for drilling masonry, concrete, artificial or natural stones, etc., and the functions of electric drills are interchangeable. SDS-PLUS drill chucks and drill bits are widely used for light drills, and SDS-MAX chucks and drill bits are used for medium and heavy hammer drills, and chisels can be clamped.

　　3. Impact drill: an electric tool mainly used for drilling hard materials such as masonry and concrete. When the impact mechanism is closed, it can also be used as an ordinary electric drill.

　　4. Grinder: A tool for grinding with a grinding wheel or disc, used for grinding wood. There are straight electric grinders and electric angle grinders. Sandpaper is required.

　　5. Curve saw: mainly used for cutting steel, wood, plastic and other materials, the saw blade reciprocates or swings up and down, and is most suitable for cutting precise straight lines or curves.

　　6. Angle grinder: Also known as grinder or disc grinder, it is mainly used for grinding steel, metal and stone. Commonly used grinding disc diameters are 100mm, 125mm, 180mm, 230mm.

　　7. Cutting machine: It is mainly used to cut aluminum, wood, etc. at different angles. It is divided into metal material cutting machine and non-metal material cutting machine. When using it, pay attention to tightening the saw blade and wearing goggles.

　　8. Electric wrench and electric screwdriver: Both electric wrench and electric screwdriver are used for loading and unloading threaded joints. The transmission mechanism of the electric wrench consists of a planetary gear and a ball spiral groove impact mechanism. The electric screwdriver adopts a jaw clutch transmission mechanism or a gear transmission mechanism.

　　9. Concrete vibrator: used for compacting concrete when pouring concrete foundation and reinforced concrete components. Among them, the high-frequency disturbance force of the electric direct-connected vibrator is formed by the rotation of the eccentric block driven by the motor, and the motor is powered by a 150Hz or 200Hz intermediate frequency power supply.

　　10. Electric planer: It is used for planing wood or wooden structural parts, and it can also be used as a small table planer when installed on a stand. The cutter shaft of the electric planer is driven by the motor shaft through the belt.

　　11. Marble machine: Generally, it is used to cut stone. You can choose dry or wet cutting. The commonly used saw blades are: dry saw blade, wet saw blade, and wet and dry dual-purpose saw blade. Home improvement is used to cut wall and floor tiles.