Types of power tools
According to the "China Power Tool Industry Production and Sales Demand Forecast and Transformation and Upgrade Analysis Report" statistics, power tools are mainly divided into metal cutting power tools, grinding power tools, assembly power tools and railway power tools. Common power tools are electric drills, electric grinders, electric wrenches and electric screwdrivers, electric hammers and impact drills, concrete vibrators, electric planers.
The main specifications are 4, 6, 8, 10, 13, 16, 19, 23, 25, 32, 38, 49mm, etc. The number refers to the maximum diameter of the drill bit for drilling on steel with a tensile strength of 390N/mm. For non-ferrous metals, plastics and other materials, the maximum drilling diameter can be 30-50% larger than the original specification, and a polishing machine is provided.
Electric wrench and electric screwdriver
For loading and unloading threaded joints. The transmission mechanism of the electric wrench consists of a planetary gear and a ball screw groove impact mechanism. Specifications are M8, M12, M16, M20, M24, M30, etc. The electric screwdriver adopts a tooth clutch transmission mechanism or a gear transmission mechanism, and the specifications are M1, M2, M3, M4, M6, etc.
Hammers and impact drills
Used for drilling, grooving and roughening of concrete, brick walls and building components. Combined with expansion bolts, it can improve the installation speed and quality of various pipelines and machine tools; the impact principle of the electric hammer is to generate impact power by the movement of the internal piston, and the impact principle of the impact drill is that the gears are running in to generate impact power, so the impact of the hammer more force.
Used for tamping concrete when pouring concrete foundations and reinforced concrete components to eliminate air holes and improve strength. 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.
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 bench. The cutter shaft of the electric planer is driven by the motor shaft through the belt.
Commonly known as grinder; electric grinder; electric grinder, a power tool for sanding with a grinding wheel or a grinding disc.
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