Power tools are mainly divided into metal cutting power tools, grinding power tools, assembly power tools and railway power tools. Common power tools include electric drills, electric grinders, electric wrenches and electric screwdrivers, electric hammers and impact drills, concrete vibrators, and electric planers.
1 Electric drill: The main specifications are 4, 6, 8, 10, 13, 16, 19, 23, 32, 38, 49mm, etc. The figures refer to the maximum diameter of the drill bit drilled on steel with tensile strength of 390N/mm. For the non-ferrous metals, plastics and other materials, the maximum drilling diameter can be 30-50% larger than the original specification.
2 electric planer: used for planing wood or wood structural parts, and can also be used as a small planer on the gantry. The cutter shaft of the electric planer is driven by a motor shaft through a belt.
3 electric wrench and electric screwdriver: used to load and unload threaded joints. The transmission mechanism of the electric wrench consists of a planetary gear and a ball spiral groove impact mechanism. Specifications are M8, M12, M16, M20, M24, M30 and so on. The electric screwdriver adopts a jaw clutch transmission mechanism or a gear transmission mechanism, and the specifications are M1, M2, M3, M4, M6, and the like.
4 electric hammer and impact drill: used for drilling, slotting and roughing on concrete, brick walls and building components. Combined with expansion bolts, it can improve the installation speed and quality of various pipelines and machine tools.
5 Electric grinder: A tool for grinding with a grinding wheel or a grinding disc. There are straight electric grinders and electric angle grinders.
6 concrete vibrator: used to pour concrete foundation and reinforced concrete members to compact concrete to eliminate pores and improve strength. The high-frequency disturbance power of the electric direct-coupled vibrator is formed by the rotation of the eccentric block driven by the motor, and the motor is powered by a 150 Hz or 200 Hz intermediate frequency power supply.
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Tags: six categories of power tools
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Hot-dip galvanized steel guardrail /w beam guardrail/crash barrier and posts are mainly used for safety protection on highways and first-class highways at home and abroad. Q235 material is used domestically, and Q345 material is used abroad. The steel plate is formed by cold bending and then galvanized and electrostatically sprayed.
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