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 screwdrivers, electric hammers and impact drills, concrete vibrators, and electric planers. Accessories that every power tool uses: rotor, stator, gears, bearings, switches, carbon brushes, carbon brush holders, carbon brush covers, and power cords. It will not be repeated below.
① Electric drill: 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. . The maximum drilling diameter for non-ferrous metals, plastics and other materials can be 30-50% larger than the original specification.
② Electric grinder: A tool that uses a grinding wheel or grinding disc for grinding. There are straight electric grinders and electric angle grinders.
③Electric wrench and electric screwdriver: used for loading and unloading threaded couplings. The transmission mechanism of the electric wrench consists of a planetary gear and a ball spiral groove impact mechanism. Specifications include M8, M12, M16, M20, M24, M30, etc. Electric screwdrivers use tooth clutch transmission mechanisms or gear transmission mechanisms, and the specifications include M1, M2, M3, M4, M6, etc.
④Electric hammer and impact drill: used for drilling, grooving and roughening concrete, brick walls and building components. Used in conjunction with expansion bolts, it can improve the installation speed and quality of various pipelines and machine tools; the impact principle of the electric hammer relies on the internal piston movement to generate impact power, and the impact principle of the impact drill is the gear running-in to generate impact power, so the impact of the electric hammer More powerful.
⑤Concrete vibrator: used to tamp concrete when pouring concrete foundations and reinforced concrete components to eliminate pores and improve strength. Among them, the high-frequency disturbance force of the electric direct-coupled vibrator is formed by the motor driving the eccentric block to rotate. The motor is powered by a 150Hz or 200Hz medium-frequency power supply.
⑥Electric planer: used for planing wood or wooden structural parts. It can also be used as a small bench planer when installed on a bench. The cutter shaft of the electric planer is driven by the motor shaft through a belt.
Commonly used bearing models for power tools: 606, 607, 608, 626, 627, 628, 629, 6000, 6001, 6003, 6004, 6200, 6201, 6202, 6203, 6303, 61907, 688, etc. Commonly used carbon brush models: 50#, 408#, 43#, 44#, 303#, 21#, 6M, etc.
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