Power tools are mainly divided into metal cutting power tools, grinding power tools, assembly power tools and railway power tools. Common electric tools are electric drills, electric grinders, electric wrenches and screwdrivers, electric hammers and impact drills, concrete vibrators, electric planers. Accessories for every power tool: rotor, stator, gear, bearing, switch, carbon brush, carbon brush holder, carbon brush cover, power cord. It will not be repeated below.
①Electric drill: the main specifications are 4, 6, 8, 10, 13, 16, 19, 23, 25, 32, 38, 49 mm, etc., the number refers to the maximum diameter of the drill bit drilled on steel with a tensile strength of 390 N / mm . The maximum drilling diameter for non-ferrous metals, plastics and other materials can be 30-50% larger than the original specification.
②Electric grinder: a tool for grinding with a grinding wheel or a grinding disc. There are vertical electric grinders and electric angle grinders.
③Electric wrench and electric screwdriver: used for loading and unloading threaded joints. The transmission mechanism of the electric wrench is composed 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 toothed clutch transmission mechanism or a gear transmission mechanism, and the specifications are M1, M2, M3, M4, M6 and so on.
④Electric hammer and impact drill: used for drilling, slotting and shaving on concrete, brick wall and building components. The use of expansion bolts can improve the installation speed and quality of various pipelines, machine tools and equipment; 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 to generate impact power by gear running in, so the impact of the electric hammer More force.
⑤Concrete vibrator: Used for tamping concrete when pouring concrete foundation and reinforced concrete components to eliminate air holes and improve strength. The high-frequency disturbance power of the electric direct-connected vibrator is formed by the motor driving the eccentric block to rotate. The motor is powered by a 150Hz or 200Hz intermediate frequency power supply.
⑥Electric planer: It is used for planing wood or wooden structural parts. It can also be used as a small planer when installed on a bench. The cutter shaft of the electric planer is driven by a motor shaft through a belt.
Common bearing models for power tools: 606, 607, 608, 626, 627, 628, 629, 6000, 6001, 6003, 6004, 6200, 6201, 6202, 6203, 6303, 61907, 688 and other commonly used carbon brush models: 50 #, 408 #, 43 #, 44 #, 303 #, 21 #, 6M, etc.
