Q:What's the role of carbon brushes in electric tools?

Carbon brush specific function1. the external current (excitation current) is added to the rotor by carbon brush (input current);2., the static charge on the big shaft is introduced into the earth (carbon brush) through the carbon brush (output current);3. lead the main shaft (ground) to the protection device for rotor ground protection and measure the positive and negative voltage of the rotor;

Q:What material does the power tool housing fit?

Electric drill: the main specifications are 4, 6, 8, 10, 13, 16, 19, 23, 32, 38, 49mm and so on. The figures refer to the steel whose tensile strength is 390N/mmThe maximum diameter of a drill drilled on a material. For non-ferrous metals, plastics and other materials, the maximum drilling diameter is comparable to the original specifications of 30 to 50%.Electric grinding machine: a tool for grinding with a grinding wheel or millstone. A vertical electric wheel and electric angle grinder.Electric wrench and electric screwdriver: used for loading and unloading threaded fittings. The driving mechanism of the electric wrench is composed of a planetary gear and a ball screw groove impact mechanism. Specifications are M8, M12, M16, M20, M24, M30 and so on. An electric screwdriver adopts a clutch, a transmission mechanism, or a gear drive mechanismThere are M1, M2, M3, M4, M6 and so on.

Q:What's the name of an electric tool for riveting screws into wood? Not understand!

If the factory is assembled, use an electric screwdriver! Only suitable for twisting small screws! Because the torque itself is not large! Like you twist it on a wood, use a Zigong drill, or a rechargeable drill! Because of these two belts with adjustable torque! Unlike an electric drill, it always turns that way! This torque is automatically separated by reaching a certain torque! If you screw a big screw, it's an electric wrench!

Q:How are the I, II, and III classes of power tools classified?

Class I. In addition to basic insulation, the device has an additional safety measure. There is no grounding terminal on the shell of class I equipment, but there is a grounding terminal inside, and the power cord with protective plug is drawn out from the equipment.Class ii. The device has dual insulation and insulation protection measures.Class III. The device relies on extremely low safety voltages to protect against electrical shocks.

Q:What other tools are there for the furniture except the pistol hole?

It is mainly used in construction, decoration, furniture industry, opening for objects or objects in the past, also known as hammer in some industries.Well, there are more drilling tools on the market now.

Q:Which is good between pneumatic tools and power tools?

The use of pneumatic tools:1., the air is easy to obtain, and the work pressure is low, the used air can be discharged locally, without the need to recover the pipeline2. gas viscosity is small, flow resistance loss is small, easy to central gas supply and long-distance transportation3. pneumatic actuator, high movement speed4. the pneumatic system has a strong adaptability to the environment. It can work reliably in a wide temperature range, humid and dusty environment, with a slight leakage, no pollution to the environment, no fire and explosion hazards, and safe use5., simple structure, convenient maintenance and low cost6. long life of pneumatic components7. pneumatic actuators of the hydraulic output than small, fast, strong adaptability, can exercise in the flammable, explosive, heavy, damp, the impact of the harsh environment, no environmental pollution, long service life, simple structure, easy maintenance, low price.

Q:What devices must be available for all hand held electric tools?

Hand held electric tools, insulation measures are in good condition, must be equipped with qualified leakage protection device, forbid to change the power cord and plug, use special flow switch box.

Q:What are the commonly used rotor types for power tools?

Electric tools commonly used bearing type: 606, 607, 608, 626, 627, 628, 629, 6000, 6001, 6003, 6004, 6200, 6201, 6202, 6203, 6303, 61907, 688 commonly used carbon brush models: 50#, 408#, 43#, 44#, 303#, 21#, 6M etc.

Q:What safety problems should we pay attention to when using electric drills or hand-held power tools?

All conducting parts must be well insulated,

Q:Is the motor of an electric tool the alternating current motor or the direct current motor?

Compared to the AC motor and DC motor, because there is no commutator (see DC motor commutation), therefore has the advantages of simple structure, convenient manufacture, relatively strong, easy to make high speed motor, high voltage, high current, large capacity. The coverage of AC motor power greatly, from a few watts to several 101000 watts, even millions of kilowatts.