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

Changing the direction of the current (in the commutator motor brush, also plays a role reversal)

Q:How about plug wires and cables for power tools?

Class II tools must be made of an insulated power plug, and the power plug is joined to a soft cable or cord to form a non renewable power plug. Class II tools only allow the use of non - renewable two pin power plug. The II class tools are marked with "back"". Class III tools, that is, secure voltage tools. Its rated voltage is not more than 50V, and the protection against electric shock depends on the power supplied by the safety voltage and no voltage higher than the safety voltage in the tool.

Q:How to detect the rotor of power tools?

Rotor inspection. 1) a self made short circuit device can detect damage. 2) you can detect with a pointer type multimeter.

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

The utility model has the advantages of light structure, small size, light weight, small vibration, low noise, flexible operation, convenient control and operation, convenient carrying and use, firmness and durability. Compared with hand tools, the utility model can increase labor productivity by several to several times; the utility model has the advantages of high efficiency, low cost and easy control.

Q:Compared to pneumatic tools, what are the advantages of electric tools?

At the same time, reversing operation, pneumatic tools, small size, high speed rotary speed, easy to adjust, no danger of fire, the air compressor can also be used in the house, is the best choice for sheet metal, paint, furniture manufacturing, auto hub processing, etc..

Q:What are the common rotors of power tools?

Electric drill: the main specifications are 4, 6, 8, 10, 16, 19, 23, 25, 32, 38, 13, 49mm and so on. Figures refer to the maximum diameter of the drill drilled on the steel whose tensile strength is 390N/mm. 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. The electric screwdriver adopts the embedded clutch, transmission mechanism or gear drive mechanism. The specifications include M1, M2, M3, M4, M6 and so on.

Q:How are hand powered tools classified into class I, class II, class III?

Class I protection against shock of the product depends not only on the basic insulation of the equipment, but also on additional safety precautions. The method is to connect the electrically conductive parts that may be touched with the protective wires in the installed stationary lines so that the accessible, electrically conductive parts are not electrified in the event of basic insulation damage. Such products are: hand-held power tools, mobile daily appliances, mobile mechanical and electrical equipment.

Q:What's the difference between a flashlight and an electric screwdriver?

As the mechanical component, the electric screw driver can work without the electric batch power supply, and the batch power supply provides the energy and the related control function for the electric screwdriver. Drive the motor. Since the parameters of the motor are different, the speed will be different when the power of the batch power supply is the same.

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

The series motor is usually used. The series motor is connected in series because the stator and rotor windings are connected together, so when the current is reversed, the magnetic field is reversed, so the torque direction remains the same. However, according to this principle, the motor works at 180 degrees after the torque is gone, so even the AC motor, but also need to reverse, in order to work like a DC motor.The rectifier also needs to be rectified if it is operated under the direct current. The rectifier bridge is very small. On the circuit board, there are four diodes close together, mostly rectifier bridge

Q:What power tools do you need for carpentry?

The main power tools used in carpentry are:1 、 air compressor, nail gun;2 、 the saw (big) is usually installed on the worktable;3 、 cutting machine, for small action cutting;4, electric screwdriver, screw on;5, pistol drill, for door, pipe, loose leaf, desktop power supply opening;