Q:Why hand grinding sand turbine, electric drill, impact drill and other power tools plug is two, plug is not three plug

Hand-held power tools, in the past there are many plugs with three eyes, the purpose is that in case the leakage can pass through the grounding wire, the current will be introduced into the earth, and the protection of the human body.In practical applications, because of the mobile work and the use of temporary power supply, and the grounding of the sockets in many places is not reliable, it is not ideal to implement the leakage protection by grounding.

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 kind of power tools are hand drills? 1, 2 or 3?

I class: in the prevention of electric shock protection, in addition to relying on basic insulation, but also the need for zero protection.Class II: the tool itself has double insulation or insulation without the need to protect the ground.Class III: Powered by a secure, ultra low voltage power supply, no voltage higher than the safety supply voltage is generated within the tool.The above is the classification of insulation categories.

Q:What power tools are used as cage birds?

If you want to do copper ornaments, you should distribute the grinding belt, flexible shaft, tool set. You can also buy a flashlight with a flexible shaft, coupled with some tools, you can also head. Bakelite milling can also be used instead of drill, a horizontal milling type fixed electric drill and milling cutter. What depends on your workload?.

Q:What are power tools?

Electric tools divided into many categories: hammer drilling, grinding, sawing, cutting, assembling, charging, cutting and so on, each class has a lot of varieties.

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

Nowadays, class I hand held power tools are virtually discontinued. The class II hand-held electric tools are widely used. Class II hand held electric tools are generally used on special occasions such as wet environments, metal containers, etc..

Q:What are the commonly used rotor types for 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.The hammer and drill: used for concrete, brick and building components on drilling, slotting, dehairing. With expansion bolts, installation can improve the speed and quality of pipeline, machine equipment; impact hammer principle is to rely on the internal movement of the piston impact force, impact principle of impact drill is running in gear impact force, so the impact hammer is greater.

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.

Q:What is the working principle of power tools?

A direct current motor called a direct current motor. Due to the magnetic field circuit and armature circuit of the different links, can be divided into series motor, motor, compound motor;

Q:Power tools are power tools?

General refers to power tools, and in some cases pneumatic tools are used.