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FAQ
- Is the motor of an electric tool the alternating current motor or the direct current motor?
- AC motor has become the most common motor because of the great development of AC power system.
- What kind of material does the power tool case have?
- In 1895, the German overtone produced the world's first direct current drill. The outer shell is made of cast iron and can drill holes in the steel plate 4mm. Then there was a three-phase power frequency (50Hz) electric drill, but the motor speed failed to break through the 3000r/min. In 1914, there was a single-phase electric motor driven by a series of exciting motors, and the motor speed was over 10000r/min. In 1927, the power supply frequency of intermediate frequency electric tool 150~200Hz, it not only has the advantages of high speed single-phase series motor, and has the advantages of simple structure, reliable three-phase motor, but because the need if current supply is limited.
- What safety problems should we pay attention to when using electric drills or hand-held power tools?
- The motor inlet shall be provided with a ground or zero connection device.(4) wearing shoes must be worn while wearing protective gloves such as insulating gloves.(5) each use of tools must be strictly checked.
- How about plug wires and cables for power tools?
- Class II tools, that is, insulated structures, all double insulated power tools. The specified voltage is over 50V, and the grounding device is not allowed in class II tools. Generally insulated enclosures. Generally speaking, the design of II tools made use of personal protective equipment operator to some reliable method in the tool, the tool has a double protective current, guarantee in the fault state, when the basic insulation failure, insulation and reinforced insulation provided by additional electric shock protection.
- What's the difference between a flashlight and an electric screwdriver?
- A flashlight is a drilling tool powered by alternating current or direct current batteries. It is a hand-held electric tool.The main components of a drill are a drill chuck, an output shaft, a gear, a rotor, a stator, a casing, a switch and a cable.Electric torch (pistol drill) -- a tool used for drilling metal, wood, plastics, etc.. When equipped with positive and negative reverse switch and electronic speed regulating device, it can be used as electric screwdriver. Some models are equipped with rechargeable batteries, which can work normally within a certain period of time without external power supply.
- Is BOSCH's power tools good or MAKITA's power tools?
- BOSCH electric tools three characteristics:1. 、 light structure, easy to carry and use.2. more than manual tools can increase labor productivity several times to several times;3., the utility model has the advantages of high efficiency, low cost, small vibration and easy control.
- 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.
- 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;