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FAQ
- 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)
- 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.
- 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?.
- 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?
- The rotor has no force. Most of them are burned out of the rotor, and many rotors can be removed if they are removed. One can distinguish, such as commutator commutator shedding, excessive wear. Have the commutator between electrodes and arc erosion serious. Rotor winding, inhaled by the fan, damage caused by damage to the rotor.
- What is the working principle of power tools?
- An electric motor that rotates by alternating current is called an alternating current motor. There are many kinds, mainly:A, the series excitation motor - rectifier DC generator for AC motor, namely into this kind of motor, at the same time shift due to alternating current in the magnetic field and the armature circuit, therefore, the direction of the torque constant remains unchanged, the machine is kept turning. This kind of motor can also be used as AC and DC, so it is also called universal motor". Vacuum cleaner, sewing machine and other household appliances, etc..B, an induction motor -- a device that rotates the rotor in the rotating magnetic field and causes the rotor to rotate due to the action of eddy currents. Rotating magnetic field is not caused by mechanical method, but by alternating electric flux in the number of electromagnets, so that the magnetic properties of the cycle of change, can be seen as a rotating magnetic field. Usually three-phase induction motor (with three pairs of magnetic poles) is used. The motion of the DC motor is just the opposite of the direct current generator. In the generator, the induced current is formed by the induced electromotive force, so they are in the same direction. In an electric motor, the current is supplied by an external power supply, and the direction of the induced electromotive force is in opposition to the armature current I.C and synchronous motor - the motor with the armature from one pole to the second pole, just the same as the current that turns into the current. This kind of motor cannot start on its own and must be operated by another motor or special auxiliary winding so that the proper frequency can be reached before it can be switched on. If the load changes and the speed changes, the speed is not in line with the AC frequency, so that the pace of disturbance, tend to stop or cause damage. Due to restrictions, it is not widely used.
- How are the I, II, and III classes of power tools classified?
- The popular point is that:The 1 type of tool is metal housing with ground wire.The 2 type of tool is the insulated housing.The 3 type is low voltageOfficial point of explanation can be searched for power tool category ~!
- Is there an electric tool for screwing bolts? It's bolts, not screws
- Yes, electric wrench.An electric wrench is a wrench powered by a power source or battery. It is a tool for tightening bolts. It is mainly divided into impact wrench, torsional shear wrench, fixed torque wrench, angle wrench, angle spanner, hydraulic wrench, torque wrench, rechargeable electric wrench.