一般地，在使用过程中，如果发现螺栓梅花头吐不出来，说明扳手的套筒已经磨损太厉害了，梅花头卡在里面了，这时候应该更换新的套筒。
Generally, in the process of use, if it is found that the box head of the bolt can not spit out, it means that the socket of the wrench has been worn too much, and the box head is stuck in it. At this time, a new socket should be replaced.
一般地，在使用过程中，如果发现电机下面有火花，说明该换碳刷了。如果火花非常大，说明电机转子已经烧了。
Generally, in the process of using, if there is spark under the motor, it means that it is time to change the carbon brush. If the spark is very large, the motor rotor has been burned.
一般地，在使用过程中，如果发现电机转，而套筒不转，这说明某个齿轮磨秃了。
Generally, in the process of use, if the motor turns, but the sleeve does not turn, it means that a gear is bald.
一般地，在使用过程中，如果发现电机声音”嗡嗡...”地响，可能是电机轴承坏了。
Generally, in the process of using, if the motor sounds "buzzing...", it may be that the motor bearing is broken.
一般地，在使用过程中，如果发现电机声音异常，或者机械部分声音“霹雳咔嚓...”异响，那么应该马上停止使用，联系厂家销售代表。
In general, in the process of use, if you find that the motor sound is abnormal, or the mechanical part of the sound "Thunderbolt click..." abnormal sound, then you should immediately stop using, contact the manufacturer's sales representative.
一般地，如果通电后，而电机不转，请先检查电源及电源线和开关，确保线路部分正常。再检查碳刷是否短缺。再检查电机部分。
Generally, if the motor doesn't run after power on, please check the power supply, power line and switch first to make sure the circuit is normal. Check again if there is a shortage of carbon brushes. Finally, check the motor part.
一般地，维修时，拿到工具后，先外观检查，判断线路部分、碳刷、各个配件是否正常。再通电检查。
In general, when repairing, after getting the tools, check the appearance first to judge whether the circuit part, carbon brush and various accessories are normal. Power on again to check.
如果要打算拆开机器，请先断电，并取出碳刷，再开始拆机。
If you want to disassemble the machine, please turn off the power and take out the carbon brush before disassembling the machine.
1.冲击电动扳手：主要是初紧螺栓的，它的操作简单，就是对准螺栓扳动电源开关就行。
1. Impact electric wrench: it is mainly used to initially tighten the bolt. Its operation is simple, that is, to align the bolt and pull the power switch.
2.电动扭剪扳手：主要是终紧扭剪型高强螺栓的，它的使用就是对准螺栓扳动电源开关，直到把扭剪型高强螺栓的梅花头打断为止。
2. Electric twist shear wrench: it is mainly used to tighten the twist shear high-strength bolt. Its use is to align the bolt and pull the power switch until the quincunx end of the twist shear high-strength bolt is broken.
3.电动定扭矩扳手：既可初紧又可终紧，它的使用是先调节扭矩，再紧固螺栓。
3. Electric constant torque wrench: it can be used for both initial tightening and final tightening. Its use is to adjust the torque first and then tighten the bolts.
4.电动转角扳手：主要也属于定扭矩扳手的一种，它的使用是先调节旋转度数，再紧固螺栓。
4. Electric angle wrench: it mainly belongs to a kind of constant torque wrench. Its use is to adjust the degree of rotation first, and then tighten the bolt.
5.电动角向扳手：是一种专门紧固钢架夹角部位螺栓的电动扳手，它的使用和电动扭剪扳手原理一样。
5. Electric angle wrench: it is a kind of electric wrench specially used to fasten the bolts in the angle part of the steel frame. Its use principle is the same as that of the electric torsional shear wrench.
