Laser Rangefinder Laser Rangefinder Mini Handheld Digital China Laser Rangefinder Transducer

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Laser Rangefinder Laser Rangefinder Mini Handheld Digital China Laser Rangefinder Transducer

Q: Grease for electric tools: Color lighter, indicating a temperature resistance is not good, there is resistance to extreme pressure and shear resistance and other properties are not good.

Q: What are the motors that are often used in hand held electric tools?: Most power tools are series excited motors with an electric brush inside.The motor has the characteristics of small size, high power and high speed.But it can not work for a long time, and some can be controlled by thyristor.

Q: How to distinguish between true and false vicese electric tools: Vicese professional power tools this year in the domestic electric tools industry visibility is high, although the manufacturers have not done a large-scale publicity campaign, in a few years, especially in the high-end power tools market can break the long-term by BOSCH and other brands of monopoly, it is rare.

Q: What's the function of the capacitor in the power tools?: You don't ask very clearly, I think you ask the capacitor is the starting capacitorAC electric tools to turn up, you need a rotating magnetic field, while the individual current single-phase motor can not form the rotating magnetic field, so the need for a starting capacitor to phase to phase current, the two winding of the generated nearly 90 Eve joy difference, to produce a rotating magnetic field. Household fans, for example

Q: Why use helical gears for power tools?: Good meshing performance. In the line of contact of helical gear teeth for line tilt and the axis of gear, gear engagement and disengagement began to be gradual, and stable transmission, low noise, and the meshing method also reduces the influence of manufacturing errors on transmission.

Q: What is the difference between mobile electrical equipment and hand-held power tools?: Portable electrical equipment corresponding to mobile electrical equipment.Hand held electric tools correspond to desktop power tools.

Q: The insulation resistance of two kinds of hand-held power tools is not less than: Low voltage electrical equipment and its connecting cables and two circuit insulation resistance should not be less than 1M ohms; in a relatively humid environment should not be less than 0.5M; the two circuit of the small bus insulation resistance should not be less than 10M. The insulation resistance of class I hand held electric tools should not be less than 2M.

Q: How to connect the sleeve head and the power tool?: The small sleeve head can be used as an electric screwdriver or an electric screwdriver or a speed regulating electric drill, and the middle part needs a converting device to be jammed, and a special socket head is directly clamped on the electric tool.

Q: What is the performance of power tools and how is life tested?: In the life test of power tools, periodic loading of single power tools is required, and electrical tools are tested for 48 to 72 hours at different load stages.

Q: Are the metal housings of the two types of power tools grounded?: Class II tools, that is, insulated structures, all double insulated power tools. Its specified voltage is more than 50VClass II tools are not allowed to set ground devices. Generally insulated enclosures.

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