The hand drill is a drilling tool powered by an AC power source or a DC battery. It is a type of hand-held brand power tool . The working principle of the electric drill is that the motor rotor of the electromagnetic rotary or electromagnetic reciprocating small-capacity motor performs the magnetic field cutting work operation, drives the working device through the transmission mechanism, drives the gear to increase the power of the drill bit, so that the drill bit scrapes the surface of the object and better penetrates the object. .
    Hand drills are the most sold products in the power tool industry. They are widely used in construction, decoration, furniture, etc., for opening or piercing objects on objects. Some industries are also called electric hammers.
    The main components of the hand drill: drill chuck, output shaft, gear, rotor, stator, casing, switch and cable.
    Hand drill (pistol drill ) - a tool for drilling holes in metal materials, wood, plastics, etc. When equipped with a positive and negative switch and an electronic speed control device, it can be used as an electric screwdriver. Some models are equipped with a rechargeable battery that can work normally without external power supply for a certain period of time.
    Precautions
Hand drills should not be used to drill cement and brick walls. Otherwise, it is easy to cause the motor to overload and burn the motor. The key is that there is no impact mechanism in the motor and the bearing capacity is small.
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Hand drill work precautions