(1) First of all, according to your own needs, the difference is whether it is for home use or professional use. Usually, the difference between professional power tools electric miter saw for aluminum and wood and general household power tools is mainly in power. Professional power tools have higher power, and general household power tools. The power of the tool is small, the input power is also small and compact, and the highly integrated power tool is more convenient to use than the product with a large size and a single function. Therefore, try to choose power tools with rich functions, small size, simple structure and easy storage. When purchasing power tools, you need to buy power tools with clear outer packaging and no damage. Obvious shadows and dents, no scratches or bumps, the relevant paint is smooth and beautiful without defects, the surface of the whole machine is free of oil and stains, the handle of the switch is flat, the length of the wire and cable is generally not less than 2M The relevant signs of the power tool are clear and complete , parameters, manufacturers, qualification certificates, etc. are all equipped to hold the tool by hand, turn on the power supply, frequently operate the switch to make the tool start frequently, observe whether the on-off function of the tool switch is reliable, and whether it affects the on-site TV/fluorescent lamp, etc., thus Determine whether the tool is equipped with an anti-interference suppressor and run the power tool for 1 minute. Feel the vibration and observe whether the reversing spark and the air inlet are normal.

(2) Select a power tool whose noise is within the allowable range.

(3) Choose power tools that are easy to maintain and get accessories.

(4) Pay attention to the power supply voltage used when selecting power tools. Generally, hand-held power tools need to provide 220V commercial power as the energy drive, and do not connect to 380V industrial power, otherwise the machine will be damaged.