First, the coaxial helical gear of the 12v electric motor has compact size, good-looking in shape, and strong in overload. Second, it has transmission ratio of fine classification, wide selection range and speed type spectral width. Third, 12v electric motor is with low energy consumption, good performance, reducer efficiency of ninety-six percent, less vibration and low noise. Fourth, 12 volt electric motor has good versatility, easy to use, low maintenance costs, especially the production line which only a few of the spare parts can guarantee the normal production maintenance. Fifth, 12 volt electric motor with new type of sealing device has the characteristics of good protection, environmental adaptability and can be in a corrosive, wet and other harsh environment to carry continuous work. Finally, 12v electric motor can be matched with ordinary Y series, Y2 series, lifting motor, anti riot motor, brake motor, motor, DC motor, outdoor special motor and other types.