The YZW type externally mounted electric roller is a new type of drive unit for various fixed belt conveyors, bucket elevators, winches, etc. It features a planetary cycloidal reducer structure internally, which allows the motor to be directly connected to the roller, offering advantages such as high load-bearing capacity, strong overload resistance, smooth transmission, low noise, long service life, easy maintenance, and safe and reliable operation. It meets various requirements for reverse brakes and rubber-lined options. The explosion-proof externally mounted electric roller has explosion-proof ratings of dⅠ, dⅡAT4, dⅡBTA. dⅠ is suitable for mines with methane or coal dust, dⅡAT4 is suitable for areas with I, II A T2～T4 group explosive mixtures, and dⅡBT4 is suitable for areas with I, II A, II B T2～T4 group explosive mixtures.