Wheel drives for good quality made in China are the Hanson Company's special-purpose speed reducer which produces for the large-scale circular watering machine and the translation type watering machine, the merits are: Transmission steady, small noise, big transmission ratio, high efficiency, long life and so on, and may withstand the great torque and radial direction bearing capacity. According to the use, the units are divided into the electrical machinery speed reducer and the wheel speed reducer, the power input is 0.6-1.5HP, a speed reducer pair of axis drives two wheel speed reducers separately.