The bearings on rotor are very important for motor which performance and life will affect the motor performance and life directly. Meanwhile, it is also very important to improve the assembly quality for bearing and its related parts in motor for keeping motor running steadily. A new type of combined bearing was introduced. It had good performance in motor with bigger selfalignment and bigger axial load carrying capability. This design also showed great convenience for assembly. The motor life can be greatly improved by applying this innovative design.