Tensile aluminum alloy chassis: With a special technology manufacturing, the characteristics are light weight, high strength, heat dissipation, anti-tensile strength, aesthetic appearance, and high-precision in bore. In order to avoid the waste in turning in a hole and time-consuming, it can be directly fitted in pressure with the stator thus can save up about 30% of th cost. It should be widely applied to the export of other industry supporting the use of motor such as electrical, power tools, vacuum pumps, steam-machinery and so on.