Advantages of Milling Impellers Compared to Ordinary Cast Impellers

SHOUYUAN Power Technology has been providing high-quality turbochargers and parts for various vehicles. One of our major features is that most of our turbochargers support milling impellers. Compared with the impellers originally processed by other processing methods (such as casting), the impellers processed by milling have significant advantages in many aspects, as follows:

1. Higher dimensional accuracy: Milling processing is usually carried out on high-precision CNC machine tools. Through precise programming and control of tool paths, it can be processed strictly in accordance with the requirements of the design drawings, and a very small tolerance range can be achieved. For example, for some turbocharger impellers that have extremely high requirements for blade thickness and angle accuracy, milling processing can control the error within a very small range, thereby ensuring that the aerodynamic performance of the impeller reaches the best state. The traditional casting process is affected by factors such as mold accuracy and cooling shrinkage, and the dimensional accuracy is relatively difficult to control.
2. Better surface quality: Milling processing can obtain a very smooth surface, and the impeller surface roughness is low. This helps to reduce the friction resistance of the airflow on the impeller surface and improve the efficiency of the impeller. For example, in the turbine impeller of an aircraft engine, a smooth surface can reduce energy loss and improve the overall performance of the engine. In contrast, the surface of a cast impeller may have defects such as sand holes and pores, and additional post-processing processes such as grinding are required to improve the surface quality.
3. Greater design flexibility: Milling can achieve complex geometric shapes and fine structural designs. For some impellers with special aerodynamic requirements, such as asymmetric blade design, complex twisted blade shape, etc., milling can be achieved more easily. This allows engineers to design impellers with better performance according to different application requirements. When casting processes are used to manufacture impellers with complex shapes, they are often limited by processes such as mold manufacturing and demolding.
4. Better material performance: During the milling process, since the material is removed to form the shape, defects such as casting stress and shrinkage will not be generated inside the material like casting. This helps to give full play to the mechanical properties of the material itself and improve the strength and reliability of the impeller. For example, for some impellers made of high-strength alloy materials, milling can avoid performance degradation caused by casting defects and ensure that the impeller can work stably under high-speed rotation and high temperature and high pressure environments.
5. Better quality stability: The milling process is highly controllable, the parameters of each processing can be accurately set and repeated, and the consistency and stability of product quality are high. In contrast, the casting process is affected by many factors, such as temperature control, casting speed, etc., and the product quality may fluctuate to a certain extent.

Therefore, for the reasons mentioned above, we recommend that you try using our milling impellers in your turbochargers when conditions permit. As a leader in the aftermarket turbocharger field, our factory will assist you in providing milling impellers that are suitable for different models of turbochargers. Popular models like Cummins HX55W, Iveco HE551W, Caterpillar S3B, Komatsu S400, Mitsubishi L300, MAN K29, etc.are all in our inventory. So, if you have any demand for turbochargers and parts,  and we will give you feedback as soon as possible!