"AC Fan" after bearing and base installation, the installation also need to check some of the performance of the centrifugal fan, centrifugal fan when performed alignment check, misalignment fan shaft and motor shaft: Radial position shift should not exceed 0.05 mm, the inclination should not exceed 0.2 / 1000. Rolling centrifugal fan assembly, two bearing frame bearing bore misalignment can be installed after the rotor to rotate the flexible prevail. Mainly in the installation of our attention to these details, will be able to install the bearing housing and the base is more accurate, more conducive to the fan effect in use.