The forging alloy steel wind power shaft is an important component that connects the fan fins and the fan base. The fan main shaft is hollow and the material of the fan main shaft is stainless steel. It is difficult to process the inner hole. The processing equipment for the fan main shaft is a deep hole drilling and boring machine. According to the characteristics of the fan main shaft Characteristics, the head of the deep hole drilling and boring machine needs to be raised. The main axis of a wind turbine has both radial and axial offsets. In fact, the axial offset of the main shaft is transmitted directly to the input shaft of the gearbox. Unless special arrangements are made for the radial clearance, axial clearance control and planet gear positioning of the spherical roller bearings, axial misalignment will have an adverse effect on the planet carrier support bearings in the gearbox.