High accuracy static pressure main shaft

The utility model relates to a high accuracy static pressure main shaft, including main shaft body, radial centering shaft hold, axial footstep bearing and oil feeding system, radial centering shaft holds and comprises main shaft body and preceding, rear end bearing housing, the front end bearing housing comprises first endotheca and the first overcoat tight fit, the rear end bearing housing comprises second endotheca and the second overcoat tight fit, the equipartition has four pressure -bearing grooves on first and second endothecas and the main shaft complex hole, there is a flow controller in every pressure -bearing inslot portion, the annular on oil feeding system warp first, the second of the ten heavenly stems overcoat is four flow controller fuel feeding, axial footstep bearing comprises the flange terminal surface of main shaft body left end and front end bearing housing and fastening lock sleeve at rear portion in the main shaft that radial centering shaft held, and footstep bearing's pressure -bear