According　to　the　increasing　needs　of　rotary　table　and　spindle　to　satisfy　high-precision　machining　requirements,　the　accuracy　of　rotary　table　and　spindle　becomes　an　important　issue　due　to　the　error　averaging　effect　of　hydrostatic　thrust　bearing.　The　objective　of　this　study　is　to　research　a　methodology　to　guide　the　precision　design　of　hydrostatic　thrust　bearing　in　rotary　table　and　spindle.　A　run-out　error　model　based　on　error　averaging　effect　is　established　using　the　Reynolds　equation,　pressure　boundary　conditions,　flux　continuity　equations　of　pad　and　dynamic　equations　of　shaft.　The　axial　run-out　error　and　angular　error　are　calculated　considering　perpendicularity　error　and　flatness　error　of　the　components.　The　simulation　results　show　that　the　two　perpendicularity　errors　between　axis　line　and　thrust　bearing　bushing　surface　have　same　direction,　and　the　axial　run-out　error　could　reach　to　the　maximum　values.　Also,　the　flatness　error　of　thrust　bearing　bushing　surface　has　a　big　influence　on　axial　run-out　error.　Following　the　outcomes,　the　precision　design　of　hydrostatic　thrust　bearing　was　conducted.　The　axial　run-out　errors　of　rotary　table　and　spindle　with　hydrostatic　thrust　bearing　were　experimentally　studied,　and　the　results　have　good　coherence　to　the　simulation　data.　The　run-out　error　model　is　demonstrated　to　be　an　effective　approach　to　guide　the　precision　design　of　hydrostatic　thrust　bearing　in　other　rotary　tables　and　spindles.