The　objective　of　this　work　is　to　study　the　influence　of　error　induced　by　gas　film　in　micro　scale　on　the　static　and　dynamic　behavior　of　a　shaft　supported　by　the　aerostatic　bearings.　The　static　and　dynamic　balance　models　of　the　aerostatic　bearing　are　presented　by　the　calculated　stiffness　and　damping　in　micro　scale.　The　static　simulation　shows　that　the　deformation　of　aerostatic　spindle　system　in　micro　scale　is　decreased.　For　the　dynamic　behavior,　both　the　stiffness　and　damping　in　axial　and　radial　directions　are　increased　in　micro　scale.　The　experiments　of　the　stiffness　and　rotation　error　of　the　spindle　show　that　the　deflection　of　the　shaft　resulting　from　the　calculating　parameters　in　the　micro　scale　is　very　close　to　the　deviation　of　the　spindle　system.　The　frequency　information　in　transient　analysis　is　similar　to　the　actual　test,　and　they　are　also　higher　than　the　results　from　the　traditional　case　without　considering　micro　factor.　Therefore,　it　can　be　concluded　that　the　value　considering　micro　factor　is　closer　to　the　actual　work　case　of　the　aerostatic　spindle　system.　These　can　provide　theoretical　basis　for　the　design　and　machining　process　of　machine　tools.　(C)　2017　Elsevier　Ltd.　All　rights　reserved.