The micro ball end milling technology is very often applied to manufacturing of precise parts with a complex geometries. Nonetheless, the problems regarding the obtained surface finish in a terms of progressing tool wear are still insufficiently investigated. This study is focused on evaluation of relations between the progressing tool wear and the generated vibrations, as well as machined surface roughness during micro ball end milling of inclined surface. The conducted research has been focused on micromilling of a hardened tool alloy 1.2713 steel and involved the on-line measurements of workpiece vibrations, and the post-machining inspections of surface roughness and tool wear. Additionally, the analytical dependencies between the ramping milling strategy direction and the maximum effective cutting speed for a micro ball end mill were determined. The obtained results presented that the progressing tool wear, mainly in the form of abrasion wear on the tool flank face and retraction of a cutting edge affected the linear growth of surface roughness height parameters, as well as induced a non-linear effect on micromilling vibrations. A differences in Rt parameter values were equal to even 220% between the cutting path of 45 m and 180 m.