Micro slot milling micro channels in a single pass vs two step upmilling has the benefit of higher productivity. This problem is approached by showing the theoretical benefits of more than two cutting edges. The acceptable feed per tooth and cutting depth at the maximum undeformed chip thickness for ductile-brittle transition and the benefit of upmilling versus downmilling and other parameters (tool wear, tool trajectory, tool deflection, air pressure/cutting oil) have been assessed by micro and macro-geometrical analyses versus surface finish/transparency, form error of the cross section shape in the micro scale (aspect ratio, tolerances, parallelism, flatness, straightness), chipping and productivity. Quantitative correlation between transparency and roughness is also proposed to estimate the acceptable amount of brittle mode.

单通道微铣和两步上铣的微槽铣具有更高生产率的优势。通过显示两个以上切削刃的理论优势来解决该问题。对于微细的脆性过渡，在最大未变形切屑厚度下可接受的每齿进给量和切削深度，以及通过微铣刀评估了铣削与铣削以及其他参数（刀具磨损，刀具轨迹，刀具偏斜，气压/切削油）的优势以及宏观几何分析与表面光洁度/透明度之间的关系，形成微观尺度上的横截面形状误差（纵横比，公差，平行度，平面度，直线度），切屑和生产率。还提出了透明度和粗糙度之间的定量相关性，以估计脆性模态的可接受量。