1) throwaway inserts indexable carbide inserts for milling cutter is mainly flat, while roughing cutter diameter smaller election, when precision milling cutter diameter larger election, when allowance is large and more than when uneven amount, choose a small number of the tool diameter, otherwise it will cause too deep because knives marks affect the processing quality of the workpiece.
2) When the three-dimensional surface or contour of the workpiece becomes oblique, often using ball-cutter, circular cutter, drum-shaped cutter, taper cutter, disc cutter.
3) high-speed steel end mills used for machining bosses and grooves. If allowance is small, high surface roughness, the choice of inlaid ceramic inserts CBN blade or blade end mill.
4) rough rough surface or hole can be used carbide inserts corn milling heavy cutting.
5) high precision machining grooves, the choice of a smaller diameter than the width mills, milling the middle part of the first, and then use both sides of the milling cutter radius compensation slot.