Basic scope of use of end mills End face milling: suitable for operations with small plane ranges and cutting depths. The surface of the machined parts is relatively "rough and uneven". Keyway machining: Generally speaking, producing a high-quality keyway requires at least two milling cutters. Crescent keyway machining: Generally speaking, this process requires a milling cutter to operate using the full feed feed method. Special cutting: including milling of conical surfaces (such as "T" shaped grooves) and machining of dovetail grooves. Fine profiling cutting: Complete the contour of the inner/outer surface on a workpiece with parallel sidewalls. Mold hole processing: roughly including the processing of the concave surface of the steel mold and fine processing. The processing of concave molds requires three-dimensional orientation. Ball milling cutters are more suitable for this operation.