Side milling is among the common types of milling processes used to cut the sides of a workpiece. It primarily utilizes the periphery, or side edges, of the cutter to remove material. Generally, side milling is useful to cut profiles, slots, and vertical walls in the workpiece.
During the Side Milling process，due to the cutting forces acting perpendicular to the tool axis, machinists need to exercise care in managing the cutting load on the tool. Excessive cutting forces or very deep cuts can cause tool deflections and even breakage.