This is the simplest operation to understand. Face milling refers to when the milling tool’s axis is completely perpendicular to the workpiece’s surface. Face milling cutters have teeth on their periphery and face. The periphery teeth are used for cutting, while the face teeth are used for finishing. Face milling is further divided into end milling and side milling.
The face milling operation is used to create flat surfaces and contours on the finished product. Face milling is known for creating the highest quality end result.
Also known as surface or slab milling, plain milling refers to when the axis of the tool is parallel to the surface of the workpiece. Like face milling cutters, plain milling cutters also have teeth on the periphery which are used for cutting. These cutters can be narrow or wide. Narrow cutters are used to cut deeper, while wide cutters are used to cut larger surfaces. The machine operator can also go from using coarser toothed cutters to finer ones to control how detailed the final product ends up being.