The main difference between a milling cutter and a drill bit is: the side edge of the milling cutter is ground with a clearance angle, so it can be cut sideways. The side edge of the drill bit has no clearance angle, so it cannot be laterally cut for axial drilling.
Milling cutter: is a rotary tool with one or more teeth for milling. When working, each cutter tooth cuts off the allowance of the workpiece intermittently in turn. Milling cutters are mainly used for machining planes, steps, grooves, forming surfaces and cutting workpieces on milling machines. To ensure that a sufficiently high average chip thickness/feed per tooth is used, it is necessary to correctly determine the number of teeth of the milling cutter suitable for the operation.
