When it comes to milling cutters and drill bits, there's one main difference between the two: the angle at which the side edges are ground. While milling cutters have a clearance angle that allows for lateral cutting, drill bits don't. As a result, drill bits are only able to perform axial drilling and don't have the same versatility as milling cutters. So if you need to cut sideways, it's best to choose a milling cutter over a drill bit.
A milling cutter is a specialized rotary tool designed with one or more teeth for the purpose of milling. During operation, the cutter teeth efficiently remove material from the workpiece by taking intermittent cuts. These versatile tools are primarily used on milling machines to machine flat surfaces, create steps and grooves, shape various surfaces, and cut workpieces. To achieve a sufficient chip thickness/feed per tooth, it is crucial to accurately determine the appropriate number of teeth for the milling cutter required for each operation.