“Milling is actually a type of subtractive manufacturing in which a milling cutter removes material from the workpiece to achieve the required shape.”
For your information, the first milling machine was invented by Eli Whitney in 1818 to manufacture rifles for the U.S. government. Well! The working principle of all types of milling machines is generally the same, like just the cutter being rotated against the stationary or moving workpiece. Thus the material is removed layer by layer to shape it as you wish.
