What characterizes a milling machine in metalworking?

A milling machine is characterized by its use of a rotary cutter to remove material from the workpiece. This process allows for a variety of shapes and features to be created on the material, such as pockets, grooves, and complex profiles. The rotary motion of the cutter enables efficient material removal, making milling machines versatile tools in metalworking applications.

In contrast to other methods listed, a milling machine is not primarily designed for turning materials, which is the role of a lathe. While grinding is a process associated with shaping materials, it typically involves a different set of equipment, known as grinders, which are used for finishing surfaces rather than removing material in bulk. Additionally, a milling machine is not restricted to drilling; it can perform various operations, including drilling, but its primary function is more expansive than just drilling. This multifaceted capability is what makes the milling machine an essential tool in the metalworking industry.