What machining process is used to create round holes in a workpiece?

Drilling is the machining process specifically designed to create round holes in a workpiece. In this process, a rotating cutting tool, known as a drill bit, is advanced into the material, removing material in a cylindrical shape to form the hole. This method is particularly effective for producing holes with precise diameters and depth, making it a fundamental operation in machining and manufacturing.

Turning primarily involves rotating a workpiece against a fixed cutting tool to shape it, generally creating external cylindrical forms rather than holes. Milling utilizes rotary cutters to remove material from the surface, typically creating flat or contoured surfaces rather than round holes. Grinding is a finishing process that uses an abrasive wheel to improve surface quality or size, rather than cutting new holes. Thus, when focusing on the creation of round holes specifically, drilling is the most appropriate and efficient method.