What is a narrow disk-like milling cutter with cutting edges on its outside known as?

The term that accurately describes a narrow disk-like milling cutter with cutting edges on its outside is the shell mill. Shell mills are designed to hold multiple cutting edges along the periphery of the disk, making them particularly effective for various machining operations, especially when removing larger amounts of material from the workpiece.

Shell mills are versatile tools often used in horizontal milling machines and are capable of executing a wide range of cutting operations. Their construction allows for larger cutting diameters than traditional end mills, making them suitable for face milling and generating flat surfaces, contours, and slots. The design maximizes cutting efficiency, allowing for effective performance in both roughing and finishing operations.

While end mills, side mills, and slab mills serve specific purposes in the milling process, they do not fit the description provided as precisely as shell mills do. End mills are typically shorter and have cutting edges primarily at the tip for vertical and angled cuts. Side mills are used for performing side milling operations but lack the same disk-like shape. Slab mills, while similar in concept to shell mills, usually feature a wider and flatter blade design, which does not align with a narrow disk-like structure. Thus, the correct identification of a narrow disk-like milling cutter with cutting edges on its outside