Which of the following defines "depth of cut" in milling?

The definition of "depth of cut" in milling specifically refers to the thickness of material that is removed in a single pass of the cutter over the workpiece. This measurement is crucial in machining operations as it affects the efficiency of the milling process, the finish of the workpiece, and the overall wear on the milling tool.

When the depth of cut is properly managed, it can lead to optimal material removal rates while minimizing tool wear and preserving the integrity of the workpiece. Conversely, if the depth of cut is too shallow, production may be inefficient, and if it's too deep, it could lead to tool breakage or poor finish quality.

The other options do not accurately reflect the definition of depth of cut. The speed of the milling cutter is associated with the feed rate and cutting conditions, cumulative material removal across multiple passes relates to the total machining strategy rather than a single operation, and the maximum width of the cutter pertains to the cutter's diameter rather than the depth at which it engages with the material. Thus, focusing on the thickness of material removed in a single pass as the definition of depth of cut provides clarity on its role within the milling process.