What is the purpose of a caliper in milling processes?

In milling processes, the purpose of a caliper is primarily to measure the dimensions of the workpiece accurately. Calipers are essential tools that can determine internal and external dimensions, as well as depths and steps. By providing precise measurements, calipers enable machinists to ensure that the workpiece meets specified tolerances and fits properly with other components in an assembly.

This measurement capability is critical in milling, where accuracy can significantly affect the final product's functionality and quality. If dimensions are not measured correctly, it could lead to parts that do not fit together or perform as intended, resulting in wasted materials and time. Using a caliper helps ensure that all machining processes adhere to the required specifications, promoting efficiency and quality in the milling operation.

In contrast, the other options describe functions that do not align with the primary goal of a caliper. Cutting the workpiece, cleaning the surface, or increasing machining speed are tasks handled by different tools or processes within milling operations.