Why is proper securing of workpieces critical in milling?

Proper securing of workpieces is critical in milling primarily because it prevents movement that can lead to inaccuracies during the machining process. When a workpiece is not securely fastened, vibrations and forces generated during cutting can shift the part, causing deviations in dimensions and surface finish. This lack of precision can result in parts that do not meet specifications, leading to waste and the need for rework. Ensuring that the workpiece is firmly held in place allows for consistent and accurate cuts, which are essential for producing high-quality components in machining operations.

While visibility, cleanup, and reducing tool wear are factors that may enhance the overall milling process, they are not directly related to the critical need for ensuring accuracy through proper workpiece securing.