What is the term for the rate at which the cutting edge of a tool degrades during machining?

The term that describes the rate at which the cutting edge of a tool degrades during machining is referred to as tool wear. Tool wear encompasses various mechanisms through which the cutting edge experiences physical deterioration, leading to decreased effectiveness and precision in the machining process. Factors contributing to tool wear include friction, heat generated during cutting, and the material characteristics of both the workpiece and the tool.

Understanding tool wear is crucial for machinists and engineers as it helps in selecting the right tools, optimizing machining parameters, and scheduling maintenance or tool replacements. It directly impacts the quality of the finished product, production efficiency, and overall cost-effectiveness.

The other options serve different purposes in manufacturing and machining. Cutting speed refers to the speed at which the tool moves through the material and affects the efficiency of the cutting process. Feed rate is the distance the tool advances during a machining cycle, impacting both surface finish and material removal rate. Edge life, while somewhat related, typically refers to the total lifespan of the tool's cutting edge rather than the rate of its degradation. Thus, tool wear specifically addresses the ongoing process occurring during machining that leads to wear and tear on the cutting edge.