Define “tool wear” in the context of CNC machining.

Tool wear refers to the gradual degradation of a cutting tool's effectiveness due to use. In CNC machining, as a tool is employed to cut or shape materials, it undergoes wear from the physical and thermal stresses involved in the machining process. Over time, this wear can lead to a reduction in the tool's cutting performance, precision, and overall lifespan. Understanding tool wear is critical for machinists because it impacts the quality of the machined parts, the efficiency of the machining process, and the costs associated with tool replacement or maintenance. Monitoring tool wear can help in implementing timely interventions, such as tool replacement or sharpening, which can enhance productivity and ensure consistent machining results.