In relation to CNC milling, what does "feed and speed" refer to?

In the context of CNC milling, "feed and speed" specifically refers to the operational parameters that dictate how a milling tool interacts with the workpiece. The feed rate indicates the distance the milling tool advances into the material per revolution or per unit of time, essentially how quickly the tool moves along the surface of the workpiece. Speed, on the other hand, refers to the rotational speed of the tool or spindle, typically measured in revolutions per minute (RPM).

Understanding and optimizing the feed rate and spindle speed is crucial for achieving efficient cutting, maintaining tool life, and ensuring the quality of the finished part. Different materials and cutting conditions require specific adjustments to both parameters to achieve the best results. By identifying the feed rate and speed, machinists can enhance productivity while reducing the potential for tool breakage or poor surface finish.