What should be done if the workpiece begins to overheat during milling?

If the workpiece begins to overheat during milling, applying more coolant or adjusting the feed rate is the most effective response. When overheating occurs, it can lead to several issues, such as burnishing the workpiece surface, altering material properties, and potentially causing tool wear or failure. By increasing the application of coolant, you improve heat dissipation, which helps to maintain both the workpiece and tool at safe operating temperatures.

Adjusting the feed rate can also be beneficial. If the feed rate is too slow, the cutting tool has more time to generate heat without adequate material removal, leading to overheating. By increasing the feed rate, you enable the tool to move more quickly through the material, reducing the time each cutting edge spends in contact with the workpiece and thereby generating less heat.

This dual approach of enhancing coolant application and optimizing the feed rate directly targets the overheating issue without compromising machining quality or tool integrity.