What effect does coolant have during CNC machining?

Coolant plays a crucial role in CNC machining by aiding in chip removal and providing lubrication for the cutting tool. When machining metals and other materials, friction is generated between the tool and the workpiece, producing heat and leading to the formation of chips. The application of coolant helps to wash away these chips, preventing them from interfering with the cutting process and causing tool wear or workpiece damage.

Additionally, the lubrication provided by the coolant reduces friction between the tool and the workpiece, which can enhance tool life by minimizing wear. This reduction in wear is beneficial for maintaining the precision and effectiveness of the machining operation.

By addressing heat management, chip removal, and lubrication, coolant significantly enhances the efficiency and effectiveness of the CNC machining process, which is why this option is the most appropriate choice.