What is the function of a coolant in CNC machining?

The function of a coolant in CNC machining primarily focuses on the reduction of friction and heat buildup during the machining process. When cutting tools engage with materials, friction is generated, which can lead to excessive heat. This heat can adversely affect both the workpiece and the cutting tool, potentially causing damage or degradation of their properties.

Coolants help to dissipate this heat, maintaining optimal operating temperatures which extend tool life, prevent thermal distortion of the workpiece, and ensure machining accuracy. Additionally, coolants can also aid in the removal of chips and swarf from the cutting zone, further enhancing tool performance and surface finish.

While enhancing the decorative appearance of the workpiece, assisting in tool calibration, and improving the quality of the CNC machine are important considerations in manufacturing processes, they do not pertain directly to the primary role of coolant in machining operations.