What is the role of coolant in CNC machining?

Coolant plays a crucial role in CNC machining primarily by dissipating heat and reducing wear on both the cutting tool and the workpiece. During machining operations, the friction generated between the cutting tool and the material can produce significant amounts of heat. This heat can lead to thermal expansion of the workpiece and the cutting tool, potentially resulting in inaccuracies and premature tool wear.

By using coolant, machinists can effectively manage this heat buildup, allowing for improved machining performance. The coolant helps to maintain a consistent temperature, which minimizes the risk of damage to both the workpiece and the tool, resulting in enhanced precision and extended tool life. Additionally, the coolant can assist in flushing away chips and debris from the cutting area, which further contributes to reducing wear and improving surface finish on the machined part. Therefore, the correct choice highlights the coolant's essential functions of maintaining optimal temperature conditions and prolonging the lifespan of tools during CNC machining processes.