Cutting Fluids introduces the role of liquids and coolants used during machining to improve performance, extend tool life, and protect both the workpiece and the machine. These fluids serve multiple purposes: they reduce heat, minimize friction, flush away chips, and help achieve better surface finishes. This section covers the different types of cutting fluids—such as oils, water-based coolants, and synthetic blends—as well as how they are applied in practice. Understanding when and how to use cutting fluids is essential for maintaining efficiency, improving part quality, and preventing damage during machining operations.