👉 The QC fluid, or Quality Control Fluid, is a specialized lubricant used in precision engineering and machining processes to maintain optimal surface finish and tool life. It is designed to minimize friction, heat generation, and wear by forming a protective film between the cutting tool and the workpiece. This fluid is typically applied in thin layers, ensuring that it does not contaminate the surface or interfere with the machining process. The QC fluid's composition and properties are carefully tailored to specific materials and operating conditions, making it essential for achieving high-quality results in applications requiring extreme precision and durability.