👉 The case fluid, also known as lubricating oil or grease, is a crucial component in mechanical systems that reduces friction and wear between moving parts. It forms a protective layer that minimizes direct contact between surfaces, thereby enhancing efficiency and longevity of the machinery. This fluid can be applied internally or externally, depending on the system's requirements, and is essential for maintaining smooth operation, reducing heat generation, and preventing corrosion. Different types of case fluids are formulated to suit various applications, from automotive engines to industrial machinery, ensuring optimal performance and reliability.