👉 Overhead fluid, also known as overhead lubrication or oil film lubrication, is a method of reducing friction and wear between moving parts in mechanical systems. It involves introducing a lubricant, typically oil or a specialized fluid, into the space above or between two surfaces that would otherwise come into direct contact. This fluid forms a thin film that separates the surfaces, preventing metal-to-metal contact and thereby reducing friction, heat generation, and wear. This method is commonly used in applications like bearings, gears, and other rotating machinery to enhance efficiency and longevity.