The term refers to a specific type of fitting used in lubrication systems. It is a small, metallic fitting designed to allow grease to be injected into a bearing or other point requiring lubrication with a grease gun. Typically featuring a spring-loaded ball valve, it permits grease to enter while preventing backflow, ensuring consistent lubrication and minimizing contaminant entry. An example of its use would be injecting grease into the wheel bearings of a vehicle, thereby reducing friction and preventing wear.
This fitting plays a vital role in equipment maintenance and longevity. Its implementation contributes to decreased friction, reduced wear, and extended service life for machinery and components. Historically, the introduction of centralized lubrication systems using these fittings represented a significant advancement over manual lubrication methods, improving efficiency and reliability in various industrial applications. These fittings also contribute to safety as they reduce the necessity to dismantle parts to lubricate them, minimizing the risk of damage and improper reassembly.
