National Lubricating Grease Institute (NLGI)

The National Lubricating Grease Institute (NLGI) is a global organization dedicated to advancing the knowledge and use of lubricating greases. It provides industry standards, such as a grading system to classify grease consistency—ranging from semi-fluid to solid—based on testing methods. NLGI supports research, education, and collaboration among manufacturers, engineers, and users to improve lubrication practices. Its standards help ensure grease performance and compatibility across various applications, contributing to the reliability and efficiency of machinery and equipment.