What does NLGI measure?

NLGI stands for the National Lubricating Grease Institute, which recognizes a classification system for grease that primarily measures its consistency. This is critical because grease consistency affects its ability to stay in place and provide lubrication under various conditions. The measurement is represented by a numerical scale, where lower numbers indicate softer grease that can flow more easily, while higher numbers indicate firmer grease that is stiffer and provides more support for bearings and other components.

Understanding the consistency of grease is vital for ensuring compatibility with the machinery it is used in, as different applications may require specific grease consistencies for optimal performance. Therefore, the NLGI classification helps technicians select the right grease for specific operational needs, which is essential in maintaining machinery reliability and performance.