What does NLGI stand for in relation to grease consistency?

NLGI stands for the National Lubricating Grease Institute, which is a key organization in the lubrication industry. This institute is responsible for establishing the scale used to classify the consistency of lubricating greases. The NLGI consistency number ranges from 000 (very soft) to 6 (very hard), providing a standardized method for users to compare and select greases based on their textural properties.

Understanding this classification is important for applications where the performance characteristics required from grease—such as its ability to stay in place under operational conditions—depend significantly on its consistency. The NLGI's role in developing these standards helps ensure that machinery and equipment are lubricated effectively, reducing wear and promoting longevity.