Dropping Point

Glossary Term

Definition and Purpose

The dropping point of a lubricating grease is the temperature at which it becomes fluid enough for a drop to separate from a sample under test conditions. This characteristic is determined using standardized tests such as ASTM D 2265. It is important to note that the dropping point is distinct from the melting point and should not be used to infer the maximum operating temperature of the grease. Instead, it serves as a specification in grease selection, although its relevance to actual service performance is limited.