What Is the Dropping Point of Lubricating Grease?
The dropping point is an important indicator of the thermal behavior of lubricating grease. Understanding this parameter helps prevent confusion between dropping point and maximum continuous operating temperature.
Temperature affects the consistency, structural stability and performance of lubricating grease. The dropping point is therefore an important parameter in grease technical data sheets. However, selecting grease for a specific application requires consideration of other properties and actual operating conditions.
The dropping point is generally the temperature at which the first drop of liquid falls from a test apparatus under specified test conditions. It describes the grease’s thermal behavior during that test; it does not directly establish the maximum temperature at which the grease can operate continuously and safely in machinery.
Practical selection also depends on base oil type and viscosity, thickener chemistry, mechanical stability, water resistance, load, speed and the temperature at the lubrication point. For high-temperature applications, users should consult the manufacturer’s technical data sheet for the recommended operating temperature range and verify compatibility with the equipment.
The dropping point is useful as one comparison parameter, but it should not be used alone to determine high-temperature suitability. Understanding the distinction between a laboratory test result and actual operating conditions supports more appropriate grease selection and maintenance.
