Technicians monitor the cup. The exact temperature recorded on the thermometer when the first drop falls through the bottom hole is officially cataloged as the dropping point.
The dropping point is a critical physical indicator in tribology (the study of friction and wear). It indicates the specific temperature at which a grease passes from a semi-solid to a liquid state under controlled conditions. 🔍 What is the Dropping Point? gost 6793
Lubricating greases are engineered by combining a base oil with a thickener and performance additives. The thickener holds the oil like a sponge. As grease is heated, it reaches a temperature where the thickener can no longer retain the oil. Technicians monitor the cup
Complex or polyurea greases intended for extreme operating environments will feature dropping points clearing 230 °C to 250 °C. 🌍 International Equivalents It indicates the specific temperature at which a
(PDF) Recent progress in high-temperature greases - ResearchGate
These multi-purpose greases boast a far higher dropping point, generally exceeding 180 °C under GOST 6793.
A small grease sample is packed into a specialized metal cup with a standardized hole at the bottom.