Low Temperature Effects on Grease
Low-temperature effects: If the
temperature of a grease is lowered enough, it will become so
viscous that it can be classified as a hard grease.
Pumpability suffers and machinery operation may become
impossible due to torque limitations and power requirements.
The temperature at which this occurs depends on the shape of
the lubricated part and the power being supplied to it. As a
guideline, the base oils pour point is considered the
low-temperature limit of a grease.