The main objective of the ELGI Rheology Working Group (a sub-group of the Test Methods Working Group) was to evaluate the applicability of rheological techniques to grease testing. A key area of concern for those participating was the measurement of the low temperature flow properties of lubricating greases - especially those being used in centralised lubricating systems. This paper will describe the test work done on six fully-formulated lubricating grease samples used in low temperature applications, showing how low temperature rheology tests can be used to compliment existing test methods, with examples of how the test can be used to determine the effect of various polymeric additives in modifying the low temperature rheology profiles for product development purposes.
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