Abstract
This is a companion article to “Grease Pumpability” by Dr. Wyllie that appeared in our January/February issue. That article discussed the factors governing the flow properties of grease and stated how this data could be used to assess the suitability of systems for dispensing greases. The present article deals with work done on oil separation from greases subjected to pressure, especially in spring‐loaded grease cups and describes a special test unit for this work. The results show the effect of pressure and temperature and the greater resistance to oil separation of greases containing high viscosity oil.
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