FUNCTIONS OF A GREASE
A satisfactory grease for a given application must:
Reduce friction and wear in the machine element being lubricated under various operating conditions.
Protect against rust and corrosion.
Prevent dirt, water and other contaminants from entering the part being lubricated.
Maintain its structure and consistency during long periods of use.
Permit free motion of moving parts at low temperatures and pump freely at those temperatures.
Have suitable physical characteristics for the method of application and retain those characteristics during storage.
Be compatible with Elastomer seals and other materials associated with the parts being lubricated.
Tolerate or resist some degree of moisture contamination without significant loss of performance.
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