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Technical Learning
Introduction
Vicosity
Pour Point
Density
Specific Gravity
Thermal Expansion
Bulk Modulus
Gases in Mineral Oil
Vapor Pressure
Flash Point
Thermal Conductivity
Specifice Heat
Electrical Conductivity
Surface Tension
Contaminants
Base Oil
Additives
 
  Density  
 

Density is the mass of a unit volume of a substance. Oil density is used to determine the mass of a given volume, or the volume of a given mass. Density is used in lubrication to identify an oil, or oil fractions, and in the measurement of kinematic viscosity (absolute viscosity divided by density). Also, density is in the equations for the calculation of temperature rise in an oil film, and the equation for Reynolds Number (which determines if flow of an oil film is laminar (smooth layers) or turbulent (tumbling)).

The SI unit for density is kg m-3, but usually reported as grams/ml (g/ml-1). For example, an oil could be 850 kg m-3 or 0.850 g ml-1. The density of mineral oil lubricants varies from 0.86 to 0.98 g ml-1
 
 
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