LUBRICANTS KNOWLEDGE



CHARACTERISTICS

  • VISCOSITY : Viscosity means resistance to flow and measures how thick and sticky in the temperature of +40°C and +100°C, and reported in centistokes (cSt). Viscosity is one of the factors to choose right lubricants for the applications where lubrication required, higher viscosity means more thicker and flows slowly.
  • VISCOSITY INDEX : Viscosity index represents viscosity changes with temperature, higher viscosity index means the little change in viscosity at temperature rises. High VI lubricants are less affected by temperature changes.
  • FLASH POINT : Flash point is the lowest temperature at which vapor produced and can be ignited. Fire point is the lowest temperature at which vapors keep on burning, fire point is higher than flash point.
  • POUR POINT : Pour point is the temperature at oil doesn’t flow, high pour point caused by paraffin wax contains in the lubricant and it cannot be used in cold temperature.
  • TBN : Total Base Number (TBN) is the quantity of acid, expressed in terms of the equivalent number of milligrams of potassium hydroxide that is required to neutralize all basic constituents present in 1 gram of sample (ASTM Designation D 974). It means the oil's ability to neutralize acids that are produced during use and engine oil has higher the base number than industrial oil.