Hydraulic Fluid and Oil 32, 46, 68, 100, 150
Hydraulics fluid also called hydraulic liquids, are the medium by which power is transferred in hydraulic machinery. Common hydraulic fluids are based on mineral oil or water. Examples of equipment that might use hydraulic fluids include excavators and backhoes, hydraulic brakes, power steering systems, transmissions, garbage trucks, aircraft flight control systems, lifts, and industrial machinery.
ISO INDUSTRIAL LUBRICATING OIL VISCOSITY CLASSIFICATION
International Standards Organization (ISO) viscosity classification relates to viscosity (cSt) at 40 degrees. It consist of a series of 18 viscosity brackets between 1.98 cSt and 1650 cSt defined by a number. these numbers indicate to the nearest whole number, the mid points of their corresponding brackets. Thus ISO viscosity grade 46 relates to the viscosity bracket 41.4 sCt to 50.6 cSt the mid point which 46.