ISO VG 150 industrial gear oils are necessary for the seamless operation of heavy duty, industrial gearboxes. Weight refers to the oil’s viscosity.
ISO VG 150 gear oil has a midpoint kinematic viscosity of 150 mm2/s, also referred to as centistokes (cSt). AGMA 4 lubricants have a minimum viscosity of 135 mPa.s and a maximum viscosity of 165 mPa.s. These numbers refer to the standard testing mechanisms used to determine an oil’s resistance to flow (viscosity).