ISO VG 150, AGMA 4, SAE 40wt. Gear Oil
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).