AGMA 4 EP, ISO VG 150 | Gear Lube (EP)


Some geardrives operate under such severe pressures and temperatures that they require a particular additive, an extreme pressure (EP) additive, to thoroughly protect the internal components. The gearboxes in which these EP gear lubes are used are commonly referred to as heavily-loaded gearboxes. In addition to the extreme pressure additive, these oils contain additional additives which contribute to the performance characteristics of these lubricants. Combining premium base stocks with EP and other unique additives, Extreme Pressure (EP) gear lubes are capable of withstanding the harshest of situations while still performing in a high capacity.

ISO VG 150 oil has a midpoint kinematic viscosity of 150 mm2/s, also referred to as centistokes (cSt). The midpoint is derived by taking the average of both the minimum and maximum kinematic viscosities. In the case of ISO VG 150 oil, those numbers are 135 cSt and 165 cSt, respectively. 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 how much resistance to flow (i.e. viscosity) these oils demonstrate.

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