ISO 26422:2014

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Petroleum and related products — Determination of shear stability of lubricating oils containing polymers — Method using a tapered roller bearing

ISO 26422:2014 is an international standard that specifies a method to determine the shear stability of lubricating oils containing polymers, particularly relevant for high shear applications like gears and roller bearings, by using a tapered roller bearing test to predict potential permanent viscosity loss in service; essentially, it measures how well a lubricant can withstand high shear forces without significant viscosity degradation.