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Full Description

ISO 26422:2011 specifies a method of determining the shear stability of polymer-containing lubricating oils, including pressure fluids, by the four-ball tester as specified in ISO 20623, but using a tapered roller bearing. The test results allow prediction of the in-service permanent viscosity loss.

 

Document History

  1. ISO 26422:2014


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

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  2. ISO 26422:2011

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

    • Historical Version