ISO 26422

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

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Organization: ISO
Publication Date: 15 December 2014
Status: active
Page Count: 16
ICS Code (Lubricants, industrial oils and related products): 75.100
scope:

This International Standard specifies a method of determining the shear stability of polymer-containing lubricating oils by the four-ball machine as specified in ISO 20623, but using a tapered roller bearing. The test results allow prediction of the in-service permanent viscosity loss.

NOTE Other International Standards exist which evaluate viscosity loss of polymer-containing oils. The method specified within this International Standard subjects fluids to a higher shear rate than, for example, the diesel injector nozzle shear test described within ISO 20844.[3] It is particularly appropriate for lubricants being used in high shear applications, such as components with gears and roller bearings. In such applications, the shear rate in the ISO 20844 test method can be too low to generate a realistic permanent loss in viscosity of the fluid.

Document History

ISO 26422
December 15, 2014
Petroleum and related products - Determination of shear stability of lubricating oils containing polymers - Method using a tapered roller bearing
This International Standard specifies a method of determining the shear stability of polymer-containing lubricating oils by the four-ball machine as specified in ISO 20623, but using a tapered roller...
March 15, 2011
Petroleum and related products — Determination of shear stability of lubricating oils containing polymers — Method using a tapered roller bearing
This International Standard 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,...

References

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