BS ISO 26422:2014
Current
The latest, up-to-date edition.
Petroleum and related products. Determination of shear stability of lubricating oils containing polymers. Method using a tapered roller bearing
Hardcopy , PDF
English
31-03-2015
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and materials
6 Apparatus
7 Preparation
8 Procedure
9 Referencing
10 Reporting of results
11 Precision
12 Test report
Bibliography
Describes 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.
| Committee |
MCE/18/-/16
|
| DevelopmentNote |
Supersedes 14/30290161 DC. (04/2015)
|
| DocumentType |
Standard
|
| Pages |
20
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This International Standard specifies a method of determining the shear stability of polymer-containing lubricating oils by the four-ball machine as specified in ISO20623, 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 ISO20844.[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 ISO20844 test method can be too low to generate a realistic permanent loss in viscosity of the fluid.
| Standards | Relationship |
| ISO 26422:2014 | Identical |
| DIN 51350-6:1996-08 | TESTING OF LUBRICANTS - TESTING IN THE SHELL FOUR-BALL TESTER - PART 6: DETERMINATION OF SHEAR STABILITY OF LUBRICATING OILS CONTAINING POLYMERS |
| ISO 20844:2015 | Petroleum and related products — Determination of the shear stability of polymer-containing oils using a diesel injector nozzle |
| ISO 20623:2003 | Petroleum and related products Determination of the extreme-pressure and anti-wear properties of fluids Four ball method (European conditions) |
| ISO 355:2007 | Rolling bearings Tapered roller bearings Boundary dimensions and series designations |
| ISO 4259:2006 | Petroleum products Determination and application of precision data in relation to methods of test |
| ISO 3105:1994 | Glass capillary kinematic viscometers — Specifications and operating instructions |
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