Testing

Oxidative Stability test (ASTM D-6186)

The Oxidative Stability test (ASTM D-6186) measures the ability of a lubricant to resist oxidation at elevated temperatures. The test can be conducted on an oil or grease.

Typically reported in ‘minutes’ – The greater the time to exotherm, the better the oxidative stability of the lubricant. Test conditions are the the O2 stability method.

The test conditions:

150°C or 175°C
3500 kPa oxygen
24 hours
100ml/min oxygen

Red line: PAO 4. Blue line: PAO 4 with 1 additive. Black line: PAO 4 with 2 additives

Take a look at the article Understanding the role of antioxidants in lubricants

Oil separation test (ASTM D-6184)

The oil separation test is also known as ASTM method D-6184. An oil separation test is performed to determine the tendency of the oil to separate from a lubricating grease. This test is one of the four required tests performed on all greases at Nye by the Quality Release Team…

Automotive Bearing Powertrain Steering Testing

Grease Low Temperature Torque testing (ASTM D-1478)

The grease low temperature torque test measures how a grease inhibits the motion of a slow rotating ball bearing at a low temperature: Test is run below -20°C at 1 RPM. Starting torque and running torque is recorded after 60 minutes. Very useful data point for selecting a grease for…

Testing

Grease Penetration Test (ASTM D-217 and ASTM D-1403)

Grease penetration tests are conducted by Nye technicians in order to determine the stiffness of a grease. The P0, or unworked and P60 or worked penetration tests follow ASTM D-217 method for full scale or ASTM D-1403 method for half scale or quarter scale. They are two of the four…

Aerospace Testing Vacuum & Cleanroom

Lubricant Vapour Pressure test

The Knudsen effusion test method is used to determine the vapour pressure at several temperatures. Below is an example of how the Knudsen vapour pressure test results are displayed on a technical data sheet of one of our lubricants: As you will see, our chosen unit of measure is Torr.

Testing

Dropping point test (ASTM D-2265)

Dropping Point is also known as ASTM Method D-2265. The dropping point of a grease is the temperature at which it passes from a semi-solid to a liquid state. The dropping point test determines the cohesiveness of the oil and thickener of a grease, or when the thickener breaks down….

Aerospace Automotive Aviation Base Oil articles Bearing Conductive Grease Connector Grease Damping Grease Electrical Interior Lead Screw Misc Potentiometer Power Tool Powertrain Reference Squeaks & Rattles Steering Suspension Switch Grease Testing Theory

Lubricants and possible plastic or rubber compatibility issues

If you are trialling the use of a grease or oil in a prototype device then you will appreciate how crucial lubricants can be; extending the functional life of components, improving the tactile feel of customer operated controls…the reasons to include a lubricant are many and well worthwhile. Before you…

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