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.
What constitutes a grease? There are three main components that make a grease, base oil, thickener (sometimes called gellent) and an additive package. Making a grease is thought to be like extreme cooking and in the video, we tried to give an insight into the almost bewildering options and permutations…
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…
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…
Copper Corrosion test is also known as ASTM method D-4048. A grease copper corrosion test is performed to ensure that a grease will protect the metal surfaces it comes in contact with over time. The test begins by the technician polishing a copper strip sample. The sample is then totally…
There are a variety lubricant additives that we have the ability to include in our grease formulations. Note that we describe our additives, we use terminology relating to the benefit of the additive rather than than giving details of the chemical way in which the benefit is achieved; we don’t…
This article is focused on determining tribological characteristic of a lubricating grease, using two ASTM test methods, the 4-Ball EP Tester and 4 Ball Wear. The 4 Ball EP Tester focuses on Extreme pressure (EP) properties and the 4 Ball Wear focuses on wear scar (WS), and coefficient of friction…