What is the purpose to conduct grease cone penetration test?
In the early days of grease testing the cone penetration test was thought to say something about the viscosity of the grease. However, since those days it was proven that greases do not have one viscosity but that this viscosity is a very complex variable among others dependent on the greases previous history, on temperature and on time. This is why for theoretical research the cone penetration test does not have a lot of value.
