Unworked penetration and consistency
Every grease changes during use. It becomes softer or harder, depending on load and thickener. However, a solid or softened used grease can be dangerous for the lubricated element. This is why we determine penetration as part of the all-inclusive analysis kit 5. It provides information about this change and also enables the grease to be assigned to the NLGI consistency class. A change compared to fresh grease informs you, among other things, whether the grease can still be distributed well in a bearing or whether it has softened to such an extent that it bleeds out. To determine the unworked penetration, 3 ml of used grease is poured into a pot. A special cone is placed on its surface. Its penetration depth into the grease is measured after 5 seconds in 0.1 mm and specified as penetration.
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