Optimizer4D can automatically rate lubricants in terms of their mechanical and dynamic properties. The images show the difference in structure-borne sounds between two different lubricants during an abrasion test of axial cylinder roller bearings, according to DIN51819.
During the testing at a FE-8 test bench an axial load has been raised upon a disc spring pack.
Composition of lubricant A: base oil SAE 75W-80 with wear protective additives
Composition of lubricant B: like lubricant A, but also with anti-corrosion additives
HFIM signals of lubricant A with anti-corrosive additives, without protective additives: Initially, strong HFIM-signals are detected during which lubricant A shows noticeable HFIM-signals and thus a heavy strain on the bearing. But this is only the turbulent beginning phase which can be minimized with the help of the machines controls. The long-term strain is crucial here, which speaks for the quality of lubricant A – it does not do any damage to the bearings in the long-term view.
HFIM-signals of lubricant B with wear protective additives as well as anti-corrosive additives: This lubricant may show a rather smooth start, but after about 1800 minutes, strong acoustic emissions can be detected, which are caused by pittings forming in the bearing.