Kegelrollenlager (KRL), German for “Tapered Roller Bearing”, epitomises a pivotal testing framework in the lubricant industry, specifically designed to assess the shear stability and permanent viscosity loss in oils enriched with polymer additives. This includes a spectrum of lubricating fluids such as gear oils, engine oils, damper oils, and automatic transmission fluids.
The KRL test employs a tapered roller bearing to shear the lubricant at high rates, effectively mimicking the type of shear stress that lubricants encounter in gearboxes and hydraulic systems. This simulation is crucial as it gauges the lubricant’s capacity to maintain its viscosity under severe mechanical stresses, a vital attribute for operational efficiency and equipment protection.
Significantly, the test not only measures the immediate effects of shear but also quantifies the permanent drop in viscosity that results from these stresses. This loss in viscosity is a critical indicator of the lubricant’s resistance to shear and its ability to perform under pressure.
Recognised as one of the most severe tests for shear stability, the KRL test is predominantly utilised for evaluating driveline fluids and gear lubricants. As the demand for more robust lubricants increases, the duration of KRL shear stability tests has extended, in some cases, to hundreds of hours, reflecting a drive towards more stringent testing to match the advancements in lubricant technology.
At Valorem Chemicals, our engagement with the KRL test is more than just procedural; it is foundational to our commitment to excellence in lubricant formulation. By understanding and applying the insights gained from such severe testing, we enable our clients to formulate lubricants that not only meet but exceed the rigorous demands of modern mechanical systems. Our focus on providing high-quality additives ensures that the lubricants not only resist shear but maintain their protective qualities over longer operational periods, thereby enhancing equipment longevity and performance.
This deep dive into the mechanics and implications of the KRL test underlines our promise at Valorem Chemicals to lead with innovation and expertise, ensuring our clients have access to the best resources for overcoming their most challenging lubrication demands.
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