Liebherr-Aerospace introduces lubricant for aviation

Aviation Liebherr-Aerospace Introduces Lubricant for Aviation

2025-10-02 From Liebherr-Aerospace Lindenberg GmbH | Translated by AI 1 min Reading Time

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Liebherr-Aerospace and specialized lubricant manufacturers have jointly developed a product designed for the specific temperature conditions of aviation.

The new lubricant exhibits a consistent friction ratio over a wide temperature range.(Image: Liebherr) — The new lubricant exhibits a consistent friction ratio over a wide temperature range.
(Image: Liebherr)

As part of a research and technology program, Liebherr-Aerospace Lindenberg GmbH (Germany) and specialized lubricant manufacturers have jointly developed a lubricant over the past four years that meets the challenging temperature conditions in aviation. One of the goals was to achieve a consistent friction coefficient across a wide temperature range. This is necessary to ensure the long-term stability and performance of the no-back brakes contained in actuators throughout the entire lifecycle of an aircraft.

In the automotive industry, so-called "automatic transmission fluids" are used for similar friction-related reasons. However, the products currently available on the market for this purpose are not suitable for the low temperatures required in aviation due to their high viscosity. Therefore, the team developed a new formulation of these lubricants that provides the desired friction coefficient in a low-viscosity and thus low-temperature-compatible version.

Conflux is developing an advanced heat exchanger using additive manufacturing for Airbus' Zeroe project, which aims to bring a commercially viable, fully electric, hydrogen-powered passenger aircraft into operation. (Image:Conflux)

Synthetic hydraulic oils currently used as lubricants for aerospace actuators and gearboxes change their viscosity depending on the fluid temperature. Compared to these lubricants, the new lubricant demonstrated not only the desired consistency in the friction coefficient during a durability test but also improved efficiency at low temperatures and better corrosion protection. It thus represents another component in the continuous improvement of aerospace products and underscores the significance of lubricants as a "wet design element" in aircraft design and certification.

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