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AeroShell Grease 7
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About AeroShell Grease 7
AeroShell Grease 7 is a premium, synthetic diester-based aviation grease designed for exceptional performance across a wide range of temperatures. Engineered with Microgel® thickening technology, it offers superior load-carrying ability, corrosion protection, and water resistance in critical aircraft systems.
With an operational range from -99°F to 300°F (-73°C to 149°C), AeroShell Grease 7 delivers reliable lubrication for actuators, gears, instruments, and airframe components. It reduces wear, extends service life, and ensures consistent performance even under extreme conditions.
PJi® offers AeroShell Grease 7 along with a complete selection of AeroShell aviation lubricants trusted by operators worldwide. Contact our aviation specialists today for expert support and same-day shipping on in-stock AeroShell products.
Frequently Asked Questions
What is AeroShell Grease 7?
AeroShell Grease 7 is a high-performance synthetic aircraft grease formulated for wide-temperature operation. Using a synthetic ester base oil and clay thickener, it provides superior load-carrying ability, water resistance, and corrosion protection across a broad range of aviation applications.
What makes AeroShell Grease 7 ideal for aviation use?
This multipurpose grease is engineered for both turbine and piston-engine aircraft, offering excellent lubrication in high-load and high-temperature conditions. Its synthetic base ensures stability and protection under varying flight environments, while its Microgel® technology enhances oxidation resistance and consistency.
What are the main applications of AeroShell Grease 7?
It is commonly used for actuator screw mechanisms, instrument bearings, highly loaded gears, and general airframe lubrication. Most civil aircraft manufacturers, including Cessna and Piper, approve AeroShell 7 either by specification or brand name for these critical components.
What is the operating temperature range for AeroShell Grease 7?
AeroShell Grease 7 operates effectively between -99°F and 250°F (-73°C to 121°C), making it suitable for both high-altitude and ground-based aircraft operations. Its performance in extreme cold and hot environments ensures consistent lubrication across climates.
Can AeroShell Grease 7 be used for wheel bearings?
While AeroShell 7 can handle some wheel bearing applications, it’s not the primary recommendation for heavy-load areas exposed to water or deicing fluids. Greases like AeroShell 22 or AeroShell 33 provide additives better suited for those conditions.
How does AeroShell Grease 7 perform in cold climates?
It maintains outstanding performance even at -99°F (-73°C), with low start-up torque of only 0.23 Nm at that temperature. This ensures smooth operation in cold-weather and high-altitude conditions where other greases may thicken excessively.
What is the maximum operating temperature for AeroShell Grease 7?
AeroShell 7 remains stable up to 250°F (121°C) and maintains lubrication integrity without excessive oil separation or oxidation, as demonstrated by a low 1.3% evaporation loss after 22 hours at 100°C.
What type of thickener and oil does AeroShell Grease 7 use?
It contains a synthetic ester base oil and a clay thickener. This non-melting composition ensures thermal stability and reliable protection in high-speed or high-temperature conditions.
Is AeroShell Grease 7 compatible with other types of grease?
It should not be mixed with soap-based greases, including MIL-PRF-23827C Type I formulations. Mixing greases with different thickeners can lead to softening, oil separation, or reduced protection. Always clean old grease thoroughly before switching to a new one.
Does AeroShell Grease 7 resist oxidation and corrosion?
Yes. Its oxidation pressure drop after 100 hours at 99°C is only 17 kPa – well below the 70 kPa limit – demonstrating excellent long-term stability. It also passes ASTM D1743 rust prevention testing, confirming strong corrosion protection for aircraft metals.
Is AeroShell Grease 7 resistant to water washout?
AeroShell 7 exhibits excellent water resistance, with only 6% loss during ASTM D1264 testing at 38°C. This ensures it stays in place even when exposed to rain, humidity, or washing conditions common in aviation environments.
What industry approvals does AeroShell Grease 7 meet?
It meets MIL-PRF-23827C (Type II) and COMAC QPL-CMS-OL-302 standards, confirming its suitability for civil and commercial aircraft applications. These certifications attest to its reliability in both turbine and piston-engine aircraft systems.
Can AeroShell Grease 7 be used in both turbine and piston aircraft?
Yes. It satisfies nearly all airframe grease requirements for turbine-engined aircraft and most piston-engine aircraft, provided there are no seal material incompatibilities. Always verify compatibility with the aircraft’s maintenance manual before application.
What safety precautions should be taken when handling AeroShell Grease 7?
When handled properly, AeroShell 7 poses minimal health risks. Avoid skin contact. Wear protective gloves and wash your hands with soap and water after handling. Dispose of used grease responsibly through authorized collection points.