Royco 11MS Grease

Royco 11MS aircraft grease plays a critical role in protecting heavily loaded, sliding airframe components from wear and corrosion. Its molybdenum disulfide (MoS₂) formulation reduces friction under boundary lubrication conditions, helping extend component service life. By maintaining lubrication integrity in demanding environments, Royco 11MS supports landing gear reliability and overall aircraft safety. Proper grease selection helps reduce unscheduled maintenance and long-term operating costs.

Royco 11MS is commonly used on landing gear bogie pivot pins, actuators, sliding surfaces, and other high-load airframe components. It is designed for severe-duty applications where metal-to-metal contact may occur. Its resistance to water washout and corrosion makes it suitable for aircraft operating in moisture- or salt-laden environments. Always confirm application approval in the aircraft maintenance manual.

Molybdenum disulfide (MoS₂) enhances the load-carrying capacity of Royco 11MS grease. It forms a solid lubricating film on metal surfaces, reducing friction and wear under high pressure. This protection is especially valuable in landing gear and actuator assemblies where stress levels are significant. The result is improved durability and reduced surface damage.

Royco 11MS is engineered to perform over a temperature range of approximately -40°F to 300°F. Its silicone-based thickener system maintains stability and lubrication properties across a wide thermal range. This ensures consistent grease performance during cold-soak conditions and high-heat operational cycles. Reliable temperature performance is critical for aircraft operating in varied climates.

Royco 11MS contains corrosion inhibitors that protect metal surfaces from rust and oxidation. Its formulation resists water intrusion and helps prevent washout in wet conditions. These characteristics make it well-suited for aircraft operating in coastal, humid, or marine environments. Long-term corrosion protection helps preserve structural integrity and reduce maintenance intervals.

Royco 11MS meets the requirements of MIL-G-7711A (now obsolete) and remains specified in many legacy aircraft maintenance programs. It has been approved for use in landing gear assemblies on various Boeing, McDonnell Douglas, and other transport-category aircraft. Compliance with established aviation specifications ensures compatibility with approved lubrication procedures. Always reference current maintenance documentation for proper application guidance.

Royco 11MS uses a silicone-based thickener system that supports stability across a broad temperature range. This thickener contributes to the grease’s resistance to oxidation and moisture. Combined with MoS₂ additives, it delivers durable lubrication under severe service conditions. The formulation is optimized specifically for aviation applications.

Royco 11MS reduces wear by forming a protective lubricating layer between contacting metal surfaces. The MoS₂ additive prevents surface scoring and galling during high-load operations. This protection is especially important during taxi, landing, and braking cycles when loads are elevated. Consistent lubrication improves long-term landing gear performance.

Yes, Royco 11MS offers strong resistance to water washout, making it suitable for aircraft exposed to rain, runway spray, or marine environments. Its formulation helps maintain lubrication even in the presence of moisture. Water resistance reduces the likelihood of corrosion and grease breakdown. This ensures continued protection between scheduled maintenance intervals.

Royco 11MS should be applied in accordance with the aircraft manufacturer’s maintenance manual and lubrication chart. Proper surface cleaning prior to application is essential to prevent contamination. Avoid mixing with incompatible greases unless approved by maintenance documentation. Correct application practices help maximize grease performance and service life.

When used properly and in approved applications, Royco 11MS can help reduce wear and corrosion-related degradation. By maintaining a stable lubricating film under severe loads, it supports longer component life. Reduced wear can help extend service intervals within approved maintenance programs. However, always follow OEM inspection schedules.

Royco 11MS is available in convenient packaging, including 14-oz cartridges for use with standard grease guns. Cartridge packaging supports clean application and controlled dispensing during routine maintenance. Proper storage in a cool, dry environment helps preserve product integrity. Always verify product condition before use.

While Royco 11MS is formulated specifically for aviation, its severe-duty lubrication properties may be suitable for industrial equipment operating under similar high-load conditions. Applications requiring extreme-pressure, corrosion-resistant grease may benefit from its performance characteristics. However, compatibility with non-aviation systems should be verified before use.