AeroShell Grease 7 Synthetic Airframe Grease
AeroShell Grease 7 is a synthetic, multipurpose airframe grease developed for aircraft components operating across a broad temperature range. It is formulated with a synthetic ester base oil and clay thickener and provides load-carrying capability, corrosion and oxidation resistance, and resistance to water washout.
Its useful operating temperature range is -73°C to +121°C (-99°F to +250°F), supporting aircraft lubrication in extremely low-temperature conditions as well as elevated operating temperatures. AeroShell Grease 7 is used for highly loaded gears, actuator screw mechanisms, aircraft instruments, and general airframe lubrication.
Key Features
- Synthetic ester-based aviation grease
- Clay-thickened formulation
- Useful operating temperature range of -73°C to +121°C (-99°F to +250°F)
- Suitable for extremely low-temperature aircraft applications
- Provides load-carrying capability
- Inhibited against corrosion and oxidation
- Resistant to water washout
- Supports multipurpose airframe lubrication
Recommended Applications
AeroShell Grease 7 is recommended for:
- Highly loaded gears
- Actuator screw mechanisms
- Aircraft instruments
- General airframe lubrication
- Airframe applications in turbine-engine aircraft
- Airframe applications in piston-engine aircraft
Application Restrictions
AeroShell Grease 7 contains synthetic ester oil and should not be used in contact with incompatible seal materials.
AeroShell Grease 7 is a clay-based grease approved to MIL-PRF-23827C Type II. It should not be mixed with soap-based greases approved to MIL-PRF-23827C Type I.
Specifications, Approvals, and Recommendations
- MIL-PRF-23827C (Type II)
- COMAC QPL-CMS-OL-302
- Rolls-Royce OMat401A
Typical Technical Characteristics
The following values are typical of current production and should not be treated as product specifications.
| Property |
Test Method |
Typical Value |
| Oil type |
Not specified |
Synthetic ester |
| Thickener type |
Not specified |
Clay |
| Color |
Not specified |
Beige |
| Base oil viscosity at 40°C |
ASTM D445 |
11.2 mm²/s |
| Useful operating temperature range |
Not specified |
-73°C to +121°C |
| Dropping point |
ASTM D2265 |
Minimum 300°C |
| Worked penetration at 25°C |
ASTM D217 |
285 |
| Unworked penetration at 25°C |
ASTM D217 |
282 |
| Worked stability after 100,000 strokes |
FED-STD-791-313 |
289 |
| Oxidation stability after 100 hours at 99°C |
ASTM D942 |
17 kPa |
| Oil separation after 30 hours at 100°C |
ASTM D6184 |
2.5% mass |
| Water washout at 38°C |
ASTM D1264 |
6% mass |
| Evaporation loss after 22 hours at 100°C |
ASTM D2595 |
1.3% mass |
| Four-ball EP load-wear index |
ASTM D2596 |
40 kgf |
| Low-temperature starting torque at -73°C |
ASTM D1478 |
0.23 Nm |
| Low-temperature running torque at -73°C |
ASTM D1478 |
0.03 Nm |
| Copper corrosion after 24 hours at 100°C |
ASTM D4048 |
Passes |
| Particle count |
FED-STD-791 M.3005 |
Passes |
| Rust prevention at 52°C for 48 hours |
ASTM D1743 |
Passes |
Frequently Asked Questions
What is AeroShell Grease 7 used for?
AeroShell Grease 7 is used for highly loaded gears, actuator screw mechanisms, aircraft instruments, and general airframe lubrication in turbine-engine and piston-engine aircraft.
What type of grease is AeroShell Grease 7?
AeroShell Grease 7 is a synthetic ester-based aircraft grease with a clay thickener. It provides load-carrying capability, corrosion and oxidation resistance, water resistance, and low-temperature performance.
Can AeroShell Grease 7 be used for aircraft wheel bearings?
AeroShell Grease 7 is intended for highly loaded gears, actuator screw mechanisms, instruments, and general airframe lubrication. It is not specifically a high-temperature aircraft wheel-bearing grease.
Is AeroShell Grease 7 mineral-based or synthetic?
AeroShell Grease 7 is synthetic. It is formulated with a synthetic ester base oil and a clay thickener.
What makes AeroShell Grease 7 different from other AeroShell grease products?
AeroShell Grease 7 is a synthetic ester, clay-thickened airframe grease approved to MIL-PRF-23827C Type II. Its low-temperature capability and multipurpose airframe applications distinguish it from AeroShell greases that use mineral base oils, lithium complex thickeners, or formulations developed primarily for wheel bearings, high-temperature service, or heavily loaded sliding applications.
What AeroShell Grease 7 package sizes does Petroleum Service Company offer?
Petroleum Service Company offers AeroShell Grease 7 in several package configurations for different aircraft maintenance requirements:
- 10-tube case (SKU: 550066860-10)
- 30-tube case (SKU: 550066860)
- Case of four 6.6 lb cans (SKU: 550067480)
- 17 kg pail (SKU: 550043646)
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