AeroShell Grease 5 High-Temperature Aircraft Grease
AeroShell Grease 5 is a mineral oil-based aircraft grease developed for wheel bearings and engine accessories operating under high loads, high speeds, and relatively high temperatures. Its clay-thickened formulation provides load-carrying capability, oxidation and corrosion resistance, and resistance to water washout.
The useful operating temperature range of AeroShell Grease 5 is -18°C to +149°C (-0.4°F to +300°F). It is particularly suited for aircraft wheel bearings exposed to high landing speeds and the heat generated during operation. It may also be used in high-speed aircraft and engine accessories such as magnetos, generators, and starters.
AeroShell Grease 5 is also commonly used on piston aircraft propellers.
Key Features
- Mineral oil-based aircraft grease
- Clay-thickened formulation
- Useful operating temperature range of -18°C to +149°C (-0.4°F to +300°F)
- Developed for high-speed and relatively high-temperature applications
- Provides load-carrying capability
- Inhibited against oxidation and corrosion
- Resistant to water washout
Recommended Applications
AeroShell Grease 5 is particularly effective as an aircraft wheel-bearing grease, especially where landing speeds are high.
It may also be used for the lubrication of aircraft and engine accessories operating at high speeds and relatively high temperatures, including:
- Aircraft wheel bearings
- Magnetos
- Generators
- Starters
- Piston Aircraft Propellers
Specifications, Approvals, and Recommendations
The current AeroShell Grease 5 technical data sheet lists:
- MIL-G-3545C (obsolete)
- DTD.878A (obsolete)
- DCSEA 359/A (equivalent)
- NATO Code G-359 (obsolete)
- Joint Service Designation XG-277 (obsolete)
- Rolls-Royce Omat428A
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 |
Mineral |
| Thickener type |
Not specified |
Clay |
| Color |
Appearance |
Amber |
| Base oil viscosity at 40°C |
ASTM D445 |
500 to 525 mm²/s |
| Base oil viscosity at 100°C |
ASTM D445 |
32 mm²/s |
| Useful operating temperature range |
Not specified |
-18°C to +149°C |
| Dropping point |
ASTM D2265 |
Minimum 288°C |
| Worked penetration at 25°C |
ASTM D217 |
281 |
| Oxidation stability after 100 hours at 99°C |
ASTM D942 |
5 psi |
| Oxidation stability after 500 hours at 99°C |
ASTM D942 |
5 psi |
| Oil separation after 30 hours at 100°C |
ASTM D6184 |
2% mass |
| Water washout at 41°C |
ASTM D1264 |
4.5% mass |
| Low-temperature starting torque at -17.8°C |
ASTM D1478 |
0.3432 Nm |
| Low-temperature running torque at -17.8°C |
ASTM D1478 |
0.0579 Nm |
| Copper corrosion after 24 hours at 100°C |
FED-STD-791-5309 |
Passes |
| Particle count |
FED-STD-791 M.3005 |
Passes |
| Rust test |
ASTM D1743 |
Passes |
Frequently Asked Questions
What is AeroShell Grease 5 used for?
AeroShell Grease 5 is used primarily for aircraft wheel bearings and high-speed engine accessories operating at relatively high temperatures. Typical applications include wheel bearings, magnetos, generators, and starters.
Is AeroShell Grease 5 suitable for aircraft wheel bearings?
Yes. Aircraft wheel bearings are a primary application for AeroShell Grease 5, particularly when landing speeds are high and the bearings are exposed to elevated operating temperatures.
What type of grease is AeroShell Grease 5?
AeroShell Grease 5 is a mineral oil-based aircraft grease with a clay thickener. It is formulated to provide load-carrying capability, oxidation and corrosion resistance, and resistance to water washout.
What should be considered when using AeroShell Grease 5 at low temperatures?
When rolling bearings must start at temperatures as low as -18°C, the grease should be given adequate time to channel before normal operation. AeroShell Grease 5 uses a relatively high-viscosity mineral base oil, which supports heavy-load and high-temperature applications but requires consideration during low-temperature startup.
What makes AeroShell Grease 5 different from other AeroShell greases?
AeroShell Grease 5 uses a high-viscosity mineral base oil and clay thickener and is primarily intended for high-temperature wheel-bearing and engine-accessory applications. Other AeroShell greases may use lighter mineral oils, synthetic base oils, lithium complex thickeners, or additive systems intended for wider temperature ranges or different aircraft components.
What AeroShell Grease 5 package sizes does Petroleum Service Company offer?
Petroleum Service Company offers AeroShell Grease 5 in several package configurations for different aircraft maintenance requirements:
- 10-tube case (SKU: 550043641-10)
- 30-tube case (SKU: 550043641)
- 17 kg pail (SKU: 550043617)
