Description
Synthetic grease for aircraft
AeroShell Grease 22 is a versatile advanced general purpose grease composed of a synthetic hydrocarbon oil and clay thickener, with outstanding performance characteristics. Appropriate additives are included to achieve the necessary oxidation and corrosion resistance, anti-wear properties and load carrying properties.
The useful operating temperature range is –540C to +1770C.
Main Applications
AeroShell Grease 22 is especially recommended for use wherever severe operating conditions are encountered as in high bearing loads, high speeds, wide operating temperature range, and particularly where long grease retention and high resistance to water washout are required.
The wide range of applications include aircraft wheel bearings, engine accessories, control systems, actuators, screw-jacks, servo mechanisms and electric motors, helicopter rotor bearings, instruments, airframe lubrication , hinge pins , static joints , landing gears .
AeroShell Grease 22 contains a synthetic hydrocarbon oil and should not be used in contact with incompatible seal materials.
Specifications, Approvals & Recommendations
- MIL – PRF-81322G
- MIL-PRF-24508B
- DEF STAN 91-52 (BRITISH)
- COMAC QPL-CMS-OL-301
- DCSEA 395/A(FRENCH)
- RUSSIAN Analogue of CIATIM 201 and 203, VNII P 207,ERA (VNII NP 286 M)and ST (NK-50)
- NATO CODE G-395
- Joint Service Designation XG-293For a full listing of equipment approvals and recommendations, please consult your local Shell Technical Helpdesk.
Typical Physical Characteristics
| Properties | Method | MIL-PRF-81322G | AeroShell Grease 22 Typical | ||
| Oil type | Synthetic Hydrocarbon | ||||
| Thickener type | Clay | ||||
| Colour | Visual | Amber | |||
| Base Oil viscosity | @-400C | mm2/s | 7 500 | ||
| Base Oil viscosity | @400C | mm2/s | 30.5 | ||
| Base Oil viscosity | @1000C | mm2/s | 5.7 | ||
| Useful operating temperature range | 0C | -54 to +177 | |||
| Dropping point | 0C | ASTM D2265 | 232 min | >300 | |
| Worked penetration | @250C | ASTM D217 | 256 to 320 | 283 | |
| Bomb Oxidation pressure drop 100 hrs | @990C | kPa | ASTM D942 | 83 max | 14 |
| Bomb Oxidation pressure drop 500 hrs | @990C | kPa | ASTM D942 | 172 max | 21 |
| Oil separation 30 hrs | @1770C | % m | ASTM D6184 | 2.0 to 8.0 | 5.8 |
| Water washout | @410C | % m | ASTM D1264 | 20 max | 2.0 |
| Evaporation loss (22 hrs) | @1770C | % m | ASTM D2595 | 10 max | 1.1 |
| Properties | Method | MIL-PRF-81322G | AeroShell Grease 22 Typical | ||
| Anti-friction bearing performance | @1770C | hrs | ASTM D3336 | 400 min | >400 |
| Load carrying capacity | kg | ASTM D2596 | 30min | 40 | |
| Copper corrosion 24 hrs | @1000C | ASTM D4048 FED-STD-791 5309 | Must pass | Passes | |
These characteristics are typical of current production. Whilst future production will conform to Shell’s specification, variations in these characteristics may occur.
Health and Safety
This product is unlikely to present any significant health or safety hazard when properly used in the recommended application and good standards of personal hygiene are maintained
Avoid contact with skin. Use impervious gloves with used oil. After skin contact, wash immediately with soap and water.
Guidance on Health and Safety is available on the appropriate Safety Data Sheet, which can be obtained from https://www.epc.shell.com
Protect the Environment
Take used oil to an authorised collection point. Do not discharge into drains, soil or water
Advice
Advice on applications not covered here may be obtained from your Shell representative.
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