AeroShell Grease 7
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AeroShell Grease 7 is an advanced multi-purpose grease, composed of a synthetic oil thickened with Microgel®, possessing good load carrying ability over a wide temperature range. It is inhibited against corrosion and has excellent resistance to water.
The useful operating temperature range is –73°C to +149°C.
APPLICATIONS
AeroShell Grease 7 satisfies nearly all the airframe grease requirements of turbine engined aircraft and also those of piston engined aircraft provided that seal incompatibility does not occur. Most civil aircraft manufacturers approve AeroShell Grease 7 as a general purpose grease either by brand name or by specification. It is recommended for lubricating highly loaded gears, actuator screw mechanisms, etc., also for instrument and general airframe lubrication within the temperature range of –73°C to +149°C.
AeroShell Grease 7 contains a synthetic ester oil and should not be used in contact with incompatible seal materials. Refer to the General Notes at the front of this section.
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 MILPRF-23827C Type I.
SPECIFICATIONS
| U.S. | Approved MIL - PRF-23827C (Type II ) |
| British | -- |
| French | Equivalent DCSEA 354/A |
| Russian | -- |
| NATO Code | G-354 |
| Joint Service Designation | -- |
| PROPERTIES | MIL-PRF-23827C Type II |
TYPICAL |
| Oil type | Synthetic | Synthetic ester (Diester) |
| Thickener type | Clay | Microgel |
| Base oil viscosity mm²/s -40°C at 40°C at 100°C |
-- -- -- |
1150 10.3 3.1 |
| Useful operating temperature range °C | -- | –73 to +149 |
| Drop point °C | 165 min | 260+ |
| Worked penetration at 25°C | 270 to 310 | 296 |
| Unworked penetration at 25°C | 200 min | 283 |
| Bomb oxidation pressure drop at 99°C 100 hrs kPa 500 hrs kPa |
70 max 105 |
62 96.5 |
| Oil separation at 100°C, in 30 hrs % m |
5 max |
3.0 |
| Water resistance test loss at 38°C % m |
20 max |
0.80 |
| Evaporation loss in 22 hrs at 100°C % m |
2.0 max |
0.5 |
| Mean Hertz Load (kg) | 30 min | 60 |
| Antifriction Bearing Performance at 121°C (hrs) |
-- |
2460 |
| Copper corrosion 24 hrs at 100°C | Must pass | Passes |
| Bearing protection 2 days at 52°C | Must pass |
Passes |
| Colour | -- | Buff |