Typical Physical Characteristics
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PROPERTIES |
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MIL-PRF-24139A |
TYPICAL |
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Oil type |
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Mineral |
Mineral |
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Thickener type |
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Microgel |
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Base oil viscosity |
mm2/s |
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@ 40°C |
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– |
35 |
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@ 100°C |
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– |
5.5 |
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Useful operating temperature |
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–40 to |
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range |
°C |
– |
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+121 |
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Drop point |
°C |
149 min |
260+ |
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Worked penetration @ 25°C |
265 to 320 |
300 |
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Unworked penetration |
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@ 25°C |
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– |
287 |
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Bomb oxidation pressure |
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drop @ 99°C |
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100 hrs |
lb/in2 |
10 max |
9 |
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2 |
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500 hrs |
lb/in |
25 max |
15 |
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Oil separation @ 100°C, |
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in 30 hrs |
% m |
– |
0.7 |
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Water resistance test loss |
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@ 38°C |
% m |
5 max |
2.0 |
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Evaporation loss in 22 hrs |
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@ 121°C |
% m |
– |
1.3 |
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Mean Hertz Load |
kg |
30 |
35 |
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Antifriction bearing |
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performance |
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@ 121°C |
hrs |
– |
2000+ |
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Copper corrosion 24 hrs @ |
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100°C |
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Must pass |
Passes |
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Bearing protection 2 days @ |
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51°C |
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Must pass |
Passes |
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Colour |
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Brown |
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Specifications
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U.S. |
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Approved MIL-PRF-24139A Meets MIL-G-7711A (Obsolete) |
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British |
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Approved DEF STAN 91-12 |
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French |
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Equivalent DCSEA 382/A |
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Russian |
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– |
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NATO Code |
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G-382 |
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Joint Service Designation |
XG-271 |
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AeroShell Grease 6 is a general purpose airframe grease for use in anti-friction bearings, gearboxes and plain bearings within the temperature range of –40°C to +121°C