Aeroshell Grease 33

AeroShell Grease 33 is a synthetic universal airframe grease composed of a lithium complex thickened synthetic base oil with corrosion and oxidation inhibitors and load carrying additives. The useful operating temperature range is −73 to 121 °C. It is approved to Boeing BMS 3-33B and offers the performance properties required by this specification. On Boeing aircraft it can be used for routine lubrication where MIL-PRF-23827C or BMS 3-24 is specified and in some applications requiring MIL-G-21164. It can be used for routine lubrication where MIL-PRF-23827C is specified on aircraft manufactured by McDonnell Douglas, Airbus, BAe Regional Aircraft, Canadair, Lockheed, Embraer, Fokker and Gulfstream (except for wheel bearings and applications above 121 °C). As it contains a synthetic oil, it must not be used with incompatible seal materials.

Typical Properties

• Synthetic hydrocarbon/ester oil; lithium complex thickener; green
• Base oil viscosity 1840 mm²/s at −40 °C, 14.2 at 40 °C, 3.4 at 100 °C
• Drop point 216 °C; worked penetration (25 °C) 297
• Oil separation (100 °C, 30 hours) 2%; mean Hertz load 60
• Anti-friction bearing performance at 121 °C above 1200 hours; passes copper corrosion and bearing protection tests