AeroShell Grease 33MS comprises AeroShell Grease 33 fortified
with 5% molybdenum disulphide. It possesses the
enhanced anti-wear and anti-corrosion properties of AeroShell Grease 33 with the
added EP (Extreme Pressure)
properties provided by the addition of a solid lubricant.
The useful operating temperature range is –73°C to +121°C.
APPLICATIONS
AeroShell Grease 33 has established itself as the answer to most of the
airframe’s General Purpose, airframe greasing
requirements, being approved for use in Boeing, Airbus and many other aircraft
types.
AeroShell Grease 33 sets the standard with
exceptional anti-corrosion and anti-wear performance while allowing aircraft
operators to shrink their grease inventory
and reduce the risk of misapplication. However, there remains a small number of
highly loaded, sliding applications on
the airframe where the additional boost of molybdenum disulphide will always be
required. To address this need, Shell
Aviation has developed AeroShell Grease 33MS.
Sharing the same advanced grease
technology as its parent,
AeroShell Grease 33MS also possesses the extreme pressure (EP) characteristics
provided by molybdenum disulphide.
AeroShell Grease 33MS contains a synthetic oil and must not be used with
incompatible seal materials.
Specifications:
| Properties |
MIL-G-21164 |
Typical |
| AeroShell Grease 33MS Color |
- |
Dark Gray |
| AeroShell Grease 33MS Thickener |
- |
Lithium Complex |
| AeroShell Grease 33MS Dropping Point,
°C |
165 Minimum |
264 |
| AeroShell Grease 33MS Penetration @
25°C Unworked |
200 Minimum |
288 |
| AeroShell Grease 33MS Penetration @
25°C worked |
260 to 310 |
281 |
| AeroShell Grease 33MS Useful Temp.
Range, °C |
- |
-73 to +121 |
| AeroShell Grease 33MS Water resistance test loss @ 40°C %m |
20 maximum |
3.39 |
| AeroShell Grease 33MS Bomb oxidation pressure drop 100 hrs
kPa (psi) |
68.9 (10) maximum |
10.3 |
| AeroShell Grease 33MS Bomb oxidation pressure drop 500 hrs
kPa (psi) |
103.4 (15) maximum |
34.5 |
| AeroShell Grease 33MS base Oil Type |
- |
Synthetic hydrocarbon/Ester |
| AeroShell Grease 33MS Base oil
viscosity mm2/s @ –40°C |
- |
1840 |
| AeroShell Grease 33MS Base oil
viscosity mm2/s @ 40°C |
- |
14.2 |
| AeroShell Grease 33MS Base oil
viscosity mm2/s @ 100°C |
- |
3.4 |
| AeroShell Grease 33MS Useful Temp. Range,
°C |
- |
-73 to +121 |
| AeroShell Grease 33MS Penetration @ 25°C
worked |
260 to 310 |
281 |
| AeroShell Grease 33MS Penetration @ 25°C
Unworked |
200 min |
288 |
| AeroShell Grease 33MS Worked stability (100,000strokes) |
260 - 375 |
309 |
| AeroShell Grease 33MS Bomb oxidation @ 98.9°C
Press Drop @ 100 hr, kPa |
68.9 (10) max |
10.3 |
| AeroShell Grease 33MS Bomb oxidation @ 98.9°C
Press Drop @ 500 hr, kPa |
103.4 (15) max |
34.5 |
| AeroShell Grease 33MS Oil separation @ 100°C in 30 hrs %m |
5 maximum |
2.29 |
| AeroShell Grease 33MS Water resistance test loss @ 40°C %m |
20 maximum |
3.39 |
| AeroShell Grease 33MS Evaporation loss in 22 hrs @ 100°C % m |
2.0 maximum |
0.65 |
| AeroShell Grease 33MS Low Temperature Torque @ -73°C
Starting torque Nm |
0.98 max |
0.50 |
| AeroShell Grease 33MS Low Temperature Torque @ -73°C 1 hr
running torque Nm |
0.098 max |
0.060 |
| AeroShell Grease 33MS Anti-friction bearing performance @
121°C hrs |
1000 minimum |
Greater than 1000 (on all four runs) |
| AeroShell Grease 33MS Extreme pressure properties – load
wear index |
50 mimimum |
57.49 |
| AeroShell Grease 33MS Copper corrosion 24 hr @ 100°C |
1 lb. maximum |
1 lb. |
| AeroShell Grease 33MS Rust Prevention/Bearing protection 2
days @ 52°C |
must pass |
passes / no corrosion |
| AeroShell Grease 33MS Storage Stability 6 months @ 40°C
Unworked penetration |
200 minimum |
226 |
| AeroShell Grease 33MS Storage Stability 6 months @ 40°C
worked penetration |
- |
289 |
| AeroShell Grease 33MS Storage Stability 6 months @ 40°C
Change in penetration from original |
30 max |
8 |
