On order
Mobilgrease 28
Clay-thickened synthetic aviation grease, MIL-PRF-81322, −54 to +177 °C
NLGI 1.5
Specifications
- Brand
- Mobil (ExxonMobil)
- Category
- Aviation greases
- Viscosity
- NLGI 1.5
- Manufacturer code
- 201550402040
- Availability
- On order
Manufacturer's description
Mobilgrease 33 is a high-performance lithium-complex grease designed for general-purpose aircraft use, with a consistency between NLGI grades 1 and 2. It uses a 100% polyalphaolefin (PAO) base oil combined with premium additives, offering exceptional thermal/oxidative resistance, low volatility, resistance to hydrolysis, and excellent low-temperature mobility without the vulnerability of ester-based greases to water degradation. It is a true multipurpose aviation grease intended for highly loaded anti-friction bearings, gears and actuators, instruments and high-speed bearings (though not recommended for wheel bearings), and general airframe lubrication over -73°C to 121°C. The lithium-complex thickener system provides excellent structural stability and water washout resistance, while its additive system delivers superior rust, wear and load-carrying protection compared with greases that only meet the minimum MIL-PRF-23827 requirements. Mobilgrease 33 meets U.S. Military Specification MIL-PRF-23827, Type I, Boeing BMS 3-33C (Type 1) and Airbus AIMS09-06-002/SAE AMS3052, and is listed on the Qualified Products Lists of Airbus, Boeing and the U.S. Military. Its NATO Code Number is G-354.
Applications
- Mobilgrease 33 is a true multipurpose aviation grease intended for use in highly loaded anti-friction bearings, gears, and actuators as well as instruments, high speed bearings (though not recommended for wheel bearings), and general airframe lubrication, over operating temperatures from –100ºF to 250ºF (–73ºC to 121ºC). It can be used in all applications for which the aircraft manufacturer specifies U.S. Military Specification MIL-PRF-23827, Type I (Grease, Aircraft and Instrument, Gear and Actuator Screw, Grease thickened with metallic soap), Boeing BMS 3-33C (Grease, Aircraft, General Purpose), and Airbus AIMS09-06-002/SAE AMS3052 (Grease, General Purpose, Airframe, Low Temperature Range, Lithium Thickened). Mobilgrease 33 is listed in the Qualified Products List of Airbus, Boeing, and the U.S. Military for these specifications. The NATO Code Number for Mobilgrease 33 is G-354.
Performance & benefits
- Good storage stabilityGrease structure integrity maintained - low oil separation
- Exceptional resistance to thermal and oxidative degradationLong grease and lubricated part service life
- Low volatilityLittle vulnerability to significant base oil loss by evaporation in service
- Resistance to degradation by water (hydrolysis)No risk of corrosion induced by acidic base oil degradation products
- Excellent protection against wear, corrosion, and rustingExcellent bearing and component protection
- Extreme-pressure characteristicsPrevention of excessive wear, even under shock load
- High resistance to water washoutExcellent grease performance in adverse weather and other water-exposure conditions
Standards & approvals
Approved for
Typical characteristics
| Property | Typical value | Method |
|---|---|---|
| Al/Ni Bronze Corrosiveness, 24 h, 100 CRating | PASS | SAE AMS3058 3.2.7.b |
| Base oil viscosity of Greases @ 100 Cmm2/s | 3.2 | AMS 1700 |
| Base oil viscosity of Greases @ 40 Cmm2/s | 12.5 | AMS 1697 |
| Boeing Dynamic Bearing Life, cycles, BMS 3-33 | PASS | |
| Bomb Oxidation, Pressure Drop, 100 h, kPa | 11 | ASTM D942 |
| Colour | Blue Green | Visual |
| Copper strip corrosion, 24 h, 100 CRating | 1B | ASTM D4048 |
| Dirt, # particles 25u to 74 u | 0 | FTM 3005 |
| Dirt, # particles 75u or larger | 0 | FTM 3005 |
| Dropping point°C | 255 | ASTM D2265 |
| EMCOR Rust, 3% NaCl | 0,0 | IP 220 |
| Evaporation loss, 22 h, 100 C, mass% | 1 | ASTM D2595 |
| Evaporation loss, 500 h, 121 C, mass % | 8.7 | ASTM D2595 |
| Four-Ball Extreme pressure Test, Weld loadkgf | 700 | ASTM D2596 |
| Four-Ball Wear Test, Scar Diametermm | 0.4 | ASTM D2266 |
| Fretting Wearmg | 0.6 | ASTM D4170 |
| Gear Wear Test, 2.3 kg load, 1000 cycles, gear wt lossmg | 1.1 | FTM 335 (mod) |
| Gear Wear Test, 4.5 kg load, 1000 cycles, gear wt lossmg | 1.6 | FTM 335 (mod) |
| High Temperature Performance, Hrs at 121 Ch | 2,200+ | ASTM D3336 |
| Load carrying capacity, Load-Wear Indexkgf | 110 | ASTM D2596 |
| NBR-L, AMS 3217/2 Compat, 70C 158 h, vol % | 12.6 | FTM 3603 |
| Odour, OLFACTORY | PASS | |
| Oil separation, 30 h @ 100 C, mass% | 4 | ASTM D6184 |
| Oxidation stability, Pressure Drop, 500 h, kPa | 25 | ASTM D942 |
| Penetration, 60X, 0.1 mm | 292 | ASTM D217 |
| Penetration, Unworked, 0.1 mm | 285 | ASTM D217 |
| Rust Protection, 48 h @ 125 FRating | 0,0,0 | ASTM D1743 |
| Texture/Consistency | PASS | VISUAL |
| Timken OK load, lb | 55 | ASTM D2509 |
| Water Washout, Loss @ 38 Cwt% | 3 | ASTM D1264 |
| Water Washout, Loss @ 79 Cwt% | 6 | ASTM D1264 |
| Pen worked X 100, 000, 1/16" holes, 0.1 mm | 330 | FTM 313 |
| Low Temperature Torque, Starting @ -73 C, Nm | 0.52 | ASTM D1478 |
| Low Temperature Torque, Running @ -73 C, Nm | 0.06 | ASTM D1478 |
Complete documentation
We email you the sheets listed below in a single archive. No account, no order required.
- SDS
- SDS
- TDS