 Mobilgrease 33 Synthetic Aviation Grease Product Description Mobilgrease 33 is a high-performance lithium-complex grease designed for general-purpose aircraft use. Its consistency is between the NLGI grades 1 ａnd 2. Mobilgrease 33 utilizes a 100% polyalphaolefin base oil ａnd premium additives which ensure outstanding lubrication performance over a wide temperature range ａnd operating conditions. Features ａnd Benefits The lithium complex thickener system provides excellent structural stability ａnd resistance to water wash-out. Polyalphaolefin base oil is used in Mobilgrease 33 because of its exceptional thermal/oxidative resistance potential, low volatility, ａnd superb low-temperature capability, without the potential vulnerability of an ester base oil to degradation from reaction with water. The synthetic polyalphaolefin base oil offers excellent low-temperature mobility/pumpability ａnd very low starting ａnd running torque values. In addition, the state-of-the art additive system in Mobilgrease 33 provides superior rust ａnd wear protection ａnd load-carrying capacity compared to aviation greases that meet the minimum requirements of the MIL-PRF-23827 specification. Mobilgrease 33, with its unique features, provides the following advantages ａnd potential benefits: | Features | Advantages ａnd Potential Benefits | | High viscosity index polyalphaolefin basestock | Very wide operating temperature range - outstanding high ａnd low temperature performance.
Excellent lubricant film protection at high temperatures | | Good storage stability | Grease structure integrity maintained - low oil separation | | Exceptional resistance to thermal ａnd oxidative degradation | Long grease ａnd lubricated part service life | | Resistance to degradation by water (hydrolysis) | No risk of corrosion induced by acidic base oil degradation products | | Low volatility | Little vulnerability to significant base oil loss by evaporation in service | | Excellent protection against wear, corrosion, ａnd rusting | Excellent bearing ａnd component protection | | Extreme-pressure characteristics | Prevention of excessive wear, even under shock load | | High resistance to water washout | Excellent grease performance in adverse weather ａnd other water-exposure conditions | 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 3-33B (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. Specifications ａnd Approvals | Mobilgrease 33 | Is Approved Against | Meets | | Airbus AIMS09-06-002 | X | | | Boeing BMS 3-33B Type 1 | X | | | MIL-PRF-23827C, Amendment 2, Type I | X | | | NATO G-354 | X | | | SAE AMS3052 | | X | Typical Properties | | Test Methods | Boeing BMS 3-33B Requirements | MIL-PRF-23827 Type I Requirements | Airbus AIMS09-06-002/ SAE AMS3052 Requirements | Mobilgrease 33 (1) | | NLGI Grade | | | | | 1 1/2 | | Thickener Type | | Lithium Complex | Metallic Soap | Lithium Complex | Lithium Complex | | Color | Visual | Green to Blue | | Blue Green | Blue Green | | Structure/Consistency | Visual | Smooth, free from visible air bubbles | Smooth, free from lumps ａnd visual impurities | Smooth, free from lumps ａnd visual impurities | Pass | | Odor | Olfactory | No rancid, perfume, or alcohol odor | No rancid, perfume, or alcohol odor | | Pass | | Viscosity of Base Oil, cSt | ASTM D 445 | | | | | | at 40 ºC | | | | | 12.5 | | at 100 ºC | | | | | 3.2 | | Dropping Point, ºC (ºF) | ASTM D 2265 | 205 (401) min | 165 (329) min | 200 (392) min | 255 (491) | | Low Temp. Torque at -73ºC (-100ºF), Nm | DEF STAN 05-50 Part 62, ASTM D 1478 | | | | | | Starting | | 0.75 max | 1.00 max | 0.75 max | 0.52 | | Running, after 1 Hr | | 0.10 max | 0.10 max | 0.10 max | 0.06 | | Low Temp. Torque with 10% water at -73ºC (-100ºF), Nm | DEF STAN 05-50 Part 62, ASTM D 1478 | | | | | | Starting | | | | 1.00 max | 0.67 | | Running, after 1 Hr | | | | 0.20 max | 0.09 | | Penetration at 25ºC (77ºF), mm/10 | DEF STAN 05-50 Part 63, ASTM D 217 | | | | | | Unworked | | | 200 min | | 285 | | 60 Strokes Worked | | 265-315 | 270-310 | 265-315 | 292 | | 100,000 Strokes Worked | FTM 313 | 265-385 | 270-375 | Report | 330 | | Penetration, 100,000 Strokes Worked with 10% water, mm/10 | DEF STAN 05-50 Part 63, ASTM D 217 | | | Report | 330 | | Oil Separation, 30 Hrs at 100ºC, wt % | ASTM D 6184 | 8 max | 5 max | 6 max | 4 | | Evaporation Loss, 22 Hrs at 100ºC, wt % | ASTM D 2595 | | 2 max | | 1 | | Evaporation Loss, 500 Hrs at 121ºC, wt % | ASTM D 2595 | 10 max | | 10 max | 8.7 | | Copper Strip Corrosion, 24 Hrs at 100ºC | ASTM D 4048 | 1b max | 1b max | 1b max | 1b | | AMS4640 Al/Ni Bronze Corrosion, 24 Hrs at 100ºC | ASTM D 4048 | No appearance change | | No appearance change | Pass | | Four Ball Wear, scar dia., 1200rpm/40kg/1hr/75ºC, mm | ASTM D 2266 | 0.9 max | | 0.90 max | 0.4 | | Load Wear Index, kgf | ASTM D 2596 | 60 min | 30 min | 60 min | 110 | | Weld Load, kgf | ASTM D 2596 | | | 280 min | 700 | | Timken OK Load, lbf | ASTM D 2509 | 50 min | | | 55 | | Rust Protection, 48 Hrs at 125ºF, ›1mm dia Spots | ASTM D 1743 | | 0 in 2 out of 3 bearings | | 0,0,0 | | SKF EMCOR Rust, 3% NaCl, rating | ASTM D 6138 | 0, 0 | | 0, 0 | 0,0 | | Water Washout, 1 Hr at 38ºC (100 ºF), wt % | ASTM D 1264 | | 20 max | | 3 | | Water Washout, 1 Hr at 79ºC (174 ºF), wt % | ASTM D 1264 | 7.5 max | | 10 max | 6 | | High Temperature Performance, Hrs at 121ºC | ASTM D 3336 | 1,000 min | 1,000 min | 1,000 min | 2,200+ | | Oxidation Stability, pressure ｄrop in kPa | ASTM D 942 | | | | | | 100 Hrs at 99ºC | | 70 max | 70 max | 50 max | 11 | | 500 Hrs at 99ºC | | 105 max | 105 max | 105 max | 25 | | Fretting Wear, mg loss | ASTM D 4170 | 0.9 max | | Report | 0.6 | | Dynamic Bearing Life, No of cycles | BMS 3-33-8.2 | 30,000 min | | | Pass | | Navy Gear Wear Test, mg loss/1000 cycles | FTM 335 | | | | | | 2.3 kg load | | | 2.5 max | | 1.1 | | 4.5 kg load | | | 3.5 max | | 1.6 | | Dirt Count, Particles/mL | FTM 3005 | | | | | | 25-74 Micron Size | | 1000 max | 1000 max | | 0 | | 75 Micron or Larger | | 0 | 0 | | 0 | | Storage Stability, 6 months at 40ºC, Penetration, mm/10 | FTM 3467 | | | | | | Unworked | ASTM D 217 | 200 min | 200 min | | 289 | | 60x worked | ASTM D 217 | | | | 288 | | 60x worked, Difference from Unworked | ASTM D 217 | ±30 | | | -1 | | Difference from Original | ASTM D 217 | | ±30 | ±30 | 2 | | Elastomer Compatibility, 168 Hrs at 70ºC, % vol change | FTM 3603 | | | | | | Nitrile (NBR-L, AMS3217/2) | | -2.0 to +25.0 | | -2.0 to +25.0 | +12.6 | | Thermoplastic Compatibility, 70 Hrs at 100ºC, % vol change | ASTM D 4289 | | | | | | Hytrel 6356 + 0.5% carbon black | | ± 5.0 | | | 3.4 | | Delrin 100 AF (ASTM D 4181) | | ± 2.0 | | | +0.1 | | PTFE (Teflon) (AMS 3652) | | ± 2.0 | | | +0.1 | | Nylatron GS | | ± 1.0 | | | -0.5 | | (1) Values may vary within modest ranges | | | | | | Health ａnd Safety Based on available toxicological information, this product is not expected to produce adverse effects on health when used ａnd handled properly. Information on use ａnd handling, as well as health ａnd safety information, can be found in the Material Safety Data Sheet (MSDS), which can be obtained from your local distributor or via the Internet on http://www.exxonmobil.com/lubes. The ExxonMobil logotype ａnd Mobilgrease are trademarks of Exxon Mobil Corporation, or one of its subsidiaries. 4-2013 Copyright © 2001-2013 Exxon Mobil Corporation. All rights reserved. |
