Pilatus 908.21.02.103 Grease - 4.4 lb Can

This supreme performance, high temperature, antiwear grease combines the unique features of a polyalphaolefin (PAO) synthetic base fluid with an organo-clay (non-soap) thickener. The wax-free nature of the synthetic base fluid, together with its low coefficient of traction compared with mineral oils, provides excellent low temperature pumpability, very low starting and running torque, and the potential to reduce operating temperatures in the load zone of rolling element bearings. The clay thickener provides excellent stability at high temperatures and Mobilgrease 28 has a high dropping point value of 260°C. In addition, it resists water washing, provides superior load-carrying ability, reduces frictional drag, and prevents excessive wear. Tests show that Mobilgrease 28 prevents friction oxidation (fretting) and lubricates rolling element bearings under conditions of high speeds and temperatures. It shows superior ability to lubricate heavily loaded sliding mechanisms, such as wing flap screwjacks. Its consistency is between an NLGI No. 1 and No. 2 grease.

Mobilgrease 28 meets the quality level of U.S. Military Specification MIL-G-81322E, General-Purpose, Aircraft, and is approved against U.S. Military Specification DOD-G-24508A (Navy) for shipboard auxiliary machinery. It can be designated U.S. Military Symbol WTR and NATO Symbol G-395.

Test Methods Mobilgrease 28 (1) MIL-PRF-81322 Limits NLGI Grade 1 1/2 Thickener Type Clay (non-soap) Color Visual Dark Red Structure Visual Smooth, buttery Dropping Point, °C (°F) ASTM D 2265 315 (599) 232 (450) min Viscosity of Base Oil, cSt @ 40LC @ 100°C ASTM D 445 29.3 5.6 Low Temp. Torque at -54ºC (-65ºF), Nm (g-cm) Starting Running, after 1 Hr ASTM D 1478 0.83 (8500) 0.08 (800) 0.98 (10,000) max 0.098 (1,000) max Penetration @ 25ºC (77ºF), 60 Stoke Worked, mm/10 ASTM D 217 295 265-320 Extended Worked Penetration Stability, 100,000 Strokes, mm/10 FTM 313 302 350 max Oil Separation, 30 Hrs at 177ºC, wt % ASTM D 6184 2.5 2.0-8.0 Evaporation Loss, 22 Hrs at 177ºC, wt % ASTM D 2595 6 10 max Copper Strip Corrosion, 24 Hrs at 100ºC ASTM D 4048 Pass 1 lb max Four-Ball Wear, Scar dia, mm ASTM D 2266 0.5 0.8 max Load Wear Index, kgf ASTM D 2596 42 30 min Rust Protection, 48 Hrs at 125ºF, › 1mm dia Corrosion Spots ASTM D 1743 Pass 0 Water Washout, 1 Hr at 41ºC, wt % ASTM D 1264 1 20 max High Temperature Performance, Hrs at 177ºC ASTM D 3336 Pass 400 min Oxidation Stability, pressure drop in kPa 100 Hrs at 99ºC 500 Hrs at 99ºC ASTM D 942 Pass Pass 83 max 172 maxx Storage Stability, 6 months at 38ºC FTM 3467 Pass Pass Dirt Count, Particles/mL 25-74 Micron 75 Micron or Larger FTM 3005 Pass 0 0 0 Oscillation Friction and Wear, Scar Dia, 35,000 cycles, 90º Angle, Aluminum Bronze Block, mm Modified ASTM D 3704 Pass 6.35 max Rubber Swell, L Type Synthetic, 1 week at 70ºC (158ºF), vol % FTM 3603 6 10 max

(1) Values may vary within modest ranges

Material Safety Data Sheets (MSDS)