Petronas Grease LC 2
Lithium complex grease for high temperatures and humidity
NLGI 2
Mobil Polyrex EM Series are super-premium greases specially formulated for electric-motor bearings. Their advanced polyurea thickener formulation and proprietary manufacturing techniques provide improved bearing performance and protection for long electric motor life. The series comprises Mobil Polyrex EM (NLGI 2) and Mobil Polyrex EM 103 (NLGI 3), both meeting DIN 51825:2004-06 K 2 P -20. Both greases deliver outstanding grease life for long-term, high-temperature lubrication of ball and roller bearings, particularly in sealed-for-life applications, with lubrication life of 750+ hours in the ASTM D3336 test at 177°C. The advanced polyurea thickener offers increased durability versus conventional polyurea greases under mechanical shear, along with excellent corrosion resistance; Mobil Polyrex EM provides additional protection under mild salt-water wash conditions compared to EM 103, and also offers low-noise properties suited to noise-sensitive applications. Mobil Polyrex EM greases are recommended by many major bearing and electric motor manufacturers for long-life lubrication of electric motor ball and roller bearings, fin fan bearings, high-temperature pump bearings, and factory-filled, sealed-for-life ball bearings. Mobil Polyrex EM 103 is more specifically recommended for vertically mounted bearings or very large motors requiring a stiffer grease consistency. The greases have been shown to be compatible, per ASTM D6185, with a number of ExxonMobil lithium-complex greases and competitive mineral polyurea products.
| Property | Typical value | Method |
|---|---|---|
| Thickener type | Polyurea | |
| Colour | Blue | Visual |
| Copper strip corrosion, 24 h, 100 CRating | 1A | ASTM D4048 |
| Corrosion Preventive PropertiesRating | Pass | ASTM D1743 |
| Dropping point°C | 260 | ASTM D2265 |
| Four-Ball Wear Test, Scar Diametermm | 0.48 | ASTM D2266 |
| Low Temperature Torque, Running, -29 C, g-cm | 405 | ASTM D1478 |
| Low Temperature Torque, Starting, -29 C, g-cm | 3630 | ASTM D1478 |
| Lubrication life @ 177 Ch | 750+ | ASTM D3336 |
| Oil separation, 0.25 psi, 24 h @ 25 C, mass% | 0.5 | ASTM D1742 |
| Penetration, 60X, 0.1 mm | 285 | ASTM D217 |
| Penetration, change from 60X to 100, 000X, 0.1 mm | 40 | ASTM D217 |
| SKF Emcor Rust test, 10% Synthetic Sea Water | 0 , 1 | ASTM D6138 |
| Viscosity @ 100 C, Base oilmm2/s | 12.2 | ASTM D445 |
| Viscosity @ 40 C, Base oilmm2/s | 115 | ASTM D445 |
| Viscosity index | 95 | ASTM D2270 |
| Water Washout, Loss @ 79 Cwt% | 1.9 | ASTM D1264 |
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