Mobil Polyrex EM
Electric motor bearing grease
Product Description
Super-premium Mobil Polyrex™ EM Series greases are specially formulated for electric-motor bearings. The advanced thickener formulation and proprietary manufacturing techniques provide
- improved bearing performance and protection for long electric motor life.
- Outstanding grease life
- Advanced polyurea thickener
- Excellent corrosion resistance
- Low-noise properties
Features and Benefits
- Outstanding long-life, high-temperature lubrication of ball and roller bearings, particularly in sealed-for-life applications
- Increased durability versus conventional polyurea greases when subjected to mechanical shear forces
- Mobil Polyrex EM and Mobil Polyrex EM 103 provide protection against rust and corrosion. Mobil Polyrex EM provides additional protection under mild salt-water wash conditions versus Polyrex EM 103
- Mobil Polyrex EM is suitable for lubrication of ball bearings in many noise-sensitive applications
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.
- Mobil Polyrex EM 103 is more specifically recommended for applications such as vertically mounted bearings, or very large motors where a stiffer grease consistency may be required by the OEM.
- Key applications include:
- Electric motor bearings
-
- Fin fan bearings
- High-temperature pump bearings
- Factory-filled, sealed-for-life ball bearings
- Ball or roller bearings operating at high temperatures where low oil separation is required
- Mobil Polyrex EM for ball or roller bearings operating in noise sensitive environments
Technical specifications
| Grade | NLGI 2 |
| Thickener Type | Polyurea |
| Color, Visual | Blue |
| Copper Strip Corrosion, 24 h, 100 C, Rating, ASTM D4048 | 1A |
| Corrosion Preventive Properties, Rating, ASTM D1743 | PASS |
| Dropping Point, °C, ASTM D2265 | 260 |
| Four-Ball Wear Test, Scar Diameter, mm, ASTM D2266 | 0.41 |
| Low Temperature Torque, Running, -29 C, g-cm, ASTM D1478 | 800 |
| Low Temperature Torque, Starting, -29 C, g-cm, ASTM D1478 | 7500 |
| Lubrication Life @ 177 C, h, ASTM D3336 | 750+ |
| Oil Separation, mass%, ASTM D1742 | 0.5 |
| Penetration, 60X, 0.1 mm, ASTM D217 | 285 |
| Penetration, Change from 60X to 100,000X, 0.1 mm, ASTM D217 | 40 |
| SKF Emcor Rust Test, 10% Synthetic Sea Water, ASTM D6138 | 0.1 |
| Viscosity @ 100 C, Base Oil, mm2/s, ASTM D445 | 12.2 |
| Viscosity @ 40 C, Base Oil, mm2/s, ASTM D445 | 115 |
| Viscosity Index, ASTM D2270 | 95 |
| Water Washout, Loss @ 79 C, wt.%, ASTM D1264 | 1.9 |
Datasheets
