Mobil Polyrex EM 103
Mobil Polyrex EM 103 is a super-premium polyurea grease specifically formulated for electric motor bearings requiring a slightly stiffer consistency. It is designed using advanced thickener technology and proprietary manufacturing techniques to deliver extended grease life, excellent durability and reliable lubrication performance in demanding operating environments.
One of the key advantages of Mobil Polyrex EM 103 is its outstanding grease life. The formulation provides long-lasting lubrication for ball and roller bearings, particularly in sealed-for-life applications and electric motors operating at elevated temperatures. This helps reduce maintenance requirements and extend equipment life.
Mobil Polyrex EM 103 also features an advanced polyurea thickener system. This provides excellent resistance to mechanical shear, maintaining grease structure and lubrication performance over extended operating periods. This helps ensure consistent bearing protection under demanding conditions.
Another important benefit is its excellent corrosion resistance. The grease protects bearings from rust and corrosion, supporting reliable operation in humid environments and applications exposed to mild water contamination.
Mobil Polyrex EM 103 is particularly recommended for vertically mounted bearings and very large electric motors where a stiffer grease consistency is required by OEMs. It is also suitable for fin fan bearings, high-temperature pump bearings and sealed-for-life bearing applications.
Mobil Polyrex EM 103 delivers excellent performance in high-temperature applications, maintaining lubrication performance and resisting oil separation. Its balanced formulation ensures durability and long service life in electric motor applications operating under heavy-duty conditions.
Physical characteristics include an NLGI 3 consistency with a polyurea thickener and blue colour. Mobil Polyrex EM 103 has a dropping point of approximately 270°C and a worked penetration of approximately 250 (0.1 mm). The grease features a base oil viscosity of approximately 115 mm²/s at 40°C and 12.2 mm²/s at 100°C, with a viscosity index of around 95. Additional properties include oil separation of approximately 0.1%, water washout of approximately 0.8% and four-ball wear scar of approximately 0.6 mm, supporting long service life in electric motor applications.
