Mobil Polyrex EM Grease

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Mobil Polyrex EM Grease
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Mobil

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Mobil Polyrex EM is a blue in color NLGI 2 polyurea grease 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. 

Tubes contain 13.7oz (388g) each. 

Benefits: 

  • Outstanding grease life: Outstanding long-life, high-temperature lubrication of ball and roller bearings, particularly in sealed-for-life applications. 
  • Advanced polyurea thickener: Increased durability versus conventional polyurea greases when subjected to mechanical shear forces. 
  • Excellent corrosion resistance: Provides protection against rust and corrosion. Provides additional protection under mild salt-water wash conditions. 
  • Low-noise properties: Suitable for lubrication of ball bearings in many noise-sensitive applications. 

Applications: 

  • 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 
Typical Properties  Mobil Polyrex EM 
NLGI Grade  2 
Color  Blue 
Base Oil Viscosity, ASTM D 445   -
cSt @ 40C  115 
cSt @ 100C  12.2 
Viscosity Index, ASTM D 2270  95 
Penetration, ASTM D217 worked, 60x, mm/10  285 
Penetration Change after 100.000 strokes, ASTM D217, mm/10  40 
Dropping Point, ASTM D 2265, C (F)  260 
Oil separation test, ASTM D 1742, %  0.5 
High Temperature Grease Life, ASTM D 3336, Hours @ 177C  750+ 
4-Ball Wear Scar, ASTM D 2266, @ 40kg, 1200 rpm, 75C, 1hr, mm  0.41 
Low Temperature Torque, ASTM D 1478, g-cm @ -29C   - 
Starting  7500 
Running  800 
EMCOR Corrosion Performance, 10% Synthetic Sea Water ASTM D 6138  0,1 (No Rust) 
Rust Protection, ASTM D 1743, Distilled Water  Pass 
Copper Corrosion Resistance, ASTM D 4048  1A 
Water Washout, ASTM D 1264, %  1.9 

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Product Data Sheet

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