Mobil Polyrex™ EM Series  

Mobil Grease, Canada

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.

 

Features and Benefits

Mobil Polyrex EM and Mobil Polyrex EM 103 offer the following features and benefits:

Features

Advantages and Potential 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

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

Low-noise properties

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.

 

Mobil Polyrex EM greases have been shown to be compatible with a number of ExxonMobil lithium complex greases, as well as competitive electric motor mineral polyurea products, as determined by the methodology of ASTM D6185.  For specific questions about grease compatibility, contact your Mobil representative.

 

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

 

Specifications and Approvals

This product meets or exceeds the requirements of:

MOBIL POLYREX EM

DIN 51825:2004-06 - K 2 P -20

X

 

Properties and Specifications

Property

MOBIL POLYREX EM

MOBIL POLYREX EM 103

Grade

NLGI 2

NLGI 3

Thickener Type

Polyurea

Polyurea

Base Oil Viscosity of Greases @ 100 C, mm2/s, AMS 1700

12.2

12.2

Base Oil Viscosity of Greases @ 40 C, mm2/s, AMS 1697

115

115

Color, Visual

Blue

Blue

Copper Strip Corrosion, 24 h, 100 C, Rating, ASTM D4048

1A

1A

Corrosion Preventive Properties, Rating, ASTM D1743

PASS

PASS

Dropping Point, °C, ASTM D2265

260

270

Four-Ball Wear Test, Scar Diameter, mm, ASTM D2266

0.6

Four-Ball Wear Test, Scar Diameter, 40 kg, 1200 rpm, 1 h, 75 C, mm, ASTM D2266

0.41

Low Temperature Torque, Running, -29 C, g-cm, ASTM D1478

800

1000

Low Temperature Torque, Starting, -29 C, g-cm, ASTM D1478

7500

9300

Lubrication Life @ 177 C, h, ASTM D3336

750+

750+

Oil Separation, mass%, ASTM D1742

0.5

0.1

Penetration, 60X, 0.1 mm, ASTM D217

285

250

Penetration, Change from 60X to 100,000X, 0.1 mm, ASTM D217

40

40

SKF Emcor Rust Test, ASTM D6138

0,1 (No Rust)

Viscosity Index, ASTM D2270

95

95

Water Washout, Loss @ 79 C, wt%, ASTM D1264

1.9

0.8

 

Health and Safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @ http://www.msds.exxonmobil.com/psims/psims.aspx

All trademarks used herein are trademarks or registered trademarks of Exxon Mobil Corporation or one of its subsidiaries unless indicated otherwise.

07-2019

Imperial Oil

Petroleum and Chemicals Division
Lubricants and Specialties
240 Fourth Ave SW
C. P. 2480, Station M
Calgary AB T2P 3 M 9

1-800-268-3183

Typical Properties are typical of those obtained with normal production tolerance and do not constitute a specification. Variations that do not affect product performance are to be expected during normal manufacture and at different blending locations. The information contained herein is subject to change without notice. All products may not be available locally. For more information, contact your local ExxonMobil contact or visit www.exxonmobil.com
ExxonMobil is comprised of numerous affiliates and subsidiaries, many with names that include Esso, Mobil, or ExxonMobil. Nothing in this document is intended to override or supersede the corporate separateness of local entities. Responsibility for local action and accountability remains with the local ExxonMobil-affiliate entities.

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