Mobil™ Polyree EM

Mobil grease , Japan

Electric Motor Bearing Grease

Product Description

Super-premium Mobil Polyree 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 Polyree EM offers 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 Polyree EM provides protection against rust and corrosion.
Low-noise properties	Mobil Polyree EM is suitable for lubrication of ball bearings in many noise-sensitive applications

Applications

Mobil Polyree EM is recommended by many major bearing and electric motor manufacturers for long-life lubrication of electric motor ball and roller bearings.

Mobil Polyree EM has 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 Polyree EM for ball or roller bearings operating in noise sensitive environments

Specifications and Approvals

This product meets or exceeds the requirements of:
DIN 51825: 2004-06 K2P-20

Properties and Specifications

Property
Grade	NLGI 2
Thickener Type	Polyurea
SKF Emcor Rust Test, 10% Synthetic Sea Water, ASTM D6138	0 , 1
Oil Separation, 0.25 psi, 24 h @ 25 C, mass%, ASTM D1742	0.5
Copper Strip Corrosion, 24 h, 100 C, Rating, ASTM D4048	1A
Penetration, Change from 60X to 100,000X, 0.1 mm, ASTM D217	40
Corrosion Preventive Properties, Rating, ASTM D1743	Pass
Color, Visual	Blue
Lubrication Life @ 177 C, h, ASTM D3336	750+
Water Washout, Loss @ 79 C, wt%, ASTM D1264	1.9
Low Temperature Torque, Starting, -29 C, g-cm, ASTM D1478	7500
Low Temperature Torque, Running, -29 C, g-cm, ASTM D1478	800
Dropping Point, °C, ASTM D2265	260
Penetration, 60X, 0.1 mm, ASTM D217	285
Viscosity @ 100 C, Base Oil, mm2/s, ASTM D445	12.2
Viscosity @ 40 C, Base Oil, mm2/s, ASTM D445	115
Four-Ball Wear Test, Scar Diameter, mm, ASTM D2266	0.41
Viscosity Index, ASTM D2270	95

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.

07-2023

ExxonMobil Japan Godo Kaisha

Shinagawa Grand Central Tower

2-16-4, Konan, Minato-Ku,

Tokyo, 108-8218,

Japan

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.