Unirex N 3

High Temperature Bearing Grease

UNIREX™ N greases are premium-quality, lithium-complex products suitable for high-temperature service in rolling-element bearings. These versatile greases can be used in a wide range of industrial applications and are particularly recommended for electric-motor lubrication.

 

UNIREX N greases are not intended to be used under extreme pressure conditions where extra anti-welding properties are required.

 

UNIREX N 2 meets the requirements of Lubricating Grease DIN 51825 - K2N - 20L and ISO L-XBDHA 2.

 

UNIREX N 3 meets the requirements of Lubricating Grease DIN 51825 - K3N - 20L and ISO L-XBDHA 3.

 

Equipment lubricant recommendations

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Data sheets

Features and Benefits

Unirex N greases exhibit excellent high and low temperature performance, resistance to water and corrosion, and long service life in a range of bearing applications.

 

Features

Advantages and Potential Benefits

Excellent high-temperature performance

Lithium-complex thickener resists softening / running out of bearings at temperatures up to 190°C

Outstanding grease life

Laboratory bearing rig tests show outstanding continuous lubrication performance at bearing temperatures of up to 140°C

Very good low-temperature characteristics

Start-up power requirements are low at temperatures down to at least -20°C. Meets DIN 51825 low temperature torque requirements at -20°C

Excellent mechanical stability

Exhibits excellent resistance to softening due to mechanical working

Excellent water and corrosion resistance

Resists water washout and protects bearings against corrosion

Excellent performance in high-speed applications

Channelling characteristics provide excellent performance in high- speed deep-groove ball bearings. Unirex N3 is recommended where DmN (mean bearing diameter X rpm) exceeds 360,000

 

Applications

UNIREX N 2 is recommended for the lubrication of electric motors. It is suitable for NEMA (National Electric Manufacturer's Association) Insulation Class A, B, and F motors.

 

Most of the uses for UNIREX N involve manual methods of application. Although UNIREX N 2 is suitable for use in automatic centralized systems, equipment served by these systems would normally not require the long-life properties of UNIREX N, since one of the functions of automatic systems is to replenish the lubricant at relatively short time intervals. UNIREX N 3 should not be used in such systems.

 

Specifications and Approvals

This product meets or exceeds the requirements of:

2

3

DIN 51825:2004-06 - K 2 N -20 L

X

DIN 51825:2004-06 - K 3 N -20 L

X

ISO 6743-9: 2003 L-XBDHA 2

X

ISO 6743-9: 2003 L-XBDHA 3

X

 

Properties and Specifications

Property

2

3

Grade

NLGI 2

NLGI 3

Thickener Type

Lithium Complex

Lithium Complex

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

115

115

Color, Visual

Green

Green

Dropping Point, °C, ASTM D2265

230

230

Oil Separation, 30 h @ 100 C, mass%, ASTM D6184

1.5

0.6

Penetration, 100 KX, 0.1 mm, ASTM D217

25

30

Penetration, 60X, 0.1 mm, ASTM D217

280

235

SKF Emcor Rust Test, Distilled Water, Bearing 1, ASTM D6138

0

0

SKF Emcor Rust Test, Distilled Water, Bearing 2, ASTM D6138

1

1

Viscosity Index, ASTM D2270

95

95

Water Resistance, 1 h @ 79 C, wt%, ASTM D1264

3.7

3.5

 

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