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

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

Color, Visual

Green

Green

Dropping Point, °C, ASTM D2265

210

210

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, ASTM D6138

0 , 1

0 , 1

Viscosity @ 100 C, Base Oil, mm2/s, ASTM D445

12.2

12.2

Viscosity @ 40 C, Base Oil, mm2/s, ASTM D445

115

115

Viscosity Index, ASTM D2270

95

95

Water Washout, Loss @ 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