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.
Datasheets
Technical Resources
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Mobil Unirex N2 grease triples re-greasing interval and motor life| Mobil™To provide sufficient protection to equipment under severe conditions of high temperatures and humidity, ExxonMobil lube engineers recommend Mobil Unirex N2 grease for a large steel manufacturer.
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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.
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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 |
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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 |
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Excellent mechanical stability |
Exhibits excellent resistance to softening due to mechanical working |
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Excellent water and corrosion resistance |
Resists water washout and protects bearings against corrosion |
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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
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This product meets or exceeds the requirements of: |
2 |
3 |
|
DIN 51825:2004-06 - K 2 N -20 L |
X |
|
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DIN 51825:2004-06 - K 3 N -20 L |
|
X |
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ISO 6743-9: 2003 L-XBDHA 2 |
X |
|
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ISO 6743-9: 2003 L-XBDHA 3 |
|
X |
Properties and Specifications
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Property |
2 |
3 |
|
Grade |
NLGI 2 |
NLGI 3 |
|
Thickener Type |
Lithium Complex |
Lithium Complex |
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Color, Visual |
Green |
Green |
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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 |
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Viscosity Index, ASTM D2270 |
95 |
95 |
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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