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 2 in an NLGI No. 2 grade and is preferred in most cases for application by hand packing or by grease gun. UNIREX N 3 is an NLGI No. 3 grade often used for special applications such as sealed-for-life electric motor bearings, vertically mounted bearings, and higher-speed applications. 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.
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.
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
UNIREX N 2 is an NLGI No. 2 grade and is preferred in most cases for application by hand-packing or by grease gun. 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.
UNIREX N 3 is an NLGI No. 3 grade and is used for special applications such as sealed-for-life bearings, vertically-mounted bearings, and higher-speed bearings.
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:
DIN 51825:2004-06 – K 2 N -20 L
DIN 51825:2004-06 – K 3 N -20 L
ISO 6743-9: 2003 L-XBDHA 2
ISO 6743-9: 2003 L-XBDHA 3
Properties and Specifications
Base Oil Viscosity of Greases @ 40 C, mm2/s, AMS 1697
Dropping Point, °C, ASTM D2265
Oil Separation, 30 h @ 100 C, mass%, ASTM D6184
Penetration, 100 KX, 0.1 mm, ASTM D217
Penetration, 60X, 0.1 mm, ASTM D217
SKF Emcor Rust Test, Distilled Water, Bearing 1, ASTM D6138
SKF Emcor Rust Test, Distilled Water, Bearing 2, ASTM D6138
Viscosity Index, ASTM D2270
Water Resistance, 1 h @ 79 C, wt%, ASTM D1264
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
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