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UNIREX N Series 2 20L

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UNIREX™ N Series 

High Temperature Bearing Grease

Product Description

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.

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 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

Unirex N Series meets or exceeds the requirements of: 2 3
DIN 51825: (2004-06) K2N-20L K3N-20L

 

Typical Properties

UNIREX N 2 3
Thickener Type Lithium-complex Lithium-complex
NLGI Grade 2 3
Color, Visual Green Green
Texture Smooth, Buttery Smooth, Buttery
Dropping Point, ASTM D 2265, °C 230 230
Base Oil Viscosity, ASTM D 445, cSt @ 40°C 115 115
Base Oil Viscosity Index, ASTM D 2270 95 95
Penetration, worked 60 stokes, ASTM D 217, mm/10 280 235
Penetration change after 100,000 strokes, ASTM D 217, mm/10 25 30
Oil Separation, ASTM D 6184, mass % @ 100°C / 30 hrs 1.5 0.6
EMCOR Corrosion , ASTM D 6138 (Distilled Water), rating 0,1 0,1
Water Washout @ 79°C, ASTM D 1264, mass % 3.7 3.5