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 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|
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|
|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|
Health and Safety
Based on available information, this product is not expected to produce adverse effects on health when used for the intended application and the recommendations provided in the Material Safety Data Sheet (MSDS) are followed. MSDS’s are available upon request through your sales contract office, or via the Internet. This product should not be used for purposes other than its intended use. If disposing of used product, take care to protect the environment.
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