High Temperature Bearing Grease
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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.
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.
|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|