Mobil Unirex N 3

Standards & approvals

• DIN 51825 K3N-20L

  Lubricating grease K3N-20L — DIN 51825

  Grease class DIN 51825: K = bearings, 3 = NLGI grade, N = maximum temperature, -20 = minimum temperature.

• ISO 12924 L-XBDHA 3

  Grease classification L-XBDHA 3 — ISO 12924

  ISO 12924 grease code: X = grease, the following letters = lowest and highest service temperature, water resistance and EP performance, the final figure = NLGI grade.

Specifications

Brand

Mobil (ExxonMobil)

Range

Unirex

Category

Industrial greases

Viscosity

NLGI 3

Manufacturer code

2015A0207230

Availability

On request

Typical characteristics

Manufacturer's description

Unirex N 3 is the premium lithium-complex grease of the ExxonMobil UNIREX N series in NLGI 3, for high-temperature service in rolling-element bearings. It is particularly suited to high-speed applications, its channelling characteristics giving excellent performance in deep-groove ball bearings, and is recommended where DmN (mean bearing diameter x rpm) exceeds 360,000. It should not be used in automatic centralised systems. It offers excellent high-temperature performance (the lithium-complex thickener resists softening up to 190 °C) and low-temperature performance (low start-up torque down to at least -20 °C), mechanical stability, and resistance to water washout and corrosion. It meets DIN 51825 K3N-20L and ISO 6743-9 L-XBDHA 3. It is not intended for extreme-pressure conditions requiring extra anti-welding properties.

Applications

• Recommended for the lubrication of electric motors, suitable for NEMA (National Electric Manufacturer's Association) Insulation Class A, B, and F motors.
• Most uses of Unirex N involve manual methods of application.
• Unirex N 2 is suitable for use in automatic centralised systems, although equipment served by these systems does not normally require Unirex N's long-life properties.
• Such systems replenish the lubricant at relatively short intervals, and Unirex N 3 should not be used in them.

Performance & benefits

• Excellent high- and low-temperature performance, resistance to water and corrosion, and long service life in a range of bearing applications.
• Very good low-temperature characteristics: start-up power requirements are low at temperatures down to at least -20°C, meeting DIN 51825 low-temperature torque requirements.
• Excellent mechanical stability and excellent water and corrosion resistance: resists softening from mechanical working, 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 N 3 is recommended where DmN (mean bearing diameter x rpm) exceeds 360,000.