Mobil Arapen RB 320 railroad car journal bearing grease offers the following features and benefits:

  • Approved against AAR specification AAR-942
  • Formulated for long service life over a wide range of climatic conditions
  • Exhibits excellent oxidation stability, shear stability, seal compatibility, and water resistance for extended grease life and equipment integrity


  • Roller bearings of railroad car journals where no provision is provided for in-service re-lubrication.
  • Factory fill lubricant of major railroad journal bearing manufacturers


Mobil Arapen RB 320 has the following builder approvals:
AAR-942 X

Typical Properties

Mobil Arapen RB 320
NLGI Grade 1.5
Thickener Type Lithium/Calcium soap
Color, Visual Light Amber
Penetration, Worked, 25º C, ASTM D 217 305
Dropping Point, ºC, ASTM D 2265 180
Viscosity of Oil, ASTM D 445
cSt @ 100º C 14.7
Penetration, ASTM D 217, Change from 60X to 100,000X, mm/10 +20
Emcor Rust, ASTM D 6138, Distilled Water 0/0
Oxidation Stability, ASTM D 942:
- pressure drop at 100 hrs, psi 1
- pressure drop at 500 hrs, psi 3


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The Lubricant Store Store
buying for a customer, who requested it.
Barry K on Mar 4, 2019
buying for a customer, who requested it.
Barry K on Mar 4, 2019