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Grease Performance in Tapered Roller Bearings

[+] Author Affiliations
Michael R. Hoeprich

The Timken Company, Canton, OH

Paper No. WTC2005-64352, pp. 189-190; 2 pages
doi:10.1115/WTC2005-64352
From:
  • World Tribology Congress III
  • World Tribology Congress III, Volume 2
  • Washington, D.C., USA, September 12–16, 2005
  • Conference Sponsors: Tribology Division
  • ISBN: 0-7918-4202-9 | eISBN: 0-7918-3767-X
  • Copyright © 2005 by ASME

abstract

To gain insight into the physical aspects of grease lubrication, nine greases with different oil viscosity and thickener combinations were tested in a tapered rolling element bearing under a light thrust load at speeds of 1800 and 3600 RPM. Bearings were run for thirty days or until a 150°C rib temperature was reached. Using SEM analysis, thickener samples were taken after testing from the rib/roller and raceway contacts for comparison with the thickener in new grease. A post test infrared technique was also used to evaluate grease thickness at the rib/roller contact and was compared with calculated film thickness. Bearing operating temperatures were then compared with grease base oil viscosity and thickener type.

Copyright © 2005 by ASME

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