Film thickness of mechanically worked lubricating grease at very low speeds

H. Cen, Pieter Martin Lugt, G.E. Morales-Espejel

Research output: Contribution to journalArticleAcademicpeer-review

32 Citations (Scopus)

Abstract

Several different types of commercially available greases, aged in a roll stability tester, have been tested in a ball-on-disc machine where the film thickness was measured using the interferometry method. The grease film thickness at very low speed is thicker than the base oil film thickness due to the contribution of the thickener in this regime, which practically vanishes at higher speeds. The (mechanical) aging process reduces the thickener material, decreasing the grease film thickness at very low speeds (entrainment speed less than 0.01 m/s) with aging time, whereas no significant difference was found at higher speeds where the grease film thickness still approached the calculated base oil film thickness
Original languageEnglish
Pages (from-to)1066-1071
JournalTribology transactions
Volume57
Issue number6
DOIs
Publication statusPublished - 2014

Keywords

  • METIS-310037
  • IR-95840

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