Effect of base oil viscosity of grease on lubricating condition of ball type linear motion rolling bearing

Hideaki Ohno, Susumu Matsumoto

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In the ball type linear motion rolling bearing, no methods of selecting the grease considered the lubricated condition. The ball type linear motion rolling bearing and the ball bearing usually have similar defective modes. In the ball bearing, the wear life and the friction loss depend on the lubricated condition at the rolling contact area. So, the influence of the viscosity of the base oil which forms the oil film at the rolling contact area in the ball type linear motion rolling bearing was examined. Results reveal that the speed of forming the oil film depends not only on the thickener, but on the viscosity of the base oil. Moreover, when the calculated (the ratio of elastohydrodynamic oil film thickness and average roughness of two surfaces) is less than 0.6, the lubricated condition deteriorates. Therefore, when selecting the grease for the ball type linear motion rolling bearing, it is necessary to consider the viscosity and the lubricating condition of the base oil.

Original languageEnglish
Pages (from-to)371-377
Number of pages7
JournalToraibarojisuto/Journal of Japanese Society of Tribologists
Volume56
Issue number6
Publication statusPublished - 2011 Jun 15

Keywords

  • Base oil
  • Electric conductivity
  • Grease
  • Linear motion rolling bearing
  • Oil film formation speed
  • Oil film parameter
  • Viscosity

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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