The influence of lubrication fluctuation on the NRRO of the components of retainer rotation in a ball bearing

Shoji Noguchi, Yuuki Uehara

Research output: Contribution to journalArticle

1 Citation (Scopus)


The effect of lubrication fluctuation on the non-repetitive runout of retainer rotation in ball bearing was studied. The rotational speed was regarded as 1800/min with an inner ring rotation. The elastohydrodynamic film thickness at that time, when the inner bearing inner part temperature was 30°C, was ∼ 0.05 μm with VG22 oil, 0.18 μm with VG100, and 0.6 μm with VG460. Prior to injecting the lubrication oil (VG22 oil), both the torque and the cage frequency rotation (fc) component were small and stable, but at the moment they were injected, the torque and the fc component rapidly became large. When VG100 was injected, the torque increase at time of injection was more abrupt. When VG460 was injected, the values of the torque fluctuations were extremely great, and the fluctuation amplitude of the fc component accompanying them was also great.

Original languageEnglish
Pages (from-to)439-446
Number of pages8
JournalJapanese Journal of Tribology
Issue number4
Publication statusPublished - 1 Dec 2004

Cite this