A trial of non-steady state EHL tester : Traction characteristics under the steady state conditions

Abstract

A noble ball-on-disk type EHL tester was built as a trial in order to study the traction characteristics under the steady state as well as the non-steady state conditions. Under the steady state conditions, the traction coefficient of the synthetic traction oil decreased with increasing temperature while it was little affected by change in contact pressure. This is probably because an EHL oil film behaved as a plastic solid. In addition, the influence of skew component and a kind of lubricant was studied. The experimental results were in good agreement with the previous reports.