Abstract
The thickness of the oil film formed between two meshing gear teeth can be calculated on the basis of the elastohydrodynamic lubrication (EHL) theory developed by Dowson. The calculation of the EHL film thickness between meshing gear teeth is based on isothermal and steady-state conditions; in reality, non-isothermal and transient conditions predominate. Thus it is necessary that the film thickness calculated by the EHL theory be compared with the measured value. In this study, the elastohydrodynamic oil films formed between a gear tooth and a sapphire plate were measured by an optical interference method. The agreement between the calculated film thickness and the measured value is recognized under the condition of low velocity.
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