Measurement of Elastohydrodynamic Oil Film Thickness and Wear in a Ball Bearing by the Strain Gage Method

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Abstract
A simple method of measuring elastohydrodynamic oil film thickness and wear in a ball bearing using only a preloaded bearing and a strain gage is presented. In order to illustrate this method, measured lubricant film thickness as a function of bearing speed for several different oils are given and compared to theoretical values. Wear data, based on measured wear in an actual bearing, are also presented.

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