Rolling-element bearings are the most commonly used components in all rotating machinery. The variations in the operating conditions such as an increase in the number of operating cycles, load, speed, service temperature, and lubricant degradation result in the development of various defects such as pitting, spalling, scuffing, scoring, etc. The defects that appeared on rolling contact surfaces cause surface deterioration and change in the vibration and sound levels of the bearing system. The present experimental investigations are aimed at assessing the surface fatigue wear that appears on the contact surfaces of roller bearings. The studies considered the estimation of specific film thickness, analysis of surface fatigue wear developed on the rolling-element surfaces, surface roughness analysis, grease degradation analysis using Fourier transform infrared radiation, and vibration and sound signal measurement and analysis. The results obtained from the experimental investigation provide a good correlation between surface wear, vibration, and sound signals with a transition in the lubrication regimes in the Stribeck curve.

滚动轴承是所有旋转机械中最常用的组件。工作条件的变化（例如，工作循环次数的增加，负载，速度，使用温度和润滑剂的降解）会导致出现各种缺陷，例如出现点蚀，剥落，划伤，划痕等。出现的缺陷滚动接触面上的轴承会导致表面变质，并改变轴承系统的振动和声级。本实验研究旨在评估出现在滚动轴承接触表面上的表面疲劳磨损。这些研究考虑了比膜厚度的估算，对滚动体表面产生的表面疲劳磨损的分析，表面粗糙度分析，使用傅立叶变换红外辐射对油脂降解进行分析，并对振动和声音信号进行测量和分析。从实验研究中获得的结果提供了表面磨损，振动和声音信号之间的良好相关性，并且在Stribeck曲线中出现了润滑状态的过渡。