Understanding Lube Oil Selection for Rolling Element Bearings

This video provides an in-depth discussion on lubrication for rolling element bearings, contrasting it with plain bearings and explaining the concept of hydrodynamic and elasto-hydrodynamic lubrication. It highlights the importance of selecting the correct lubricant viscosity to combat fatigue wear and extend bearing life, discussing the factors influencing film thickness, the calculation of kappa ratio, and the choice between oil and grease based on application requirements. Additionally, it outlines considerations for the lubricant's chemistry and compatibility with bearing materials, including the impact of additives on different bearing types.

00:00 Introduction to Lubrication for Rolling Element Bearings
00:12 Understanding Hydrodynamic and Elasto Hydrodynamic Lubrication
01:10 The Role of Viscosity in Lubrication
02:50 The Impact of Fatigue Wear on Rolling Element Bearings
04:43 The Importance of Viscosity Selection
05:16 Calculating Lubricant Film Thickness
07:10 Understanding the Kappa Ratio
09:12 Choosing Between Oil and Grease for Lubrication
11:41 Rules of Thumb for Lubrication Selection
12:14 Selecting the Right Chemistry for Lubrication

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