Preventing unplanned Shut-Downs due to Uncontrolled Electrical Discharge through Rolling Element Bearings

The presentation will give an overview of bearing failures attributed to uncontrolled discharge currents, including phenomena such as electrical erosion, fluting of raceways, lubricant aging and white etching cracks. Additionally, the presentation will explore the risk of electromagnetic interference resulting from these discharge currents on bearing performances is discussed. As preventive countermeasure, Schaeffler developed solutions to mitigate electrical damage, including hybrid bearings and current insulated coatings (e.g. InsutectTM). These innovative industrial solutions allow to divert current away from potential or strategic damage sites and is particularly useful in high-speed motors and generators exposed to these electromagnetic interferences. Structures, materials and characteristics of these dedicated Schaeffler’s components will be described in details focusing on their performances and associated costs. Industrial example of balance benefit will be given. You will gain comprehensive insights into the challenges of preventing bearing damage from stray currents and learn about Schaeffler's innovative insulation solutions developed to address these challenges effectively while minimizing costs and maintaining mechanical performance.