Browsing: bearing pitting

This guide defines stray current in motors and explains its link to VFD operation and shaft voltage buildup. It details the resulting damage—such as electrical pitting and fluting—and provides actionable mitigation strategies, including shaft grounding rings and hybrid ceramic bearings, to extend motor reliability.

This complete guide explains the definition, materials (such as Aluminum Oxide), and structure of a bearing insulation layer. It details how these layers block harmful electrical currents to prevent EDM damage and extend motor life in industrial applications.

This guide explains how to differentiate between electrical erosion (EDM) and mechanical fatigue in bearings by analyzing microscopic pitting patterns, auditory signs, and failure locations to ensure the correct maintenance solution is applied.

This diagnostic guide details how to distinguish VFD-induced electrical bearing damage from mechanical failure through visual inspection of fluting, vibration analysis, and shaft voltage testing.

This guide explains the mechanism of VFD-induced electrical stress on motor bearings and details how insulated bearings prevent failures like EDM and fluting. It provides actionable advice on selecting the right insulation technology based on motor size, application, and drive frequency to ensure long-term reliability.