Browsing: bearing failure modes

This engineering guide details the criteria for specifying insulated bearings to prevent electrical erosion in motors. It covers critical triggers like VFD usage and motor size (>100 HP), compares protection methods, and outlines industry standards for NDE (Non-Drive End) installation.

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 technical guide examines the chemical process of electrical grease breakdown in VFD motors, explaining how arc discharge causes thermal cracking and carbonization, and how to distinguish this from mechanical overheating.

This guide analyzes the impact of electrical stress on wind turbine generator bearings, comparing Hybrid Ceramic and Plasma-Coated solutions to prevent White Etching Cracks (WEC) and reduce costly offshore maintenance logistics.

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.

Electric motors—especially…

How They Work, Why They Ma…