Browsing: microwelding

This technical guide explores the mechanics of EDM bearing damage (electrical erosion) caused by stray shaft voltages in VFD applications. It outlines critical symptoms such as fluting and pitting, while offering proven prevention strategies like insulated bearings and shaft grounding rings.

This technical guide explains the destructive physics of “microwelding” caused by electrical arcing in bearings, detailing how VFDs and improper grounding melt raceways and how to prevent this damage.

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.