---
title: "Risk of Electrical Erosion from Stray Currents in Traction Systems"
date: 2026-07-22
description: "The Problem of Electrical Erosion Electric locomotives and EMUs use traction motors that generate stray currents. These currents flow through bearings, causing ..."
source: https://en.mshjzc.com/railway-transport-bearings/56188.html
---

# Risk of Electrical Erosion from Stray Currents in Traction Systems

## The Problem of Electrical Erosion

Electric locomotives and EMUs use traction motors that generate stray currents. These currents flow through bearings, causing electrical erosion—microscopic damage to raceways and rollers.

## Causes of Electrical Erosion

- Stray currents from traction motors
- Static electricity from friction
- Induced currents from catenary systems
- Grounding faults

## Consequences of Electrical Erosion

- Pitting (spot corrosion) on raceways
- Increased noise and vibration
- Premature wear
- Risk of bearing failure

## MS Bearing Solutions

- Ceramic insulating bearings (Si3N4)
- Bearings with insulating coating (aluminum oxide)
- Plastic separators with insulating properties
- Special greases with anti-corrosion additives

## MS Bearing Products

<table><tr><th>Type</th><th>Application</th><th>Features</th></tr><tr><td>Ceramic</td><td>Traction motors</td><td>Full insulation</td></tr><tr><td>Coated</td><td>Car axles</td><td>Cost-effective solution</td></tr><tr><td>With plastic separator</td><td>Generators</td><td>Additional insulation</td></tr></table>

12-month warranty.