How to extend the life of your motor bearings
What happened
An ABB Australia technical piece explains how variable speed drives (VSDs) can shorten motor‑bearing life through common‑mode shaft currents and describes mitigation options like shaft grounding devices, grounding brushes and bearing isolators. The article gives actionable installation guidance and notes insulated bearings as a recommendation for larger motors. Procurement should watch supplier offers for grounded or pre‑isolated motor variants and require separable pricing for mitigation hardware
Why the category manager should care
Force preventative hardware (shaft grounding/isolators) and spare‑parts into supplier quotes rather than relying on aftermarket fixes
Key facts
- Describes common‑mode voltage and shaft current damage pathways
- Recommends shaft grounding devices and bearing isolators as mitigations
- Advises insulated bearings on the opposite end for larger motors