How to extend the life of your motor bearings
What happened
An ABB technical article explains that variable speed drives produce common‑mode voltage and shaft currents that can shorten motor bearing life. The author highlights mitigation options—shaft grounding devices and insulated bearings—and notes larger motors often need complementary measures. Watch supplier quotes for optional add‑ons and ensure those mitigations are treated as separable procurement items
Why the category manager should care
Treat grounding and insulated bearings as contract line items with acceptance tests and spares, not optional extras
Key facts
- Focus on common‑mode voltage and motor shaft current as mechanisms for bearing damage
- Recommends shaft grounding devices and insulated bearings as mitigations
- Notes larger motors typically need an insulated bearing opposite the grounding device