How to extend the life of your motor bearings
What happened
A technical guidance piece explains how variable speed drives introduce common‑mode voltage and shaft currents that shorten motor bearing life. It highlights shaft grounding devices, carbon brushes and insulated bearings as practical mitigations and notes recommendations for larger motors. Watch vendor warranty requirements and whether procurement needs to specify preinstalled grounding or add-on devices
Why the category manager should care
Make shaft grounding and insulated bearings explicit on purchase specs and pick lists because VSDs create a repeatable failure mode that increases consumable churn
Key facts
- Explains common‑mode voltage and shaft current as bearing failure pathways
- Recommends shaft grounding devices and insulated bearings for high‑risk motors
- Notes insulated bearings are recommended on motors larger than 75 kW