How to extend the life of your motor bearings
What happened
The article explains that variable-speed drives (VSDs) can introduce common-mode voltages that shorten motor bearing life and outlines retrofit options like shaft grounding devices and insulated bearings. It highlights practical fitment guidance (for example, insulated bearings on larger motors) and recommends installing grounding devices before commissioning. Watch for supplier lead-time impacts on retrofit kits and service availability when VSD-driven failures start to appear
Why the category manager should care
Prioritise specifying shaft-grounding or insulated bearings at purchase and stocking retrofit kits for VSD-driven motors to reduce emergency service spend
Key facts
- VSDs increase common-mode voltage risk to bearings
- Recommend shaft grounding devices or insulated bearings for larger motors
- Retrofit grounding often cheaper than repeated bearing replacements