Electrically Insulated Bearings
Insulated Bearings
Bearings with an insulating layer or ceramic parts that stop electric current passing through the bearing in motors and generators.
Brands available: NTN, FAG, SKF, NSK, NBC, DTC, SLS
Request a quoteTypes we supply
| Coated outer / inner ring | Insulating ceramic coating on one ring; standard dimensions |
| Hybrid | Ceramic rolling elements with steel rings |
Sizes on request. Tell us the exact number and we confirm the version before dispatch.
About these bearings
Current passing through a bearing can burn small pits into the raceways and cause fluting, noise and early failure. This is common in motors driven by variable-frequency drives and in generators. An insulated bearing blocks that path.
Two common designs are a bearing with an insulating ceramic coating on the outer or inner ring, and a hybrid bearing with ceramic balls. The right choice depends on voltage, speed and size. Tell us the motor make, frame size and the bearing now fitted.
- Blocks stray current through the bearing
- Coated-ring and hybrid ceramic designs
- Fits standard housings and shafts
- Longer bearing life in VFD-driven motors
Typical applications
- Motors driven by variable-frequency drives
- Wind and industrial generators
- Traction motors
- Pumps, fans and compressors with VFDs
Frequently Asked Questions
How do I know if I need an insulated bearing?
Look for frosted or fluted marks on the raceways, repeated early failure, or a motor run on a variable-frequency drive. We can help you decide from the failure photo.
Do I need to insulate both ends of the motor?
Usually the non-drive end is insulated first. The right approach depends on the motor and drive, so tell us the details and we will advise.
Can’t find your size?
We supply sizes, brands and special versions of specialty bearings that are not listed on this page. Type the exact size or designation you need and send it to us for a quote.
Need pricing on Insulated Bearings?
Share the number, quantity and preferred brand — our technical team will confirm the version and reply within one business day.