--- title: Current Insulating Bearings description: Current insulating bearings have a significant role in preventing damage to deep groove ball bearings in electrical applications. image: https://blog.nskamericas.com/hubfs/dgbb-5.jpg --- [Home](https://blog.nskamericas.com/) Close Menu - [Products](https://www.nskamericas.com/en/products.html)More - [Product Finder](https://www.nskamericas.com/en/products/nsk-innovative-products.html#%7B%22orderBy%22%3Afalse%2C%22filters%22%3A%7B%22nsk%3Aproduct-category%22%3A%5B%5D%7D%2C%22textfilter%22%3A%22%22%2C%22currentPage%22%3A1%2C%22shownResults%22%3A0%7D)More - [Agri Disc Hub](https://www.nskamericas.com/en/products/nsk-innovative-products/agri-disc-hub.html) - [Angular Contact Ball Bearings BMPC](https://www.nskamericas.com/en/products/nsk-innovative-products/angular-contact-ball-bearings-bmpc.html) - [Angular Contact Ball Bearings - High Performance](https://www.nskamericas.com/en/products/nsk-innovative-products/high-performance-angular-contact-ball-bearing.html) - [Angular Contact Ball Bearing - Outer ring guided brass cage](https://www.nskamericas.com/en/products/nsk-innovative-products/angular-contact-ball-bearing-outer-ring-brass-cage.html) - [Angular Contact Ball Bearings - ROBUST Series of Ultra high-Speed ACBB](https://www.nskamericas.com/en/products/nsk-innovative-products/angular-contact-ball-bearings-robust-ultra-high-speed.html) - [Angular Contact Ball Bearings - Sealed ACBB](https://www.nskamericas.com/en/products/nsk-innovative-products/sealed-angular-contact-ball.html) - [Angular Contact Ball Bearings - Wide Series ACBB for Machine Tool](https://www.nskamericas.com/en/products/nsk-innovative-products/angular-contact-ball-bearings-machine-tool.html) - [Angular Contact Ball Bearings with L-PPS Cage - For Screw Compressors](https://www.nskamericas.com/en/products/nsk-innovative-products/angular-contact-ball-bearings-l-pps-cage.html) - [Angular Contact Thrust Ball Bearings - Sealed ACTBB for Ball Screw Support](https://www.nskamericas.com/en/products/nsk-innovative-products/sealed-actbb-for-ball-screw.html) - [Aqua Bearings](https://www.nskamericas.com/en/products/nsk-innovative-products/aqua-bearings.html) - [APTSURF and NSKHPS for High Precision Cylindrical Roller Bearings](https://www.nskamericas.com/en/products/nsk-innovative-products/aptsurf-and-nskhps-for-high-precision-crb.html) - [Ball Bearings - Ceramic-Coated](https://www.nskamericas.com/en/products/nsk-innovative-products/ball-bearings-ceramic-coated.html) - [Ball Bearings - Low-Torque BB for Hybrid vehicles](https://www.nskamericas.com/en/products/nsk-innovative-products/ball-bearings-hybrid-vehicles.html) - [Ball Bearings - Prelubricated BB with EA3 Grease](https://www.nskamericas.com/en/products/nsk-innovative-products/prelubricated-ball-bearings.html) - [Ball Bearings - Ultra-long-life BB for Transmissions](https://www.nskamericas.com/en/products/nsk-innovative-products/ball-bearings-ultra-long-life-for-transmissions.html) - [Ultra-High-Speed Large-Diameter Ball Bearings for Motors in Hybrid Vehicles](https://www.nskamericas.com/en/products/nsk-innovative-products/ball-bearings-motors-hybrid-vehicles.html) - [Ball Bearings - Ultra-Sealed Radial Insert BB - 2..-DLS Series](https://www.nskamericas.com/en/products/nsk-innovative-products/ball-bearings-ultra-sealed-radial-insert-dls-serie.html) - [Ball screw II. 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High Load Capacity](https://www.nskamericas.com/en/products/nsk-innovative-products/cylindrical-roller-bearing-large-gearboxes.html) - [Cylindrical Roller Bearings for Wheelsets](https://www.nskamericas.com/en/products/nsk-innovative-products/cylindrical-roller-bearings-wheelsets.html) - [Cylindrical Roller Bearings - Full Complement CRB for Crane Sheaves](https://www.nskamericas.com/en/products/nsk-innovative-products/cylindrical-roller-bearings-crane-sheaves.html) - [Cylindrical Roller Bearings - ROBUST Series Ultra High-Speed Single Row CRB](https://www.nskamericas.com/en/products/nsk-innovative-products/cylindrical-roller-bearings-robust-series.html) - [Cylindrical Roller Bearing - Outer ring guided brass cage](https://www.nskamericas.com/en/products/nsk-innovative-products/cylindrical-roller-bearing-with-outer-ring-guided-brass-cage.html) - [Cylindrical Roller Bearing Units - Long-Life Split CRB Units](https://www.nskamericas.com/en/products/nsk-innovative-products/cylindrical-roller-bearing-split-units.html) - 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[Tapered Roller Bearings](https://www.nskamericas.com/en/products/nsk-innovative-products/taper-roller-bearings.html) - [Tapered Roller Bearings - Sealed-Clean Four Row TRB](https://www.nskamericas.com/en/products/nsk-innovative-products/taper-roller-bearings-sealed-cleaned-four-row.html) - [Tapered Roller Bearings with Aligning Rings](https://www.nskamericas.com/en/products/nsk-innovative-products/taper-roller-bearing-with-aligning-rings.html) - [TF Series Bearings](https://www.nskamericas.com/en/products/nsk-innovative-products/tf-series-bearings.html) - [Toughcarrier - TCH Series](https://www.nskamericas.com/en/products/nsk-innovative-products/toughcarrier-tch-series.html) - [Transmission Bearings - Low-Friction TM-Seal](https://www.nskamericas.com/en/products/nsk-innovative-products/transmission-bearings-low-friction-tm-seal.html) - [Transmission Bearings with Retainer Plate](https://www.nskamericas.com/en/products/nsk-innovative-products/transmission-bearings-with-retainer-plate.html) - 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In high-current environments, the electrical current can damage both the raceways and rolling elements of deep groove ball bearings, which, in turn, can cause the motor or other application to fail prematurely and occasionally without warning.  A motor failure can cause significant electrical damage and result in increased downtime. Current insulating bearings can help mitigate the damage done to[deep groove ball bearings](https://landing.nskamericas.com/nsk-deep-groove-ball-bearings/)by preventing the bearing itself from the electric current. Current-insulating deep groove ball bearings can reduce downtime in electric motors and other electrical applications. ## Understanding Current Insulating Bearings Bearings with a ceramic coating in the inner or outer ring are current-insulated bearings. Essentially, a current-insulated bearing acts as a resistor and capacitor connected in parallel. The ceramic layer provides insulation against the passage of the electrical current through the bearing. Hybrid bearings, in which the rolling elements in a deep groove ball bearing are made from ceramic, also function as current-insulating bearings.  The insulation helps the bearing to remain stable regardless of the operating conditions. As the ceramic coating does not conduct electricity, this non-conductive layer can give insulation to the bearing and prevent damage from electrical current. The higher the voltage the bearing will be exposed to, the greater the coating should be used to avoid damage. ## Significance in Electrical Applications Preventing electrical damage in rotating machinery should be of primary importance, as prevention can help avoid system failure and reduce the costs associated with machine downtime, production losses, and the expenses incurred for repairs. Using current insulating bearings from the planning stages and initial application construction will reduce maintenance repair costs, minimize downtime, and ensure continuous and reliable operation.  As the current insulating bearings interrupt the electrical circuit between the housing and shaft, the bearings will show significantly higher resistance to damage caused by electrical current than standard deep groove ball bearings. [![NSK-horizontal-cta-blog-800px](https://no-cache.hubspot.com/cta/default/20352179/interactive-170255728430.png)](https://blog.nskamericas.com/hs/cta/wi/redirect?encryptedPayload=AVxigLJPg0iS5oe65LStFzrTStvxmjktN8ujA6uHhBKfI0weDrNVO8DKkM5thmU%2BWpmV4s7likdZgB73MSTeK%2Bupg42EX1fdG7nfmqvKhPicCmd0BtkdQUX7bszufUlQ%2FoHomgHfNBAJTCfAyWhZDXxnOp1o1AXHqgmCfViWgTb%2B%2BdfIBcsasCeHKPraNTZOQlYhEOXQkQZq%2BD7nMrV4KcRTwd%2Fm&webInteractiveContentId=170255728430&portalId=20352179) ## How Current Insulating Bearings Work Damage to deep groove ball bearings and the application in its entirety usually presents initially as changes to the surfaces of the raceways. Dull, gray marks will appear on the raceways and rolling elements. “Fluting,” the washboard pattern that can develop along the raceway surface, indicates that an electrical current is passing through the bearing.  Each time the rolling element encounters these craters, it becomes displaced, impacting the more pronounced vibration and, eventually, bearing failure. Electrical current can also break down the lubricant, causing the bearings to overheat during operation. Current insulating bearings work by utilizing different non-conductive coatings to protect the operational elements of the bearings from this damage. These coatings provide electrical resistance and permit only deficient current levels to flow through the bearings.  Ceramic coating is the most popular, but bearings that use ceramic rolling elements in place of or in addition to ceramic coating on the raceways, known as hybrid bearings, are also effective. ## Applications and Industries  Current insulating bearings are typically used in applications where reduced friction, lower wear, and increased potential of damage from electrical current are a concern.  This can include: - High-speed machinery - Electric motors - Fans - Electrical pumps - Household appliances - Automotive components - Generators - HVAC applications Using ceramic-coated bearings designed to insulate from electrical arcs and currents will increase the longevity of these applications. In addition, any application that relies on high speed and requires low friction will benefit from current-insulated deep groove ball bearings, as they have greater longevity and can enhance performance. ## Considerations for Implementation When selecting current insulating bearings for specific applications, it is essential to consider several factors that meet the application’s particular requirements. These typically include: - Speed Requirements High-speed applications often benefit from current-insulating bearings. - Friction Requirements Applications that require low friction need deep groove ball bearings that are resistant to damage from electrical current. - Maintenance Considerations Current-insulating deep groove ball bearings have lower maintenance requirements than traditional ones. - Industry Standards and Regulations Several industries have stricter regulations for materials and coatings required for operation. It is always essential to consider specific industry requirements to guarantee compliance. ## Advancements and Future Trends Reliability and reduced downtime have become more important to developers, with an increased demand for longevity and longer intervals between maintenance or component replacement. Research is ongoing to determine if the service life can be extended even further with more effective coatings. The HDY2 ceramic-coated bearings available from NSK are currently among the most effective at preventing electrical damage, with superior insulation properties and exceptional durability over conventional ceramic-coated bearings.  ## Mitigate Electrical Damage with Insulating Bearings in Electrical Applications  Current insulating bearings have a significant role in preventing damage to deep groove ball bearings in electrical applications. Their ability to insulate the bearing from the passage of electricity is exceptional at mitigating electrical damage and ensuring operational reliability. When you want to extend the life of your deep groove ball bearings in electrical applications, NSK’s HDY2 series ceramic-coated bearings deliver superior results. When reliability is non-negotiable, entrust NSK to provide the optimal solution for your deep groove ball-bearing requirements. Contact us today to learn more.    ## Recent Posts - [Understanding Bearing Failure Modes](https://blog.nskamericas.com/understanding-bearing-failure-modes) - [Maintenance and Lubrication Tips for Deep Groove Ball Bearings](https://blog.nskamericas.com/maintenance-and-lubrication-tips-for-deep-groove-ball-bearings) - [Maintenance Free Bearings](https://blog.nskamericas.com/maintenance-free-bearings) - [Current Insulating Bearings](https://blog.nskamericas.com/current-insulating-bearings) - [Choosing the Right Deep Groove Ball Bearings for Your Application](https://blog.nskamericas.com/choosing-the-right-deep-groove-ball-bearings-for-your-application) ## Categories - [Deep Groove Ball Bearings](https://blog.nskamericas.com/tag/deep-groove-ball-bearings) - [Electric Motors](https://blog.nskamericas.com/tag/electric-motors) - [Maintenance](https://blog.nskamericas.com/tag/maintenance) [![NSK Logo, Link to Home](https://www.nskamericas.com/content/dam/nskcmsr/Layout/NSK-Logo-desktop-head.png)](https://nskautomation.com) ## Connect with Us Sign up for Our Newsletter © NSK AMERICAS 2024 [Sitemap](https://www.nskamericas.com/en/sitemap.html) [Contact](https://www.nskamericas.com/en/company/contact.html) [Disclaimer - Privacy Statement - Legal Notice](https://www.nskamericas.com/en/disclaimer-privacy-statement.html) [Terms and Conditions](https://www.nskamericas.com/en/terms-and-conditions.html)