NTN Announces Release of KIZEI® Spherical Roller Bearing

Mt. Prospect, IL – NTN Bearing Corporation of America is pleased to announce the release of its latest innovation, the KIZEI (pronounced kee-zee) spherical roller bearing. KIZEI spherical roller bearings, developed by the NTN-SNR team in Annecy, France, are the first spherical roller bearings with metallic shields that protect the bearing from solid contamination such as dust, pebbles, and other debris.

In Japan, “Kisei” with an “s”, means “regulation”. Since the shields on the bearing “regulate” how much contamination is going in and how much grease is going out, it made for a fitting name. However, we switched out the “S” for a “Z” because in bearing part number terminology, metal shields, like those used in this new series, are commonly symbolized by a “Z” suffix – hence the name KIZEI. A “ZZ” suffix is added to the standard ULTAGE part number to identify a shield on both sides of the KIZEI series.

“We are thrilled to be able to offer our customers the newest of our cutting-edge solutions,” exclaimed James Misch, Director of Marketing and Technical Services, NTN. “Over the last four years, KIZEI spherical roller bearings have undergone extensive research, development, and real-world testing to get to this point, and we are pleased to finally be able to offer this revolutionary product to our customers at large.”

The unique design of KIZEI spherical roller bearings incorporates the metallic shields with the bearing retainer to form a one-piece protective barrier to keep contaminants out. Additionally, the metallic shields improve grease retention which helps improve bearing life.

In addition to the integration of the metallic shields into the design, KIZEI products also maintain the new standards set forth by NTN’s ULTAGE® spherical roller bearings. Featuring the industry’s highest speed and load ratings, as well as wide operating temperatures, ULTAGE is the newest generation of high-performance bearings from NTN and is the new standard in its spherical roller bearing offering.

Furthermore, KIZEI products come in standard ISO dimensions, ensuring interchangeability with 22200 series spherical roller bearings. Unlike the larger sealed spherical roller bearing models that require special tools & accessories for installation, KIZEI utilizes the same mechanisms used with standard open bearings – housing, accessories, mounting, grease, etc. – reducing maintenances costs.

NTN’s KIZEI spherical roller bearings have been proven to provide superior performance in demanding industries such as mining, metals manufacturing, wood processing, aggregate, cement, infrastructure, and construction.

Additional information on KIZEI spherical roller bearings can be found on Bearing Finder. Designed to aid distributors, design engineers, and end users in finding the perfect bearing or related product to use in any application, Bearing Finder is hosted on a proprietary platform that offers a customizable part search tool, interactive and downloadable CAD illustrations, comprehensive part interchanges, and exhaustive data sets.

To learn more about KIZEI shielded spherical roller bearings, please contact your NTN sales representative.