The First Spherical Roller Bearing with Metallic Sheilds

NTN’s KIZEI® (pronounced “key-zee”) bearing is the first spherical roller bearing designed to incorporate metallic shields and bearing retainers to form a one-piece protective layer. This unique design keeps solid contamination out while retaining maximum grease, delivering longer bearing life leading to less downtime and maintenance costs.

Unlike similar sealed or shielded spherical roller bearings that are wider to accommodate the added protection, KIZEI products are standard ISO dimensions, ensuring complete interchangeability.

KIZEI maintains our ULTAGE® platform standards: the industry’s highest limiting speeds, best load capacities and unmatched service life.

Let us show you how KIZEI may be a solution to your application needs. Contact your local NTN Territory Manager to schedule a review!

If we can help you in any additional way, email us at, or call our technical hotline at 1.800.323.2358.

*Sign-up for our eKnowledge courses, which are web-based training programs to help you better understand and maintain your NTN bearings.

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