Engineered specifically for applications where radial space is strictly limited and weight reduction is critical, the 6817-ZZ is a premium thin-section deep groove ball bearing from the 6800 extra-light series. Equipped with dual pressed-steel shields (ZZ), this bearing acts as a highly effective barrier against industrial debris while retaining its factory-filled lubrication. Because the metal shields are non-contacting, the 6817-ZZ minimizes rotational friction and startup torque, making it an exceptional solution for large-diameter shafts in lightweight machinery, robotic joints, and precision optical equipment.