The 677-ZZ is a high-precision, thin-walled miniature bearing engineered for applications that require a larger shaft diameter within a restricted outer housing. Equipped with dual metal shields (ZZ), this 7×11×3 mm component provides a reliable barrier against dry contaminants without sacrificing rotational speed. The non-contact design of the steel shields ensures that the bearing maintains ultra-low starting torque, making it an essential part for battery-sensitive devices and high-frequency micro-motors where thermal management and energy efficiency are paramount.