The MR115-ZZ is a high-performance miniature deep groove ball bearing specifically constructed for applications where unhindered rotational speed and strict space limitations are top priorities. Featuring dual pressed steel shields (ZZ), this 5×11×4 mm component effectively guards the internal raceways against dry particulates and dust while retaining the factory-applied lubricant. Because the metal shields do not make physical contact with the inner ring, this bearing delivers zero-drag operation, making it an exceptional choice for rapid-motion assemblies like RC vehicles, fishing reels, and delicate micro-motors.