The R3-ZZ is a high-precision, double-shielded single-row miniature ball bearing engineered for exceptional rotational performance in applications where low starting torque and high speeds are critical. Unlike contact rubber seals, this model features dual non-contact pressed steel shields (ZZ) that effectively retain the factory grease and block larger dust particles without generating additional frictional resistance. Designed with fractional inch dimensions—a 3/16-inch bore, 1/2-inch outer diameter, and 0.196-inch width—the R3-ZZ provides a perfect mechanical solution for compact devices, micro-motors, and high-frequency appliances.