The R155-ZZ is a precision-engineered imperial miniature ball bearing specifically developed for applications requiring a 5/32-inch shaft interface. Featuring a dual-shielded ("ZZ") construction, this model provides a robust defense against dust and debris, ensuring the internal raceways remain clean and well-lubricated. This enclosed design makes the R155-ZZ an ideal, "set-and-forget" component for high-speed micro-motors, precision encoders, and small-scale mechanical linkages where reliability and low-maintenance operation are paramount.