The R188-ZZ is a precision miniature ball bearing featuring inch-dimensional specifications, engineered for compact mechanisms requiring smooth operation at high rotational speeds. Featuring double metal shields (ZZ), this miniature bearing provides effective protection against contaminant ingress while maintaining grease retention in space-constrained assemblies. With a 6.35mm bore (1/4 inch), 12.7mm outer diameter (1/2 inch), and 3.175mm width (1/8 inch), it serves as the ideal solution for RC hobby applications, dental handpieces, 3D printer components, and precision rollers where consistent performance under light loads is essential.