The R133 is a compact inch-series miniature deep groove ball bearing with a 2.38 mm (0.0937 in) bore, 4.762 mm OD, and 1.588 mm width . It provides reliable radial support in high-speed applications (up to 73,000 rpm grease, 85,000 rpm oil ), making it suitable for small motors, precision instruments, and office automation equipment.
