1. Product Overview B60-57 non-standard single-row open deep groove ball bearing, dimension 60mm inner bore × 101mm outer diameter × 17.2mm width, fully interchangeable with original NSK B60-57, core large bearing for Nissan JF011E CVT primary pulley/main drive shaft assembly. Open design without rubber seals, equipped with stamped low-carbon steel cage and factory standard C0 internal clearance. It bears heavy radial load and slight bidirectional axial load, maintains stable