1. Product Overview B43Z-7 non-standard single-row open deep groove ball bearing, dimension 43mm inner bore × 83mm outer diameter × 13.5mm width, suffix Z means optimized internal raceway structure for CVT high-temperature working environment, fully interchangeable with original NSK B43-7 transmission bearing, core matching Toyota K310, K313 series CVT gearbox pulley and intermediate shafts. Open design without rubber seals, equipped with stamped low-carbon steel cage and