1. Product Overview B43-8 (also marked HTF B43-8) non-standard single-row open deep groove ball bearing, overall dimension 43mm inner bore × 87mm outer diameter × 19.5mm width, fully interchangeable with original NSK B43-8, core bearing matched for Toyota K310, K313 series CVT secondary driven pulley. Open design without rubber seals, equipped with stamped low-carbon steel cage and factory standard C0 internal clearance. It bears heavy composite radial load and slight