1. Product Overview B33Z-12 non-standard single-row open deep groove ball bearing, overall dimension 33mm inner bore × 58mm outer diameter × 12mm width. The suffix Z stands for precision superfinished raceway with ultra-low friction loss, fully interchangeable with original NSK B33Z-12, matched for Toyota K310, K313 series CVT small intermediate transmission auxiliary shafts. Open design without rubber sealing rings, equipped with stamped low-carbon steel cage and standard C0