1. Product Overview 18BSC19 single-row non-standard thin-wall deep groove ball bearing, dedicated size 18mm inner bore × 36mm outer diameter × 9mm width, suffix C stands for optimized internal clearance matching for transmission working conditions. Fully interchangeable with original NSK 18BSC19, widely applied to miniature control shafts inside Asian passenger car automatic gearboxes. Multiple seal types available: open type, ZZ metal shield, 2RS double rubber seal. Adopts