1.Product Overview LSU 209 2F integrated vertical V-shaped grey cast iron bearing unit, matched with YAR209-2F double set screw insert bearing with bilateral extended inner ring. Double-sided 2F composite seal adopts centrifugal metal flinger + NBR rubber lip two-stage labyrinth barrier structure. Two symmetric M8 set screws lock inner ring evenly to support stable bidirectional forward & reverse rotation. Spherical outer ring provides ±2.5° self-alignment to compensate shaft