1. Product Overview LEU 204 2F integrated vertical V-base grey cast iron bearing unit, matched with YAR204-2F double set screw insert bearing. Bilateral 2F composite seal adopts centrifugal metal flinger + NBR rubber lip two-stage barrier. Two symmetric M4 set screws lock extended inner ring for stable bidirectional rotation. Spherical outer ring provides ±2.5° self-alignment to offset shaft assembly misalignment. Dual-layer sealing blocks light mud, crop dust, fine powder