1. Product Overview LES 213 2F heavy spherical outer insert bearing adopts fully extended double-side inner ring, 120° symmetric double set screws and bilateral 2F composite labyrinth seals, interchangeable with YAR213-2F standard model. Two-stage 2F seal consists of rotating metal anti-mud flinger and NBR rubber lip to block farm mud, crop straw and coarse industrial dust. Spherical outer ring achieves ±2.5° self-alignment to compensate slight shaft installation deflection.