1. Product Overview LES 215 2F heavy spherical outer insert bearing adopts fully extended bilateral inner ring, 120° symmetric double set screws and two-side 2F composite labyrinth seals, interchangeable with YAR215-2F standard model. The two-stage 2F seal combines rotating metal anti-mud flinger and NBR rubber lip to block farm mud, crop straw waste and coarse industrial dust. Spherical outer ring provides ±2.5° self-aligning function to offset slight shaft installation