1. Product Overview LES 212 2F heavy spherical outer insert bearing features fully extended bilateral inner ring, symmetric double set screws and two-sided 2F composite labyrinth seals, interchangeable with YAR212-2F standard model. The two-stage 2F seal adopts rotating metal flinger plus NBR rubber lip to block thick farm mud, crop straw residues and coarse workshop dust. Spherical outer ring provides ±2.5° self-aligning function to offset slight shaft installation