1. Product Overview LYS 211 2F heavy spherical outer insert bearing is fitted with bilateral 2F composite labyrinth seals and anti-loosening eccentric locking collar, fully interchangeable with YEL211-2F standard model. The full-circumference eccentric collar provides uniform clamping force, effectively stopping inner ring slipping under heavy impact and continuous vibration. Two-stage 2F seal with rotating metal flinger and NBR rubber lip blocks farm mud, crop straw and