1. Product Overview LYS 215 2F heavy spherical outer insert bearing is fitted with bilateral 2F composite labyrinth seals and anti-loosening eccentric locking collar, fully interchangeable with YEL215-2F standard model. The full-circumference eccentric collar provides uniform clamping force, effectively preventing inner ring slipping under heavy impact and continuous vibration loads. Two-stage 2F seal with rotating metal flinger and NBR rubber lip blocks thick farm mud, crop