1. Product Overview LYS 207 2F is a medium-large metric spherical outer insert ball bearing with bilateral 2F composite labyrinth sealing assembly and eccentric locking collar. Different from set-screw locked LES/LSS series, it relies on an offset eccentric ring to achieve tight shaft clamping, which delivers stronger anti-slip performance under heavy alternating impact loads. Its exclusive 2F sealing unit combines outer metal anti-mud flinger and inner NBR rubber contact lip