1. Product Overview LYS 209 2F is large-size spherical outer insert bearing with bilateral 2F composite labyrinth seal and eccentric locking collar, interchangeable with YEL209-2F standard series. The eccentric collar clamps the whole shaft evenly to stop slipping under heavy vibration and impact loads. The 2F dual-layer seal combines metal flinger and rubber lip to block farm mud, crop straw and industrial dust. Pre-filled with heavy-duty high-temp grease and fitted with