1. Product Overview LSF 207 2F square four-bolt cast iron flange bearing assembly, matched with SU207-2F double set screw insert bearing. It is equipped with double-sided 2F composite sealing structure combining metal flinger and NBR rubber lip to realize two-stage mud and dust isolation. Two symmetric M10 set screws lock the inner ring evenly, stable for forward and reverse rotation under heavy vibration. Spherical outer ring provides ±2.5° self-aligning function to absorb