1. Product Overview UYF212-2F four-bolt square cast iron flange bearing unit, matched with YAR212-2F single-side extended inner ring eccentric lock insert bearing. Double-sided 2F composite seal adopts metal flinger + NBR lip two-stage barrier to block mud, crop debris and cooling water splashes. Eccentric locking collar tightly clamps single extended inner ring for stable single-direction rotation under heavy long-term vibration. Spherical outer ring provides ±2.5° self