The UCFB204 RICH is a reliable cast iron bearing unit featuring a 4-bolt square flange housing, specifically designed for applications requiring precise, fixed mounting to a machine frame. The rugged cast iron construction provides superior stability and shock absorption. The unit includes a self-aligning bearing insert with a 20 mm bore and CN (Normal) clearance, which is securely locked to the shaft (locking mechanism implied by UC insert type). The self-aligning feature allows the unit to compensate for initial shaft misalignment, ensuring prolonged bearing life and smooth operation. The UCFB204 RICH, with its compact design and 32 mm bolt hole center distance (J), is an excellent choice for conveyor heads, transmissions, and industrial fan assemblies.