Pillow block bearings provide critical support for shafts in industrial fans, cooling tower fans, blowers, and HVAC systems. These applications demand smooth, quiet, and continuous operation at medium to high speeds, often with shaft misalignment due to thermal expansion or mounting deflections. Self-aligning bearing types, such as those with spherical roller bearings housed in a spherical seat (SN series adaptor-type), are frequently employed. This design allows the bearing to automatically adjust to angular misalignment, preventing excessive load concentration and premature failure. The housings are often designed with cooling fins for better heat dissipation. Effective sealing is crucial to keep out airborne dust and moisture. By ensuring stable, low-vibration rotation, these bearing units contribute directly to fan efficiency, reduced energy consumption, extended service life, and lower overall noise levels in ventilation and climate control systems.