UCP203 Pillow Block Bearing Unit 17×40×27.4mm for Fan and Packaging Equipment Product Overview UCP203 is complete two-bolt pillow block assembly combining P203 cast iron housing and UC203 spherical insert bearing. The spherical outer surface of insert bearing enables self-alignment to accommodate slight shaft misalignment. Built-in double lip seals keep grease inside and prevent dust ingress. Pre-assembled and pre-greased for fast field installation. *Need a quick quote? Just