UCP205-16 FYH Bearing Pillow Block Bearing Cylindrical bore (with set screws) 1" inch Inner Diameter Bearing This is the most common type of mounted ball unit. The rib at the bottom of the housing mounting section provides for a robust unit that can withstand great loads from any direction. it is used for applications with severe loading and shock load conditions. Tapered-bore style units are offered individually and adapters are sold separately.