UCFC213-40 Flange Cartridge Bearing 2-1/2" Bore Mounted BearingUCFC213 40 Flange Cartridge Bearing Unit Set Screw Lock 2 1 2" Inch Bore Heavy Duty Cast Housing 4 Bolt Mount The UCFC213 40 is a rugged flange cartridge bearing unit designed for high load, high performance applications. Featuring a 2 1 2" inner diameter insert (UC213 40) mounted in a 4 bolt round cast housing (FC213), its ready for use in conveyors, agricultural machines, construction equipment, and industrial drives. Inner diameter: 2 1 2" inch