It's a 1.688-inch, 42.875 millimeters by 0.0 inches, 0.0 millimeters by 3 inches, 76.2 millimeters, link belt PLB6927R pillow block bearings.
1.688 Inch | 42.875 Millimeter x 0 Inch | 0 Millimeter x 3 Inch | 76.2 Millimeter  LINK BELT PLB6927R  Pillow Block Bearings