Attributes . 4 Bolt Pillow Block; 7-13/16" Bore; 7-7/8" Base to Center Height; Tapered Adapter Sleeve Mount; Spherical Roller Bearing; 21-5/8" Minimum Bolt Spacing; 24-3/8" Bolt Spacing Maximum; Relubricatable; Cast Iron; Triple Ring Labyrinth; Non-expansion . Names