Attributes . 4 Bolt Pillow Block; 5-7/8" Bore; 7-1/16" Base to Center Height; Tapered Adapter Sleeve Mount; Spherical Roller Bearing; 19-3/8" Minimum Bolt Spacing; 21-5/8" Bolt Spacing Maximum; Relubricatable; Cast Iron; Triple Ring Labyrinth; Non-expansion . Names