Pillow Block Bearing, Ball Bearing Insert Type, 1 3/8 in Bore Dia., Bolt Hole Center-to-Center 5 1/8 in, Mounting Surface to Shaft Center 1 13/16 in, Cast Iron Bearing Housing Material Type, Set Screw Shaft Locking Type, 52100 Chrome Steel Bearing Insert Material, SAK Series, Number of Bolts 2, Bolt Size 1/2 in, Overall Height 3 5/8 in, Overall Width 1 25/32 in, Overall Length 6 9/16 in, Bearing Lubrication Mobil Polyrex EM or NLGI #2 Equivalent, Dynamic Load Capacity 6,400 lb