4-Bolt Flange Bearing, Ball Bearing Insert Type, 1 15/16 in Bore Dia., Bolt Hole Center-to-Center 4 3/8 in, Cast Iron Bearing Housing Material Type, Eccentric Locking Collar Shaft Locking Type, 52100 Chrome Steel Bearing Insert Material, RCJ Series, Bolt Size 5/8 in, Overall Height 2 19/32 in, Overall Width 5 5/8 in, Overall Length 5 5/8 in, Bearing Lubrication Mobil Polyrex EM or NLGI #2 Equivalent, Dynamic Load Capacity 8,800 lb, Static Load Capacity 5,100 lb