The SX-6 Type is a standard coupling with two hubs, a spacer and two disc pack kits. The coupling has two flex planes (one at each disc pack) so it can accommodate parallel misalignment by the angular misalignment in each disc pack. This configuration will also accommodate axial misalignment within the specified limits. Lovejoy® Disc Coupling Hub, Type SX-6 Standard, 255-6 Coupling, 55 mm Bore, 255 mm Diameter Flange, 155 mm Diameter Hub, 16 mm W x 4.3 mm D Keyway, 3080 RPM Unbalanced/7700 RPM Balanced Maximum, 115.06 mm Length Through Bore, AISI 1045 Steel, Metallic