Adapters for Taper-Lock bushings are recommended for use where it is more convenient to straight bore than to drill, tap and taper bore hubs to accommodate bushings. The adapter is a gray iron, taper-bored sleeve which fits into the straight bore of a hub. The bushing simply fits inside the adapter which is tapped for the bushing screws. When tightening the locking screws, adapter is expanded against the hub bore contracting the bushing tightly upon the shaft. Dodge Taper Lock Bushing Adapter, 11 in Dia, 4-1/2 in Length, For Use With: 4545 Taper Bushing, 7-7/8 in OD, 1 x 3/16 in Keyseat, Iron, Gray