4-1/2" Hub Diameter; Chain Coupling; Hub; Shaft; Minimum Plain Bore; 1-1/8 To 3 Bore Range; 5.67" Outside Diameter; 2-1/4" Length Thru Bore; 7/16" Between Shaft Ends; 60 Chain; 22 Teeth; 2-1/4" Width; 6022; No Keyway; Steel