5-3/8" Hub Diameter; Chain Coupling; Hub; Shaft; Bushed; 7/8 To 3-1/4 Bore Range; 6.913" Outside Diameter; 2" Length Thru Bore; 0.59" Between Shaft Ends; 80 Chain; 20 Teeth; 2-5/8" Width; 8020; Keyway

1-1/4" Bore; 1-31/32" Hub Diameter; Chain Coupling; Hub; Shaft; Finished Bore; 2.818" Outside Diameter; 1-1/4" Length Thru Bore; 0.28" Between Shaft Ends; 40 Chain; 16 Teeth; 1-1/4" Width; 4016; Keyway