2-31/32" Hub Diameter; Chain Coupling; Hub; Shaft; Bushed; 1/2 To 1-11/16 Bore Range; 3.946" Outside Diameter; 1" Length Thru Bore; 3/8" Between Shaft Ends; 50 Chain; 18 Teeth; 1-11/16" Width; 5018; Keyway

4-9/16" Hub Diameter; Chain Coupling; Hub; Shaft; Minimum Plain Bore; 1-1/8 To 3-1/8 Bore Range; 6.24" Outside Diameter; 2-3/8" Length Thru Bore; 0.59" Between Shaft Ends; 80 Chain; 18 Teeth; 2-3/8" Width; 8018; No Keyway

2-7/16" Bore; 3-1/2" Hub Diameter; Chain Coupling; Hub; Shaft; Finished Bore; 4.7" Outside Diameter; 1-7/8" Length Thru Bore; 0.47" Between Shaft Ends; 60 Chain; 18 Teeth; 1-7/8" Width; 6018; Keyway

Chain Hub; Chain Size 40; 16 Number of Teeth

Chain Coupling; Roller Type; 44.45MM Bore; 60 Chain Size; 18 Number of Teeth; With Keyway, 2 Set Screw