Hub; Coupling; 1-1/2" Bore; 2-31/32" Hub Diameter; Chain Coupling; Shaft; Finished Bore; 3.92" Outside Diameter; 1-11/16" Length Thru Bore; 3/8" Between Shaft Ends; 50 Chain; 18 Teeth; 1-11/16" Width; 5018; No Bushing; Yes; Steel; 3600RPM Speed

Hub; Coupling; 4-9/16" Hub Diameter; Chain Coupling; Shaft; Minimum Plain Bore; 6.27" Outside Diameter; 2-3/8" Length Thru Bore; 37/64" Between Shaft Ends; 80 Chain; 18 Teeth; 2-3/8" Width; 8018; No Bushing; No; Steel; 2000RPM Speed

Hub; Coupling; 2-31/32" Hub Diameter; Chain Coupling; Shaft; Bushed; 3.92" Outside Diameter; 1-11/16" Length Thru Bore; 3/8" Between Shaft Ends; 50 Chain; 18 Teeth; 1-11/16" Width; 5018; 1610; Yes; Steel; 3600RPM Speed

Hub; Coupling; 5-11/16" Hub Diameter; Chain Coupling; Shaft; Minimum Plain Bore; 7.84" Outside Diameter; 2-3/4" Length Thru Bore; 23/32" Between Shaft Ends; 100 Chain; 18 Teeth; 2-3/4" Width; 10018; No Bushing; No; Steel; 1800RPM Speed

Hub; Coupling; 4-9/16" Hub Diameter; Chain Coupling; Shaft; Bushed; 6.27" Outside Diameter; 2-3/8" Length Thru Bore; 37/64" Between Shaft Ends; 80 Chain; 18 Teeth; 2-3/8" Width; 8018; SF; Yes; Steel; 2000RPM Speed