Roller Chain Sprocket; 1-1/4" Bore; 60 Chain; 23 Teeth; 1 Row of Teeth; Hardened Teeth; 5.907" Outside Diameter; 5.508" Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 3/4" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material