Roller Chain Sprocket; 1-1/4" Bore; 60 Chain; 27 Teeth; 1 Row of Teeth; No Hardened Teeth; 6.867" Outside Diameter; 6.461" Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 3/4" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material