Roller Chain Sprocket; 1-3/4" Bore; 60 Chain; 42 Teeth; 1 Row of Teeth; No Hardened Teeth; 10.458" Outside Diameter; 10.037" Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 3/4" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material