Roller Chain Sprocket; 3" Bore; 100 Chain; 70 Teeth; 1 Row of Teeth; Hardened Teeth; 28.584" Outside Diameter; 27.861" Pitch Diameter; C-Hub Both Sides; Finished Bore Mount; No Bushing; 1-1/4" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material