Roller Chain Sprocket; 7/8" Bore; 40 Chain; 29 Teeth; 1 Row of Teeth; No Hardened Teeth; 4.898" Outside Diameter; 4-5/8" Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 1/2" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material