Roller Chain Sprocket; 1-1/4" Bore; 40 Chain; 18 Teeth; 1 Row of Teeth; No Hardened Teeth; 3.136" Outside Diameter; 2.879" Pitch Diameter; B-Hub One Side; Finished Bore Mount; No Bushing; 1/2" Chain Pitch; ANSI Roller Chain; Keyway; Steel Material

Link; 40 Chain Size; Spring Clip; Connecting Link; 1/2" Chain Pitch; Standard; 1 Strand; Carbon Steel; 0.312" Roller Diameter; 0.312" Roller Width; 0.06" Plate Thickness; 0.46" Plate Height; 5/32" Pin Diameter; Curved