Roller Chain Sprocket Bore Diameter 3/4 in For Chain Pitch 1/2 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 2 1/4 in Number of Teeth 35 Outside Diameter 5.86 in Pitch Diameter 5.578 in Bore Type Plain Chain Number 40 Finish Black Oxide Hub Diameter 3 1/4 in Hub Projection 0.716 in Keyway No Keyway Depth Not Applicable Keyway Width Not Applicable Length through Bore 1 in Number of Set Screws 0 Set Screw Location Not Applicable