Roller Chain Sprocket Bore Diameter 1/2 in For Chain Pitch 1/2 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 1 1/4 in Number of Teeth 14 Outside Diameter 2.49 in Pitch Diameter 2.247 in Bore Type Plain Chain Number 41 Finish Black Oxide Hub Diameter 1 3/4 in Hub Projection 0.648 in Keyway No Keyway Depth Not Applicable Keyway Width Not Applicable Length through Bore 7/8 in Number of Set Screws 0 Set Screw Location Not Applicable