Sprocket Bore Diameter 3/4 in For Chain Pitch 5/8 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 2 1/4 in Number of Teeth 36 Outside Diameter 7.52 in Pitch Diameter 7.171 in Bore Type Plain Chain Number 50 Finish Black Oxide For Pitch Type Single Pitch Hub Diameter 3 1/4 in Hub Projection 0.907 in Includes Set Screws Keyway Yes Keyway Depth 3/32 in Keyway Width 3/16 in Length through Bore 1 3/8 in Material Grade 1045