Sprocket, Industry Chain Size 80, Industry Chain Pitch 1 in, Number of Teeth - Sprockets 13, Fixed Bore, Bore Dia. - Sprockets 1 1/2 in, Outside Dia. 4.646 in, Single Number of Chain Rows, Material - Sprockets Steel, Pitch Dia. 1.0 in, Type B, Length through Bore 1.5 in, Hub Dia. 3.0 in, Set Screw Hole Dia. 0.375 in, Keyway Size 3/8 in x 3/16 in, Setscrew Location One Setscrew Over The Keyway and A Second Setscrew At 90 Degrees , For Use With Roller Chain