Bushed Roller Chain Sprocket For Bushing Size 2517 For Bushing Type Split Taper For Chain Pitch 1 in Material Steel Number of Teeth 28 Outside Diameter 9.475 in Pitch Diameter 8.931 in Chain Number 80 For Number of Strands Single Maximum Bore Diameter 2 1/2 in Finish Black Oxide Hub Diameter 4 1/4 in Hub Projection 1.175 in Hub Type One Side Length through Bore 1 3/4 in Standards ANSI B29.1 BIS Teeth Heat Treatment Hardened Teeth Tooth Width 0.575 in