Sprocket For Bushing Size SF For Bushing Type Quick Detachable For Chain Pitch 1 in Material Steel Number of Teeth 21 Outside Diameter 7.24 in Pitch Diameter 6.71 in Chain Number 80 For Number of Strands Single Maximum Bore Diameter 2 15/16 in Finish Black Oxide Hub Diameter 5 in Hub Projection 1.675 in Hub Type One Side Length through Bore 2 1/4 in Standards ANSI B29.1 BIS Teeth Heat Treatment Hardened Teeth Tooth Width 0.575 in Width Across Tooth Sets Not Applicable