Bushed Roller Chain Sprocket For Bushing Size 2012 For Bushing Type Split Taper For Chain Pitch 1/2 in Material Steel Number of Teeth 70 Outside Diameter 11.43 in Pitch Diameter 11.145 in Chain Number 40 For Number of Strands Single Maximum Bore Diameter 2 in Finish Black Oxide Hub Diameter 3 5/8 in Hub Projection 0.966 in Hub Type One Side Length through Bore 1 1/4 in Standards ANSI B29.1 BIS Teeth Heat Treatment Not Hardened Tooth Width 0.284 in