Bushed Roller Chain Sprocket For Bushing Size 1210 For Bushing Type Split Taper For Chain Pitch 1/2 in Material Steel Number of Teeth 18 Outside Diameter 3.14 in Pitch Diameter 2.879 in Chain Number 40 For Number of Strands Single Maximum Bore Diameter 1 1/4 in Finish Black Oxide Hub Diameter 2 15/32 in Hub Projection 0.716 in Hub Type One Side Length through Bore 1 in Standards ANSI B29.1 BIS Teeth Heat Treatment Hardened Teeth Tooth Width 0.284 in