Gearbelt Pulley Bore Diameter 1/2 in For Belt Series SilentSync For Belt Width 32 mm For Use With SilentSync White Belts Material Steel Number of Teeth 90 Outside Diameter 227.82 mm Pitch 8 mm Pitch Diameter 229.19 mm Bore Type Plain Face Width 33 mm Features Self-Tracking Design For Belt Trade Size W-90S Keyway No Keyway Depth Not Applicable Keyway Width Not Applicable Length through Bore 33 mm Material Fabrication Machined Material Grade 4140