Gearbelt Pulley Bore Diameter 1 in For Belt Series SilentSync For Belt Width 52.5 mm For Use With SilentSync Green Belts Material Steel Number of Teeth 34 Outside Diameter 148.73 mm Pitch 14 mm Pitch Diameter 151.52 mm Bore Type Plain Face Width 54.5 mm Features Self-Tracking Design For Belt Trade Size G-34S Keyway No Keyway Depth Not Applicable Keyway Width Not Applicable Length through Bore 37 mm Material Fabrication Machined Maximum Operating Temperature 200 Degrees F