Gearbelt Pulley Bore Diameter 1 in For Belt Series SilentSync For Belt Width 64 mm For Use With SilentSync Purple Belts Material Ductile Iron Number of Teeth 112 Outside Diameter 283.84 mm Pitch 8 mm Pitch Diameter 285.21 mm Bore Type Plain Face Width 65 mm Features Self-Tracking Design For Belt Trade Size P-112S Keyway No Keyway Depth Not Applicable Keyway Width Not Applicable Length through Bore 64 mm Material Fabrication Machined Maximum Operating Temperature 200 Degrees F