Gearbelt Pulley Bore Diameter 1 in For Belt Series SilentSync For Belt Width 32 mm For Use With SilentSync White Belts Material Cast Iron Number of Teeth 180 Outside Diameter 457.01 mm Pitch 8 mm Pitch Diameter 458.38 mm Bore Type Plain Face Width 33 mm Features Self-Tracking Design For Belt Trade Size W-180S Keyway No Keyway Depth Not Applicable Keyway Width Not Applicable Length through Bore 33 mm Material Fabrication Machined Maximum Operating Temperature 200 Degrees F