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 56 Outside Diameter 141.24 mm Pitch 8 mm Pitch Diameter 142.61 mm Bore Type Plain Face Width 33 mm Features Self-Tracking Design For Belt Trade Size W-56S Keyway No Keyway Depth Not Applicable Keyway Width Not Applicable Length through Bore 33 mm Material Fabrication Machined Maximum Operating Temperature 200 Degrees F