Gearbelt Pulley Bore Diameter 7/8 in For Belt Series SilentSync For Belt Width 32 mm For Use With SilentSync White Belts Material Steel Number of Teeth 18 Outside Diameter 44.47 mm Pitch 8 mm Pitch Diameter 45.84 mm Bore Type Fixed Face Width 33 mm Features Self-Tracking Design For Belt Trade Size W-18S-7/8 Keyway No Keyway Depth Not Applicable Keyway Width Not Applicable Length through Bore 33 mm Material Fabrication Machined Maximum Operating Temperature 200 Degrees F