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 50, Outside Diameter 125.96 mm, Pitch 8 mm, Pitch Diameter 127.33 mm, Bore Type Plain, Face Width 33 mm, Features Self-Tracking Design, For Belt Trade Size W-50S, Keyway No, Keyway Depth Not Applicable, Keyway Width Not Applicable, Length through Bore 33 mm, Material Fabrication Machined, Maximum Operating Temperature 200 Degrees F