Needle Bearing Idler Sprocket Bore Diameter 1 in Chain Number 60 Sprocket Material Steel Number of Teeth 17 Outside Diameter 4.46 in Bearing Material Steel Bearing Type Needle Roller For Use With Tightener Shaft Hub Diameter 2 5/8 in Length through Bore 1 in Lubrication Grease Maximum Radial Load at Speed 1083 lb @ 1000 rpm 1327 lb @ 500 rpm 2174 lb @ 100 rpm 880 lb @ 2000 rpm 961 lb @ 1500 rpm Sprocket Width 1 in Teeth Heat Treatment Hardened Teeth