Idler Sprocket Bore Diameter 1 in Number of Teeth 27 Outside Diameter 4.6 in Pitch 14 mm Compatible Tightener Shaft Grainger Part Number 813Y51 Bearing Type Needle Roller Compatible Tightener Shaft Manufacturer Part Number N2 Face Width 2.313 in For Belt Series HTD For Belt Trade Size HTD For Belt Width 55 mm For Use With HTD Belts Material Fabrication Cast Number of Flanges 0