Belt Conveyors for Bulk Materials - Fifth Edition - CEMA
i = 1.5 for 6" diameter idler rolls, CEMA C6, D6 A i = 1.8 for 5" diameter idler rolls, CEMA B5, C5, D5 A i = 2.3 for 4" diameter idler rolls, CEMA B4, C4 A i = 2.4 for 7" diameter idler rolls, CEMA E7 A i = 2.8 for 6" diameter idler rolls, CEMA E6 For regenerative declined conveyors, A i = 0. The A