Shearing force , N (lbf)
FB = Tensile force in the belt , N (lbf)
ms = Drive shaft weight, kg/mm (lb/ft)
l1 = Total shaft length, mm (ft)
lS = Shaft length, between outer bearings, mm (in.)
E* = Modulus of elasticity for shaft material, N/mm2 (lbf/in.2)
I = Inertia force for drive shaft, mm4 (in.4). See table below.
C = Force conversion factor. Metric: 9.8; Imperial: 1.0