A pump is driven by an electric motor through an open type flat belt drive. Determine the belt specifications for the following data.:

Motor pulley diameter(dS) = 300 mm,

Pump pulley diameter(dL) = 600 mm .

Coefficient of friction (μS) for motor pulley = 0.25,

Coefficient of friction (μL) for pump pulley = 0.20 .

Centre distance between the pulleys, C=1000 mm

Rotational speed of the motor=1440 rpm;

Power transmission = 20kW;

density of belt material (ρ)= 1000 kg/m3 ;

allowable stress for the belt material (σb) = 2 MPa;

thickness of the belt, tb = 5 mm.