(Solved): A rigid coupling is used to connect a 45kW,1440rpm electric motor to a centrifugal pump. The ...

A rigid coupling is used to connect a $$45\mathrm{kW},1440\mathrm{rpm}$$ electric motor to a centrifugal pump. The starting torque of the motor is $$225\%$$ of the rated torque. There are 8 bolts and their pitch circle diameter is $$150\mathrm{mm}$$. The bolts are made of steel with yield in tension of $$380\mathrm{MPa}$$. A factor of safety to be used is 2.5 . Determine the diameter of the bolts. Assume that the bolts are finger tight in reamed and ground holes. Take $$S_{y\mathrm{y}}=0.577{\mathrm{S}}_{\mathrm{yn}}$$ (5 Marks)