A 100 mm steel drive shaft transmitting 150 kW at 300 rpm has to be connected to a machine having same diameter shaft with the cast iron (CI) unprotected flange coupling. The permissible shear stress for the shaft bolt and key are 50 MPa The bearing stress for bolt and key are 50 MPa and shear stress for CI is 8 MPa. The basic dimensions of the coupling may be assumed as per the standard design the coupling and verify all major dimensions for strength.