A reciprocating compressor is to be connected to an electric motor with the help of spur gears. The distance between the shafts is to be 500 mm. The speed of the electric motor is 900 r.p.m. and the speed of the compressor shaft is desired to be 200 r.p.m. The torque, to be transmitted is 5000 N-m. Taking starting torque as 25% more than the normal torque, 

determine :

1. Module and face width of the gears using 20 degrees stub teeth, and 

2. Number of teeth and pitch circle diameter of each gear. 

Assume suitable values of velocity factor and Lewis factor.