Can you please provide shaft design calculation for the below purpose?
Power to be transmitted : 120 Kw
Rpm : 35 rpm
Shaft support bearing crs : 2.1m
Shaft dia : ?
Shakee, welcome to the forum, but that is not exactly how this site works.
You need to do some research and find out how to calculate the results yourself. Then, when you have done the calculations and if you are unsure you have it right, or you just want to validate your work, come back with your workings for us to check. Either that or ask more questions. This is NOT a free Engineering design service, but we will help guide you to generate the results you need.