You may want to look at alternative methods than a friction clutch. It depends on what things are important. You have not stated weight, size, HP and a whole host of other things. Is it a dry clutch, wet clutch, multi-plate, single plate.
It gets a little tedious trying to guess what is needed. We are Engineers here and we work from facts. The design of things can change dramatically depending on scale, HP, materials etc. It is impossible to give answers to your questions with so little detail. Are you trying to move a 300-ton Military tank or spin up a 6" model gyro-copter rotor?