K/H disc brakes - hub replacement - studs

When I'm pressing the rotor onto the hub, I presume I am actually pressing the studs into the rotor and then pressing the studs/rotor (as a unit) into the hub? or is the rotor a "loose" fit?...

The rotors are held onto the rotor by the studs. The rotor is not a press fit. It is a good idea to have them balanced when done.