Dynamic mounting is the most effective method of eliminating all types of thermal stress and distortion in steel rotor applications. This mounting system allows the rotor to expand and contract independently of the mounting hat or hub as the rotor goes through temperature changes. This eliminates all strain or bind at the mounting points. The rotor runs truer, last longer, and all undo stress on the hats or hubs is eliminated. Dynamic mounting is preferred in all applications where tempory but extreme temperature spikes make cause high expansion rates in steel.