wˈʌn ʌvðə dˈɪsks, nˈoːɹməli ðə lˈoʊd sˈaɪd, ɪz mˈaʊntᵻd ˌɔn ɐ ʃˈæft ðæt ɐlˈaʊz ɪt təbi mˈuːvd ɪn ɹᵻlˈeɪʃən tə ðə dɹˈɪvən dˈɪsk, ɐlˈaʊɪŋ ɪt tə mˈuːv fɹʌm ɐ pəzˈɪʃən æt ðə sˈɛntɚɹ ʌvðə dɹˈɪvən dˈɪsk tʊ ɪts ˈaʊɾɚ ɹˈeɪdɪəs.
One of the disks, normally the load side, is mounted on a shaft that allows it to be moved in relation to the driven disk, allowing it to move from a position at the center of the driven disk to its outer radius.