A first movable element includes a first Halbach array permanent magnet array. A second movable element placed in operable proximity to said first Halbach array includes a second Halbach array permanent magnet array. The first Halbach array is configured to transmit torque upon movement to the second movable element by magnetic force, wherein the torque is transferred with no physical contact occurring between the first movable element and the second movable element.
 The United States Government has rights in this invention pursuant to Contract No. DE-AC52-07NA27344 between the United States Department of Energy and Lawrence Livermore National Security, LLC.