Abstract: An armature is limited in its axial movement by a pair of retainer clamps positioned over a bearing that has been press fitted onto the shaft of the armature. The clamps are first secured by bolts through an end cap onto lower surfaces in first recessed regions in the end cap in an orientation to allow insertion of the bearing into the bearing bore of the end cap. The motor is then assembled preventing further direct access to the clamps. After assembly the clamps are first loosened so that they are no longer secured to the surfaces. Next, the bolts are turned in a clockwise direction which first turns the clamps until they hit a vertical wall in the end cap which orients the clamps partially over the bearing, and then the clamps tighten onto the lower surfaces of second recessed regions.

Abstract: A dual-sided test head for an integrated circuit test system. Each side of the test head has a floating contact surface which provides an electrical contact interface between one side of the test head and a respective load board. Each load board is part of a respective integrated circuit handling system. As the test head has two sides and a load board is contacted at each side, the floating contact surfaces facilitate docking of the test head to the respective load boards. The contactors are floating so as to have freedom of motion to rotate, tilt, offset laterally or offset vertically, relative to the test head.