Abstract: The diametral clearance of an aperture of a bearing is measured by an apparatus which includes a mounting for placing both the bearing and an associate pivot in axial relation with each other along an axis of alignment and positioning devices for positioning the pivot in relation to the bearing. The positioning devices include axial direction positioning devices for adjusting the pivot in each of two mutually perpendicular axial directions transverse to the axis of alignment to locate an approximate center of bearing clearance and for adjusting the pivot from the approximate center of bearing clearance in each of the mutually perpendicular axial directions until the pivot displaces the bearing in the corresponding direction.

Abstract: An apparatus measures torque in high accuracy, close tolerance, precision output axis suspension bearings and corresponding pivots. The bearings are received in corresponding apertures at the ends of axial aligned, rotatable test shafts. A pendulum, having an eccentric cylindrical shaped aperture for holding a pair of pivots in axial alignment, is disposed between the test shafts, the pivots being received in the bearings. The pendulum is further provided with a reflective panel; a laser light source is arranged to direct a beam of laser light onto the pendulum reflective panel, and a photosensitive position sensing array is oriented to sense a laser light beam reflected off the panel. The test shafts are rotated, and the magnitude of a deflection of the reflected laser light beam is measured by the array, and is directly proportional to torque in the bearings.