An apparatus for securing a drive system to a ring in a medical imaging gantry, the ring defining a central longitudinal axis. The apparatus includes a ring having an outer race and an inner race rotatively mounted within the outer race, the inner race defining inner race teeth about a portion of its circumference, The apparatus also includes a drive system having a drive gear, defining drive gear teeth that are engaged with the inner race teeth, and defining tooth clearance there between. A mounting assembly is also included having at least one mounting bar rigidly attached to the outer race outer facing surface, the mounting bar including a transverse face being substantially perpendicular to the ring outer race circumference, at least one mounting plate secured to the drive system and transverse face of the at least one mounting bar.