A frame stiffener for a power tong frame comprises a body having a top surface securable to a top plate of the frame, a bottom surface securable to the bottom plate of the frame, an outer side and an interior side having a plurality of recesses, each recess formed to conform to an angular portion of an adjacent dumbbell roller secured within the frame along with a plurality of other dumbbell rollers to rollably surround, engage and stabilize a ring gear rotatably disposed within the frame.