a locking ring assembly retains a bearing to a shaft rotatably supported on a first axis of rotation . guide pins extend axially from an annularly shaped bearing retainer slidably disposed on the shaft toward the pressure ring , also slidably on the shaft . a head of the guide pins is slidably disposed and captured in adjusting apertures of the pressure ring . pressure screws in the adjusting apertures of the pressure ring translate axially in the apertures of the pressure ring when rotated , engaging the guide pin heads to displace the pressure ring from the bearing retainer . the pressure ring reacts against a reaction element disposed on the shaft opposite the bearing retainer to develop an axial thrust load against the bearing .