Does anybody know where I can pick up a Axis Motion Transducer Encoder part number 3-154-0234 for my Bridgeport cnc mill. It is the feed rate over-ride control on the operators panel. It looks like a potentiometer but I am not sure if it is after reading Bridgeports description on it which scared the hell out of me now. See the attached picture. It locked up on me, so maybe it can be un-locked so to speak but not sure yet.