Profile: American Ball Screw Repair LLC specializes in providing ball screw repair and rebuilding processes. Ball screw failure is most often caused by the gradual degradation of the ball screw surface through metal to metal contact of the re-circulating balls to the hardened metal surface of the ball screw shaft. We stock almost every size of ball in at least 0.000050 inch (50 millionths) increments, which be believe is absolutely necessary to be able to recondition all types and sizes of ball screws.