Ball screw manufacturer It is stated that the ball screw and nut feature semi-circular helical grooves. The nut is equipped with steel balls that guide the fluid circuit. As the ball screw rotates, the steel balls both spin within the dovetail guide rail and circulate along the dovetail guide rail’s path, thereby causing the worktable to move radially. Thanks to its advantages—such as high-speed operation, high rigidity, reversibility, long service life, and easy maintenance—the ball screw has gained widespread adoption in the modern CNC machine tool industry, becoming one of the key distinguishing features of CNC lathes compared to conventional machine tools.

　　1. Inspection and Maintenance of Gaps in Ball Screw Nut Assemblies and Support Systems

　　 The ball screw manufacturer stated that, When a CNC lathe exhibits significant reverse-direction deviation, unstable precision levels, or cutting marks caused by overtravel limits, the first step is to check whether there is play in the ball screw system. The inspection method involves using an internal diameter dial indicator in combination with bearing steel balls: place the steel balls into the center hole at one end of the ball screw and use the dial indicator to precisely measure the axial runout of the ball screw. Simultaneously, use another internal diameter dial indicator to precisely measure the movement of the worktable. Rotate the ball screw both clockwise and counterclockwise, observe the readings displayed on the two dial indicators, and determine the location of the fault based on the variations in these readings.

　　2. If, when using a dial indicator to precisely measure the ball screw, the needle does not wobble as the ball screw rotates in both forward and reverse directions, it indicates that the ball screw itself is stable and free of wobble. However, if the needle of the internal-diameter dial indicator does wobble, it suggests that the ball screw has a wobbling issue. The difference in readings from this internal-diameter dial indicator represents the axial play distance of the ball screw. At this point, we should check whether the backing cap of the support bearing is properly tightened, whether the support bearing has worn out or become ineffective, and whether the preload sealing ring for the rolling bearing is appropriately fitted. If the rolling bearing is in good condition, simply re-machining and reinstalling a new preload sealing ring will suffice. But if the rolling bearing is damaged, it must be replaced, followed by re-machining and reinstalling a new preload sealing ring, and then tightening the backing cap securely. The magnitude of axial play in the ball screw is primarily determined by the precision of the preload sealing ring on the support bearing. Ideally, during ball-screw assembly, there should be no clearance between the two ends; instead, the support bearing should have a slight interference fit of approximately 0.02 mm.

　 The ball screw manufacturer stated that, Ball screw nut assembly: The ball screw nut is designed to bear radial loads. Radial forces and bending moments can impose additional surface contact pressures on the ball screw nut, potentially leading to damage or failure of the ball screw. Therefore, when installing and maintaining ball screw systems, it is essential to pay attention to the following points. MOSIONX ball splines typically consist of a gear shaft, a recirculating sleeve, a spline sleeve, and steel balls. Like ball screws, they offer high transmission efficiency, reversible motion, excellent conformity, and high precision. Ball screws convert rotary motion into linear motion, and conversely, they transform linear motion back into rotary motion—making them ideal for a wide range of applications.

　　1. The centerline of the ball screw must be parallel to the central axis of the guide rail that comes with the ball screw. At both ends of the CNC lathe, the bearing with housing and the nut holder must lie on a single straight line through three points.

　　2. During nut installation, position the nut as close as possible to the mounting location.

　　3. During the installation of the support bearing, position it as close as possible to the nut installation location.

　　4. When installing a ball screw on a CNC lathe, you must not remove the nut from the ball screw.