不预压珠丝杠垂直放置时，螺帽会因自身重量而引起转动，无预压丝杠将有相当大的间隙，因此只能在阻力较小的机器上使用，但其主要顾虑是定位精度要求较高。确定正确的预压量，并在出货前调整预压。因此，在订购滚珠丝杠前，请仔细仔细地详细说明设备的运行情况。

When the ball screw is not pre pressed and placed vertically, the nut will rotate due to its own weight, and there will be a considerable gap without pre pressing the screw. Therefore, it can only be used on machines with low resistance, but its main concern is that it requires high positioning accuracy. Determine the correct preloading amount and adjust the preloading before shipment. Therefore, before ordering ball screws, please carefully and thoroughly explain the operation of the equipment.

扭转位移过度

Excessive torsional displacement

丝杠细长比应控制在60以下，若细长比过大，丝杠就会产生自重下垂。如果热处理不正确，硬化层过薄硬度分布不均匀等情况都会导致扭转位移过大。

The slenderness ratio of the screw should be controlled below 60. If the slenderness ratio is too large, the screw will experience self weight sagging. If the heat treatment is not correct, or if the hardening layer is too thin and the hardness distribution is uneven, it can lead to excessive torsional displacement.

轴承选择不当

Improper selection of bearings

滚珠丝杠通常要配有斜角轴承，特别是用高压力角的轴承是较好的选择，在滚珠丝杠承受轴向负荷时，一般深沟滚珠轴承都会产生一定量的轴向背隙，所以深沟滚珠轴承不适合这种情况。

Ball screws usually need to be equipped with bevel bearings, especially bearings with high pressure angles are a better choice. When the ball screw is subjected to axial loads, deep groove ball bearings generally produce a certain amount of axial backlash, so deep groove ball bearings are not suitable for this situation.

轴承安装不当

Improper installation of bearings

（1）如果轴承安装在滚珠丝杠上，但两者粘着不确实，则当它们受到轴向负荷时，会引起背隙，这种情况可能是丝杠肩部过长或过短。

(1) If the bearings are installed on the ball screw but the adhesion between the two is not accurate, they will cause backlash when subjected to axial load, which may be due to the shoulder of the screw being too long or too short.

（2）轴承承靠面与锁定螺帽v齿轴心的垂直度不加，或两个方向上锁定螺帽面平行度不佳，都会引起轴承倾斜，所以丝杠肩锁螺帽v形牙与轴承承靠面要同时加工，保证垂直度，若采用研磨方式加工比较好。

(2) The lack of verticality between the bearing support surface and the V-tooth axis of the locking nut, or poor parallelism between the locking nut surfaces in both directions, can cause the bearing to tilt. Therefore, the V-shaped teeth of the screw shoulder locking nut and the bearing support surface should be machined simultaneously to ensure verticality. If grinding is used, it is better.

（3）用两个锁盖与弹簧垫圈固定轴承，防止轴承在运转时松开。

(3) Secure the bearings with two lock covers and spring washers to prevent them from loosening during operation.

在发现滚珠丝杠产生间隙的时候，我们需要及时地分析原因，采取正确的处理措施，确保不影响设备的正常运行和使用

When discovering gaps in the ball screw, we need to analyze the cause in a timely manner and take correct measures to ensure that it does not affect the normal operation and use of the equipment