The repositioning accuracy of a ball screw depends on several factors such as the lead accuracy, nut accuracy, preload, and mounting accuracy. Generally, ball screws have high repositioning accuracy and can achieve repeatability of up to ±0.005 mm or better. However, the actual accuracy may vary depending on the specific application and operating conditions. It is important to consider factors such as thermal expansion, vibration, and lubrication when determining the repositioning accuracy of a ball screw.