precision full protection worm gear worm shaft type slewing drive, customer used it to dual axis servo positioner on vertical shaft. This high precision worm gear worm shaft slewing drive is very suitable for vertical use. The self-locking function of the slewing drive can make the dual axis servo positioner stop at any height without increasing brakes, without increasing cost, safe and reliable. Precision design can ensure high accuracy of the servo positioner in vertical direction and meet the requirements of customers.