If the ground ball screw nut  is not lubricated enough, the screw will rub, which will affect its accuracy and service life.If the ground ball screw nut  has axial clearance, it will also affect the entire production process. So when there is a problem with the ball screw nut , how to maintain it?

      1. Lubrication of round ball screw nut

Lubricants can improve the wear resistance and transmission efficiency of the  ground ball screw. Lubricants can be divided into two categories: lubricating oil and grease.  Lubricating oil is generally used in full-loss systems, and grease can be lithium-based grease. Grease is generally added to the thread raceway and the housing space where the nut is installed,and the lubricating oil is injected into the space of the nut through the oil hole on the housing.

         The grease on the ground ball screw should be replaced every six months, the old grease on the screw should be cleaned, and new grease should be applied.

      2. Adjustment of axial clearance

        In order to ensure the reverse transmission accuracy and axial stiffness, the axial clearance needs to be removed. The method of removing the gap of the double-nut ball screw  is to use the relative axial displacement of the two nuts to make the balls in the two ball nuts close to the two opposite sides of the spiral raceway. 

       In addition, the ground ball screwgap between the screw mounting part and the driving part must be removed. The commonly used methods for adjusting the gap of the double-nut screw are: gasket gap adjustment type, thread gap adjustment type and tooth difference gap adjustment type.

Dimensional re-inspection