If we explore deeply in some mechanical equipment, we will find a lot of things that we do not understand. Ball screws are important transmission elements in mechanical design. After understanding, we found that some ball screws need to be preloaded. Why? Let me tell you about it below.
Ball screw rod
The state of the fine clearance between the ball screw thread groove and the ball greatly changes the characteristics of the ball screw. Earlier we mentioned the accuracy level of the lead screw. In practical applications, we can usually use preload to adjust the accuracy requirements of the lead screw.
In order to reduce the clearance of the ball screw and improve the rigidity, the so-called preload uses a set of balls or a pair of nut to displace each other in the axial direction and the force exerted on the ball screw.
Designers who often look at the selection catalog of lead screws will understand that in the selection, we will look at the axial clearance. Different types and models have different axial clearances. Here is the axial clearance.
