THK ball screw manufacturer will discuss the factors affecting ball screw clearance below.

　　THK ball screw manufacturer: Several factors affecting ball screw clearance.

　　Ball screw clearance problems will directly affect the normal, effective, and smooth linear reciprocating motion. Although there are methods to adjust this gap, it is necessary to find the root cause of the problem. Only by finding the root cause can the problem be solved fundamentally. In many cases, there are possibilities that the ball screw will cause the gap to increase, and the main factors affecting the ball screw clearance are as follows.

　　1. Excessive torque displacement

　　The main reasons for affecting torque displacement may be improper material selection or insufficient heat treatment. Of course, if the initial design, that is, the length is not properly controlled, it will also affect the torque displacement.

　　2. Improper bearing installation

　　If the ball screw and bearing are not properly installed during installation, when subjected to external loads, the shoulder of the rod will be too long or too short. In this case, the existence of a gap is inevitable. Moreover, bearing tilt will lead to poor vertical angles.

　　3. The parallel surfaces of the bracket are not smooth enough

　　If the parallelism of the parallel surfaces of the support screw does not meet the standard at the beginning, it will also cause a larger gap during installation. In this case, adjusting the screw will not make any difference.

　　When installing and using the ball screw at the beginning, the fixed factors considered are the above three. However, the factors or problems affecting the screw clearance are not only these, but also the improper installation of the nut seat or bearing, especially when the bearing is not properly installed, resulting in clearance problems is a very common basic phenomenon.

　　THK ball screw manufacturer: Ball screw clearance adjustment techniques

　　When adjusting the clearance, the ball screw mainly adjusts the clearance and tooth difference between the nut washer and the spring. The following details how to operate.

　　1. Double nut washer adjustment method

　　It mainly depends on the thickness of the washer. The thickness of the washer should be just right to allow the inner and outer nuts to displace accordingly, just right. This method has the advantages of high rigidity and simple structure, but it is not suitable for frequent use because it is relatively troublesome to adjust.

　　2. Spring automatic adjustment method

　　The spring is mainly used to cause the nut to produce axial displacement. If this method is used, the possibility of ball screw wear and spring deformation is higher. Moreover, the load requirements are also high, and it can basically only adapt to low-load situations.

　　3. Tooth difference gap adjustment method

　　It mainly relies on the angle of the outer tooth relative to the inner tooth to eliminate the gap, but the pretightening force is accurate enough. Basically, this method is only suitable for positioning systems.

　　There are three methods for adjusting the clearance of the ball screw. When choosing to use, consider the load to decide, and the selection of the automatic spring adjustment method needs to regularly check the working performance of the spring and the working performance of the guide rail. In addition, there is another thread clearance adjustment method that can be considered appropriately.

　　That's all for today's introduction by THK ball screw manufacturer. Thank you for watching.