There are three ways to adjust the clearance of ball screw pair

一、墊片調隙法

1、 Gasket clearance adjustment method

這種方法通常是利用螺釘，通過連接滾珠絲杠副兩個螺母的凸緣，同時在凸緣之間添加墊片來調整。添加的墊片的厚度能夠讓螺母產生軸向位移，從而達到間隙和產生預緊拉力的作用。墊片調隙法的特點是結構簡單、可靠性高、剛度高以及裝卸方便。但是有利也有弊，這種方法耗時，而且一旦調整好之后在滾珠絲杠工作時不能再隨意調整，如果想要滾珠絲杠副的間隙再變化，那么則想要更換不同厚度的墊片來進行。

This method is usually adjusted by connecting the flanges of two nuts of ball screw pair with screws and adding gaskets between the flanges. The thickness of the added gasket can make the nut produce axial displacement, so as to eliminate the clearance and produce the pre tightening force. The characteristics of the gasket clearance adjustment method are simple structure, high reliability, high stiffness and easy handling. But there are advantages and disadvantages, this method is time-consuming, and once adjusted, it can not be adjusted at will when the ball screw is working. If you want to change the clearance of the ball screw pair, you want to replace the gasket with different thickness.

二、螺紋調隙法

2、 Thread gap adjustment method

螺紋是這樣產生的，其中一個螺母的外端有緣而另一個螺母的外端沒有凸緣而制成螺紋，當它伸出套筒外時，用兩個圓螺母將之固定住，然后旋轉螺母，即可間隙，并產生預拉緊力。

The thread is produced in such a way that the outer end of one nut has a flange, while the outer end of the other nut has no flange. When it extends out of the sleeve, it is fixed with two round nuts, and then the nut is rotated to eliminate the gap and generate the pretension force.

三、齒差調隙法

3、 Tooth difference adjustment method

在兩個螺母的凸緣上各自制圓柱齒輪，兩個齒輪相差一個齒，然后裝入內齒圈中，內齒圈用螺釘或者定位銷固定在套筒上。調整滾珠絲杠間隙時，先取下兩端的內齒圈，當兩個滾珠螺母相對于套筒同方向轉動相同齒數時，一個滾珠螺母對另一個滾珠螺母產生相對角位移，從而使得滾珠絲杠螺母對于滾珠絲杠的螺旋滾道發生相對位移，達到間隙并施加預緊拉力的目的。

On the flange of the two nuts, cylindrical gears are made by ourselves. The two gears differ by one tooth, and then they are installed into the inner ring gear, which is fixed on the sleeve with screws or locating pins. When adjusting the clearance of the ball screw, first remove the inner gear ring at both ends. When the two ball nuts rotate the same number of teeth in the same direction relative to the sleeve, one ball nut produces relative angular displacement to the other ball nut, so that the ball screw nut produces relative displacement to the spiral raceway of the ball screw, so as to eliminate the clearance and apply the preloading force.