The difference between ball screw and linear guide

Linear guides and ball screws are very different. Although they belong to linear transmission equipment, their working principles, requirements and scope of application are different, but the performance of the two in linear transmission is very good.

Ball screw is the most commonly used transmission element in tool machinery and precision machinery. It is composed of screw, nut, steel ball, pre-compression piece, reverser, and dustproof device. Its main function is to convert rotary motion into linear motion, or convert torque into axial repetitive force, and it has the characteristics of high precision, reversibility and high efficiency. It is mainly used in some large-scale engraving machinery for machine tools, etc. It is very convenient to convert rotary motion into linear motion, which is very convenient to use, thereby reducing the wear of the entire equipment in terms of rotation.

Linear guides are widely used but have many types, such as surface grinders, slicers, wire cutting, UV printers, etc.; the linear guides selected are also different due to different working conditions, and are most suitable for precision measuring instruments, semiconductor manufacturing and inspection equipment, For non-standard automatic machinery and equipment and other applications where precise linear motion is important, it is also important to choose the correct guide rail for different equipment.

The characteristics of ball screw ：

1. Compared with the sliding screw pair, the driving torque is 1/3

Because there are many balls rolling between the screw shaft and the nut of the ball screw pair, a higher motion efficiency can be obtained. Compared with the past sliding screw pair, the driving torque is less than 1/3, that is, it can achieve The power required for the same motion result is 1/3 of the use of the rolling screw pair. It is very helpful in terms of power saving.

2. Guarantee of high precision

The ball screw pair is continuously produced with the world's highest level of machinery and equipment. Especially in the factory environment of grinding, assembly, and inspection, the temperature and humidity are strictly controlled, and the accuracy is achieved due to the perfect quality management system. To be fully guaranteed.

3. Micro feed is possible

Because the ball screw pair uses ball motion, the starting torque is very small, and there will be no crawling phenomenon like sliding motion, which can ensure the realization of accurate micro feed.

4. No backlash, high rigidity

The ball screw pair can be preloaded, because the preload can make the axial gap reach a negative value, and then obtain higher rigidity (the ball screw is used to preload the balls, and when it is actually used in mechanical devices, due to the ball The repulsive force can increase the rigidity of the silk mother part).

5. High-speed feed is possible

The ball screw can realize high-speed feed (movement) due to its high motion efficiency and low heat generation.