Rolling linear guide
A rolling linear guide pair consists of a guide rail, slider, steel balls, cage, reverser, sealing plate, and sealing cover. It boasts advantages such as high transmission efficiency, strong load-bearing capacity, and high dynamic and static rigidity, and is widely used in CNC machine tools, automation, and industrial robots.
The reverser causes the steel balls to circulate infinitely, and is one of the main sources of frictional resistance, vibration, and noise in the guide pair. The return curve of the reverser is half a branch of the intersection line formed by the intersection of two cylinders. Due to the symmetry of the intersection line, both ends of the return curve have tangents parallel to the load-bearing groove and the straight return path.
In a rolling linear guide pair, the steel balls move within a closed ring formed by the guide rail, slider, reverser, and end cover. When the steel ball passes through the reverser in the groove, it moves from the non-load-bearing area to the load-bearing area (or vice versa), causing a significant change in friction. The maximum friction occurs when the steel ball moves to the non-load-bearing area. One cycle of a steel ball can be divided into a load-bearing zone, a non-load-bearing zone, and a transition zone. The transition zone plays an important role in the stress state of the steel ball and the accuracy of the entire rolling linear guide pair. If the movement of the steel ball in the transition zone changes from linear motion to curvilinear motion instantaneously, a sudden change in speed will occur, which will cause vibration and noise. Therefore, a transition straight line auxiliary reversing section needs to be designed in the load-bearing groove and the straight return groove of the return ball curve of the reverser.
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sales@cwlbearing.com
service@cwlbearing.com
Post time: Jul-10-2026
