Hiwin HG Series Linear Rails

The preloading of a linear guide rail is to apply a load force to the steel ball in advance. Simply put, it is to increase the diameter of the steel ball and use the negative gap between the steel ball and the ball track to apply preloading. This behavior can improve the rigidity of the linear guide rail and eliminate gaps. It is worth noting that for small sizes, it is recommended to use preloading below light preloading to prevent the service life from being reduced due to excessive preloading.

Pre pressure is set differently based on different sizes and scenarios. According to the magnitude of pre pressure, it can be divided into different pre pressure levels, including no pre pressure, medium pre pressure, and heavy pre pressure. We can choose the appropriate pre pressure based on its purpose.

For conveying equipment, automatic packaging machines, fuses, etc. with fixed load direction, low impact, and low precision requirements, medium preloading can be selected. For discharge machining machines, NC machine tools, industrial robots, etc. with light load and high precision requirements, medium preloading can be selected. For grinding machines, vertical or horizontal milling machines, heavy cutting machines, etc. with rigid requirements and requirements for sensational and impact environments, heavy preloading is required.

Preloading actually refers to the tightness of the combination between the slider and the guide rail, and the magnitude of preloading directly affects the rigidity of the guide rail. To get back to the point, preloading refers to the tightness of the combination between the guide rail and the slider. To change the preloading of the guide rail, it can only be achieved by adjusting the diameter of the steel ball. For example, the standard steel ball diameter is 3.175. If you want to tighten it, choose a steel ball larger than 3.175. If you want to loosen it, choose a steel ball smaller than 3.175.

HG Series,Linear Rails