Hiwin HG Series Linear Rails

Linear guide slider is a type of rolling guide, which is mainly operated by steel balls rolling infinitely between the slider and the guide rail, allowing the load platform to easily move linearly along the guide rail with high precision and reducing the friction coefficient to one fiftieth of that of traditional sliding guide. It can easily achieve high positioning accuracy. The final unit design between the slider and the guide rail enables the linear guide rail to simultaneously bear loads in all directions, including up, down, left, and right.

The motion of the linear guide slider changes from a curve to a straight line during operation. Its new guide system allows the machine tool to achieve fast feed speed, which is a characteristic of linear guides when the spindle speed is the same. Linear guides, like flat guides, have two basic components; One serves as a fixed component as a guide, and the other is a moving component. Due to the fact that linear guides are standard components, for machine tool manufacturers, all they need to do is process a plane for installing the guide rails and adjust the parallelism of the guide rails.

Linear guide slider, to a certain extent, requires a small amount of scraping and grinding of the bed or column during use for the accuracy of the machine tool. In most cases, installation is relatively simple. The guide rail used as a guide is made of hardened steel and is finely ground before being placed on the installation plane. Compared with flat guide rails, the geometric shape of the cross-section of linear guide rails is more complex. The reason for the complexity is that grooves need to be machined on the guide rails to facilitate the movement of sliding components. The shape and number of grooves depend on the function that the machine tool needs to complete. For example, a guide rail system that can withstand both linear forces and overturning moments has significant differences in design compared to a guide rail that can only withstand linear forces.

The basic function of the fixed component (guide rail) of the linear guide slider system is like a bearing ring, a bracket for installing steel balls, and has a "v" shape. The bracket wraps around the top and two sides of the guide rail. In order to support the working components of the machine tool, a set of linear guides has at least four brackets. Used to support large working components, the number of brackets can exceed four.

When the working parts of the linear guide slider machine move, the steel balls circulate in the groove of the bracket, distributing the wear of the bracket to each steel ball, thereby extending the service life of the linear guide. In order to eliminate the gap between the bracket and the guide rail, preloading can improve the stability of the guide rail system. The preloading is achieved by installing oversized steel balls between the guide rail and the bracket. The diameter tolerance of the steel ball is ± 20 microns, with increments of 0.5 microns. The steel balls are sorted and installed on the guide rail separately. The size of the preload depends on the force acting on the steel ball.

HG Series,Linear Rails