Choosing the appropriate clearance for the guide rail is crucial. Generally speaking, considering the possible vibrations and impacts caused by reciprocating motion, choosing negative clearance (i.e. applying preload) can have a good impact on service life and accuracy. For specific information, please consult THK. We will help you choose pre pressing according to different usage conditions. All models of LM rolling guides (except for the HR, GSR, and GSR-R separation types) have their clearances adjusted according to regulations before shipment, so they do not need to be preloaded for adjustment. Preloading refers to the internal load applied to the rolling elements (steel balls, rollers) in advance, with the aim of increasing the rigidity of the LM slider. Roller guide is a compact and highly rigid bearing system. It is equipped with needle roller bearings inside, which can be used as cam discs and guide rollers for linear motion.
Due to its outer ring rotating in direct contact with the mating surface, this product is constructed with a thick wall and designed to withstand impact loads. Inside the outer ring, there are rolling needles with precision retainers to prevent the product from tipping over, achieving excellent rotational performance and being able to withstand high-speed rotation. It is necessary to choose materials that can meet the requirements of the usage environment for linear motion systems. In order to be able to be used in environments that require corrosion resistance, some linear motion systems can use martensitic stainless steel. THK provides dust protection accessories for LM rolling rails based on the model, such as end sealing baffles made of special synthetic rubber with high wear resistance, as well as side sealing baffles and internal sealing baffles to further improve dust protection. In harsh environments, THK also provides multi-layer contact scraper LaCS and dedicated telescopic covers according to the model. In addition, Ding HK also provides dedicated C-shaped hole covers on the LM track mounting holes, designed to prevent cutting debris and other debris from entering the LM track mounting holes. When used in environments prone to cutting debris and moisture, and also to provide dust protection for ball screws, it is recommended to use circular soft telescopic covers to protect the entire system or use large telescopic covers. Use a grease gun to apply grease through the grease tube joint installed on the linear motion system. If you need to apply grease to multiple locations, you can use a centralized pipeline to apply grease from one location.

Due to the fact that linear guides are standard components, for machine tool manufacturers, the only thing they need to do is to process a plane for installing the guide rails and adjust the parallelism of the guide rails. Of course, in order to ensure the accuracy of the machine tool, a small amount of scraping and grinding on the bed or column is essential, and 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, compared to a guide rail that can only withstand linear forces, standard horizontal installation is a simpler assembly method. Capable of maintaining high precision and accuracy when subjected to impact and vibration. When installation is limited by space, use screws for fixation and increase the number of screws if necessary.