At present, there are many brands in the linear guide market, and each brand can be replaced. This is also the trend of the entire transmission machinery product market. When selecting the linear guide rail, first determine the rail width, which refers to the width of the slide rail. Rail width is one of the key factors that determine the size of its load.
Secondly, determine the rail length of the linear guide. This total length = effective stroke + slider spacing (more than 2 sliders) + slider length × number of sliders + safety stroke at both ends. If you add a protective cover, you need to add two The compressed length of the end shield. It should be noted that, please ask in advance the greater length of the entire guide rail of the brand of this specification. If the length exceeds this length, it needs to be used for docking.
It should be noted that the distance between the mounting holes on the linear guide rail is fixed. The user should pay attention to the position when determining the length of the rail. If the supplier does not tell the required end size, the general state of arrival is 10 mounting holes, guide rails The distance from the two ends to the center of the respective mounting hole is 30, 30, but other sizes are also possible. Different brands have slightly different shipping regulations for end sizes, and most of them are equal by default.
Also determine the type and number of sliders. There are two types of sliders commonly used in linear guides, flange type and square. The former is a bit lower in height, but wider, and the mounting hole is a through threaded hole, while the latter is higher and narrower, and the mounting hole is a threaded blind hole. Both have short type, standard type and extended type. The main difference is that the length of the slider body is different; of course, the hole spacing of the mounting holes may also be different.
The linear guides of any manufacturer will mark the accuracy level. For most industrial machinery, the general level accuracy can meet the requirements. The higher level is H level. For CNC machine tools and other equipment, the P level is common. For other ultra-precision machinery, SP and UP are appropriate.
In addition to the above four main parameters, there are some parameters that need to be determined, such as the type of combined height, pre-compression level, etc. There are two main types of combination height: high assembly type and low assembly type. As the name suggests, the combination height of the high assembly type is higher, and the low assembly type is lower.