Is linear guide selection difficult? Many people would say yes. If you make the wrong choice at the beginning, it can lead to a host of problems down the line. To be honest, it’s not extremely difficult, but the prerequisite is that you have sufficient knowledge reserves!
Currently, the well-known brands of linear guides mainly include HIWIN, CSK, THK, IKO, CPC, TBI, ABBA, etc. Each brand has its own focus, but the model designations are generally similar.
Generally speaking, as long as you follow these nine steps below, it can help you select the right model easily. They are:
Define the usage conditions.
Select the appropriate series product.
Choose the precision grade.
Determine the slider size and quantity.
Calculate the load on the sliders.
Select the preload.
Confirm the rigidity.
Calculate the service life.
Select the lubrication method.
Put simply, first, we need to choose a suitable linear guide based on our operating environment. For example, in a dusty environment like wood cutting, we should choose a model with good dust resistance. Then, we can proceed with the precision selection. Generally, the precision of linear guides is divided into five grades: Normal (C), High (H), Precision (P), Super Precision (SP), and Ultra Precision (UP). Next, we can confirm the rail length and the number of sliders. In practice, a common rule of thumb for selecting the linear guide size is to match the diameter of the ball screw used. For instance, if the ball screw diameter is 32mm, you would typically choose a linear guide from the 30 series.
Following that, you can proceed with the selection and confirmation of the guide’s rigidity, preload, and service life. Considering that dust and debris in the actual application environment can affect performance, it is recommended to choose a specification one size larger.
In summary, linear guide selection is not actually difficult. As long as you follow these 9 steps, the basic selection of a linear guide becomes easy! This article is for reference only. For actual situations, please refer to the selection manual or consult a professional.
