The definition of the service life of a linear slide rail refers to the continuous cyclic pressure between the steel ball and the track when the linear slide rail is subjected to a load and collides. Once it reaches the critical contact point of fatigue, friction begins to occur and partial peeling occurs on the surface, which is called surface peeling. Therefore, the distance between the steel ball and the bead path due to the peeling motion caused by fatigue during use.

The rated service life of a linear motion system: The service life of a linear motion system is usually different for products manufactured in the same batch and used in the same environment. Therefore, the rated service life is used as a reference value to calculate the service life of a linear motion system. Its definition refers to the total distance traveled by a batch of the same products under the same conditions, where 90% of them do not experience surface peeling, and the total distance traveled is called the rated service life of the linear motion system.

How to calculate the rated life of linear slides:

The service life L of a linear slide rail may vary depending on the actual load it bears, and can be calculated based on the dynamic rated load C and working load P of the level.

Without considering the influence of environmental factors, the life calculation formula is as follows: L=(C/P) 3 * 50 L: rated life (KM) C: basic dynamic rated load (N) P: external load (N)

Based on the above, we can see that the maximum service life under rated load is 50KM. When converted into our travel and daily distance, we can roughly calculate the time for replacing the linear guide rail.

When considering the impact of environmental factors, its service life is affected by changes in motion state, bead hardness, and stability:



L={(Fc*Fh*Ft/Fw)*C/Pc}三次方*50

 

L: Rated lifespan (KM)

C: Basic dynamic rated load (N)

P: External load (N)

Fc: Contact coefficient

Fh: Hardness coefficient

Ft: Temperature coefficient

Fw: Load factor

When we use multiple precision contact sliders, the linear module will be affected by torque loads and installation accuracy, making it difficult to obtain an accurate load distribution. If multiple sliders are used precisely, multiply the basic rated load by the contact coefficient

Number of tight sliders        contact coefficient
        2个                                           0.81
        3个                                           0.72
       4个                                            0.66
       5个                                            0.61
       6个                                            0.6
       1个                                               1
From the calculation of the linear guide above, we can find that when we use 6 sliders, our theoretical lifespan is only 30KM