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Dalian Kate HTPM manufacturer introduces the service life of Kate Precision HTPM linear guide.

Publish Time：

2022-08-31

The lifespan of a linear guide is defined as the total running distance until surface peeling occurs on the raceway surface and balls due to material fatigue. Under the same working conditions, a batch of guide components with the same structure and size are operated separately. Before 90% of the guide components show fatigue damage, the sum of the distance the slider moves relative to the guide or the working hours under a certain speed.
The lifespan of linear guides has a large degree of dispersion. Even products from the same batch, used under the same motion conditions, will have different lifespans. Therefore, when selecting linear guides, we can estimate their lifespan based on the basic dynamic rated load and working load.

Linear Guide.jpg

(1) Hardness coefficient (fh)
In actual guide systems, in order to fully utilize the rolling linear guide, the hardness of the raceway surface in contact with the steel balls should be between HRC58～64. If the raceway surface hardness is low, the rated dynamic load will decrease, and the rated lifespan of the guide will be reduced. Therefore, the rated dynamic load and rated static load of the guide should be multiplied by the hardness coefficient fH. The following figure shows the hardness coefficient fH corresponding to different raceway surface hardnesses.

(2) Temperature coefficient (ft)
When the temperature of the guide system exceeds 100℃, compared with use at room temperature, the rated dynamic load is reduced, and the rated lifespan is shortened. Therefore, the rated dynamic load and rated static load of the guide should be multiplied by the temperature coefficient fT. The following figure shows the temperature coefficient fT corresponding to different temperatures.

(3) Load coefficient (fw)
When calculating the rated lifespan, the influence of external loads and usage scenarios should also be considered, including the weight of the object and changes in inertial forces caused by the speed of movement. For this purpose, a load coefficient fW is introduced. The value of fW varies under different usage conditions.

 

Kate, rated, load, coefficient, guide rail, life, hardness, temperature, use, linear guide rail

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